Polarographic Method
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Sorafenib prevents liver fibrosis in a non-alcoholic steatohepatitis (NASH) rodent model
Liver fibrosis occurring as an outcome of non-alcoholic steatohepatitis (NASH) can precede the development of cirrhosis. We investigated the effects of sorafenib in preventing liver fibrosis in a rodent model of NASH. Adult Sprague-Dawley rats were fed a choline-deficient high-fat diet and exposed to diethylnitrosamine for 6 weeks. The NASH group (n=10) rece
Braz J Med Biol Res. Publicado em: 24/02/2015
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2. Determinação de Sn(II) por polarografia: aplicação no controle de qualidade de reagentes liofilizados para radiodiagnóstico / Polarographic determination of Sn(II): application in the quality control of radiopharmaceutical reagents
Stannous chloride (SnCl2.2H2O) is the major compound used for reduction of generator-derived 99mTc-pertechnetate in cold kits for on site preparation of 99mTc-radiopharmaceuticals. These cold kits usually contain a ligand, stannous chloride, and different additives. Various techniques were described for tin determination, but they cannot distinguish between
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2008
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3. Estudo polarográfico sobre a determinação de Fe(III) utilizando-se a técnica da polarografia de pulso diferencial
A differential pulse polarographic study with the objective to determine iron (III) in presense of copper (II) in a supporting electrolyte based on citrate - EDTA was made. The best experimental conditions found were a supporting electrolyte of citrate 0.25 mol L-1, EDTA 0.050 mol L-1 and KNO3 0.50 mol L-1, pH 5.00. In this media iron (III) showed a polarogr
Química Nova. Publicado em: 2001-12
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4. Estudo polarografico de Fe(III) e Cu(II) em diversas matrizes utilizando eletrolito de suporte a base de citrato e EDTA
The polarographic determination of Fe(lll) in the presence of different species, including Cu(II), shows a characteristic: the overlapping of the peak potential of the Fe(lll) with the peak potentials of the other species. This interference can be eliminated through the addition of complexing agents like citrate, which cause the dislplacing of these potentia
Publicado em: 2001
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5. Estudos analiticos de resinas quelantes usando Amberlyst A-26 modificada com o corante Eriochrome Red B para a pre-concentração de traços de zinco e determinação por espectrometria de absorção atomica com chama
Due to the low concentration of heavy metals in environmental samples, steps for separation and pre-concentration are usually necessary. Complexing agents, particularly azo-compounds containing sulphonic groups, when sorbed on ion-exchange resins, are extremely useful in the separation of metals, acting as a chelating resin capable of sequestering metal ions
Publicado em: 1995
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6. Estudo polarografico e amperometrico do formaldeido e do acetaldeido e suas aplicações analiticas
A differential pulse polarographic method was developed for quantitative determination of formaldehyde and acetaldehyde in aqueous solutions. The aldehydes were converted to imines by reaction with primary amines (monoethanolamine (MEA) and Hexamethylenediamine (HMDA)) and the imino group was reduced at the static mercury drop electrode. A 0,10 moI/l litium
Publicado em: 1993
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7. Estudos potenciométricos sobre a formção de complexos entre índio (III) e azoteto, em meio aquoso / Potentiometric studies on the formation of indium (III) azide complexes in aqueous medium
The present study is a branch of the main work concerned with the complex formation between several metal cations and azide anion in aqueous media. Indium (III) was selected, in analogy to iron (III), because forms complexes with azide in aqueous media. Polarographic studies in development showed the tendency of these complexation. To determine the stability
Publicado em: 1986
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8. A existência de onda catalítica no sistema cobalto (II) azeteto/ácido azotídrico / Polarographic cataltytic process in azide/hydrazoic buffer in the presence of cobalt (II)
Os primeiros estudos sobre a utilização do azoteto de sódio, NaN3, como eletrólito de suporte em polarografia, revelaram a existência de onda catalítica quando o meio era acidulado, contendo HN3, na presença de íons de cobalto(II). O presente trabalho procurou esclarecer a natureza da onda catalítica com os íons de cobalto(II). Para isto foram estu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/1974
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9. Polarographic Assay of Hydrogen Peroxide Accumulation in Microbial Cultures
A method is described for determining low concentrations of hydrogen peroxide by using a polarographic oxygen electrode to measure the oxygen released into solution on addition of catalase. A sample can be assayed directly without prior manipulation in 3 min. The method is capable of assaying hydrogen peroxide concentrations as low as 7 μM. The method has p
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10. OXYGEN TENSION OF TISSUES BY THE POLAROGRAPHIC METHOD. I. INTRODUCTION: OXYGEN TENSION AND BLOOD FLOW OF THE SKIN OF HUMAN EXTREMITIES
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11. OXYGEN TENSION OF TISSUES BY THE POLAROGRAPHIC METHOD. IV. SKIN OXYGEN TENSION VS. ARTERIAL OXYGEN SATURATION; RELATIONSHIP TO OXYHEMOGLOBIN DISSOCIATION CURVE
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12. OXYGEN TENSION OF TISSUES BY THE POLAROGRAPHIC METHOD. V. THE RATE OF MOVEMENT OF OXYGEN FROM THE PERIPHERAL ARTERY TO THE SKIN 1