Livros - Capítulos: Recent submissions

  • IPEN-DOC 25630

    CORREIA, SABRINA A.; CRUZ, PEDRO V. ; RODRIGUES, TASSON C.; MONTEIRO, ALEX ; DIAZ, FRANCISCO R.V.; MOURA, ESPERIDIANA A.B. . Production and characterization of a hybrid composite of polypropylene reinforced with piassava (Attalea funifera Martius) fiber and light green clay. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 735-746, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_74

    Abstract: Waste materials have been frequently used as reinforcing materials, to obtain a composite with better properties. Piassava palm is native to the state of Bahia (Brazil) and its fiber, piassava fiber (PF) is awaste material frequently used for industrial and domestic brooms, industrial brushes, carpets, and roofs. The light green clay (LGC) is a natural smectite Brazilian clay from the state of Paraiba. This work aims to produce and evaluate the advantages of this new product achieved by the inclusion of these two natural materials into polypropylene (PP) matrix. A melting extrusion process, using a twin-screw extruder and injection molding machine was used to obtain PP/LGC (97/3 wt%), PP/PF (90/10 wt%) and PP/LGC/PF (87/3/10 wt%) composites. The materials were characterized by mechanical tests, TG, DSC, SEM, and XRD analysis.

    Palavras-Chave: polypropylene; fibers; composite materials; clays

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  • IPEN-DOC 25629

    FRANCISCO, DANAE L. ; PAIVA, LUCILENE B. de; ALDEIA, WAGNER; LUGAO, ADEMAR B. ; MOURA, ESPERIDIANA A.B. . Investigation on mechanical behaviors of polyamide 11 reinforced with halloysite nanotubes. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 693-701, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_69

    Abstract: The inorganic halloysite nanotubes (HNTs) are a promising type of natural occurring filler for polymers. Its characteristics such as high aspect ratio (10–50), small size, and high strength (elastic modulus—140 GPa) suggest that HNTs have a potential use in high-performance polymer nanocomposites. Compared to other nanoclays and nanosilica, the relatively low content of hydroxyl groups on their surfaces makes HNTs relatively hydrophobic, although, sometimes, this is not sufficient for guaranty a good interfacial adhesion in composite systems. In the present study, halloysite nanotubes were incorporated in a polyamide 11 (PA11) matrix by melt extrusion, using a twin-screw extruder and injection molding machine. The neat PA11 and PA11/HNT nanocomposites were characterized by mechanical tests (tensile, flexural and impact tests), and the correlation between properties were discussed.

    Palavras-Chave: polyamides; nanostructures; nanotubes; nanocomposites; mechanical properties; thermoplastics; inorganic polymers; tensile properties

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  • IPEN-DOC 25628

    MESQUITA, ANDERSON dos S. ; CAVALCANTE, IAN T. ; SILVA, LEONARDO G. de A. e . Electron beam effect on the thermal and mechanical properties analysis of DGEBA/EPDM compound. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 637-646, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_63

    Abstract: The aim of this work is to obtain, characterize and irradiate the DGEBA/EPDM compound and compare their thermal and mechanical properties with a non-irradiated DGEBA/EPDM compound. The DGEBA/EPDM compound may be used to cover other materials such as polymers and protect them against high thermal conditions and mechanical effort. The compounds have 0.0, 25.0 and 50.0 wt% of DGEBA. In addition, the compounds were irradiated at 30 and 60 kGy at a dose rate 22.41 kGy/s. The thermal properties (DMA and TGA) and mechanical analysis (tensile strength and elongation at break) were performed. In conclusion, the irradiated DGEBA/EPDM compounds may be used for several applications due to the improvement in their mechanical and thermal properties. Their properties are satisfactory for application that requires stronger material.

    Palavras-Chave: epoxides; ethylene propylene diene polymers; thermodynamic properties; electron beams

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  • IPEN-DOC 25627

    SALES, J.N. ; POVEDA, P.N.S. ; ORTIZ, A. ; VALENZUELA-DIAZ, F.R.; SILVA, L.A. . Effect study of the incorporation of the Green Lake clay in the polypropylene homopolymer properties. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 629-636, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_62

    Abstract: The advancement of technology has demanded the development of materials with increasingly lighter and more resistant properties. The development of nanocomposites first started in the mid-80s and contributed for obtaining materials with excellent properties. In this work, Green Lake clay was organophilized and incorporated into a commercial homopolymer polypropylene. The efficiency of organophilization was confirmed by water swelling analysis and, later, by Xray diffraction (XRD) analysis. Composites at 0.5, 1.0 and 2% by weight of clay/polypropylene were prepared by double screw extrusion. The properties of the composite were evaluated by means of Charpy impact resistance, tensile strength at rupture, thermogravimetric analysis (TGA). Crystallinity index was determined by differential scanning calorimetry (DSC). The organophilization processwas efficient, the thermogravimetric analysis showed that there was no decrease in the thermal stability of the composites when compared to pure polypropylene, and the results of the Charpy impact resistance were equivalent when compared to the commercial nucleant composites.

    Palavras-Chave: clays; crystal structure; charpy test; polypropylene; polymers

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  • IPEN-DOC 25626

    ROMANO, REBECA da S.G. ; OLIANI, WASHINGTON L. ; KUMAR, VIJAYA R.; PARRA, DUCLERC F. ; LUGAO, ADEMAR B. . Differences in properties of pro-degradant added PP and gamma-irradiated PP under environmental aging. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 591-603, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_59

    Abstract: Polypropylene (PP) is used for different sectors of the industry and in consequence produces a large amount of waste discarded at landfills causing serious environmental impacts. Controlled degradation of PP can be achieved by exposing the polymers to defined parameters, such as absorbed radiation dose, weather, oxygen, etc. The aim of this study was to compare two methods of accelerated degradation: gamma irradiation of PP 20 kGy and the incorporation of the commercial pro-degradant d2w® (1 wt%) in PP. Dumbbell samples were manufactured by the injection process and exposed to the environment aging for 90 days. Structural changes in PP macromolecules are created upon exposure to ionizing radiation such as main chain scission, crosslinking and peroxidation (in presence of air). Differential scanning calorimetry (DSC), thermogravimetric analysis (TG), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDX), X-ray fluorescence, Fourier-transformed infrared spectroscopy (FTIR) and mechanical tests characterized the samples. The samples previously irradiated, PP 20 kGy, after natural aging showed higher oxidation and presence of surface cracks than the PP d2w®. They also showed presence of carbonyl groups and decrease of melting temperature corroborating with oxo-degradation.

    Palavras-Chave: polypropylene; ionizing radiations; gamma radiation; residues; wastes; environment; aging; calorimetry

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  • IPEN-DOC 25625

    REIS, PEDRO R.S. ; SANTANA, JULYANA G. ; OLIVEIRA, RENE R. ; RANGARI, VIJAYA K.; LOURENÇO, FELIPE R.; MOURA, ESPERIDIANA A.B. . Development of biocomposite materials from biodegradable polymer and bio-hydroxyapatite derived from eggshells for biomedical applications. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 571-581, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_57

    Abstract: Nowadays, significant advances have been made in the development of biodegradable polymeric materials for biomedical applications. This study aims to prepare and characterize composite materials based on PLA/PBAT, a biodegradable polymer blend, reinforced with bio-hydroxyapatite (bio-HAp). First, bio-HAp was obtained from eggshell residues by the wet precipitation method. PLA/PBAT blend with 1.5 wt% of bio-HAp was prepared by melt extrusion and injection molding process. Part of composite samples was irradiated with gamma radiation dose of 25 kGy, at room temperature and presence of air. The effects of the bio-HAp addition into the biodegradable blend were investigated by mechanical tests, XRD, DSC, FESEM, and cytotoxicity “in vitro” analysis and the correlation between the properties was discussed. In addition, the microbiological tests were carried out at irradiated and non-irradiated composite samples in order to evaluate the efficiency of the radiation dose of 25 kGy at composite materials sterilization.

    Palavras-Chave: apatites; polyurethanes; polymers; biodegradation; antimitotic drugs; microorganisms; materials testing

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  • IPEN-DOC 25624

    MONTEIRO, ALEX S. ; BARREIRA, DAILI A.S. ; BARTOLOMEI, SUELLEN S. ; OLIVEIRA, RENE R. ; MOURA, ESPERIDIANA A.B. de . Comparative study of the use of rice husk ashes and graphite as fillers in polypropylene matrix composites. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 561-570, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_56

    Abstract: In recent years, carbonaceous materials have been widely studied for polymer composite applications due to its capability to improve the engineering properties of the polymeric matrix. Among various carbonaceous fillers, carbon nanotube, graphene, and graphite promise to be a suitable reinforcement of polymers. Rice husk ash (RHA), a large residue rich in carbon and silica produced by the burning of rice husk offers also an immense potential as a carbonaceous filler for polymer composites on account of its lowcost, lowdensity, high strength and elastic modulus, no health risks, and renewability. This work aims at studying the effects of RHA and graphite as fillers in polypropylene (PP) matrix composites. The composites PP/RHA and PP/graphite were produced by melting extrusion process. The materials obtained were subjected to mechanical tests, XRD, TG, and FEG-SEM analyses. Comparison studies between neat PP properties and its composites were carried out.

    Palavras-Chave: matrix materials; polypropylene; mechanical properties; thermodynamic properties; carbonaceous materials

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  • IPEN-DOC 25623

    MIRANDA, LEILA F. de; MUNHOZ JUNIOR, ANTONIO H.; MASSON, TEREZINHA J.; SILVA, LEONARDO G. de A. e ; FRIEHE, KARL. Characterization of antistatic packaging based on PET/rGO. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 523-534, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_52

    Abstract: Package for electronic components is one that protects an electronic or electrical device against electrostatic discharge. Traditionally, antistatic packages are produced with polystyrene (PS) or polypropylene (PP) filled with carbon black. Recently, studies have been carried out successfully for the application of polyethylene terephthalate (PET) filled with carbon black. This work aimed to obtain and characterize nanocomposites based on PET filled with reduced graphene oxide (rGO) and compare its physicochemical properties with PET filled with carbon black and PP filled with carbon black used in anti-static packaging. PET compounds containing 0.1; 0.3; 0.5 and 0.7wt% reduced graphene oxide were obtained by the modified Hummers process from the graphite and reduced with hydrazine. The thermomechanical, electrical and morphological properties of the obtained compounds were determined. The results showed that the addition of reduced graphene oxide to PET causes an increase in the melt flow index, also increase the tensile strength and electrical conductivity. The addition of reduced graphene oxide promotes the decrease in the hardness and thermal resistance of the obtained nanocomposites. Nanocomposites based on PET containing 0.5wt% and 0.7wt% reduced graphene oxide can be used in the handling, transport and storage of electronic components since their mechanical, thermal and resistivity properties are satisfactory for this purpose.

    Palavras-Chave: nanocomposites; polyethylene terephthalate; graphene; oxides; packaging

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  • IPEN-DOC 25622

    MONTEIRO, ALEX S. ; BARREIRA, DAILI A.S. ; SILVA, JAQUELINE S. ; OLIVEIRA, RENE R. ; VALENZUELA-DIAZ, FRANCISCO R.; MOURA, ESPERIDIANA A.B. . An investigation of mechanical and thermal properties of polypropylene reinforced with different clays. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 453-463, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_45

    Abstract: Nowadays, environmental awareness and an increasing concern with the greenhouse effect have increased the interest in composite materials containing at least one of the components from natural origin. Natural clays seem to be a good alternative because they are environmentally acceptable, naturally abundant minerals, and due to their ability to intercalate and exfoliate in the polymer matrix led to an improvement in mechanical, thermal and barrier properties, compared to the neat polymer. This work presents an investigation of the effects of incorporation of two different clays on mechanical and thermal properties of polypropylene (PP) matrix. PP with 1.5–3.0 wt% of the Cloisite® (commercial clay), and light green clay (noncommercial Brazilian clay), was prepared by melt extrusion process. The neat PP and its nanocomposites were characterized by mechanical tests, SEM, DSC, TGA and XRD analyses. In addition, clay characterization by XRD has also been carried out.

    Palavras-Chave: polypropylene; clays; tensile properties; thermal gravimetric analysis

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  • IPEN-DOC 25621

    BRIGGS, EXAMPLE; MOURA, ESPERIDIANA A.B. de ; FURUSAWA, HELIO A. ; COTRIM, MARYCEL E.B. ; OGUZIE, EMEKA E.; LUGAO, ADEMAR B. . Microplastics: a novel method for surfacewater sampling and sample extraction in Elechi Creek, Rivers State, Nigeria. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 269-281, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_27

    Abstract: The geometric increase in the production and exploitation of plastics worldwide has several advantages as well as disadvantages due to the mismanagement of plastic waste. These waste products find its way into the aquatic body. Microplastics are plastic particles with its longest diameter less than or equal to 5 mm. Their microscopic nature, irregular color and morphology have made their extraction from the buoyant organic materials problematic. This work documents for the first time, the sampling and sample extraction of microplastics in Nigeria. An optimized sampling and sample extraction protocol for surfacewaterwas developed. The extraction protocolwas developed in a laboratory study using a simulated sample that mimics the environmental sample (microplastics+organic materials). A micronized LDPE (<300 μm) was used for the study and yielded a percentage recovery rate of 82%. The digested microplastics which were subjected to SEM analysis showed a slight change in the surface morphology. Thereafter, the environmental sample was extracted using the developed laboratory protocol and a high positive result was achieved. This protocol improved NOAA’s method of extraction by excluding the use of microscope for the final extraction, which, of course, will yield a biased result. This was achieved by the addition of ethanol to the final solution.

