Inorganic Constituent
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. ARSÊNIO E ARROZ: TOXICIDADE, METABOLISMO E SEGURANÇA ALIMENTAR
Arsenic is considered a semimetal, and its wide distribution in the Earth's crust in different chemical forms, including organic and inorganic species, has a great deal of influence on the mechanisms of toxicity. Exposure to arsenic can be either through occupational practice (use of pesticides) or by the consumption of water and food containing the element.
Quím. Nova. Publicado em: 2015-01
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2. Avaliação de tecnicas de decomposição enzimatica e fotolise oxidativa no preparo de mel para analise por espectrometria de emissão optica em plasma de argonio com acoplamento / Evaluation of techniques of enzymatic decomposition and oxidative photolysus in honey sample preparation for the analysis by inductively coupled plasma optical emission spectrometry
A determinação de elementos metálicos em alimentos ricos em açúcar é um desafio analítico devido a interferência da matriz. Diluições das amostras podem minimizar este efeito, por outro lado, podem reduzir as concentrações dos elementos metálicos abaixo do limite de detecção. Assim, o pré-tratamento é usualmente necessário para destruir ou
Publicado em: 2009
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3. Filmes híbridos orgânico-inorgânicos a partir de óleo de soja funcionalizado
Organic-inorganic hybrids materials can be prepared by the sol-gel process and have applications in biomaterials, catalysis, optics, membranes, chromatography, electrochemistry and coatings. Vegetable oils can be used as organic component for the preparation of these materials and, as they are biodegradable and obtained from natural and renewable sources, th
Publicado em: 2006
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4. INVESTIGAÇÃO SOBRE A FORMAÇÃO DE ESPÉCIES DE ARSÊNIO ORGÂNICO EM SOLUÇÕES DE NUTRIÇÃO PARENTERAL
Parenteral nutrition is the nutrients administration by intravenous mean in patients who cannot consume them for gastrointestinal way. Parenteral Nutrition Solutions are stored in glass and plastic containers, being the glass the most used due to its rigid structure, chemical resistance, sterilization easiness and transparency. Among glass constituents is th
Publicado em: 2006
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5. QUANTITATIVE STUDIES ON GLYCOLYTIC ENZYMES IN LACTOBACILLUS PLANTARUM I. : Concentration of Inorganic Ions and Coenzymes in Fermenting Cells
Mizushima, Shôji (University of Tokyo, Tokyo, Japan), Yoshiaki Machida, and Kakuo Kitahara. Quantitative studies on glycolytic enzymes in Lactobacillus plantarum. I. Concentration of inorganic ions and coenzymes in fermenting cells. J. Bacteriol. 86:1295–1300. 1963.—An attempt was made to summarize the intracellular conditions of Lactobacillus plantarum
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6. Sites of metal deposition in the cell wall of Bacillus subtilis.
Amine and carboxyl groups of the cell wall of Bacillus subtilis were chemically modified individually to neutralize their electrochemical charge for determination of their contribution to the metal uptake process. Mild alkali treatment removed ca. 94% of the constituent teichoic acid (expressed as inorganic phosphorus) and allowed estimation of metal interac
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7. Sulfate Reduction in Peat from a New Jersey Pinelands Cedar Swamp †
Microbial sulfate reduction rates in acidic peat from a New Jersey Pine Barrens cedar swamp in 1986 were similar to sulfate reduction rates in freshwater lake sediments. The rates ranged from a low of 1.0 nmol cm−3 day−1 in February at 7.5- to 10.0-cm depth to 173.4 nmol cm−3 day−1 in July at 5.0- to 7.5-cm depth. The presence of living Sphagnum moss
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8. Targeted ablation of Fgf23 demonstrates an essential physiological role of FGF23 in phosphate and vitamin D metabolism
Inorganic phosphate is essential for ECM mineralization and also as a constituent of important molecules in cellular metabolism. Investigations of several hypophosphatemic diseases indicated that a hormone-like molecule probably regulates serum phosphate concentration. FGF23 has recently been recognized as playing important pathophysiological roles in severa
American Society for Clinical Investigation.
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9. Roles of porphyrins and host iron transport proteins in regulation of growth of Porphyromonas gingivalis W50.
Porphyromonas gingivalis (Bacteroides gingivalis) requires iron in the form of hemin for growth and virulence in vitro, but the contributions of the porphyrin ring structure, porphyrin-associated iron, host hemin-sequestering molecules, and host iron-withholding proteins to its survival are unknown. Therefore, the effects of various porphyrins, host iron tra
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10. The anomaly of silicon in plant biology.
Silicon is the second most abundant element in soils, the mineral substrate for most of the world's plant life. The soil water, or the "soil solution," contains silicon, mainly as silicic acid, H4SiO4, at 0.1-0.6 mM--concentrations on the order of those of potassium, calcium, and other major plant nutrients, and well in excess of those of phosphate. Silicon
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11. Comparison of nifH Gene Pools in Soils and Soil Microenvironments with Contrasting Properties
The similarities and differences in the structures of the nifH gene pools of six different soils (Montrond, LCSA-p, Vernon, Dombes, LCSA-c, and Thysse Kaymor) and five soil fractions extracted from LCSA-c were studied. Bacterial DNA was directly extracted from the soils, and a region of the nifH gene was amplified by PCR and analyzed by restriction. Soils we
American Society for Microbiology.
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12. Changes of intracellular milieu with fatigue or hypoxia depress contraction of skinned rabbit skeletal and cardiac muscle.
1. Maximal calcium-activated force (Fmax) and calcium sensitivity were markedly decreased in detergent-skinned fibres from skeletal and cardiac muscle by solutions that mimicked the total milieu changes associated with fatigue and hypoxia. Further experiments determined the relative contribution of each of the individual changes in milieu. 2. Both Ca2+ sensi