Physical Radiation Effects
Mostrando 1-12 de 45 artigos, teses e dissertações.
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1. Photo-Fenton-Based Degradation of Methylene Blue Dye Using Hydroxyapatite Nanoparticles Doped with Fe3O4/γ-Fe2O3
In this study, we evaluated the catalytic properties of hydroxyapatite (HA) nanoparticles (NPs) doped with Fe3O4/γ-Fe2O3 for the degradation of methylene blue (MB) dye using a photo-Fenton process at pH 2.5, 7.0, and 9.0. The HA NPs were characterized using X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectrometry, Raman spect
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. 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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3. Development and quality of pineapple guava fruit in two locations with different altitudes in Cundinamarca, Colombia
Fruit growth is stimulated by different weather conditions. The aim of this study was to determine the influence of weather conditions on the physicochemical properties of pineapple guava fruit growth. Twenty trees were marked in two production areas located at different altitudes (1,800 and 2,580 m.a.s.l.), and measurements were performed every 7 days from
Bragantia. Publicado em: 07/07/2015
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4. Chicken Meat Submitted to Gamma Radiation and Packed with or without Oxygen
The objective of this study was to evaluate the effects on gamma radiation levels on the physical and microbiological characteristics of chicken breast meat. A completely randomized experimental design in a 4x2x3 factorial arrangement was adopted. Treatments consisted of four radiation concentrations (0, 2, 4, or 8kGy), two package sealing methods (with or w
Rev. Bras. Cienc. Avic.. Publicado em: 2015-06
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5. A dose-response curve for biodosimetry from a 6 MV electron linear accelerator
Biological dosimetry (biodosimetry) is based on the investigation of radiation-induced biological effects (biomarkers), mainly dicentric chromosomes, in order to correlate them with radiation dose. To interpret the dicentric score in terms of absorbed dose, a calibration curve is needed. Each curve should be constructed with respect to basic physical paramet
Braz J Med Biol Res. Publicado em: 26/05/2015
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6. The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride)
This paper presents results describing the physical, mechanical, and thermal properties (melt flow index - MFI and oxidative induction time - OIT) of high density polyethylene and poly (vinyl chloride) after weathering exposure (6, 12, 18, and 30 months). The materials exposed were geomembranes of two thicknesses: 1.0 and 2.0 mm (PVC) and 0.8 and 2.5 mm (HDP
Mat. Res.. Publicado em: 20/08/2013
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7. Análise comparativa dos efeitos da atividade física através da mensuração de citocimas pró-inflamatórias em pulmões irradiados de ratos / Comparative analysis of the effects of physical activity through the measurement of proinflammatory cytokines in irradiated lungs of rats
As neoplasias esofágicas passíveis de tratamento por radioterapia podem induzir seqüelas clínicas importantes como a pneumonite radioinduzida e a fibrose pulmonar. É sabido que os exercícios físicos promovem uma seqüência de liberação de citocinas pró-inflamatórias, com diminuição dos efeitos deletérios das desordens cardiovasculares e promo�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/01/2012
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8. 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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9. Efeito da radiação ionizante em diferentes tipos de farinhas utilizadas em tecnologia de panificação / Ionizing radiation efect on different types of flours used in bakery technology
O presente trabalho teve como objetivo avaliar as alterações causadas pela radiação ionizante em diferentes tipos e quantidades de produtos ricos em amido (farinhas de trigo, de mandioca, centeio, trigo integral, polpa de banana verde e milho) nas características reológicas, tecnológicas, físicas e de textura. As amostras foram irradiadas em fonte de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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10. 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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11. Evaluation of effects of photooxidized Vespa orientalis venom on memory and learning in rats
Wasp venom is mixture of complex proteins that have several physical and pharmacological properties. The photochemical detoxification of Vespa orientalis venom is expected to generate photooxidized venom sac extract (PVSE). Antigenically active PVSE is obtained by exposing the venom sac extract (VSE) of Vespa orientalis to ultraviolet radiation in the presen
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2011
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12. 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