    Palavras-Chave: plastics; pollutants; water pollution; microstructure; sampling; africa; rivers; separation processes; densimeters; plankton; nanoparticles; wet oxidation processes; peroxides; sample preparation; ethanol; scanning electron microscopy

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  • IPEN-DOC 25620

    ZAFALON, ANGELICA T. ; JUVINO, VINICIUS dos S. ; KOMATSU, LUIZ G.H. ; PARRA, DUCLERC F. ; LUGAO, ADEMAR ; SAMUEL, TEMESGEN; RANGARI, VIJAYA. Synthesis and characterization of PVP/CaCO3-Ag blend hydrogel by gamma irradiation: study of drug delivery system and antimicrobial activity. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 255-265, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_26

    Abstract: Chronic wounds are skin injuries with failed healing. They have become a public health problem that affects more than 2% of the population and the presence of bacteria resistances difficult of treatment. Pseudomonas aeruginosa is opportunist pathogens and the treatment is difficult and requires a long period of treatment. Hydrogels are structure polymeric tridimensional and biocompatible. They have been used as a controlled delivery system for treatment of topic infection. Studies have reported calcium carbonate and silver ion can improve the mechanical properties and biocide activity of hydrogel. Here in this study, hydrogels loaded CaCO3-Ag were prepared using poly (N-vinyl-2-pyrrolidone), poly (ethylene glycol), agar, calcium carbonate, silver nitrate followed gamma irradiation with 25 kGy dose. The gel fraction, behavior swelling and biocide action against P. aeruginosawas investigated. The degree of swelling of the hydrogel loaded CaCO3-Ag was 12% higher than the unloaded and exhibited antibacterial effects against P. aeruginosa and biofilm.

    Palavras-Chave: hydrogels; calcium carbonates; antimicrobial agents; gamma radiation; skin; wounds; healing; eggs; silver nitrates; bacteria

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  • IPEN-DOC 25619

    MARCHINI, LEONARDO G. ; PARRA, DUCLERC F. ; RANGARI, VIJAYA K.. Incorporation of silver nanoparticles in zinc oxide matrix in Polyester Thermoplastic Elastomer (TPE-E) aiming antibacterial activity. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); BAI, CHENGUANG (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); SPENA, PASQUALE R. (Ed.); GOSWAMI, RAMASIS (Ed.). Characterization of Minerals, Metals, and Materials. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 79-88, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-05749-7_9

    Abstract: The purpose of present study is to evaluate the antimicrobial potential of Thermoplastic Polyester Elastomer (TPE-E) incorporated with zinc oxide added with colloidal dispersion of metallic silver adsorbed on pyrogenic silica (AgNPs_ZnO). A combination of single screw extruder and hot press technique was used to fabricate these polymer nanocomposite films. These polymer nanocomposite films were prepared by mechanical mixing of 1% (w/w) of oil, anti-oxidant 0.05% (w/w), TPE-E granules 0.5% (w/w) and followed by single screw extruder to produce the pellets. As-prepared pellets were further melted for films in hot press technique. Antimicrobial activity was evaluated according to Japan Industrial Standard—JIS Z 2801 in TPE-E compounds against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). TPE-E samples containing additives 0.05 and 0.5% AgNPs_ZnO presented 75 and93%bactericidal reduction for Gram-negative bacteria Escherichia coli (E. coli) and 76 and 92% bactericidal activity reduction for Gram-positive bacteria Staphylococcus aureus (S. aureus), respectively.

    Palavras-Chave: silver; nanoparticles; antimicrobial agents; thermoplastics; polyesters; elastomers; zinc oxides

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  • IPEN-DOC 25566

    CORDEIRO, GUILHERME L. . Defect engineering in reduced graphene oxide toward advanced energy conversion. In: KAMBLE, GANESH S. (Ed.). Graphene Oxide: applications and opportunities. London: IntechOpen, 2018. p. 93-106, cap. 7. DOI: 10.5772/intechopen.77386

    Abstract: Defect engineering in reduced graphene oxide (rGO) for a smart design of fuel-cell supports has become an effective approach to improve the restricted two-dimensional (2D) mass and charge transfer and to boost the alcohol oxidation reaction. The present minireview describes recent trends across prominent characteristics of tailored reduced graphene oxides, which include but are not restricted to, engineered three-dimensional (3D) nanostructures for better mass transport, tuned electron/hole conduction for easier electrical transport, and hybridized surfaces for high electrocatalytic activity. Special focus fixes upon the experimental progress on defect engineering, from three-dimensional structure assembly to surface metal complexation and heteroatom doping to size-controlled defect formation. Given their crucial impact on reduced graphene oxide properties, controlled methods for synthesis, and processing offer considerable promise toward next-generation carbon nanomaterials for electrocatalysis.

    Palavras-Chave: graphene; oxides; defects; electrocatalysts; fuel cells

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  • IPEN-DOC 25520

    COLEMAN, CHRISTOPHER E.; MARKELOV, VLADIMIR A.; ROTH, MARIA; MAKAREVICIUS, VIDAS; HE, ZHANG; CHAKRAVARTTY, JAYANTA K.; ALVAREZ-HOLSTON, ANNA-MARIA; ALI, LIAQAT; RAMANATHAN, LALGUDI ; INOZEMTSEV, VICTOR. Is spent nuclear fuel immune from delayed hydride cracking during dry storage? An IAEA coordinated research project. In: COMSTOCK, ROBERT J. (Ed.); MOTTA, ARTHUR T. (Ed.). Zirconium in the Nuclear Industry: 18th International Symposium. West Conshohocken, PA: ASTM International, 2018. p. 1224-1251, (Selected Technical Papers, STP1597). DOI: 10.1520/STP159720160048

    Abstract: Delayed hydride cracking (DHC) has been responsible for cracking in zirconium alloy pressure tubes and fuel cladding and is a concern for spent fuel storage. For cracking to start, sufficient hydrogen must be present for hydride to form at a flaw tip and the local tensile stress must be sufficiently large to crack the hydride (a crack will not extend if the threshold in the stress intensity factor, KIH, is not exceeded. A high-temperature limit exists when the yield stress of the cladding alloy becomes too low to crack the hydride. In this paper we describe measurements of KIH and the crack growth rate, V, in unirradiated Zircaloy-4 fuel cladding containing approximately 130 ppm hydrogen in the cold-worked stress–relieved condition representing pressurized water reactors (PWRs) and pressurized heavy-water (PHWR) reactors. Four methods are used to evaluate KIH. The test specimen and fixture used in these methods was the pin-loading tension configuration. The test temperature ranged from 227 to 315 C. The mean value of KIH below 280 C had little temperature dependence; it was about 5.5 MPaHm in the PWR cladding and slightly higher at 7 MPaHm in the PHWR material. At higher test temperatures, KIH increased dramatically to more than 12 MPaHm, whereas the crack growth rate declined toward zero. This behavior suggests that unirradiated Zircaloy-4 fuel cladding is immune from DHC above about 320 C; this temperature may be increased to 360 C by irradiation. The implications for spent fuel storage are that during early storage when the temperatures are high, any flaw will not extend by DHC, whereas at low temperatures, after many years of storage, flaws would have to be very large, approaching through wall, before being extended by DHC. To date, spent nuclear fuel is not known to have failed by DHC during storage, confirming the inference.

    Palavras-Chave: zircaloy 4; cladding; dry storage; temperature dependence; immunity; hydrides; cracking

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  • IPEN-DOC 25502

    BENTO, RODRIGO T. ; PILLIS, MARINA F. . Titanium dioxide films for photocatalytic degradation of methyl orange dye. In: YANG, DONGFANG (Ed.). Titanium Dioxide: material for a sustainable environment. London: IntechOpen, 2018. p. 211-225, cap. 11. DOI: 10.5772/intechopen.75528

    Abstract: The aim of this work was to characterize and evaluate the influence of the thickness on the photocatalytic efficiency of titanium dioxide thin films on the degradation of methyl orange dye under UV light irradiation. The films of 280 and 468 nm thick were deposited on borosilicate substrates at 400°C by the MOCVD technique using titanium isoproxide IV as precursor. XRD analyses showed the formation of anatase-TiO2 phase. Crosssectional FE-SEM images show that the films presented a dense columnar structure and grown perpendicularly to the substrate surface. The photocatalytic activity of the catalysts was studied using UV-vis spectrophotometry The TiO2 film with 468 nm of thickness presented higher photocatalytic activity exhibiting 69% of dye degradation. The increase of grain size and thickness of the films promoted an improvement of photocatalytic efficiency.

    Palavras-Chave: titanium oxides; films; chemical vapor deposition; photocatalysis

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  • IPEN-DOC 25260

    CARVALHO FILHO, E.T.; MEDEIROS, J.T.N.; MARTINEZ, L.G. ; PINTO, V.C.. Study of error analysis and sources of uncertainty in the measurement of residual stresses by the X-Ray diffraction. In: SEEFELDT, MARC (Ed.). Residual Stresses. Millersville, PA, USA: Materials Research Forum LLC, 2018. p. 75-80, v. 6, (Materials Research Proceedings). DOI: 10.21741/9781945291890-13

    Abstract: The aim of this work is to analyze the sources of errors inherent to the residual stress measurement process by X-ray diffraction technique making an interlaboratory comparison to verify the reproducibility of the measurements. For this work were machined specimens with grinding finish, with polishing finish and to be a reference standard an iron powder was used To verify the deviations caused by the equipment, those specimens were positioned and with the same analysis condition, seven measurements were carried. To verify sample positioning errors, seven measurements were performed by positioning the sample at each measurement. To check geometry errors, measurements were repeated for the geometry Bragg Brentano and Parallel Beams. In order to verify the reproducibility of the method, the measurements were performed in two different laboratories and equipments. The results were statistically worked out and the quantification the type A errors that suggests that is a significant difference between the methods and orientation of grooves directions.

    Palavras-Chave: residual stresses; x-ray diffraction; measuring methods

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  • IPEN-DOC 25254

    FIORI, MARCIO A.; RIELLA, HUMBERTO G. ; KNOB, PAULO J.. Modal nuclear e a matriz energética na América do Sul. In: . Modal nuclear e a matriz energética global: contribuições e tendências do modal nuclear para a matriz energética global. Riga, Letônia: Novas Edições Acadêmicas, 2018. p. 163-207, cap. 6.

    Palavras-Chave: reactors; reactor technology; nuclear power plants; nuclear energy; power supplies; electric power; south america

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  • IPEN-DOC 25253

    FIORI, MARCIO A.; RIELLA, HUMBERTO G. ; KNOB, PAULO J.. A matriz energética dos principais países usuários do modal nuclear. In: . Modal nuclear e a matriz energética global: contribuições e tendências do modal nuclear para a matriz energética global. Riga, Letônia: Novas Edições Acadêmicas, 2018. p. 75-162, cap. 5.

    Palavras-Chave: reactors; reactor technology; nuclear power plants; nuclear energy; power supplies; electric power; france; china; usa; russian federation; japan; republic of korea

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  • IPEN-DOC 25252

    FIORI, MARCIO A.; RIELLA, HUMBERTO G. ; KNOB, PAULO J.. Reatores nucleares de Geração III e de Geração IV. In: . Modal nuclear e a matriz energética global: contribuições e tendências do modal nuclear para a matriz energética global. Riga, Letônia: Novas Edições Acadêmicas, 2018. p. 61-74, cap. 4.

    Palavras-Chave: reactors; pwr type reactors; westinghouse standard reactor; risk analysis; nuclear fuels

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  • IPEN-DOC 25251

    FIORI, MARCIO A.; RIELLA, HUMBERTO G. ; KNOB, PAULO J.. Os reatores nucleares. In: . Modal nuclear e a matriz energética global: contribuições e tendências do modal nuclear para a matriz energética global. Riga, Letônia: Novas Edições Acadêmicas, 2018. p. 37-60, cap. 3.

    Palavras-Chave: reactors; nuclear power plants; fission; nuclear fuels; uranium; moderators; refrigeration

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  • IPEN-DOC 25250

    FIORI, MARCIO A.; RIELLA, HUMBERTO G. ; DURAZZO, MICHELANGELO . Reatores nucleares - breve introdução. In: . Modal nuclear e a matriz energética global: contribuições e tendências do modal nuclear para a matriz energética global. Riga, Letônia: Novas Edições Acadêmicas, 2018. p. 26-36, cap. 2.

    Palavras-Chave: reactors; nuclear power plants; fission; historical aspects

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  • IPEN-DOC 25249

    FIORI, MARCIO A.; RIELLA, HUMBERTO G. ; CARVALHO, ELITA F.U. de . A energia nuclear no mundo – cenário geral na matriz energética global. In: . Modal nuclear e a matriz energética global: contribuições e tendências do modal nuclear para a matriz energética global. Riga, Letônia: Novas Edições Acadêmicas, 2018. p. 12-25, cap. 1.

    Palavras-Chave: reactors; reactor technology; nuclear power plants; nuclear energy; power supplies; electric power; global aspects; globalization

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  • IPEN-DOC 25248

    PIERETTI, EURICO F. ; RODAS, ANDREA C.D.; ANTUNES, RENATO A.; NEVES, MAURICIO D.M. . Evaluation of the biotribological behavior and cytotoxicity of laser-textured ISO 5832-1 stainless steel for use in orthopedic implants. In: JOHNSON, DAVID (Ed.). Tribology, Lubricants and Additives. London: IntechOpen, 2018. p. 65-76, cap. 4. DOI: 10.5772/intechopen.73140

    Abstract: This chapter evaluated the influence of laser texturing process on the tribological behavior of the ISO 5832-1 austenitic stainless steel (SS). The friction coefficient and wear were determined using ball-cratering wear tests. The laser texturing process was carried out with a nanosecond optical fiber ytterbium laser at four different pulse frequencies. Cytotoxicity tests were carried out to determine if laser texturing affects the biomaterial biocompatibility. For comparison reasons, pristine surfaces were also evaluated. The results indicated that the wear volume and friction coefficient were reduced after laser texturing. The samples were considered noncytotoxic according to the biocompatibility tests as the laser texturing process did not decrease cell’s viability.

    Palavras-Chave: antimitotic drugs; toxicity; stainless steels; tribology; lasers; texture; implants

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  • IPEN-DOC 25247

    PIERETTI, EURICO F. ; CORREA, OLANDIR V. ; PILLIS, MARINA F. ; NEVES, MAURICIO D.M. das . Electrochemical characterization of an optical fiber laser-treated biomaterial. In: PIGNATELLO, ROSARIO (Ed.); MUSUMECI, TERESA (Ed.). Biomaterials. London: IntechOpen, 2018. p. 75-85, cap. 5. DOI: 10.5772/intechopen.72653

    Abstract: The implant manufacturing process includes texturization to enhance its adhesion and marking the final products for their identification, long-term quality control and traceability. Marking is carried out after cleaning and prior to sterilization. These marks eventually can concentrate stress leading to premature failure. The marked areas are defective regions that affect the passive film formed on the metallic biomaterials used for implants favoring the onset of various corrosion types, such as pitting, crevice or fatigue. This study aims to evaluate the effect of a Yb optical fiber laser marking processes used for metallic implants on the localized corrosion resistance of the austenitic stainless steel ISO 5832-1. This is one of the most used materials for manufacturing implants. The electrochemical behavior of the marked areas obtained by this method was evaluated in a phosphate- buffered saline (PBS) solution with pH of 7.4 and the results were compared with unmarked samples. All tested surfaces were prepared according to the recommendations for the use in surgery. For localized corrosion resistance evaluation, electrochemical tests such as monitoring the open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and cyclic potentiodynamic polarization measurements were performed. The results showed that the laser marks affect the protector characteristics of the biomaterial’s passive film. Lower pitting resistance was associated to the laser marked areas.

