Global ETD Search

111	Estudo dos efeitos da radiacao gama de Co-60 nas propriedades bioquimicas, biologicas e imunologicas do veneno de Bothrops jararaca GUARNIERI, MIRIAM C. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:36:57Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:56:24Z (GMT). No. of bitstreams: 1 04487.pdf: 6202047 bytes, checksum: d6f9351f75eefa6c4071a16adc9fca21 (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP venoms snakes cobalt 60 gamma radiation radiation effects biochemical reaction kinetics enzyme inhibitors immunology biological radiation effects tocixity
112	Contribuicao para avaliacao critica da radioprotecao por meio da analise retrospectiva das doses associadas ao trabalho com fontes nao seladas de iodo-131 CARNEIRO, JANETE C.G.G. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:43:21Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:58:04Z (GMT). No. of bitstreams: 1 06428.pdf: 6304808 bytes, checksum: 564076d766d1209b8ce5d2f96ff4876b (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP iodine 131 dosimetry radiation doses radiation effects radiation protection occupational exposure cumulative radiation effects statistical data radionuclide kinetics dose equivalents
113	Photo-Curing Through Single Apertures: The Phenomenon and Its Influence On Polymerization MacPherson, Meoghan Elizabeth January 2013 (has links) Indiana University-Purdue University Indianapolis (IUPUI) / Reduction of the polymerization shrinkage stress inherent of dimethacrylate-based resin composites has been a work in progress since the phenomenon was first described by Dr. Rafael L. Bowen in 1967. Contemporary efforts to modify the composites or the curing protocols for polymerization have proven a challenging task with controversial results. Influenced by existing mathematical models relating exposure, curing time and depth of cure of resin composites, a novel method for the reduction of polymerization shrinkage stress is proposed. By polymerizing through a single aperture mask, a dental light curing unit is transformed from a planar light source to a point light source, and a fully cured, three-dimensional “bullet” shaped curing front is predicted for the cured resin below. So long as the edges of the bullet do not touch the cavity walls or floor, the shrinkage stress of the bullet is not transferred. Follow-up with an unmasked curing unit then fully polymerizes the restoration. By reducing the volume of uncured composite in contact with the cavity walls and floor, shrinkage stress of the restoration is also reduced. The objective of the present study was to demonstrate this curing phenomenon with a model resin composite using masks with aperture diameters of 0.5, 0.4, and 0.25 mm and curing times of 10, 20, 30, and 40 seconds. The resulting curing front was evaluated quantitatively and qualitatively. From this, mathematical models of the curing front were derived. Selected combinations of aperture mask and curing time were then investigated to evaluate the influence of this phenomenon on the degree of conversion, Knoop hardness, and polymerization shrinkage stress of the same model resin composite. Group differences were analyzed using a one-way ANOVA at 5% significance. composite resin polymerization shrinkage stress Composite Resins -- chemistry Composite resins -- radiation effects Polymerization -- radiation effects Dental Stree Analysis Polyethylene Glycols -- chemistry Polyurethanes -- chemistry Polyurethanes -- radiation effects
114	Segregacao e difusao de defeitos induzidos por radiacao em ligas binarias de cobre MONTEIRO, WALDEMAR A. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:31:47Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:01:06Z (GMT). No. of bitstreams: 1 02244.pdf: 4326578 bytes, checksum: 834efdf150538f542e76a841e126035c (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP copper alloys radiation effects binary alloy systems diagrams electron beams electron microscopy images optical microscopy point defects radiation effects alloys systems segregation
115	Segregacao e difusao de defeitos induzidos por radiacao em ligas binarias de cobre MONTEIRO, WALDEMAR A. 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:31:47Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:01:06Z (GMT). No. of bitstreams: 1 02244.pdf: 4326578 bytes, checksum: 834efdf150538f542e76a841e126035c (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP copper alloys radiation effects binary alloy systems diagrams electron beams electron microscopy images optical microscopy point defects radiation effects alloy systems segregation
116	Radiation effects on custom MOS devices Harris, Rhodri January 1999 (has links) No description available. 621.31042
117	DNA repair pathways involved in determining the level of cytotoxicity of environmentally relevant UV radiation Carpenter, Lucy January 2000 (has links) No description available. 571.45
118	Microscopic studies of doped and electron irradiated CVD diamond Gilmore, Annette Clare January 1999 (has links) No description available. 530.41
119	Radiation-induced apoptosis and cell cycle checkpoints in human colorectal tumour cell lines Playle, Laura Charlotte January 2001 (has links) No description available. 572.8
120	Human skeletal uptake of natural alpha radioactivity from '2'1'0Pb-supported '2'1'0Po Oyedepo, Aderonke Caroline January 1998 (has links) No description available. 571.4

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