Gamma Rays
Mostrando 13-24 de 185 artigos, teses e dissertações.
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13. Estudo do processo de esferolização de partículas vítreas visando a aplicação em radioterapia interna seletiva / Study of the spheroidization process of glass particles for selective internal radiotherapy
The selective internal radiotherapy is an alternative method to treat hepatocellular carcinoma. Glass microspheres containing radionuclides are introduced in the liver through the hepatic artery, and they are housed preferentially in the region where the cancer cells are located. The microspheres are trapped in the arterioles which feed the tumors, and the &
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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14. Modificação de poli(fluoreto de vinilideno) induzida por radiação gama para aplicação como compósito ionomérico de metal-polímero / Poly(vinylidene fluoride) modification induced by gamma irradiation for application as ionic polymer-metal composite
Gamma-radiation-induced grafting of styrene into poly(vinylidene fluoride) (PVDF) films with 0.125 mm thickness at doses from 1 to 100 kGy in the presence of a styrene/N,N- dimethylformamide (DMF) solution (1:1, v/v) and styrene/toluene (1:1, v/v) at dose rate of 5 kGy h-1 was carried out by simultaneous method under nitrogen atmosphere at room temperature,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
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15. Geoquímica orgânica aplicada à formação Irati, área de Herval, Rio Grande do Sul (RS), bacia do Paraná / Organic geochemistry applied to Irati formation, Herval area of Rio Grande do Sul, Paraná basin
The current research had the main focus on the geochemical study of a borehole in the Parana Basin at Herval city (RS), aiming to fill some gaps in the organic geochemistry of the Irati Formation. Ten chemical-stratigraphic units were defined from analytical data of Total Organic Carbon (TOC), total sulfur, insoluble residue, gamma-rays, isotopes of organic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2011
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16. Morphofunctional evaluation of human skin preserved in glycerol and exposed to gamma radiation: a study in athymic mice / Avaliação morfofuncional de pele humana conservada em glicerol e submetida à radiação gama: estudo em camundongos atímicos
Extensas lesões na pele expõem o organismo a uma série de agentes agressores, dificultando a reparação espontânea da pele e muitas vezes levando o paciente a óbito. Nesse caso, se não houver áreas doadoras de autoenxertos, pode se utilizar aloenxertos. Neste tipo de enxerto, os tecidos são processados em Bancos de Tecidos, onde se pode empregar a r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2011
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17. Efeito da radiação gama em propriedades da farinha de banana verde / Effect of gamma radiation in properties of green banana flour
Banana starch has been researched in the area of nutrition from the introduction of the Resistant Starch concept (RS). The starch of Musa AAA-Nanicão and Musa AAB-Terra had been already characterized in relation to their physiological responses. Green banana possesses important amount of resistant starch. The main interest in relation to the resistant starc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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18. Inducao de mutacao visando obtencao de resistencia a doencas na cultivar de trigo IAC-24.
Objetivou-se a obtencao de resistencia a doencas atraves da inducao de mutacao por raios-gama no trigo (Triticum aestivum L.) cv. IAC-24. Sementes foram irradiadas com 25 e 35 Krad, e a partir da geracao M2 iniciou-se a selecao. Oito das linhagens selecionadas foram comparadas com a cultivar original, durante tres anos (geracoes M6, M7 e M8), em nove ensaios
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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19. Inducao de mutacao in vivo, no melhoramento de crisantemo (Dendranthema grandiflora Tzvelev) cv. repin rosa.
Objetivou-se adaptar e utilizar o metodo de inducao de mutacao por irradiacao no melhoramento de crisantemo, para a obtencao de mutantes na colaracao de petalas da cultivar Repin Rosa. Mudas obtidas a partir de estacas enraizadas foram submetidas a irradiacao com 20 Gy de raios-gama aplicando-se a seguir o metodo de podas repetidas para avanco das geracoes,
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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20. Effect of particle size in the TL response of natural quartz sensitized by high dose of gamma radiation and heat-treatments
This work investigates the effect of particle size in the thermoluminescence (TL) response of a quartz crystal that was initially crushed and classified into ten size fractions between 38 μm and 5 mm. Aliquots of each size fraction were sensitized with a dose of 25 kGy of γ rays and heat-treatments at 400 °C. TL glow curves of sensitized and non-sensitize
Materials Research. Publicado em: 2010-06
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21. Cell toxicity in vitro analysis of PVC tubes consecutively submitted to gamma-rays and ethylene oxide sterilization / Análise in vitro da toxicidade celular de tubos de PVC esterilizados consecutivamente em raios gama e óxido de etileno
In 1967, a letter sent to the British Medical Journal reported that the re-sterilization with Ethylene Oxide (EtO) of previously irradiated Polyvinyl Chloride (PVC) formed large amounts of ethylene chlorohydrin, a highly toxic compound. Even though it did not present measured data, this letter initiated a controversy that still divide the opinion of research
Publicado em: 2010
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22. Pequenos polarons ligados e centros de cor em topázio
In the present work we studied the color beneficiation processes of colorless topaz, an abundant gemstone in Brazil. Blue topaz is the most internationally traded gemstone in the gem and market, reaching about 100 million carats per year. Almost 100% of blue topaz received some treatment to improve the color that, generally, involves some type of irradiation
Publicado em: 2010
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23. Feijão pré-cozido irradiado com raios gama do Cobalto-60: uma alternativa de consumo / Precooked beans irradiated with gamma rays of Cobalt-60: an alternative for consumption
The bean (Phaseolus vulgaris L.) is a leguminosae with high nutritional value due especially to its mineral and proteinic content. A decrease in consumption of beans has been observed due to modern eating habits related to factors such as distance between home and work, increase in the number of female workers outside home, labor market competition which acc
Publicado em: 2010
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24. Identification of 2nd chromosome region translocated onto the W chromosome by RFLP with EST-cDNA clones in the Gensei-kouken strains of the mulberry silkworm, Bombyx mori L
In silkworms, sex-limited strains are either obtained spontaneously or induced by X-rays or gamma rays. When a fragment of an autosome carrying a dominant allele of those genes responsible for certain characters is translocated onto a W chromosome, the female of the successive generations will express these phenotypic characters and sex discrimination can be
Genetics and Molecular Biology. Publicado em: 18/12/2009