    Palavras-Chave: biological repair; stainless steels; electrochemistry; lasers; optical fibers

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  • IPEN-DOC 25246

    MORENO, CAROLINA S. ; ROGERO, SIZUE O. ; GALISTEO JUNIOR, ANDRES J.; VIEIRA, DANIEL P. ; CRUZ, AUREA S.; SAKURABA, ROBERTO K.; WELTMAN, EDUARDO; ROGERO, JOSE R. . Analysis of the combined effects of resveratrol and radiation on lung cancer cells. In: WANG, JUE (Ed.). Top 25 Contributions on Cancer Research. Telangana, India: Avid Science, 2019. p. 2-27, cap. 17. (Avid Science Ebooks).

    Abstract: Mucoepidermoid lung carcinoma is frequently manifested by obstructive trachea symptoms. It is necessary to develop effective curative or palliative therapeutic strategies for treating mucoepidermoid lung carcinoma through administration of compounds that improve ionizing radiation treatment, thereby increasing the effects of the treatment on tumor cells while minimizing the effects on normal tissues surrounding the tumor cells. Resveratrol is a polyphenolic phytoalexin present in wines and several plants and has a broad spectrum of biological activities, including antioxidant and anticarcinogenic effects. The biological effects of ionizing radiation plus resveratrol have been examined in different types of cell in many studies. Here, we aimed to verify the effects of resveratrol on mucoepidermoid lung carcinoma cells NCI-H292 exposed to ionizing radiation. In vitro studies in NCI-H292 cell culture using neutral red uptake assays showed that the cytotoxicity index (IC50) of resveratrol was 401.5 μM, and the lethal dose 50 % (LD50) of ionizing radiation in the absence of resveratrol was 693 Gy. In vitro micronucleus assays were then performed to verify the genotoxic effects of resveratrol, and fluorescence assays were performed to evaluate the effects of resveratrol on the cell cycle, repair and injury processes, cellular necrosis, and apoptosis. The results demonstrated that 30 μM resveratrol promote injury on NCI-H292 cells after 24 h of irradiation. Therefore, this study provides results able to support in vitro future investigations about radiosensitive potential of resveratrol in lung cancer cells. There is a need to investigate compounds with potential to improve the local control of lung cancer promoted by radiation therapy. This way avoiding injuries to healthy cells.

    Palavras-Chave: dna damages; in vitro; ionizing radiations; lungs; lymphokines; neoplasms; polyphenols; radiation effects; radiosensitivity

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  • IPEN-DOC 25044

    MARTINS-JUNIOR, HELIO A. ; LEBRE, DANIEL T.; WANG, ALEXANDRE Y.; PIRES, MARIA A.F. ; BUSTILLOS, OSCAR V. . Residue analysis of glyphosate and Aminomethylphosphonic Acid (AMPA) in soybean using liquid chromatography coupled with Tandem Mass Spectrometry. In: NG, TZI B. (Ed.). Soybean - biochemistry, chemistry and physiology. Rijeka, Croatia: IntechOpen, 2011. p. 495-506, cap. 27. DOI: 10.5772/15817

    Palavras-Chave: pesticides; herbicides; glycine hispida; soybeans; chromatography; mass spectroscopy

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  • IPEN-DOC 25020

    CARDOSO, ELIZABETH C.L. ; OLIVEIRA, RENE R. ; MACHADO, GLAUSON A.F. ; MOURA, ESPERIDIANA A.B. . Study of flexible films prepared from PLA/PBAT blend and PLA E-beam irradiated as compatibilizing agent. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JLAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 121-129, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-51382-9_14

    Abstract: Plastics global annual production exceeds 250 million tons and more than 40% of the total plastic production is used as packaging materials. In recent years polymeric materials derived from biomass have received great attention due to scarce petroleum resources and environmental concerns. PLA is one of the most extensively studied bio-based and bio-compostable aliphatic polyesters; nevertheless, high brittleness and low toughness limits its application. Blending PLA with PBAT (Poly(butylene adipate-co-terephthalate)), an aliphatic-aromatic copolyester, was the solution found due to its high toughness and biodegradability. Differences between PLA and PBAT solubility parameter values lead to the formation of immiscible blends as well as reduction in their mechanical performance besides a poor morphology; so, 5% of pre-irradiated PLA and a previous compatibilized PLA/PBAT (EcovioTM) were added to PLA/PBAT blends in order to improve miscibility phases. Investigations were accomplished on phase morphology (SEM), mechanical properties, thermal behavior and X-ray diffractions (XRD).

    Palavras-Chave: lactic acid; polymers; butenes; electron beams; plastics; biodegradation

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  • IPEN-DOC 25010

    ACHUSIM-UDENKO, AMAUCHE C.; RENATA, COIDA D.S.; VALENZUELA-DIAZ, FRANCISCO R.; ONYEDIKA, GERALD O.; MOURA, ESPERIDIANA A.B. ; OGWUEGBU, MARTIN C.; VALENZUELA-DIAZ, GRACA. Preparation and characterization of clay exfoliation and vegetal fibre on properties of recycled low density polyethylene. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JLAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 429-437, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-51382-9_47

    Abstract: This work aims to incorporate Mgbee clay, vegetal fibre ( Costus afer ) in recycled low density polyethylene (rLDPE). The incorporation of clay and vegetal fibre in rLDPE was carried out using a twin screw extruder machine and the nano composites were obtained. The nano composites were characterized by the Young’s modules test, tensile tests, bending test, XRD, SEM, DSC, and TG and other properties evaluated. The results of morphological and thermal properties showed a good interaction between the clay, and rLDPE as compared to neat rLDPE.

    Palavras-Chave: polyethylenes; recycling; nanocomposites; fibers

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  • IPEN-DOC 25009

    COIADO, RENATA D.S. ; LAZO, GISELE D. ; OLIVEIRA, RENE R. ; RODRIGUES, RITA C.L.B.; MOURA, ESPERIDIANA A.B. . Polymer blend based on recycled polyethylene and ethylene vinyl acetate copolymers reinforced with natural fibers from agricultural wastes. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JIAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 689-697, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-51382-9_76

    Abstract: Agricultural residues, which are produced with large quantities annually throughout the world, may be used as reinforcement plastic to replace the wood and produce particleboard for application in the development of low cost construction elements and reduced environmental impact. The main aims of this study was to investigate the effects of agricultural wastes and glass residues addition on the properties of recycled-HDPE/EVA blend for use in particleboard manufacture. The recycled-HDPE/EVA blend reinforced with corncob fiber (15 wt%), coffee parchment (15 wt%) and glass residues (1 wt%) were processed by melt extrusion, using a twin screw extruder and injection molding machine to obtain specimen test samples. The samples were characterized by mechanical test, XRD, TG, DSC, and FE-SEM analysis to understand the nature of interaction between the fillers reinforcement and recycled-HDPE/EVA blend matrix and their properties were discussed.

    Palavras-Chave: polymers; plastics; agricultural wastes; glass; recycling; waste processing; mechanical tests

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  • IPEN-DOC 25004

    SANTANA, JULYANA G. ; ORTIZ, ANGEL ; OLIVEIRA, RENE R. ; RANGARI, VIJAY K.; GUVEN, OLGUN; MOURA, ESPERIDIANA A.B. . Mechanical, thermal, morphology and barrier properties of flexible film based on polyethylene-ethylene vinyl alcohol blend reinforced with graphene oxide. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JIAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 49-57, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-51382-9_7

    Abstract: Ethylene-vinyl alcohol (EVOH) copolymers are widely used in the food packaging industry as gas barrier properties to oxygen, organic solvents, and food aromas. EVOH is very sensitive to moisture and its gas barrier ability deteriorates in high relative humidity conditions. This work aims to prepare flexible films based on melt-blending high density polyethylene (HDPE) and ethylene-vinyl alcohol (HDPE/EVOH/EVA blend) reinforced with graphene oxide (GO). The HDPE/EVOH/EVA/GO flexible films were prepared by twin-screw extrusion and blown film extrusion processing. The flexible films samples were characterized by tensile tests, TG, DSC and FE-SEM analysis and the correlation between properties was discussed. In addition, the oxygen permeability tests were performed at 23 °C, 0 and 90% relative humidity using an OX-TRAN (MOCON Inc.).

    Palavras-Chave: packaging; food industry; alcohols; ethylene; copolymers

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  • IPEN-DOC 24670

    MERGULHAO, MARCELLO V. ; PODESTA, CARLOS E. ; NEVES, MAURICIO D.M. das . Perspective of additive manufacturing selective laser melting in Co-Cr-Mo alloy in the consolidation of dental prosthesis. In: DOBRZAŃSKI, LESZEK A. (Ed.). Biomaterials in Regenerative Medicine. London, UK: IntechOpen, 2018. p. 161-185, cap. 6. DOI: 10.5772/intechopen.69720

    Abstract: This chapter seeks to compare the properties of samples manufactured by additive manufacturing (AM) by the selective laser melting (SLM) technology and compare with the precision casting (PC) processes using the Co-Cr-Mo (ASTM F75) alloy to manufacture of dental prosthesis. This AM process can be manufactured three-dimensional models by means of a laser beam that completely melts particles of powder deposited layer by layer. However, it is still relevant to know the properties of: performance, dimensional, mechanical and microstructural of this laser melting process and compare with a convencional process. The results of mechanical evaluation showed that the SLM technique provides superior mechanical properties compared to those obtained by the PC technique. It is possible to verify that the consolidation by SLM technique results in lower presence of porosity than PC technique. In addition, PC samples presented a gross dendritic microstructure of casting process. Microstructural analysis of SLM samples results in a characteristic morphology of layer manufacturing with ultrafine grains and a high chemical homogeneity. In this way, the development of the present study evidenced to improve the manufacture of customized components (copings) using the SLM technology.

    Palavras-Chave: dentistry; prostheses; teeth; additives; lasers; melting; cobalt alloys; chromium alloys; molybdenum alloys; medical supplies; casting

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  • IPEN-DOC 24664

    SANTANA, JULYANA ; SEIXAS, MARCUS V. de S. ; RANGARI, VIJAY; VALENZUELA-DIAZ, FRANCISCO; WIEBECK, HELIO; MOURA, ESPERIDIANA . Influence of electron-beam irradiation on the properties of LDPE/EDPM blend foams. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); BROWN, ANDREW (Ed.); BAI, CHENGUANG (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. TMS. Cham, CZ, Switzerland: Springer International Publishing AG, 2018. p. 547-555, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-72484-3_58

    Abstract: Closed-cell polyethylene (PE) foams have been extensively used in many applications such as packaging, transportation, sports, construction, and agriculture because of their variety of properties including light weight, chemical resistance, thermal and electrical insulation. The objective of this study is to evaluate the influence of electron-beam irradiation on the properties of LDPE/EPDM blend foams. The LDPE/EPDM blend (80/20 wt%) were prepared by melt extrusion, using a twin-screw extruder machine. The foam structure of LDPE/EPDM blends was obtained by melt extrusion process, using a special single screw for foaming with 1.5 wt% of foaming agent as blowing agent. The foam samples were irradiated by electron-beam at radiation dose of 25, 50, 75 and 100 kGy and submitted to heating in an oven at 100 °C. The specimen tests samples of irradiated and non-irradiated foams were submitted to mechanical tests, DSC, TG analysis and density measurement.

    Palavras-Chave: polyethylenes; ethylene propylene diene polymers; density; irradiation; tensile properties

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  • IPEN-DOC 24663

    ARANTES, MARIANA M. ; SANTANA, JULYANA ; VALENZUELA-DIAZ, F.R.; RANGARI, VIJAY K.; GUVEN, OLGUN; MOURA, ESPERIDIANA A.B. . Development and characterization of recycled-HDPE/EVA foam reinforced with babassu coconut epicarp fiber residues. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); BROWN, ANDREW (Ed.); BAI, CHENGUANG (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. TMS. Cham, CZ, Switzerland: Springer International Publishing AG, 2018. p. 497-506, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-72484-3_52

    Abstract: Nowadays, the development of polymeric materials reinforced with residues of vegetal fibers is becoming popular for application in different segments, from the automotive to the civil construction and furniture industry. Vegetal fiber residues may be used as reinforcement of the recycled polymer materials, for instance, to produce foams to packaging or to thermal and acoustic isolation for green building application. This work is focused on the development and characterization of recycled-HDPE/EVA foam reinforced with fiber residues from babassu coconut epicarp. Firstly, composites based on recycled-HDPE/EVA blend reinforced with babassu coconut fiber were obtained by melting extrusion process. The composites were then extruded in a special single screw for foaming. The foam samples were submitted to mechanical tests, density measurement, DSC, TG, and FE-SEM analysis.

    Palavras-Chave: coconut palms; coconuts; fibers; polyethylenes; polymerization; polyvinyls; recycling

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  • IPEN-DOC 24662

    FRANCISCO, DANAE L. ; PAIVA, LUCILENE B. de; ALDEIA, WAGNER; LUGAO, ADEMAR B. ; MOURA, ESPERIDIANA A.B. . Characterization of non-covalently functionalized halloysite. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); BROWN, ANDREW (Ed.); BAI, CHENGUANG (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. TMS. Cham, CZ, Switzerland: Springer International Publishing AG, 2018. p. 317-323, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-72484-3_34

    Abstract: The inorganic nanotube halloysite (HNT) is a promising type of natural occurring filler for polymers. Its characteristics, such as high aspect ratio (10–50), small size, and high strength (elastic modulus—140 GPa) suggest that HNTs have a potential use in high-performance polymer nanocomposites. Compared to other nanoclays and nanosilica the relatively low content of hydroxyl groups on their surfaces makes HNTs relatively hydrophobic, although, sometimes, this is not sufficient for guaranty a good interfacial adhesion in composite systems. Further hydrophobic treatment is required to improve HNTs compatibility with polymer matrixes, maximizing interfacial interactions. In the present study, different percentages of EPB (2,2-(1,2-ethene diyldi-4,1-phenylene) bisbenzoxazole) was used to perform a non-covalent functionalization of halloysite, based on electron transfer interactions. The functionalization is characterized by specific surface area (BET), thermogravimetric analysis (TG) and water/toluene extraction experiment.

