Chemical Radiation Effects
Mostrando 1-12 de 54 artigos, teses e dissertações.
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1. Sunscreen lotions in the dermatological prescription: review of concepts and controversies
Abstract The skin is regularly exposed to several environmental aggressions, including solar radiation, whose biological effects can induce sunburn, dyschromia, skin aging and cancer. Among the photoprotection measures, sunscreens comprise a relevant part of the strategy aimed to prevent solar radiation damage and, for effective action, the patient must adhe
Anais Brasileiros de Dermatologia. Publicado em: 2022
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2. Effect of Different Thermal and Non-Thermal Processing Methods on Chemical Composition, Quality Indicators and Apparent Nutrient Digestibility of Full-Fat Soybean
ABSTRACT The aim of this research was to study the effect of thermal and non-thermal processing methods on chemical composition, quality indicators and apparent digestibility of soybean nutrients. For this, four processing methods (unprocessed, extruded, thermal, and gamma radiation) were applied on two soybean varieties (Katol & Caspian). Rations were formu
Braz. J. Poult. Sci.. Publicado em: 20/12/2019
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3. Effects of Gamma Radiation on the Properties of the Thermoplastic Starch/Poly (Butylene Adipate-co-Terephthalate) Blends
The development of blends made from matrices of synthetic biodegradable polymers, and natural additives, are considered less environmentally aggressive materials. This work aimed to study the effects of gamma radiation on the properties of the thermoplastic starch (TPS)/poly(butylene adipate-co-terephthalate) (PBAT). In this work, blends of TPS/PBAT were pre
Mat. Res.. Publicado em: 14/10/2019
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4. Irrigation and Light Access Effects on Coffea arabica L. Leaves by FTIR-Chemometric Analysis
Coffee bean chemical compositions has been extensively studied. However, there is a small amount of research on other parts of the coffee plant, including leaves. Fourier transform infrared (FTIR) spectral profiles of Coffea arabica L. cv. IAPAR 59 leaf extracts from a simplex-centroid design were studied by principal component analysis (PCA) to evaluate the
J. Braz. Chem. Soc.. Publicado em: 2018-01
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5. FTIR Spectroscopy Revealing the Effects of Laser and Ionizing Radiation on Biological Hard Tissues
This work evaluated the influence of ionizing and non-ionizing irradiations on the chemical structure of hard tissues using the mid-infrared spectroscopy. Enamel, dentin and bone slabs were submitted to gamma irradiation, as well as to Nd:YAG (λ = 1064 nm) and Er,Cr:YSGG (λ = 2078 nm) laser irradiations. The composition of slabs were evaluated by the Fouri
J. Braz. Chem. Soc.. Publicado em: 2015-12
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6. Enhanced alkaline cellulases production by the thermohalophilic Aspergillus terreus AUMC 10138 mutated by physical and chemical mutagens using corn stover as substrate
Abstract A thermohalophilic fungus, Aspergillus terreus AUMC 10138, isolated from the Wadi El-Natrun soda lakes in northern Egypt was exposed successively to gamma and UV-radiation (physical mutagens) and ethyl methan-sulfonate (EMS; chemical mutagen) to enhance alkaline cellulase production under solid state fermentation (SSF) conditions. The effects of dif
Braz. J. Microbiol.. Publicado em: 2015-12
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7. Avaliação dos efeitos da radiação gama nas características físico-químicas de Kiwi (Actinídia deliciosa) cv. Hayward minimamente processado / Evaluation of the effects of gamma radiation on physicochemical characteristics of kiwi (Actinidia deliciosa) cv. Hayward minimally processed
The search for a healthy life has led consumers to rethink their eating habits, consuming fruits and vegetables in place of manufactured products, therefore, the demand for minimally processed products has evolved rapidly. The kiwi fruit (Actinidia deliciosa) has high nutritional value, being rich in C vitamin especially, which has wide acceptance in consume
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2011
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8. Evaluation of hela cell lineage response to β radiation from Holmium-166 embedded in ceramic seeds
This work studied the effects of β radiation of Ho-166 embedded in ceramic seeds on HeLa cells. Methodology consisted in the production of ceramic seeds with holmium-165 by sol-gel route. Chemical and physical characterizations of the seeds were performed. Subsequently, nuclear characterization was performed by gamma spectrometry. Experimental and theoretic
Brazilian Archives of Biology and Technology. Publicado em: 2011-10
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9. Evaluation of environmental effects of uranium mining\ s radioactive effluents on physical and chemical characteristics and diversity of the Zooplanktonic Community in the Ore Treatment Unit, Antas Dam and Bortolan Dam, Poços de Caldas (MG). / Avaliação de efeitos ambientais de efluentes radioativos de mineração de urânio sobre as características físicas, químicas e diversidade da Comunidade Zooplanctônica na Unidade de Tratamento de Minérios, Represa das Antas e Represa Bortolan, Poços de Caldas (M.G).
A represa das Antas e represa Bortolan fazem parte da Sub-Bacia Hidrográfica do Ribeirão das Antas, sendo que a primeira sofre impacto de uma mineradora de urânio (UTM/INB), uma vez que recebe despejos de efluentes radioativos tratados procedentes de DAM, já a represa Bortolan recebe maior influência da malha urbana de Poços de Caldas. O objetivo do pr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/12/2010
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10. Compatibilization and degradation study of Polypropylene/Poly(3-hydroxybutyrate) (PP/PHB) blends. / Estudo da compatibilização e da degradação de blendas polipropileno/poli (3-hidroxibutirato) (PP/PHB).
In this work Polypropylene/Poly(3-hydroxybutyrate) (PP/PHB) blend was studied. In particular the compatibilization and the influence of a previous photodegradation on the biodegradation of the blend were investigated. In order to understand the photodegradation of the blends it was also necessary to study the photodegradation of PHB. The compositions of the
Publicado em: 2010
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11. Efeitos da radiação gama nas qualidades nutricionais, sensoriais e na resistência a Lasioderma serricorne (F.) e Plodia interpunctella (H.) em grãos de soja Glycine max (L.) / Effects of the gamma radiation in nutritional, sensory qualities and resistance of Lasioderma serricorne (F.) e Plodia interpunctella (H.) in soybean grains Glycine max (L.).
With the increasement of the world population, criative strategies will be necessary to increase food prodution. To achieve this chalenge, new cultivars have been development, though different tecniques and with characteristics to improve the production. To maintain food conservation, several methods can be used. The use of Cobalto-60 radiation is a secure a
Publicado em: 2010
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12. Avaliação da efetividade de remoção de cor de soluções corantes e efluentes têxteis pelo tratamento fotocatalítico de óxidos de ferro recobertos com dióxido de titânio
This work evaluated the use of ferrites encapsuled with titanium dioxide (CoFe2O4@TiO2) for photocatalytic removal of color of dye (Methylene Blue and HRFL Drimaren Blue) solutions and textile effluents. The CoFe2O4@TiO2 and TiO2 used in the tests was synthesized according to the polymeric precursors method, and the solids obtained were characterized by X ra
Publicado em: 2010