Mostrando ítems 1-10 de 548
Redução da espessura da chapa de alumínio pela utilização de hidróxido de sódio: uma revisão
(Revista Eletrônica de Educação e Ciência, 2012) [Artigo]
The purpose of this literature review was to analyze the process of reducing the thickness of aluminum solution of sodium hydroxide basing the chemical reactions involved in the process. The main considerations of revision ...
Toxic effects of nickel exposure on heart and liver of rats
(Toxic Substance Mechanisms, 1997-07-10) [Artigo]
The role of air pollution as a health risk factor is of special interest. Numerous toxic pollutants, such as nickel, are being released to the environment as a result of combustion of fossil fuels, crude oil, and coal. ...
Toxic mechanism of cadmium exposure on cardiac tissue
(Toxic Substance Mechanisms, 2000-12-01) [Artigo]
The presence of toxic substances in the workplace environment requires systematic evaluation of exposure and health status in exposed subjects. Cadmium is a highly toxic element found in water. Although free mediated ...
Iron determination by FAAS in fish feed and feces after ultrasound-assisted extraction
(Sensing and Instrumentation for Food Quality and Safety, 2009-01-01) [Artigo]
This paper proposes a method to determine iron in samples of fish feed and feces using ultrasound in the extraction of the analyte and in subsequent quantification by flame atomic absorption spectrometry. Using HCl 0.10 ...
Oxigênio dissolvido (OD), demanda bioquímica de oxigênio (DBO) e demanda química de oxigênio (DQO) como parâmetros de poluição no ribeirão Lavapés/Botucatu - SP
(Eclética Química, 1997-01-01) [Artigo]
Oxigênio dissolvido (OD), demanda bioquímica do oxigênio (DBO) e demanda química do oxigênio (DQO) foram utilizados como parâmetros para se avaliar o grau e capacidade de autodepuração do ribeirão Lavapés, que atravessa a ...
Metal ions bound to the human milk immunoglobulin A: Metalloproteomic approach
(Food Chemistry, 2015-01-01) [Artigo]
The presence of calcium, iron, and zinc bound to human milk secretory IgA (sIgA) was investigated. The sIgA components were first separated by two-dimensional polyacrylamide gel electrophoresis and then identified by ...
Electron impact and chemical ionization mass spectral analyses of methyl esters species of free mycolic acid fraction from Rhodococcus lentifragmentus
(Chemistry and Physics of Lipids, 1996-09-30) [Artigo]
The free mycolic acid fraction from Rhodococcus lentifragmentus was derivatized to methyl esters and further fractionated into saturated (F-0), monounsaturated (F-1) and diunsaturated (F-2) species using argentation-TLC. ...
EFFECT OF POTASSIUM AND SODIUM-IONS ON GERMINATION PHASE OF SUNFLOWER SEEDS (HELIANTHUS-ANNUUS L)
(Phyton-international Journal of Experimental Botany, 1979-01-01) [Artigo]
The azomethine-H modified colorimetric method of boron determination at fertilizers.
(Eclética Química, 1996-01-01) [Artigo]
The present work studied the azomethine-H colorimetric method for boron determination to fertilizers analysis applications. The reagent azomethine-H needs lights conditions of reaction that, jointed to the big sensibility ...
Efeito mutagênico do edetato de cobre ([Cu(EDTA)]-2) livre e nanoencapsulado em camundongos e peixes
(Journal of the Brazilian Society of Ecotoxicology, 2013) [Artigo]
Recent studies show that copper complexes with ethylenediaminetetraacetic acid ([Cu(EDTA)]-2), is lethal for Aedes aegypti larvae. This compound may have a controlled release when nanocapsules complex in gum/gelatin/chitosan, ...