    Palavras-Chave: nanotubes; silicate minerals; clays; benzoxazoles; thermal gravimetric analysis; toluene; polymers

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  • IPEN-DOC 24661

    OIDE, MARIANE Y.T.; SATANA, JULYANA ; WELLEN, RENATE; VALENZUELA-DIAZ, FRANCISCO; GUVEN, OLGUN; MOURA, ESPERIDIANA . The influence of clay reinforcement on the properties of recycled polymer foams. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); BROWN, ANDREW (Ed.); BAI, CHENGUANG (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. TMS. Cham, CZ, Switzerland: Springer International Publishing AG, 2018. p. 703-712, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-72484-3_75

    Abstract: Poly [(ethylene)-co-(vinyl acetate)] (EVA) is a thermoplastic copolymer composed of randomly distributed polyethylene and polyvinyl acetate sequences within the molecular chain. EVA combines toughness with excellent flexibility, impact and puncture resistance. Because of these properties, this material is largely used for foam production as padding in equipment for various sports and as a shock absorber in sport’s shoes. This work aims to study the influence of clay reinforcement on the performance of recycled polymer foams. The blend containing recycled HDPE (high density polyethylene) and recycled EVA (70/30 wt%, respectively) reinforced with 2 wt% of clays were prepared by melt extrusion, using a twin-screw extruder to obtain the composites. The composites and foaming agent were fed into a special single screw extruder for foaming. The samples of HDPE/EVA/Clay foams were characterized by tensile test, Field Emission Scanning Electron Microscopy (FE-SEM), Thermogravimetric Analysis (TG), Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), density measurement and the correlation between the results was evaluated.

    Palavras-Chave: polyethylenes; polymerization; polyvinyls; clays; foams; nanocomposites

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  • IPEN-DOC 24660

    POVEDA, PATRICIA N.S. ; MOLARI, JULIANA A.; BRUNELLI, DEBORAH D.; SILVA, LEONARDO G.A. e . Study of different process additives applied to polypropylene. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); BROWN, ANDREW (Ed.); BAI, CHENGUANG (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. TMS. Cham, CZ, Switzerland: Springer International Publishing AG, 2018. p. 661-667, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-72484-3_70

    Abstract: There are several additives aimed on improving the processing characteristics as well as mechanical properties of the plastic materials. Being polypropylene is one of the main polymers used in the plastic processing industry due to its easy processability and application versatility, was chosen as the base resin for this study. Additives can aid the processing of polypropylene, either by promoting a better slip between the chains (lubricants), or by contributing to nucleation and crystallinity (nucleating). In this study, the raw materials copolymer polypropylene, lubricant (internal and external action), organic nucleating agent (metallic salt) and inorganic nucleating agent (metallic oxide) were considered. Mechanical tensile tests, Charpy impact and spiral flow to verify melt index were performed to characterize the samples with additives and standard (copolymer polypropylene). The interference of these additives with polymeric matrix was observed.

    Palavras-Chave: polypropylene; plastics; lubricants; additives; nucleation; crystallization

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  • IPEN-DOC 24659

    MESQUITA, ANDERSON dos S. ; SILVA, LEONARDO G. de A. e ; MIRANDA, LEILA F. de. Mechanical, thermal and electrical properties of polymer (Ethylene Terephthalate—PET) filled with carbon black. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); BROWN, ANDREW (Ed.); BAI, CHENGUANG (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. TMS. Cham, CZ, Switzerland: Springer International Publishing AG, 2018. p. 605-614, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-72484-3_64

    Abstract: This work seeks to understand if PET compounds with carbon black can be uses to replace polypropylene and polystyrene for anti-static packaging materials. PET compounds were fabricated containing 10.0; 11.0; 12.0 and 15.0 weight % of carbon black with a particle size 325 mesh. We determined the thermomechanical properties (Dynamic Mechanical Analysis—DMA, Tensile Properties, Fracture Toughness, and Hardness) and Electrical properties of the compounds. In conclusion the results show the compound based on PET filled with 15.0% carbon black might be used in the handling, transportation and storage of electronic components because their mechanical properties, thermal and resistivity are satisfactory for this purpose.

    Palavras-Chave: polymers; ethylene; polyethylene terephthalate; carbon black; thermal conductivity

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  • IPEN-DOC 24658

    OLIANI, WASHINGTON L. ; PARRA, DUCLERC F. ; RANGARI, VIJAYA K.; LINCOPAN, NILTON; LUGAO, ADEMAR B. . Irradiation influence on the properties of HMS-Polypropylene Clay/AgNPs nanocomposites. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); BROWN, ANDREW (Ed.); BAI, CHENGUANG (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. TMS. Cham, CZ, Switzerland: Springer International Publishing AG, 2018. p. 583-595, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-72484-3_62

    Abstract: Due to its versatility and low cost, polypropylene (PP) is one of the most widely used polymers in the world, consequently in research and development of new products. The polypropylene modified was prepared by gamma irradiation in acetylene at 12.5 kGy dose, technical polymer also known as high-melt-strength-polypropylene (HMSPP). It was mixed with montmorillonite (MMT) clay and silver nanoparticles (AgNPs) for bactericide activity. HMS-Polypropylene-clay -silver nanocomposites were manufactured using twin-screw extruders. Those materials were prepared by a melt mixing process via twin screw extrusion with a wide range of processing conditions. The polypropylene nanocomposites (PPNC) surfaces were exposed to gamma-radiation (60Co) source in presence of nitrogen as inert atmosphere at 1; 3; 5; 10; 20 and 50 kGy doses for modified the surfaces in order to enhance biocide activity. The samples surfaces were characterized by Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDX) and evaluated by determination of bactericide effects. The results indicate the formation of structures predominantly intercalated of HMSPP nanocomposite. Contact tests for antibacterial activity of the hybrid polymer were applied against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) bacteria. The irradiations on the samples surfaces were insufficient to promote activity on contact biocide tests.

    Palavras-Chave: nanocomposites; polypropylene; irradiation; gamma radiation; silver; clays; germicides; montmorillonite

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  • IPEN-DOC 24657

    ZAFALON, ANGELICA T. ; SANTOS, VINICIUS J. dos ; ESPOSITO, FERNANDA; LINCOPAN, NILTON; RANGARI, VIJAYA; LUGAO, ADEMAR B. ; PARRA, DUCLERC F. . Synthesis of polymeric hydrogel loaded with antibiotic drug for wound healing applications. In: LI, BOWEN (Ed.); LI, JIAN (Ed.); IKHMAYIES, SHADIA (Ed.); ZHANG, MINGMING (Ed.); KALAY, YUNUS E. (Ed.); CARPENTER, JOHN S. (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); BROWN, ANDREW (Ed.); BAI, CHENGUANG (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. TMS. Cham, CZ, Switzerland: Springer International Publishing AG., 2018. p. 165-176, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-72484-3_18

    Abstract: Polymeric hydrogels are natural or synthetic systems, which have gained interest due to their high biocompatibility with soft tissues. These types of hydrogels have been used for wound dressing as a drug delivery system. Here in this study the polymeric hydrogels based wound healing systems were prepared using poly (N-vinyl-2-pyrrolidone) (PVP), poly (ethylene glycol) (PEG), agar and neomycin drug followed by gamma irradiation to promote crosslinking and sterilization. The influence of irradiation process with 25 kGy dose was investigated. The gel fraction and maximum swelling were estimated using physicochemical methods and found about 95% gel fraction and 1100% swelling after 8 h of immersion. Neomycin released from hydrogel was carried out by Liquid Chromatography-Mass Spectrometry method and the drug concentration remained constant for 48 h. Hydrogel/neomycin exhibited antibacterial effects against Staphylococcus aureus. With these results, it can be inferred that hydrogel/neomycin is a suitable candidate for wound dressing.

    Palavras-Chave: hydrogels; polymers; antibiotics; drugs; wounds; neomycin; pvp; irradiation

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  • IPEN-DOC 24354

    AQUINO, AFONSO R. de . Multidisciplinaridade na área ambiental. In: NAVAL, LILIANA P. (Org.); PARENTE, TEMIS G. (Org.). Processos sociais, econômicos e ambientais de adaptação: o caso do Reservatório de Lajeado. Goiânia: Cânone Editorial, 2010. p. 11-20,

    Observação: Livro na íntegra disponível. Consulte a biblioteca do IPEN.

    Palavras-Chave: environment; education; educational tools; knowledge base; environmental policy

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  • IPEN-DOC 24497

    SELLERA, FABIO P.; NASCIMENTO, CRISTIANE L.; POGLIANI, FABIO C.; SABINO, CAETANO P. ; RIBEIRO, MARTHA S. . Future perspectives. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 209-222, DOI: 10.1007/978-3-319-45007-0_14

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    Abstract: Nowadays, it is clear that the activity of different photosensitizers (PSs) has a strong potential for moving photodynamic therapy (PDT) to clinical practice. Present technologies as dedicated light sources, new PSs, and nanotechnology are emerging strategies to promote PDT as a reliable, cost-effective, and safe approach to veterinary medicine. This chapter addresses an overview of emerging clinical applications and recent technologies to encourage veterinarians toward PDT.

    Palavras-Chave: veterinary medicine; photodynamic therapy; photosensitivity; diseases; therapeutic uses

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  • IPEN-DOC 24496

    SELLERA, FABIO P.; POGLIANI, FABIO C.; SABINO, CAETANO P. . Other practices in PDT. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 197-207, DOI: 10.1007/978-3-319-45007-0_13

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    Abstract: In addition to clinical PDT applications regarding antimicrobial and antineoplastic activity, photodynamic reactions have also been used in several other practices such as for fish tank decontamination, water treatment, antiangiogenic therapy for age-related macular degeneration, decontamination of surfaces, and even inactivation of pathogens for blood transfusion. Nowadays, not all potentials of photodynamic reactions are commercially available yet, but they definitely deserve to be highlighted in this chapter as alternative applications of photodynamic reactions in veterinary medicine.

    Palavras-Chave: veterinary medicine; photodynamic therapy; sterilization; water treatment; decontamination

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  • IPEN-DOC 24254

    SELLERA, FABIO P.; NASCIMENTO, CRISTIANE L.; RIBEIRO, MARTHA S. . Clinical applications of antimicrobial PDT. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 169-196, DOI: 10.1007/978-3-319-45007-0_12

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    Abstract: Antimicrobial photodynamic therapy (PDT) is a noninvasive, painless, and safe procedure that can be used on a wide range of diseases in clinical practice. Dermatology for dogs and cats is emerging as one of the main areas of interest for the application of this therapeutic approach; however, despite being a promising technique to treat various dermatological diseases, researchers and clinicians have made little use of this powerful tool. The farm animals’ medicine has evolved over the past few years, and the growing demand of consumers looking for absence of residues in animal products becomes essential in the search for alternatives to conventional treatments. Although the bulk of researches on PDT in veterinary medicine are to treat domestic animals, there is a great appeal for its clinical application in exotic, zoo, and wildlife medicine. In this chapter, we describe potential applications of PDT in veterinary clinical practice.

    Palavras-Chave: antimicrobial agents; methylene blue; skin diseases; veterinary medicine; photodynamic therapy

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  • IPEN-DOC 24253

    NASCIMENTO, CRISTIANE L.; SELLERA, FABIO P.; RIBEIRO, MARTHA S. . Basic studies in antimicrobial PDT. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 157-168, DOI: 10.1007/978-3-319-45007-0_11

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    Abstract: Microorganisms (MO) multiply rapidly and mutations that guarantee its survival forward to antimicrobials become prevalent in new populations. The inexorable rise of multidrug-resistant MO leads to an effort to search for alternative approaches that, hypothetically, MO could not easily develop resistance. Antimicrobial photodynamic therapy (PDT) is an effective alternative treatment for infected lesions in animals. The goal of the technique is to destroy a sufficient number of pathogenic MO to prevent recolonization and avoid unacceptable destruction of the host tissue. An important observation concerns the selectivity of the photosensitizer by microbial cells when compared to the host. This is because the photosensitizer (PS) uptake by host cells is slower than by MO. If the site of infection is irradiated after a short interval from the PS application (minutes), the damage to host tissue is minimized. Currently, antimicrobial PDT has proven its effectiveness against bacteria, virus, fungi, and parasites. This chapter reviews the literature regarding antimicrobial PDT especially for veterinary medicine.

    Palavras-Chave: antimicrobial agents; methylene blue; cattle; skin diseases; infectious diseases

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  • IPEN-DOC 24464

    NASCIMENTO, CRISTIANE L.; SELLERA, FABIO P.; RIBEIRO, MARTHA S. . How to enter PDT in clinical practice?. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 111-123, DOI: 10.1007/978-3-319-45007-0_8

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    Abstract: The photodynamic therapy stands out, not only for the few adverse effects to the veterinary patient but also for presenting environmental safety, not inducing microbial resistance and reducing generation of residual drugs on products intended for human consumption. After understanding the full potential of this new therapeutic modality through the previous chapters, the purpose of this chapter is to cover the main aspects to be considered by veterinarians to move PDT to clinical practice. It will be presented how the light source and photosensitizers should be chosen as well as the application modes for both antimicrobial and cancer PDT. Biosafety will also be addressed.

    Palavras-Chave: veterinary medicine; photodynamic therapy; antimicrobial agents; light sources

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  • IPEN-DOC 24463

    RIBEIRO, MARTHA S. ; SABINO, CAETANO P. . Multimodality dosimetry. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 93-109, DOI: 10.1007/978-3-319-45007-0_7

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    Abstract: PDT requires a multimodality approach for dosimetry because it works based on three essential components: light, photosensitizer, and molecular oxygen. Since these components are found in variable amounts inside target cells, PDT dosimetry is rather intricate. This chapter intends to address, with little mathematical complexity, the physical and chemical quantities that are most relevant for light and photosensitizer dosimetry as well as to present basic aspects of oxygen supply to achieve successful PDT interventions.

