Gamma Irradiator
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Retrieval of GammaCell 220 irradiator isodose curves with MCNP simulations and experimental measurements
Gamma irradiator facilities can be used in a wide range of applications such as biological and chemical researches, sterilization of medical devices and products. Dose mapping must be performed in these equipments in order to establish plant operational parameters, as dose uniformity, source utilization efficiency and maximum and minimum dose positions. The
Brazilian Journal of Physics. Publicado em: 2010-03
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2. Sterilization of fruit flies (Diptera: Tephritidae) with X-rays for Sterile Insect Technique Programs / Esterilização de moscas-das-frutas (Diptera: Tephritidae) com raios-X para Programas de Técnica do Inseto Estéril
Recent fear of acts of terrorism provoked an increase of delays and denials in the shipment of radioisotopes. This truly represented a menace to sterile insect production projects around the world. In order to validate the use of a new kind of low-energy X-ray irradiator, a series of radiobiological studies on Ceratitis capitata (tsl-VIENNA 8 strain) (Wied.,
Publicado em: 2009
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3. DETERMINATION OF VOLATILES PRODUCED DURING RADIATION PROCESSING IN FOOD AND MEDICINAL HERBS / Determinação de voláteis produzidos durante o processamento por radiação em ervas alimentícias e medicinais
In order to protect food from pathogenic microorganisms as well as to increase its shelf life while keeping sensorial properties (e.g. odor and taste), once the latter are one of the main properties required by spice buyers, it is necessary to analyze volatile formation from irradiation of medicinal and food herbs. The aim of the present study was to analyze
Publicado em: 2008
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4. Shelf-life increase of fresh mushrooms Pleurotus sajor-caju using gamma radiation. / Aumento da vida útil de cogumelos Pleurotus sajor-caju in natura com aplicação de radiação gama
The production and consumption of edible mushrooms has been increasing in the last years due to its nutritional composition and sensory quality. The irradiation of mushrooms has been used with the purpose of maintaining the fresh product characteristics during shelf-life. The present study evaluated the effect of different radiation doses on the conservation
Publicado em: 2008
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5. Descontaminação de embalagens descartadas de clorpirifós utilizando o processo de oxidação avançada por radiação ionizante / Decontamination of used pesticide packaging using advanced oxidation process by ionizing radiation
The discharge of empty plastic packaging of pesticides can be an environmental concern causing problems to human health, animals and plants if done without inspection and monitoring. Among the commercial pesticides, chlorpyrifos has significant importance because of its wide distribution and extensive use and persistence. The hydroxil OH atack is the most ef
Publicado em: 2006
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6. UtilizaÃÃo do dosÃmetro Fricke para dosimetria de mÃquinas teleterapÃuticas, irradiadores gammacel e aparelhos de raios-X superficiais
The chemical dosimetry has been used as a reference in the measurement of the absorbed dose, with the Fricke dosimeter, at standardization laboratories. This dosimeter is considered an absolute dosimetric standard for measurements of radiation doses ranging from 20 to 400 Gy, covering a wide energy spectrum, from X-ray, g-ray to fast electron beam. The objec
Publicado em: 2006
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7. "Câmara de ionização aplicada a medidas de altas taxas de dose." / Ionization chamber for high dose measurements
Industrial gamma irradiators facilities are designed for processing large amounts of products, which are exposed to large doses of gamma radiation. The irradiation, in industrial scale, is usually carried out in a dynamic form, where the products go through a 60Co gamma source with activity of TBq to PBq (kCi to MCi). The dose is estimated as being directly
Publicado em: 2005
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8. VIDRO COMERCIAL COMO DETECTOR E MEDIDOR DE RADIAÇÃO NUM IRRADIADOR DE GRANDE PORTE. / COMMERCIAL PLATE WINDOW GLASS AS DETECTOR AND RADIATION METER AT A TOTE BOX IRRADIATOR
Amostras de vidro comercial para janelas de fabricação nacional foram testadas como dosímetros de rotina para doses altas em um irradiador de grande porte que utiliza uma fonte de Co-60. Estas amostras foram estudadas em termos da uniformidade do lote, repetibilidade, desvanecimento, resposta à dose absorvida entre 5 e 30 kGy, de processamentos rotineiro
Publicado em: 2000
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9. Inactivation of Escherichia coli O157:H7 in Apple Juice by Irradiation
Three strains (932, Ent-C9490, and SEA13B88) of Escherichia coli O157:H7 were used to determine the effectiveness of low-dose gamma irradiation for eliminating E. coli O157:H7 from apple juice or cider and to characterize the effect of inducing pH-dependent, stationary-phase acid resistance on radiation resistance. The strains were grown in tryptic soy broth
American Society for Microbiology.