Liquid Scintillation
Mostrando 1-12 de 93 artigos, teses e dissertações.
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1. Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition
RESUMO: Os adjuvantes, como os óleos minerais, são amplamente utilizados na aplicação de herbicidas por reduzir a deriva e a evaporação das gotas, bem como por aumentar a absorção do herbicida pela planta. Contudo, pouco se sabe como o óleo mineral se comporta quando em contato com o solo. Assim, o objetivo desta pesquisa foi avaliar o transporte de
Planta daninha. Publicado em: 17/10/2019
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2. Persistence of malathion used in dengue control on household surfaces
RESUMO: A dengue é uma infecção viral transmitida pelo mosquito Aedes aegypti. No Brasil, um dos inseticidas utilizados para controlar o mosquito é o malathion, que pode ser diluído em óleo vegetal (1:2 v/v). O objetivo deste trabalho foi avaliar a permanência do malathion em diferentes superfícies e no solo. As superfícies foram contaminadas com ma
Arq. Inst. Biol.. Publicado em: 15/08/2019
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3. Translocation and Root Exudation of Glyphosate by Urochloa brizantha and its Transport on Sugarcane and Citrus Seedlings
RESUMO: O glyphosate é facilmente exsudado pelas raízes das plantas. No entanto, ainda falta informação na literatura científica sobre a braquiária (Urochloa brizantha) é capaz de exsudar o glyphosate a ponto de influenciar o crescimento de culturas, como cana-de-açúcar e citros. Assim, o objetivo desta pesquisa foi avaliar a translocação e exsuda
Planta daninha. Publicado em: 06/05/2019
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4. Atrazine degradation patterns: the role of straw cover and herbicide application history
ABSTRACT: In Brazil, atrazine (ATZ) is widely applied to maize (Zea mays L.) fields for weed control. The presence of ATZ and its metabolites in soil and water matrices has become a matter of some concern for governmental authorities as well as for society at large. This study evaluated the patterns of ATZ degradation (mineralization, extractable and non-ext
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-02
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5. Desenvolvimento de tecnologias de preparo de geradores de 90Sr/90Y na Diretoria de Radiofarmácia do IPEN/CNEN-SP / Development of technology for the preparation of 90Sr/90Y generators at the radiopharmacy directory of IPEN / CNEN-SP
90Y (T1/2 = 2,67 dias; Eβmáx = 2,28 MeV) é um radionuclídeo com eficácia estabelecida para diversas terapias de câncer, marcando biomoléculas e no tratamento da radiosinovectomia. Devido às suas propriedades nucleares, é obtido através do decaimento do 90Sr (T1/2 = 28 anos), na forma de um gerador. Vários tipos de geradores de 90Sr/90Y foram d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/10/2010
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6. Retinol-induced changes in the phosphorylation levels of histones and high mobility group proteins from sertoli cells
Chromatin proteins play a role in the organization and functions of DNA. Covalent modifications of nuclear proteins modulate their interactions with DNA sequences and are probably one of the multiple factors involved in the process of switch on/off transcriptionally active regions of DNA. Histones and high mobility group proteins (HMG) are subject to many co
Publicado em: 2010
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7. Sistema ambiental aplicado á liberação de efluente radioativo líquido / ENVIRONMENTAL SYSTEM APPLIED TO RADIOACTIVE LIQUID EFFLUENT RELEASE
The current environmental administration considers the productive activity as an environmental system, defined as a group of processes, interactions, parameters and factors involved in the production. This mastering dissertation evaluated the release of the liquid radioactive effluents at Instituto de Pesquisas Energética e Nucleares (ipen), under a systemi
Publicado em: 2009
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8. Soil mineralogy and sedimentary environment in mangroves of São Paulo State / Mineralogia de solos e ambientes de sedimentação em manguezais do Estado de São Paulo
Mangroves are formed by groups of trees and shrubs that develop in the intertidal zone of tropical regions. This ecosystem to establish in the interface of both marine and continental environment, present its formation related to the sea-level fluctuations during the quaternary period, where the terrigenous and marine sediments are deposited in rivers valley
Publicado em: 2006
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9. Emissão de 14C pelas unidades I e II da Central Nuclear Almirante Álvaro Alberto (CNAAA) e seu efeito local nos níveis ambientais
14 C is a is a long-lived beta-emitting nuclide (T = 5730 years) produced naturally 1/2 14 14 14 in the upper atmosphere as a result of reactions between neutrons and stable N( N(n,p) C). 14 C as well during their routine Although in a lesser extent, nuclear power plants produce 14 operation. Since it is converted in CO and mixed throughout the atmosphere, i
Publicado em: 2006
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10. Datação radiocarbônica de sítios arqueológicos do tipo sambaqui pela técnica de absorção de CO2: uma alternativa à síntese benzênica
The sambaquis are archaeological sites with remains of pre-historical Brazilian civilizations. They look like small hills containing different kinds of shells, animal and fish bones, small artifacts and even human skeletons. Since the sambaqui sites in the Rio de Janeiro state are younger than 6000 years, the applicability of CO2 absorption on Carbo-Sorb® a
Química Nova. Publicado em: 2004-04
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11. Comparison of the efficacy of biodegradable and non-biodegradable scintillation liquids on the counting of tritium- and [14C]-labeled compounds
The widespread use of ³H and 14C in research has generated a large volume of waste mixed with scintillation liquid, requiring an effective control and appropriate storage of liquid radioactive waste. In the present study, we compared the efficacy of three commercially available scintillation liquids, Optiphase HiSafe 3, Ultima-Gold™ AB (biodegradable) and
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-12
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12. The influence of fasting/refeeding on the lipoprotein lipase activity of adipose tissue and muscle
Lipoprotein lipase activity in adipose tissue and muscle is modulated by changes in the pattern of food intake. We have measured total lipoprotein lipase activity in adipose tissue and muscle of male Wistar rats (N = 6-10), weighing 200-250 g (~12 weeks), during the refeeding/fasting state following 24 h of fasting. Lipoprotein lipase activity in tissue homo
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-11