    Palavras-Chave: veterinary medicine; photodynamic therapy; dosimetry; light sources; lasers

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  • IPEN-DOC 24645

    HAMBLIN, MICHAEL R.; SABINO, CAETANO P. . Systemic effects. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 73-91, DOI: 10.1007/978-3-319-45007-0_6

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    Abstract: Photodynamic therapy (PDT) is a clinically approved practice for treatment of cancer and infectious diseases. PDT involves systemic or topical administration of a photosensitizer (PS), followed by irradiation of the target area with light of a wavelength matching the absorption band of the PS. In the presence of oxygen, photochemical reactions trigger the production of reactive oxygen species and, consequently, cell death by oxidative stress. Besides causing direct cytotoxicity to tumor cells, PDT induces destruction of the tumor vasculature releasing pro-inflammatory cytokines. Current literature supports that PDT is able to affect both the innate and adaptive responses of the immune system. In addition, PDT-induced adaptive immunity may attack distant untreated tumor cells and lead to development of antitumor memory immunity, which can potentially avoid the cancer relapse. Conversely, pro-inflammatory activity of PDT can also collaborate to resolve local infections since more neutrophils are recruited to the infected region.

    Palavras-Chave: veterinary medicine; animals; photodynamic therapy; tumor cells; neoplasms; immunity

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  • IPEN-DOC 24458

    SABINO, CAETANO P. ; HAMBLIN, MICHAEL R.. Cellular damage. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 57-72, DOI: 10.1007/978-3-319-45007-0_5

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    Abstract: Classical pharmacology is normally concerned with defined molecular structures that can bind to specific proteins and either inhibit or enhance the protein function to achieve some biological response with therapeutic benefit. In photodynamic therapy (PDT) context, we rarely rely on such target specificity to achieve therapeutic success. Although some recent photosensitizers have been functionalized with target-specific molecules, such as antibodies, to recognize specific cells and enhance therapy specificity, ROS produced inside the cell will damage all susceptible molecules within the diffusion radius. According to the previous chapter, both hydroxyl radicals and singlet oxygen are highly reactive toward most of the abundant biological molecules contained in cells. In this chapter we discuss how such capacity of PDT to provoke multiple sites of molecular damages in the cellular context is associated with the phototoxicity produced. Also, we discuss how cellular antioxidant and xenobiotic defenses can influence on cellular tolerance against photodynamic inactivation.

    Palavras-Chave: hydroxyl radicals; animal cells; molecules; molecular structure; damage

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  • IPEN-DOC 24457

    SABINO, CAETANO P. ; HAMBLIN, MICHAEL R.. Molecular damage. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 45-56, DOI: 10.1007/978-3-319-45007-0_4

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    Abstract: Photodynamic therapy (PDT) rapidly produces large amounts of reactive oxygen species (ROS) to induce death of photosensitized cells. As previously described in Chap. 2, excited photosensitizer (PS) molecules can either donate electrons (type 1) or energy (type 2) to ground-state oxygen to produce superoxide radicals (O2•−) or singlet oxygen (1O2). Each type of ROS has characteristic chemical reactivity and reacts with different types of chemical bonds present in biomolecules and, consequently, will lead to different types of cell damage. Once again, what determines the mechanism of cell death directly depends on both: the PS localization site within the cell and total extent of oxidative stress produced during therapy (i.e., light dosimetry and efficiency of ROS generation). To elucidate the mechanisms of photooxidative damage and the consequent biological effects, this chapter will cover the most relevant chemical reactions related to oxidative damage caused by 1O2 and free radicals.

    Palavras-Chave: veterinary medicine; photodynamic therapy; oxygen; molecular structure; photosensitivity

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  • IPEN-DOC 24453

    HAMBLIN, MICHAEL R.; SABINO, CAETANO P. . Photosensitizers. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 25-43, DOI: 10.1007/978-3-319-45007-0_3

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    Abstract: Photodynamic therapy (PDT) was discovered over 100 years ago when it was observed that certain dyes could kill microorganisms when exposed to light in the presence of oxygen. Since those early days, PDT has mainly been developed as a cancer therapy with regulatory approvals and clinical trials steadily accumulating for different types of cancer and different photosensitizer structures. A very important milestone for PDT was the introduction of 5-aminolevulinic acid (ALA), which functions as a prodrug to induce endogenous porphyrin biosynthesis that acts as an endogenous photosensitizer produced by our cells. PDT with ALA and its derivatives have become mainstays of the clinical dermatologist’s practice covering everything from skin cancer, premalignant lesions, acne, and skin rejuvenation. Another milestone in PDT development was the realization that PDT may also be used as an effective antimicrobial modality and a potential treatment for localized infections. To some extent, this means that PDT has gone full circle and returned to its roots from when it was first discovered in 1900. In this chapter we discuss, in a contextualized fashion, what are the expected characteristics of an ideal photosensitizer and which are the main molecular frameworks used for development of synthetic, natural, and nanostructured photosensitizers.

    Palavras-Chave: photosensitivity; photodynamic therapy; nanostructures; porphyrins

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  • IPEN-DOC 24452

    SABINO, CAETANO P. ; HAMBLIN, MICHAEL R.. Photophysical and photochemical mechanisms. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 11-23, DOI: 10.1007/978-3-319-45007-0_2

    Observação: Livro na íntegra disponível. Consulte a biblioteca do IPEN.

    Abstract: Photodynamic therapy (PDT) harnesses the power of light in an elegant method to produce cytotoxic agents in a spatially and temporally controlled manner and specifically damage target cells and tissues. For photodynamic reactions to occur, the PS molecule must absorb at least one photon to be promoted to a sufficiently long-lived excited state and then induce photodynamic reactions in an oxygenated environment. Such properties guarantee that PDT has an exceptionally broad action spectrum against tumors or pathogens, and resistance occurrence is restricted to only a few exceptions that can be avoided using simple strategies. To fully understand the intricacies of the mechanisms by which PDT acts, it is clear that one must take advantage of all the basic sciences (e.g., physics, chemistry, and biology). In fact, such conceptual complexity still maintains constant scientific investigations to deeply understand the molecular basis of PDT. Curiously, it might also be one of the reasons to explain why this hundred-year-old technique is still not generally applied in clinics or taught in standard courses of pharmacology. In this chapter, we will attempt to use a multidisciplinary approach, with simple technical language and a minimum of mathematics and equations, to allow any student with minimal training in basic sciences to understand all the fundamental mechanisms of PDT.

    Palavras-Chave: photochemical reactions; photodynamic therapy; electromagnetic radiation; radiation sources

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  • IPEN-DOC 24448

    SELLERA, FABIO P.; SABINO, CAETANO P. ; HAMBLIN, MICHAEL R.. History of PDT. In: SELLERA, FABIO P. (Ed.); NASCIMENTO, CRISTIANE L. (Ed.); RIBEIRO, MARTHA S. (Ed.). Photodynamic therapy in veterinary medicine: from basics to clinical practice. Gewerbestrasse, Switzerland: Springer, 2016. p. 1-10, DOI: 10.1007/978-3-319-45007-0_1

    Observação: Livro na íntegra disponível. Consulte a biblioteca do IPEN.

    Abstract: This chapter presents the brightest historical milestones behind the development of photodynamic therapy (PDT). We initially present how photodynamic reactions were first observed by scientists from three different countries in the beginning of the twentieth century. Oskar Raab, from Germany, observed by accident that protozoan cells stained with fluorescent dyes were killed upon illumination, while Prime, in France, reported that human subjects who ingested also fluorescent dyes for an experimental treatment of neurological diseases developed severe erythema after short exposure to sunlight. Niels Finsen, from Denmark, was awarded with the third Nobel Prize of Medicine in the history for the development of light-based treatments for skin infections. Following, we describe how PDT slowly evolved until the 1960–1970s when new generations of less toxic photosensitizers were developed for diagnosis and treatment of solid tumors. Only then PDT really became a hot scientific area that began to attract many researchers to the field. We also describe the first huge medical and economic impact that PDT as the first effective treatment for age-related macular degeneration, the leading cause of adult blindness in the world. Finally, we go through the main discoveries in veterinary medicine over the past years for the treatment of localized tumors and infections in diverse animal species.

    Palavras-Chave: photodynamic therapy; historical aspects; ultraviolet radiation; therapeutic uses

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  • IPEN-DOC 24445

    VASQUEZ, P. . Sources and equipment in radiation technologies. In: . Uses of ionizing radiation for tangible cultural heritage conservation. Vienna, Austria: International Atomic Energy Agency, 2017. p. 51-59, (IAEA Radiation Technology Series, 6).

    Palavras-Chave: gamma radiation; processing; electron beams

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  • IPEN-DOC 24247

    VASQUEZ, P. . Fundamentals of radiation processing technology. In: . Uses of ionizing radiation for tangible cultural heritage conservation. Vienna, Austria: International Atomic Energy Agency, 2017. p. 43-50, (IAEA Radiation Technology Series, 6).

    Palavras-Chave: radiations; processing; ionizing radiations; dosimetry; dose rates; irradiation procedures; radiation chemistry; radiation doses

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  • IPEN-DOC 24331

    PRIETO, KATIA R.; ECHAIDE-AQUINO, FRANCISCO; HUERTA-ROBLES, AURORA; VALERIO, HELLEN P.; MACEDO-RAYGOZA, GLORIA; PRADO, FERNANDA M.; MEDEIROS, MARISA H.G.; BRITO, HERMI F.; SILVA, IVAN G.N. da; FELINTO, MARIA C.F.C. ; WHITE JUNIOR, JAMES F.; DI MASCIO, PAOLO; BELTRAN-GARCIA, MIGUEL J.. Endophytic bacteria and rare earth elements; promising candidates for nutrient use efficiency in plants. In: HOSSAIN, MOHAMMAD A. (Ed.); KAMIYA, TAKEHIRO (Ed.); BURRITT, DAVID J. (Ed.); TRAN, LAM-SON P. (Ed.); FUJIWARA, TORU (Ed.). Plant Macronutrient Use Efficiency: molecular and genomic perspectives in crop plants. London, United Kingdom: Academic Press, 2017. p. 285-306, DOI: 10.1016/B978-0-12-811308-0.00016-8

    Palavras-Chave: agriculture; feeding; fertilizers; soil conservation; resource conservation; environmental protection; nitrogen; rare earths

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  • IPEN-DOC 24356

    TEOTONIO, ERCULES E.S.; RODRIGUES, LUCAS C.V.; BRITO, HERMI F.; FELINTO, MARIA C.F.C. ; MALTA, OSCAR M.L.. Photophysical and structural properties of rare-earth phenolate compounds. In: ZABICKY, JACOB (Ed.); RAPPOPORT, ZVI (Colab.); LIEBMAN, JOEL F. (Colab.); MAREK, ILAN (Colab.); PATAI, SAUL (Colab.). The Chemistry of Metal Phenolates. Chichester, UK: Wiley & Sons, 2017. p. 1-64, v. 2, cap. 4. (Patai's Chemistry of Functional Groups). DOI: 10.1002/9780470682531.pat0908

    Palavras-Chave: phenols; phenolates; rare earths; crystal structure

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  • IPEN-DOC 24234

    ROMANO, REBECA S.G. ; OLIANI, WASHINGTON L. ; PARRA, DUCLERC F. ; LUGAO, ADEMAR B. . Effects of environmental aging in polypropylene obtained by injection molding. In: MAAZOUZ, ABDERRAHIM (Ed.). INTERNATIONAL CONFERENCE OF THE POLYMER PROCESSING SOCIETY, 32nd. Melville, NY: AIP Publishing, 2017. p. 140001-1 - 140001-5, (AIP Conference Proceedings 1914).

    Notas de conteúdo: Conference date: July 25-29, 2016. Location: Lyon, France

    Abstract: UV light, heat, and pollutants can interact with Polypropylene (PP) molecules, mainly with the tertiary carbon producing free radicals which can react with oxygen producing changes in its properties. PP has outstanding chemical and physical properties, and a good processability at very low market price. In addition PP is extensively used for manufacturing various kinds of products, however due to its large scale consumption a lot of waste is generated at the end of their life cycle to the environment with low rate degradation. This study has the objective of comparing the environmental exposure of PP (spheres) neat and PP (spheres) irradiated with 20 kGy. Dumbbell samples were manufactured by injection molding and exposed to the environment during 90 days. Another one set was exposed to gamma irradiation at 20 kGy total dose and exposed at the same conditions. The samples were characterized by Mechanical Testing, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and Differential Scanning Calorimetry (DSC). The dumbbell samples PP 20 kGy, after environmental aging, showed oxidation with presence of surface cracks more intensely than the PP spheres neat.

    Palavras-Chave: gamma radiation; polypropylene; environmental exposure; environment; aging

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  • IPEN-DOC 23238

    OLIANI, WASHINGTON L. ; FERMINO, DANILO M.; KOMATSU, LUIZ G.H. ; LUGAO, ADEMAR B. ; RANGARI, VIJAYA K.; LINCOPAN, NILTON; PARRA, DUCLERC F. . Preparation and characterization of polyethylene nanocomposites with clay and silver nanoparticles. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JIAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 709-718, (The Minerals, Metals & Materials Series).

    Abstract: Polyethylene is widely used for packing applications. Different grades of polyethylene, LLDPE and LDPE play a major role in the film blowing industry. The use of nanoclay in polymer matrices (non-polar) requires the use of a compatibilizer agent, ethylene graft maleic anhydride copolymer (PE-g-MA), which acts as a bridge for nanoclay-matrix-interaction. In our study, blown films of LLDPE, LDPE, and their blends were produced using a twin screw extruder. The combination of PEs as matrix, montmorillonite (MMT) and silver nanoparticles (AgNPs) intended to improve mechanical and thermal properties. Nanocomposites films with 1 wt% of montmorillonite and 0.5–1.0 wt% silver nanoparticles were prepared by blow extrusion and evaluated. Nanoclay intercalation/exfoliation degree was investigated by X-ray diffraction spectroscopy (XRD) and scanning electron microscopy (SEM). Mechanical and thermal properties were evaluated. The results showed optimum dispersion at intercalation/exfoliation levels for polyethylene nanocomposite (PENC), slight increasing in mechanical and especially improvement in thermal properties.

    Palavras-Chave: polyethylenes; silver; nanoparticles; films; montmorillonite; clays

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  • IPEN-DOC 23237

    OLIANI, WASHINGTON L. ; PARRA, DUCLERC F. ; LIMA, LUIS F.C.P. ; OTAGURO, HARUMI; FERRETO, HELIO F.R. ; LUGAO, ADEMAR B. . Contribution to the β relaxation study of the HDPE, LDPE and LLDPE. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JIAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 617-626, (The Minerals, Metals & Materials Series).

