Not Ionizing Radiations
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Ocorrência de mutações em loci ligados ao cromossomo Y na prole nascida de indivíduos expostos à radiação ionizante / Occurrence of mutations in loci linked to Y chromosome in the offspring born to individuals exposed to ionizing radiation
In September 1987, in Goiânia-GO, Brazil, one of the most serious radiological accidents occurred at a radiotherapy unit involving a source of cesium-137. An area of 2,000 m2 was contaminated and 249 people were exposed, both externally and internally, to substantial doses of ionizing radiation, resulting in four fatalities due to acute radiation syndrome.
Publicado em: 2009
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2. InfluÃncia da radiaÃÃo gama de alta taxa de dose na sobrevivÃncia e na reproduÃÃo de Biomphalaria glabrata
The ionizing radiations are known as mutagenic agents, also causing infertility due to the molecular alterations they induced. This characteristic has motivated the application of this radiation on animal biological control, mainly in situations that involves public health. In this context, the freshwater snail Biomphalaria glabrata can be considered as an e
Publicado em: 2008
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3. Avaliação do desempenho de embalagens para alimentos quando submetidas a tratamento por radiação ionizante / Evaluation of performance of food packagings when treated with ionizing radiation
In this study the mechanical properties (tensile strength and percentage elongation at break and penetration resistance), optical properties, gas oxygen and water vapor permeability, the overall migration tests into aqueous food simulant (3% aqueous acetic acid) and fatty food simulant (n-heptane), as well as the formation of volatile radiation product tests
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/03/2006
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4. VERIFICATION OF THE RADIATION LEVELS EMITTED BY ERBS ANTENNAE AND THE PERCEPTION OF HE CLOSE COMMUNITIES / VERIFICAÇÃO DOS NÍVEIS DE RADIAÇÃO EMITIDOS PELAS ANTENAS DAS ERBS E A PERCEPÇÃO DAS COMUNIDADES PRÓXIMAS
With the implantation and spread of new cellular systems, mainly starting from the eighties, new technologies were developed, the number of cellular grew in a surprising way, as consequence, the Base Stations increased, too. The people, in general, are exposed to the radiations emitted by ERBs antennae. As the population doesn t have any control on such leve
Publicado em: 2005
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5. Interação das Ondas Eletromagnéticas com o Material Biológico / Interaction of the Electromagnetic Waves with the Biological Material
Com o avanço das tecnologias de telecomunicações, a interação entre povos, tecnologia e máquinas, torna-se muito ativa e eficaz, trazendo como resultado final uma única comunidade global. Essa nova tecnologia que é muito usada atualmente, torna-se uma parte integrante essencial da nossa vida, ela deve ser entendida assim como absorvida pela sociedade
Publicado em: 2005
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6. Determinação de alfa-Tocoferol em alho irradiado utilizando cromatografia líquida de alta eficiência (CLAE)
The effects of 60Co ionizing radiations in doses of 0, 75, 100, 150, 200 and 250Gy on garlic, upon the alpha-tocopherol concentration were studied. The alpha-tocopherol contents were established by high performance liquid chromatography (HPLC), after direct hexane extraction from the garlic samples. The alpha-tocopherol was determined through normal-phase co
Química Nova. Publicado em: 2003-01
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7. Expression of the E. coli fpg gene in mammalian cells reduces the mutagenicity of gamma-rays.
The E. coli fpg gene encodes the formamido-pyrimidine-DNA-glycosylase (FPG protein) which specifically removes the formamido-pyrimidine and C8-oxoGuanine residues from gamma-irradiated DNA. The fpg gene was ligated in the psV2 vector and transfected into the Chinese hamster CHO and V-79 cells. The transfected cells expressed a formamido-pyrimidine-DNA-glycos
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8. Isolation and Characterization of Conditional Alleles of Bacteriophage T4 Genes uvsX and uvsY
The bacteriophage T4 uvsW, uvsX and uvsY gene functions are required for wild-type levels of recombination and for normal survival and mutagenesis after treatments with ultraviolet (UV) and ionizing radiations. The ability of uvsX and uvsY mutations to suppress the lethality of gene 49 mutations was used to select temperature-sensitive and amber alleles of t
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9. Immunity to Aerosol Challenge in Guinea Pigs Immunized with Gamma-Irradiated Venezuelan Equine Encephalitis Vaccines
In a previous report, it was shown that nonviable Venezuelan equine encephalitis (VEE) vaccines prepared by exposure of virus suspensions produced in WI-38 cells to ionizing radiations were highly effective in protecting guinea pigs subjected to intraperitoneal (ip) challenge with VEE virus. To characterize further the efficacy of irradiated vaccines, guinea
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10. Resistivity of Spores to Ultraviolet and γ Radiation while Exposed to Ultrahigh Vacuum or at Atmospheric Pressure1
Viability studies were conducted on microbial spores subjected to ultrahigh vacuum (UHV) in the 10-9 to 10-10 torr range. After 5 to 7 days in vacuum, they were exposed to ultraviolet (UV) or to γ radiation either while still under vacuum or in the presence of dried air. Among the four test organisms subjected to UHV and ultraviolet radiation, Aspergillus n
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11. Cloning of Gene lon (capR) of Escherichia coli K-12 and Identification of Polypeptides Specified by the Cloned Deoxyribonucleic Acid Fragment
A mutation in the lon (capR) gene of Escherichia coli K-12 results in overproduction of capsular polysaccharide and increased sensitivity to ultraviolet and ionizing radiations. The lon (capR) gene deoxyribonucleic acid was cloned from a new F′ factor. The new plasmids, designated pBZ201 and pBZ203, (i) contained an additional 8.2-megadalton (Md) EcoRI fra