Mercury Ii
Mostrando 13-24 de 128 artigos, teses e dissertações.
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13. ESTUDO DAS ALTERAÇÕES COMPORTAMENTAIS E BIOQUÍMICAS INDUZIDAS PELA EXPOSIÇÃO AO Hg (II) SOBRE O SISTEMA ANTIOXIDANTE E VIAS DE SINALIZAÇÃO CELULAR EM Drosophila melanogaster / STUDY OF BEHAVIORAL AND BIOCHEMICAL ALTERATIONS INDUCED BY Hg (II) EXPOSURE) ON ANTIOXIDANT SYSTEM AND CELL SIGNALING PATHWAYS IN Drosophila melanogaster
O Mercúrio (Hg) é em um metal pesado de relevância toxicológica cuja contaminação ambiental decorre principalmente de atividades antropogênicas. Dentre os mecanismos moleculares envolvidos na toxicidade do Hg estão um aumento na produção de espécies reativas de oxigênio, diminuição na atividade de enzimas antioxidantes e modulação da fosforil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
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14. Influence of seasonality on the interaction of mercury with aquatic humic substances extracted from the Middle Negro River Basin (Amazon)
As elevadas concentrações de mercúrio em diferentes matrizes ambientais na Amazônia têm sido atribuídas a atividades mineradoras. Entretanto, altas concentrações de mercúrio também estão presentes no solo e na água em locais como a Bacia do médio Rio Negro, distantes de fontes emissoras antropogênicas. A região Amazônica é caracterizada por
J. Braz. Chem. Soc.. Publicado em: 25/09/2012
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15. Toxic effects of mercury, lead and gadolinium on vascular reactivity
Heavy metals have been used in a wide variety of human activities that have significantly increased both professional and environmental exposure. Unfortunately, disasters have highlighted the toxic effects of metals on different organs and systems. Over the last 50 years, the adverse effects of chronic lead, mercury and gadolinium exposure have been undersco
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-09
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16. Avaliação da porosidade de microcápsulas contendo proteína bioativa por porosimetria de mercúrio e adsorção de nitrogênio
Microcapsules containing lactoferrin were produced by spray drying using dextrin:octenylsuccinate starch, as wall materials. Porosity characteristics of spray-dried microcapsules were investigated by mercury intrusion porosimetry and nitrogen adsorption. The outer and inner structures of microcapsules were studied by Scanning Electron Microscopy and sizes we
Química Nova. Publicado em: 2011-09
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17. Arsenic and Mercury mobility in brazilian sediments from the São Francisco River Basin
Os sedimentos possuem propriedades de acumulação de poluentes e a determinação de elementos tóxicos nessas amostras permite avaliar o seu ciclo geoquímico. Arsênio e mercúrio foram determinados em 28 amostras de sedimento da Bacia do Rio São Francisco, Minas Gerais, Brasil, por geração de hidretos acoplada à espectrometria de absorção atômica
Journal of the Brazilian Chemical Society. Publicado em: 2011-05
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18. Acute intraperitoneal mercury chloride contamination and distribution in liver, muscle and gill of a neotropical fish Hoplias malabaricus (BLOCK, 1794)
The present study investigated with the distribution of mercury chloride in muscle, liver and gills of Hoplias malabaricus contaminated through intraperitoneal injection (6 µg in 0.1mL of PBS) for a period of 24, 48, 72 and 96h. The liver, gill and muscle were analyzed for mercury content in an ICP/AES (Varian Liberty II) with vapor generating accessory (VG
Brazilian Archives of Biology and Technology. Publicado em: 2011-04
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19. Avaliação da sorção de Cu (II) e Hg (II) pela Sargassum sp modificado com epicloridrina / Evaluation of the sorption of Cu (II) and Hg (II) by sargassum sp modifiers with epichlorohydrin
É crescente o aumento da preocupação do homem com a contaminação de ambientes aquáticos uma vez que da subsistência dos mesmos depende o bem estar de todos. Ao mesmo tempo em que cresce a preocupação tem aumentado a quantidade de pesquisas em busca de tecnologias alternativas ao tratamento e remediação de efluentes aquosos contaminados pelas mais
Publicado em: 2011
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20. Titrimetric and spectrophotometric assay of bupropion hydrochloride in pharmaceuticals using mercury(II) nitrate
Two simple, rapid and accurate methods for the determination of bupropion hydrochloride (BUP) in pure and in pharmaceutical preparations are described. Both methods are based on the measurement of the chloride of its hydrochloride. In the titrimetric method, the chloride content of bupropion hydrochloride is determined by titrating with mercury(II)nitrate us
Eclética Química. Publicado em: 2010-09
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21. Adsorption of mercury (II) from liquid solutions using modified activated carbons
Mercury is one of the most toxic metals present in the environment. Adsorption has been proposed among the technologies for mercury abatement. Activated carbons are universal adsorbents which have been found to be a very effective alternative for mercury removal from water. The effectiveness with which a contaminant is adsorbed by the solid surface depends,
Materials Research. Publicado em: 2010-06
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22. Evaluation techniques coupled to mass spectrometry (ICP-MS) aimed at the fractionation and chemical speciation of mercury in blood and plasma / Avaliação de técnicas acopladas à espectrometria de massas com plasma (ICP-MS) visando o fracionamento e a especiação química de mercúrio em sangue e plasma
Mercury (Hg) is one of the most toxic environmental pollutants. It exists primarily in three forms: elemental mercury (Hg0), or metallic mercury, inorganic mercury (Hg-i), particularly mercuric chloride and organic mercury (Hg-o), mainly represented by methylmercury (MeHg) and ethylmercury (EtHg), and the organic forms of mercury are more toxic than the inor
Publicado em: 2010
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23. Síntese e caracterização estrutural do ligante isatina-3-(N4-benziltiossemicarbazona) e do seu complexo de mercúrio(II)
The reaction of 4-(phenyl)thiosemicarbazide with isatin yielded a new ligand, isatin-3-(N4-benzylthiosemicarbazone). Isatin-3-(N4-benzylthiosemicarbazone) deprotonated in ethanol/KOH reacts with an ethanolic solution of Hg(NO3)2 to give a mercury complex. The compounds were characterized by IR and X-ray single crystal structure determination. The X-ray studi
Química Nova. Publicado em: 2010
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24. Desenvolvimento de procedimento analítico empregando multicomutação em fluxo para determinação fotométrica de cloreto em amostras de coque de petróleo / Development of analytical procedure employing multicommutation for photometric determination of chloride in petroleum coke
In this work was developed an analytical procedure employing multicommutation for the photometric determination of chloride in petroleum coke. The procedure was based on the photometric method described on Stand Method, where the reaction between mercury(II) thyocyanate and chloride causes the displacement of the thyocyanate ions, which reacted with iron(III
Publicado em: 2010