    Abstract: The activation of three polyethylenes, the low density, the high density and the linear low density polyethylene, was determined by means of dynamic mechanical analysis (DMA). Storage modulus and tan δ spectra were obtained as a function of the temperature from −60 to 50 °C with a heating rate of 2° min−1 at frequencies of 1, 2 and 5 Hz and measurement strain amplitude of 10−5. In the tan δ spectra, a small peak in the β region of the three polyethylenes was found and substantiated by subtracting the growing exponential background. This procedure was based on a model that associates the dislocation motion on metals under cyclic stress to vibrating strings and considering the same for the polymeric chains. For the determination of the activation energy we have utilized the frequency versus the reciprocal of the absolute temperature peak of the tan δ. The values obtained for the three polyethylenes, the low density, the high density and the linear low density were, 362 ± 12, 266 ± 9 and 197 ± 6 kJ mol−1, respectively, which were compared with those presented in the literature.

    Palavras-Chave: polyethylenes; relaxation; activation energy; density

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  • IPEN-DOC 23234

    MAIHARA, VERA A. ; FAVARO, DEBORAH I.T. ; BARBOSA JUNIOR, FERNANDO. Elementos Tóxicos. In: COUTINHO, WALTER L. (Ed.); COZZOLINO, SILVIA M.F. (Org.). Biodisponibilidade de nutrientes. 5 ed. Barueri, SP: Manole, 2016. p. 921-956,

    Palavras-Chave: pollution; toxic materials; food industry; feeding; food chains; environmental exposure pathway; toxic substances control acts; organic compounds; chemical spills

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  • IPEN-DOC 23942

    MOREIRA, JOSE R.S.; GRIMONI, JOSE A.B.; ROCHA, MARCELO da S. . Energia e panorama energético. In: MOREIRA, JOSE R.S. (Org.). Energias renováveis, geração distribuída e eficiência energética. Rio de Janeiro, RJ: LTC, 2017. p. 1-13,

    Palavras-Chave: energy sources; electric power; electric power industry; power generation; solar energy; renewable energy sources; power transmission

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  • IPEN-DOC 23944

    COTRIM, MARYCEL E.B. ; MARTINS, ELAINE A.J. ; FURUSAWA, HELIO A. ; SHIHOMATSU, HELENA M. ; MONTEIRO, LUCILENA R. ; LEBRE, DANIEL T. ; OTOMO, JULIANA I. ; SILVA, LARISSA L. da ; ADAME, GISELE ; BRITO, CARLOS F. de ; PEREIRA, KAROLINE de P. ; SILVA, JULIANA C. da ; SILVA, DOUGLAS B. da ; FAUSTINO, MAINARA G. ; MARQUES, JOYCE R. ; STELLATO, THAMIRIS B. ; SILVA, TATIANE B. de S.C. da ; PIRES, MARIA A.F. . Qualidade ecológica da Represa Guarapiranga: água e sedimentos superficiais: multitraçadores ambientais - metais, elementos-traço, interferentes endócrinos, HPAS e fármacos. In: MOURA, RAILSON (Ed.); BICUDO, CARLOS E. de M. (Org.); BICUDO, DENISE de C. (Org.). 100 anos da represa Guarapiranga: lições e desafios. Curitiba: CRV, 2017. p. 309-382,

    Palavras-Chave: water reservoirs; sediments; ecological concentration; water pollution; toxic materials

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  • IPEN-DOC 23941

    PIRES, MARIA A.F. ; MARTINS, ELAINE A.J. ; MONTEIRO, LUCILENA R. ; BRITO, CARLOS F. de ; SILVA, DOUGLAS B. da ; PEREIRA, KAROLINE de P. ; SILVA, JULIANA C. da ; MUCHON, GABRIELA ; JESUS, TATIANE A. de; COTRIM, MARYCEL E.B. . Principais contaminantes na Represa Guarapiranga: condições pretéritas e recentes. In: MOURA, RAILSON (Ed.); BICUDO, CARLOS E. de M. (Org.); BICUDO, DENISE de C. (Org.). 100 anos da represa Guarapiranga: lições e desafios. Curitiba: CRV, 2017. p. 281-307,

    Palavras-Chave: water reservoirs; chemical analysis; sediments; elements; trace amounts

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  • IPEN-DOC 23925

    SUZIN E SILVA, MIRNA M. ; CARVALHO, ELITA F.U. de ; RIELLA, HUMBERTO G. . Tratamento oxidativo em águas residuais da mineração de urânio com oxidação avançada de ozônio. In: PINHEIRO, ALEX G. (Colab.); SILVA, CARLA M. (Colab.); MENDES, ERLON (Colab.); WAJC, ISAC M. (Colab.); YAMANAKA, MARCOS H. (Colab.); QUADRI, MARINTHO B. (Colab.); SUZIN E SILVA, MIRNA M. (Colab.); GUIMARAES, NATALIA R. (Colab.); MOREIRA JUNIOR, PAULO F. (Colab.); MANFIOLETTI, SUELEN Z. (Colab.)ANGIOLETTO, ELIDIO (Coord.); CARVALHO, ELITA F.U. de (Coord.); BIAZINI FILHO, FRANCISCO L. (Coord.); LAGE FILHO, FREDERICO A. (Coord.); RIELLA, HUMBERTO G. (Coord.); SANTOS, IVAN (Coord.); DEPINTOR, JOSE C. (Coord.); BOSCOV, MARIA E.G. (Coord.); MENASCE, SAMY (Coord.); . Ozônio na recuperação de solos e recursos hídricos contaminados por mineração. Criciúma, SC: UNESC, 2016. p. 71-109,

    Observação: Livro na íntegra disponível. Consulte a biblioteca do IPEN.

    Palavras-Chave: mining; waste water; environmental impacts; ground water; oxidation; uranium mines; manganese; ozone; removal; waste processing

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  • IPEN-DOC 23894

    BARROS, LIVIA F. ; PECEQUILO, BRIGITTE R.S. . The influence of environmental aspects in the variation of natural radioactivity levels in selected brazilian beach sand samples. In: CESSA, MARGARET (Ed.). Beaches: erosion, management practices and environmental implications. Hauppauge, Nova Iorque, EUA: Nova Science Publishers, 2014. p. 73-99, (Environmental Health - Physical, Chemical and Biological Factors).

    Abstract: At beaches, environmental implications added to shoreline erosion and artificial interventions on native structure may alter the concentration of the natural radionuclides in certain regions of the coast. In this work, eleven locations at Camburi beach, known to be a naturally high background region, were studied in 2011. The influence of environmental aspects, as geology, average temperatures, variations of the height of the tides and the rainfall levels were related with the variation of 226Ra, 232Th and 40K activities concentrations, during the year 2011 and annual effective dose were evaluated from the 226Ra, 232Th and 40K sands activities concentrations. Sand samples were monthly collected during 2011, dried, sealed in standard 100 mL HPDE polyethylene flasks and measured by high resolution gamma spectrometry after a 4 weeks in-growth period. The results, considering samples gamma-rays self-attenuation, show activities concentrations in the range from 4 Bq kg-1 to 1380 Bq kg-1 for 226Ra, 9 Bq kg-1 to 7453 Bq kg-1 for 232Th, and 6 Bq kg-1 to 504 Bq kg-1 for 40K. The absorbed dose rate (D) in outdoor air values laid from 9 nGy.h-1 to 5160 nGy.h-1 .The annual effective dose values for the sand samples considering a daily exposure of 24 hours all year round laid from 0.05 mSv.y-1 to 31.64 mSv.y-1. The annual effective dose values for the sand samples considering daily exposure of one hour all year round laid from 0.002 mSv.y-1 to 1.318 mSv.y-1.The annual effective dose (E) for the beach collection points for a resident of Vitoria city, with one hour daily exposure all year round by collection point laid from 0.003 mSv.y-1 to 0.232 mSv.y-1. The annual effective dose (E) for the collection points from Camburi beach for a tourist with 8 hours daily exposure on january, july or both, laid from 0.004 mSv.y-1 to 0.446 mSv.y-1. For a resident of Vitoria city and for a tourist, in the conditions of exposure of this work, all values of E are lower than the limit of 1 mSv y-1, recommended for ICRP 60 for the general public. In some months of the year 2011, low average temperatures, low rainfall levels and low variations of the height of the tides can be related with high 226Ra, 232Th and 40K activities concentrations. In April and in October, high rainfall levels and high variations of the height of the tides can be related with low 226Ra, 232Th and 40K activities concentrations.

    Palavras-Chave: natural radioactivity; environment; ecosystems; radioecological concentration; coastal regions; sand; sea bed

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  • IPEN-DOC 23710

    MUCCILLO, R. ; MUCCILLO, E.N.S. ; FONSECA, F.C. ; FLORIO, D.Z. de. Low temperature ac electric field-assisted sintering of unitary anode-supported solid oxide fuel cell. In: PFEIFER, THOMAS (Ed.); MATYAS, JOSEF (Ed.); BALAYA, PALANI (Ed.); SINGH, DILEEP (Ed.); WEI, JOHN S. (Ed.). Ceramics for Energy Conversion, Storage, and Distribution Systems: ceramic transactions. v. 255. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016.

    Abstract: Unitary planar solid oxide fuel cells (cathode La0.84Sr0.16MnO3 thin film/solid electrolyte ZrO2:8 mol% Y2O3 thin film/anode ZrO2:8 mol% Y2O3/NiO 55/45 vol.% 5.0 x 5.0 x 1.5 mm3 thick pellet) were prepared by electric field-assisted sintering. The application of multiple 300 V.cm-1 pulses at 1 kHz with 1-5 A limiting current at 1100 oC for 10 min produced single SOFC devices with dense electrolyte and porous anode and cathode. The electrical conductivity of the cells, measured at 590 oC by the impedance spectroscopy technique in the 5 Hz-13 MHz range in a HP4192A impedance analyzer, showed the increase in the electrical conductivity in comparison with the conventionally sintered cell. The microstructure of cross sections of the cells was observed in a scanning electron microscope. The images of the electric field-assisted sintered cells showed dense electrolyte and porous anode and cathode. Joule heating, provoked by the AC electric current pulses resulting from the application of the AC voltage, promoted NiO reduction at the anode, detected by EDX analysis in its intergranular region. L/L0 dilatometry shrinkage curves, J x t electric current pulses, Z'() x Z''() impedance plots and scanning electron microscopy micrographs show how anode-electrolyte-cathode ceramic cells can be sintered at temperatures lower than the usually required.

    Palavras-Chave: solid oxide fuel cells; electric fields; sintering

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  • IPEN-DOC 23566

    POVEDA, PATRICIA N.S. ; SILVA, LEONARDO G.A. . Study of synergistic effect of light stabilizer additive, conventional and nanoparticles, applied to polyethylene films submitted to ultraviolet radiation. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JIAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Springer International Publishing, 2017. p. 777-785, (The Minerals, Metals & Materials Series).

    Abstract: Thermoplastic materials are sensitive to ultraviolet radiation (UV), which can cause structural changes, causing variation in mechanical properties and appearance. UV range between 250 and 400 nm is considered the most aggressive to polymers, and prolonged exposure to it results in breakage and/or crosslinking chains. Light stabilizer additives, blockers or absorbers are added to the polymers for protection in order to extend the life of the final product. The choice of the adequate light stabilizer additive system depends on factors such as resin final application, thickness, geographic location of exposure, presence of fillers in the composition, contact with chemicals, among others. This study evaluates different additive systems: conventional organic, inorganic nanotechnologyc base and the synergy between them when applied to polyethylene considering carbonyl index and UV/VIS results after aging by QUV chamber.

    Palavras-Chave: polyethylenes; nanoparticles; ultraviolet radiation; stability; aging

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  • IPEN-DOC 23567

    TEOTONIO, ERCULES E.S.; FAUSTINO, WAGNER M.; BRITO, HERMI F.; FELINTO, MARIA C.F.C. ; MOURA, JANDEILSON L.; COSTA, ISRAEL F.; SANTOS, PAULO R.S.. Mechanoluminescence of coordination compounds. In: OLAWALE, DAVID O. (Ed.); OKOLI, OKENWA O.I. (Ed.); FONTENOT, ROSS S. (Ed.); HOLLERMAN, WILLIAM A. (Ed.). Triboluminescence: theory, synthesis, and application. Switzerland: Springer, 2016. p. 39-63,

    Palavras-Chave: luminescence; photoluminescence; chemical composition

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  • IPEN-DOC 23973

    BALDOCHI, S.L. ; MORATO, S.P. . Fluoride bulk crystals growth. In: HASHMI, SALEEM (Ed.). Reference Module in Materials Science and Materials Engineering. Oxford: Elsevier, 2016. p. 1-6, DOI: 10.1016/b978-0-12-803581-8.03668-7

    Abstract: Fluoride crystals have long presented a challenge for chemists and physicists, because their preparation often requires very specific procedures. Their synthesis usually requires the use of toxic and/or corrosive materials, procedures demanding suitable equipment, and safety operational norms. Additionally, most of the fluoride compounds are moisture sensitive. As a result, a dry working environment is needed. In spite of this, fluoride crystals have found many applications as dosimeters, information storage devices, X-ray monochromators, and, in particular, in the field of optics as laser hosts and other components such as windows, which has encouraged the development of research work on the preparation of large crystals. The successful preparation of bulk fluoride crystals is dependent upon a number of factors directly related to the crystal growth conditions of the most important is the purity of the raw material. The choice of high purity commercial salts will not always assure the growth of a crystal with high quality. First, the manipulation of fluorides without the correct procedures can easily introduce moisture contamination. Fluorides are very sensitive to water and oxygen, which are always present in the work environment. Second, commercial fluorides are rarely of sufficient purity, with respect to oxygen contaminants. Usually, starting materials are ‘five-nines’ (99.999%) pure with respect to the cation. Oxygen-related impurities, such as OH , COH , NO2 , present vibrational modes in the infrared range. Their presence, even in small concentrations, can be detrimental to the quality of infrared optical devices. In general, most simple fluoride crystals, such as alkali halides (LiF, NaF, RbF) or alkaline-earth fluorides (CaF2, SrF2, BaF2), are grown directly from commercial chemicals, after a preliminary treatment to eliminate moisture and oxygen contaminants. However, more complex fluoride compounds (e.g., LiSrAlF6 or BaY2F8) need to be carefully synthesized before the growth process. A preliminary treatment or synthesis of the raw material to be used for the crystal preparation is the first step in the growth of fluoride crystals.

    Palavras-Chave: fluorides; crystal growth; crystal growth methods; rare earths; doped materials

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  • IPEN-DOC 23512

    FUNGARO, DENISE A. ; REIS, THAIS V. da S. ; LOGLI, MARCO A.; OLIVEIRA, NARA A. de. Advances in production of value-added products from sugarcane straw ash. In: DANIELS, J.A. (Ed.). Advances in Environmental Research. New York, NY: Nova Science Publishers, Inc., 2015. p. 1-22,

    Abstract: This chapter describes how sugarcane straw ash (SCSA), an agricultural waste of sugar industry, was utilized for the production of value-added products. Samples of SCSA were used on synthesis of silica gel and zeolitic material by alkaline conventional hydrothermal treatment and fusion method. The effect of synthesis parameters was studied and the conditions optimized. The materials were characterized by XRD, XRF, SEM, FT-IR, Brunauer-Emmett-Teller (BET) surface area techniques, particle size analyzer, TG/DSC and nitrogen physisorption. The presence of zeolites NaP1 and hydroxysodalite confirms successful conversion of native SCSA into zeolitic material. Furthermore, silica gel was prepared by using SCSA as sodium silicate source. Zeolitic material from sugarcane straw ash was examined by removal of dye from aqueous solution. The use of the sugarcane straw ash for production of silica gel and zeolitic material, value-added products, appears as an alternative and environmental friendly use of this byproduct, once it is an agricultural residue, that doesn't have another important use.

    Palavras-Chave: sugar cane; agricultural wastes; straw; ashes; zeolites; silica

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  • IPEN-DOC 22898

    MAZZILLI, BARBARA P. . Mineração de fosfato e produção de ácido fosfórico. In: REIS, ROCIO G. dos (Ed.). NORM: guia prático. Rio de Janeiro, RJ: Edição do Autor, 2016. p. 89-98,

    Palavras-Chave: phosphate minerals; phosphoric acid; fertilizers; radioisotopes

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  • IPEN-DOC 22895

    MAZZILLI, BARBARA P. . Comportamento dos radionuclídeos no ecossistema. In: REIS, ROCIO G. dos (Ed.). NORM: guia prático. Rio de Janeiro, RJ: Edição do Autor, 2016. p. 61-72,

    Palavras-Chave: radioisotopes; ecosystems; natural occurrence; natural radioactivity

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  • IPEN-DOC 22824

    DUARTE, C.L. . Irradiation of sugarcane bagasse for ethanol production. In: AL-ASSAF, SAPHWAN (Ed.); COQUERET, XAVIER (Ed.); DAHLAN, KHAIRUL Z.H.M. (Ed.); SEN, MURAT (Ed.); ULANSKI, PIOTR (Ed.). The Radiation Chemistry of Polysaccharides. Vienna, Austria: IAEA, 2016. p. 349-369,

    Palavras-Chave: bagasse; biofuels; biomass; ethanol; irradiation; power generation; raw materials; saccharose; sugar cane; thermal power plants; wind power; ionizing radiations

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  • IPEN-DOC 22777

    BORRELY, SUELI I. ; TEIXEIRA, ANTONIO C.S.C.; PIVELI, ROQUE P.; CAMPOS, FABIO; PEREIRA, MARIA da C.C. ; OGIHARA, VANESSA H. ; SILVA, MARCELA P.; LASTRE-ACOSTA, ARLEN M.; BATISTA, ANA P. dos S.. Chemical pollutants in water and wastewater and related Eco toxicity: advanced developing technologies for organic degradation. In: LEUNG, JONATHAN Y.S. (Ed.). Water Resources: problem and solution. Hyderabad, India: OMICS Group International, 2016. p. irregular,

    Observação: e-book

    Abstract: Environmental issues nowadays include the presence of contaminants in waters that are increasing in numbers and classes of chemicals. The environmental and human health will always depend on the protection of the air, waters, and soil. The industrial activities are as important as agriculture but a more clean production is imperative. The subject of this chapter is to discuss the xenobiotics contaminants in water and wastewaters and their related toxicity. A second issue is to show some data related to new possible technologies, under development, and their potency for decomposition of organic contaminants. Acute toxicity results evidenced the importance of this tool for assessing the impacts of toxins to living organisms and here they were used for the evaluation of proposed technologies for wastewater improvement. Three treatment technology options were presented (advanced oxidative processes, AOPs; photolysis by UV radiation, also including the Photo-Fenton processes and Ultra-sound; a special biomidia used as an additive effort to enhance biomass in order to treat landifill leachate in a sewage mixture). The last technique and Integrated Fixed-Film Activated Sludge (IFAS) was assessed for also for toxicity removals. Daphnia similis water flea and Vibrio fischeri bacteria were the target organisms for the evaluation of these processes. Acute effects removal > 20% was achieved for fluoxetine irradiated at 5kGy. ATZ acute effects were efficiently removed after 60 min of exposure to UV radiation and the combined IFAS processes were the most effective process for toxicity removal.

    Palavras-Chave: pollutants; water; wastes; toxicity; electron beams; irradiation; oxidation; pesticides; drugs; photolysis; iron complexes; xenobiotics; organic compounds; daphnia; ultraviolet radiation

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  • IPEN-DOC 22716

    RIBEIRO, MARIA A.M. . Energia Nuclear. In: PHILIPPI JUNIOR, ARLINDO (Ed.); REIS, LINEU B. dos (Ed.). Energia e sustentabilidade. Barueri, SP: Manole, 2016. p. 249-305, (Coleção ambiental, 19).

    Palavras-Chave: sustainability; nuclear energy; electric power

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  • IPEN-DOC 22707

    AGUIAR, A.A. ; LIMA, N.B. de ; BRAGA, F.J.C. ; ROSSI, W. ; COUTO, A.A. ; BALDAN, R.. Evaluation of biomimetic coatings on femtosecond laser treated alumina and alumina-zirconia composite surfaces. In: OCHSNER, ANDREAS (Ed.); ALTENBACH, HOLM (Ed.). Machining, joining and modifications of advanced materials. Singapura: Springer, 2016. p. 141-157, DOI: 10.1007/978-981-10-1082-8_15

    Abstract: The effect of texturing Al2O3 and Al2O3/ZrO2 surfaces using fem- 7 tosecond laser has been evaluated in terms of the roughness, wettability and 8 microstructure of the substrate to increase growth efficiency and adhesion of 9 hydroxyapatite. Femtosecond laser treatment of these materials causes phase 10 transformation from alpha-alumina to gamma-alumina. Heat effects during fem- 11 tosecond laser treatment causes the grains to be in the nanometer scale. Without 12 heat effects, the grains are in the micrometer scale. The use of femtosecond laser 13 permits control of the surface roughness of the alumina specimens. The higher the 14 femtosecond laser energy, the higher is the wettability of the specimen and the total 15 surface energy. Specimens with laser textured surfaces upon immersion in 1.5 SBF 16 for 6 and 15 days revealed apatite layers well bonded to the substrate and without 17 detachment. The adhesion of apatite to surfaces of specimens that were not textured 18 with femtosecond laser was inadequate

    Palavras-Chave: evaluation; coatings; lasers; aluminium oxides; zinc oxides; composite materials; surfaces; roughness; wettability; microstructure; substrates; apatites

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  • IPEN-DOC 22706

    SANTOS, G.A.; GOULART, P.R.; COUTO, A.A. ; GARCIA, A.. Primary dendrite ARM spacing effects upon mechanical properties of an AL-3Wt%CU-1Wt%LI alloy. In: OCHSNER, ANDREAS (Ed.); ALTENBACH, HOLM (Ed.). Properties and characterization of modern materials. Singapura: Springer, 2017. p. 215-229,

    Abstract: The imposition of a wide range of operational conditions in foundry and castings processes generates, as a direct consequence, a diversity of solidification structures. It is well known that mechanical properties depend on solidification structures. The literature presents relationships between yield strength and grain size, such as the Hall-Petch’s equation, or ultimate tensile strength and dendrite arm spacing. In this work, an Al–3wt%Cu–1wt%Li alloy was solidified under upward unsteady state heat flow conditions. Heat was directionally extracted only through a water-cooled bottom made of steel (SAE 1020). The aim of the present study is to obtain correlations between the as-cast microstructure, solidification thermal variables and mechanical properties of an Al–3wt%Cu–1wt%Li alloy casting. The results include tip growth rate (VL), cooling rate (T_ ), primary dendrite arm spacing (k1), ultimate tensile strength (rUTS) and yield strength (ry) as a function of solidification conditions imposed by the metal/mold system. It is found that the primary dendrite arm spacing decreases with the increase in tip growth rate and cooling rate. In both cases (rUTS and ry = 0.2 %e), the finer dendritic arrangement presents superior mechanical properties.

    Palavras-Chave: aluminium alloys; copper alloys; lithium alloys; mechanical properties; solidification; correlations; microstructure; phase diagrams; removal

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  • IPEN-DOC 22705

    ZEPKA, S.; REIS, D.A.P.; SILVA, M.M.; UEDA, M.; COUTO, A.A. ; REIS, A.G.. Evaluation of creep resistance and superficial study of titanium alloy treated by PIII-N. In: OCHSNER, ANDREAS (Ed.); ALTENBACH, HOLM (Ed.). Properties and characterization of modern materials. Singapura: Springer, 2017. p. 185-195, DOI: 10.1007/978-981-10-1602-8_17

    Abstract: The search for alloys with improved high-temperature specific strength and creep-resistance properties for aerospace applications has led in the last decades to sustained research activities to develop new alloys and/or improve existing ones. Titanium and its alloys are excellent for applications in structural components submitted to high temperatures owing to their high strength to weight ratio, good corrosion resistance and metallurgical stability. However, the high affinity to oxygen is one of the main factors that limit their application as a structural material

    Palavras-Chave: creep; titanium alloys; aluminium alloys; vanadium alloys; auger electron spectroscopy; atomic force microscopy; evaluation; roughness; mechanical properties

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  • IPEN-DOC 22704

    OLIVEIRA, M.M.; COUTO, A.A. ; BALDAN, R.; REIS, D.A.P.; VATAVUK, J.; VENDRAMIM, J.C.; LIMA, N.B. ; REIS, A.G.. High temperature mechanical behavior of plasma-nitrided Inconel 625 superalloy. In: OCHSNER, ANDREAS (Ed.); ALTENBACH, HOLM (Ed.). Properties and characterization of modern materials. Singapura: Springer, 2017. p. 167-177, DOI: 10.1007/978-981-10-1602-8_15

    Abstract: INCONEL 625 nickel-based superalloys present limitations for use at temperatures above 600 °C. For this reason, protective coatings can be used as barriers to avoid both nucleation and crack propagation. The aim of this work is to evaluate the mechanical properties at high temperatures of non-nitrided and plasma-nitrided samples of the INCONEL 625 superalloy. The microstructural characterization of the nitrided layer was performed with the aid of optical

    Palavras-Chave: inconel 625; heat resisting alloys; mechanical properties; temperature range 0400-1000 k; evaluation; microstructure; optical microscopy; x-ray diffraction

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  • IPEN-DOC 22569

    PEIXOTO, JOSE G.P.; POTIENS, MARIA da P. . X and gamma ray secondary standard metrology. In: PEIXOTO, JOSE G.P. (Ed.). Ionizing radiation metrology. Rio de Janeiro, RJ: Instituto de Radioproteção e Dosimetria, 2016. p. irregular,

    Palavras-Chave: x radiation; gamma radiation; dosimetry; calibration; radiotherapy; radiation protection

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  • IPEN-DOC 22568

    PEIXOTO, JOSE G.P.; POTIENS, MARIA da P. . Standard application in photon dosimetry. In: PEIXOTO, JOSE G.P. (Ed.). Ionizing radiation metrology. Rio de Janeiro, RJ: Instituto de Radioproteção e Dosimetria, 2016. p. irregular,

    Palavras-Chave: dosimetry; dosemeters; ionization chambers; calibration; uses; photons

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  • IPEN-DOC 22503

    BALDOCHI, S.L. ; RANIERI, I.M. . Alkali halide crystals growth. In: HASHMI, SALEEM (Ed.). Reference module in materials science and materials engineering. Oxford: Elsevier, 2016. p. 1-6, DOI: 10.1016/B978-0-12-803581-8.02424-3

    Palavras-Chave: alkali metals; halides; crystal growth; purification; impurities; heavy metals; crystal growth methods; uses

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  • IPEN-DOC 22480

    DUARTE, R.C. ; FANARO, G.B.; SANTANA, J.; GASPAR, E.M.M.S.; VILLAVICENCIO, A.L.C.H. . Cinnamomum zeylanicum Blume and Myristica fragrans Houtt essential oils as bio-pesticides against the fungus Guignardia citricarpa. In: MENDEZ VILAS, A. (Ed.). The battle against microbial pathogens: basic science, technological advances and educational programs. Badajoz, Espanha: Formatex Research Center, 2015. p. 125-130, (Microbiology book series).

    Palavras-Chave: essential oils; fungal diseases; fungicides; spices; herbs; pesticides; distillation; gas chromatography; mass spectroscopy

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  • IPEN-DOC 22483

    DUARTE, C.L. ; BORRELY, S.I. ; OIKAWA, H. ; MORI, M.N. ; RELA, P.R. ; COSTA, F.E. ; SAMPA, M.H.O. . Overview of radiation technology for environmental remediation in Brazil. In: INTERNATIONAL ATOMIC ENERGY AGENCY (Ed.). Radiation technology for cleaner products and processes. Vienna: IAEA, 2016. p. 26-37, (IAEA-TECHDOC-1786).

    Palavras-Chave: brazil; ionizing radiations; water; waste water; organic compounds; environment; efficiency; evaluation

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  • IPEN-DOC 22342

    AURELIANO, DEBORA P. ; RIBEIRO, MARTHA S. ; LINDOSO, JOSE A.L.; POGLIANI, FABIO C.; SELLERA, FABIO P.; SONG, DENNIS; BAPTISTA, MAURICIO S.. Treatment and control of Leihmaniasis using photodynamic therapy. In: CLABORN, DAVID M. (Ed.). Leishmaniasis - trends in epidemiology, diagnosis and treatment. Rijeka, Croacia: Intech Open Access, 2015. p. 393-412,

    Palavras-Chave: reviews; therapy; control; parasitic diseases; protozoa; animals; blood; in vitro

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  • IPEN-DOC 22340

    FIGUEIREDO, ANA M.G. ; RIBEIRO, ANDREZA P. . Brazilian PGE research data survey on urban and roadside soils. In: ZEREINI, F. (Ed.); WISEMAN, C.L.S. (Ed.). Platinum metals in the environment, environmental science and engineering. Berlin: Springer Verlag Berlin Heidelberg, 2015. p. 131-144, DOI: 10.1007/978-3-662-44559-4_9

    Palavras-Chave: monitoring; platinum; palladium; rhodium; roads; soils; urban areas; icp mass spectroscopy

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  • IPEN-DOC 22341

    GUSATTI, M.; SOUZA, D.A.R.; DURAZZO, M. ; RIELLA, H.G.. Chemical processes for the synthesis of nanostructured materials. In: AHMED, WAGAR (Org.); ALI, NASAR (Org.). Manufacturing nanostructures. Manchester, UK: One Central Press, 2014. p. 50-78,

    Palavras-Chave: nanomaterials; synthesis; nanostructures; sol-gel process; x-ray diffraction; transmission electron microscopy; crystal growth; zinc oxides; gold oxides; titanium oxides; manufacturing

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  • IPEN-DOC 22199

    NUNES, KELLY P. ; MUNITA, CASIMIRO S. ; OLIVEIRA, PAULO M.S. ; NEVES, EDUARDO G.; TAMANAHA, EDUARDO K.. Caracterización química de cerámicas del sitio Hatahara, Amazonia - Brasil. In: . Las técnicas analíticas nucleares y el patrimonio cultural. Quito, Equador: Instituto Nacional de Patrimonio Cultural, 2010. p. 54-72, (Serie Estudios).

    Palavras-Chave: ceramics; archaeological sites; multi-element analysis; chemical analysis; brazil; neutron activation analysis; quality control

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  • IPEN-DOC 22198

    MONTEIRO, WALDEMAR A. . The influence of alloy element on magnesium for electronic devices applications - A review. In: MONTEIRO, WALDEMAR A. (Ed.). Light metal alloys applications. Intech: Open Access, 2014. p. 229-241,

    Palavras-Chave: alloys; magnesium; equipment; electronic equipment; uses; reviews; magnesium alloys; industry; elements

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  • IPEN-DOC 22151

    VARELA, JOSE A.; ORLANDI, MARCELO O.; MUCCILLO, ELIANA N. dos S. ; MUCCILLO, REGINALDO . Oxide ceramics: the role of surface and grain boundaries for reliable functional applications. In: OHJI, TATSUKI (Ed.); SINGH, MRITYUNJAY (Ed.). Enginnering ceramics current status and future prospects. New York, NY: The American Ceramic Society and John Wiley & Sons, 2016. p. 415-426,

    Palavras-Chave: oxides; grain boundaries; semiconductor resistors; sensors; solid oxide fuel cells; ceramics; surfaces; interfaces

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  • IPEN-DOC 22150

    GATTI, LUCIANA V. ; BASSO, LUANA S.; BORGES, VIVIANE F. . Florestas e as mudanças climáticas. In: JACOBI, PEDRO R. (Org.); GRANDISOLI, EDSON (Org.); COUTINHO, SONIA M.V. (Org.); MAIA, ROBERTA de A. (Org.); TOLEDO, RENATA F. de (Org.). Temas atuais em mudanças climáticas para os ensinos fundamental e médio. 1 ed.. São Paulo, SP: IEE - USP, 2015. p. 42-49, cap. 3. DOI: 10.11606/9788586923418

    Palavras-Chave: forests; climatic change; brazil; amazon river; soils; deforestation; fires

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  • IPEN-DOC 22013

    CANDIOTO, KATIA C.G.; CALIARI, FELIPE R.; REIS, DANIELI A.P.; COUTO, ANTONIO A. ; NUNES, CARLOS A.. Characterization of the superalloy inconel 718 after double aging heat treatment. In: OSCHSNER, A. (Ed.); ALTENBACH, H. (Ed.). Mechanical and materials engieering of modern structure and component design. Switzerland: Springer International Publishing, 2015. p. 293-300, (Advance Structure Materials, 70).

    Palavras-Chave: heat resisting alloys; inconel 718; aging; heat treatments; microstructure; solid solutions; laves phases; x-ray diffraction; scanning electron microscopy

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  • IPEN-DOC 22010

    OSSO JUNIOR, J.A. ; DIAS, C.R.B.R. ; TEODORO, R.; CATANOSO, M.F. ; BRAMBILLA, T.P.; POZZO, L.; SQUAIR, P.; FUKUMORI, N. ; CARVALHO, F.M.S. ; ZINI, J. ; CAMILO, R.L. ; FORBICINI, C. ; YAMAMURA, M. ; ARAUJO, I.C. ; FREITAS, A.A. ; CARVALHO, E.U. ; DURAZZO, M. ; SILVA, A.M. ; PIRES, M.A. ; MARUMO, J.T. ; DELLAMANO, J.C.; MENGATTI, J. ; PERROTTA, J.A. . Status report on thechnical progress for LEU-based sup(99)Mo production at IPEN-CNEN/SP, Brazil - Modified Cintichem process. In: INTERNATIONAL ATOMIC ENERGY AGENCY (Ed.). Feasibility of producing molybdenum-99 on a small scale using fission of low enriched uranium or neutron activation of natural molybdenum. CRP Nr. 13358 Small scale indigenous molybdenum-99 (Mo-99) production using Low Enriched Uranium (LEU) fission or neutron activation - Stated in October 2005 - November 2011... Vienna: IAEA, 2015. p. 1-19, (Tecnical Reports Series, 478).

    Palavras-Chave: progress report; production; molybdenum 99; uranium 235; radiopharmaceuticals; isotope production; targets; fission; precipitation; benzoinoxime

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  • IPEN-DOC 21801

    INAMURA, P.Y. ; KRAIDE, F.H. ; ARMELIN, M.J.A. ; SCAPIN, M.A. ; MOURA, E.A.B. ; MASTRO, N.L. . Characterization of Brazil nut fibers. In: FANGUEIRO, R. (Ed.); RANA, S. (Ed.). Natural fibers: advances in science and technology towards industrial applications. Netherlands: Springer International Publishing, 2016. p. 71-85, (RILEM Bookseries, 12).

    Palavras-Chave: brazil; nuts; fibers; capsules; shells; organic compounds; neutron activation analysis; gamma spectroscopy; x-ray fluorescence analysis; fluorescence spectroscopy; cellulose

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  • IPEN-DOC 21794

    ZEZELL, DENISE M. ; ANA, PATRICIA A.. High power lasers and their interation with biological tissues. In: FREITAS, PATRICIA M. de (Ed.); SIMOES, ALYNE (Ed.). Lasers in dentistry: guide for clinical practice. New York, NY: John Wiley & Sons, Inc., 2015. p. 11-18,

    Palavras-Chave: lasers; animal tissues; biological effects; dentistry; heat; reflection; scattering; absorption; transmission

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  • IPEN-DOC 21795

    REIS, ADRIANO G. dos; REIS, DANIELI A.P.; ABDALLA, ANTONIO J.; OTUBO, JORGE; ZEPKA, SUSANA; COUTO, ANTONIO A. ; SCHEID, VLADIMIR H.B.. Effect of simultaneous plasma nitriding and aging treatment on the microstructure and hardness of maraging 300 steel. In: OSCHSNER, A. (Ed.); ALTENBACH, H. (Ed.). Mechanical and materials engieering of modern structure and component design. Switzerland: Springer International Publishing, 2015. p. 277-284, (Advance Structure Materials, 70). DOI: 10.1007/978-3-319-19443-1_37

    Palavras-Chave: nitrides; maraging steels; plasma; depth; microstructure; hardness; aging; heat treatments; reactors

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  • IPEN-DOC 21796

    SILVA, LEANDRO C. da; COUTO, ANTONIO A. ; BALDAN, RENATO ; VATAVUK, JAN. Study of the utilization of polyamide composite with fiberglass reinforcement in automotive engine mounts. In: OSCHSNER, A. (Ed.); ALTENBACH, H. (Ed.). Mechanical and materials engineering of modern structure and component design. Switzerland: Springer International Publishing, 2015. p. 71-83, (Advance Structure Materials, 70).

    Palavras-Chave: polyamides; composite materials; fiberglass; fatigue; aluminium; weight; fatigue; automobiles

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  • IPEN-DOC 21791

    ANDRADE e SILVA, L.G. ; EVORA, M.C.. Development of radiation processing to functionalize carbon nanofiber to use in nanocomposite for industrial applications. In: IAEA (Ed.). Radiation curing composites for enhancing their features and utility in health care and industry. Vienna: IAEA, 2015. p. 28-44, (IAEA-TECHDOC-1764).

    Palavras-Chave: nanostructures; composite materials; carbon; graft polymers; industry; nanofibers; nanocomposites

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  • IPEN-DOC 21750

    UMBEHAUN, P.E. ; ANDRADE, D.A. de ; TORRES, W.M. ; RICCI FILHO, W. . IEA-R1 Nuclear Reactor: Facility specification and experimental results. In: INTERNATIONAL ATOMIC ENERGY AGENCY (Ed.). Research reactor benchmarking database. Vienna: IAEA, 2015. p. 1-30, (Tecnical Reports Series, 480).

    Palavras-Chave: iear-1 reactor; nuclear facilities; experimental data; pipes; fuel assemblies; burnup; delayed neutrons; prompt neutrons; void coefficient

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  • IPEN-DOC 21748

    VARCA, G.H.C. ; FERRAZ, C.C. ; MATHOR, M.B. ; LOPES, P.S. ; ROGERO, S. ; ROGERO, J.R. ; LUGAO, A.B. . Encapsulation and nanoencapsulation of papain active sites to enhance radiolytic stability and decrease toxicity. In: IAEA (Ed.). Nanoscale radiation engineering of advanced materials for potential biomedical applications. Vienna: IAEA, 2015. p. 31-46, (IAEA Radiation Technology Reports, 5).

    Palavras-Chave: papain; encapsulation; nanotechnology; stability; toxicity; gamma radiation; hydrogels; dextrin

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A pesquisa no RD utiliza os recursos de busca da maioria das bases de dados. No entanto algumas dicas podem auxiliar para obter um resultado mais pertinente.

✔ É possível efetuar a busca de um autor ou um termo em todo o RD, por meio do Buscar no Repositório , isto é, o termo solicitado será localizado em qualquer campo do RD. No entanto esse tipo de pesquisa não é recomendada a não ser que se deseje um resultado amplo e generalizado.

✔ A pesquisa apresentará melhor resultado selecionando um dos filtros disponíveis em Navegar

✔ Os filtros disponíveis em Navegar tais como: Coleções, Ano de publicação, Títulos, Assuntos, Autores, Revista, Tipo de publicação são autoexplicativos. O filtro, Autores IPEN apresenta uma relação com os autores vinculados ao IPEN; o ID Autor IPEN diz respeito ao número único de identificação de cada autor constante no RD e sob o qual estão agrupados todos os seus trabalhos independente das variáveis do seu nome; Tipo de acesso diz respeito à acessibilidade do documento, isto é , sujeito as leis de direitos autorais, ID RT apresenta a relação dos relatórios técnicos, restritos para consulta das comunidades indicadas.

A opção Busca avançada utiliza os conectores da lógica boleana, é o melhor recurso para combinar chaves de busca e obter documentos relevantes à sua pesquisa, utilize os filtros apresentados na caixa de seleção para refinar o resultado de busca. Pode-se adicionar vários filtros a uma mesma busca.

Exemplo:

Buscar os artigos apresentados em um evento internacional de 2015, sobre loss of coolant, do autor Maprelian.

Autor: Maprelian

Título: loss of coolant

Tipo de publicação: Texto completo de evento

Ano de publicação: 2015

✔ Para indexação dos documentos é utilizado o Thesaurus do INIS, especializado na área nuclear e utilizado em todos os países membros da International Atomic Energy Agency – IAEA , por esse motivo, utilize os termos de busca de assunto em inglês; isto não exclui a busca livre por palavras, apenas o resultado pode não ser tão relevante ou pertinente.

✔ 95% do RD apresenta o texto completo do documento com livre acesso, para aqueles que apresentam o significa que e o documento está sujeito as leis de direitos autorais, solicita-se nesses casos contatar a Biblioteca do IPEN, bibl@ipen.br .

✔ Ao efetuar a busca por um autor o RD apresentará uma relação de todos os trabalhos depositados no RD. No lado direito da tela são apresentados os coautores com o número de trabalhos produzidos em conjunto bem como os assuntos abordados e os respectivos anos de publicação agrupados.

✔ O RD disponibiliza um quadro estatístico de produtividade, onde é possível visualizar o número dos trabalhos agrupados por tipo de coleção, a medida que estão sendo depositados no RD.

✔ Na página inicial nas referências são sinalizados todos os autores IPEN, ao clicar nesse símbolo será aberta uma nova página correspondente à aquele autor – trata-se da página do pesquisador.

✔ Na página do pesquisador, é possível verificar, as variações do nome, a relação de todos os trabalhos com texto completo bem como um quadro resumo numérico; há links para o Currículo Lattes e o Google Acadêmico ( quando esse for informado).

ATENÇÃO!

ESTE TEXTO "AJUDA" ESTÁ SUJEITO A ATUALIZAÇÕES CONSTANTES, A MEDIDA QUE NOVAS FUNCIONALIDADES E RECURSOS DE BUSCA FOREM SENDO DESENVOLVIDOS PELAS EQUIPES DA BIBLIOTECA E DA INFORMÁTICA.

O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.

A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.

1. Portaria IPEN-CNEN/SP nº 387, que estabeleceu os princípios que nortearam a criação do RDI, clique aqui.


2. A experiência do Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP) na criação de um Repositório Digital Institucional – RDI, clique aqui.

O Repositório Digital do IPEN é um equipamento institucional de acesso aberto, criado com o objetivo de reunir, preservar, disponibilizar e conferir maior visibilidade à Produção Científica publicada pelo Instituto, desde sua criação em 1956.

Operando, inicialmente como uma base de dados referencial o Repositório foi disponibilizado na atual plataforma, em junho de 2015. No Repositório está disponível o acesso ao conteúdo digital de artigos de periódicos, eventos, nacionais e internacionais, livros, capítulos, dissertações, teses e relatórios técnicos.

A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.

O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.