Inorganic Contaminant
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. A quality assessment of titanium castings produced in an experimental short-heating-cycle investment
The aim of this study was to evaluate the quality of casting produced in an experimental short-term heating-cycle investment. Thus, reaction layer and castability of titanium casting using an experimental spinel-based investment (VR) with short heating cycle were compared with the commercial short-heating-cycle spinel-based investment Trinell (TR), the silic
Mat. Res.. Publicado em: 03/12/2013
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2. Sorção de nitrato em carvão ativado tratado com CaCl2 : estudo de ciclos de sorção/regeneração
Nitrate (NO-3) is an inorganic ion which is present naturally in the environment, being the most stable form of oxidized nitrogen. Due to its high solubility in water, it is possibly the groundwater contaminant more widespread in the world, causing problems in the production of drinking water and ecological disturbances. In this context, the objective of thi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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3. Eletroforese capilar com detecção condutométrica sem contato aplicada à avaliação da qualidade de biocombustíveis (biodiesel e etanol) e ao estudo sobre os processos de oxidação do biodiesel / Capillary electrophoresis with capacitively coupled contactless conductivity detection applied to evaluating the quality of biofuels (biodiesel and ethanol) and the study of the oxidation processes of biodiesel
No presente trabalho, métodos analíticos empregando a eletroforese capilar com detecção condutométrica sem contato CE - C4D foram desenvolvidos para a determinação de diversas espécies no biodiesel e etanol combustível. A concentração das espécies inorgânicas (Na+, K+, Ca2+, Mg2+, SO4 2- e PO4 3-) e glicerol no biodiesel são de interesse das ag
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/09/2011
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4. Polyphenols of Mangifera indica modulate arsenite-induced cytotoxicity in a human proximal tubule cell line
Inorganic arsenic is an ubiquitous environmental contaminant able to cause severe pathologies in humans, including kidney disorders. The possible protective effects of Mangifera indica L., Anacardiaceae, stem bark extract (MSBE) and some mango phenols on the cytotoxicity of arsenite (AsIII) in the proximal tubule cell line HK-2 was investigated. In cells cul
Revista Brasileira de Farmacognosia. Publicado em: 23/11/2011
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5. Ozonation of sediments from an urban lake: an exploratory investigation
An exploratory investigation was conducted on the effects of application of ozone on the removal of organic and inorganic contaminants and the reduction of settleable solids in urban lake sediments. Homogenized sediment samples were treated in a batch reactor with an external recirculation loop and ozone feed from a Venturi injector. The ozone generating sys
Brazilian Journal of Chemical Engineering. Publicado em: 2011-09
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6. Avaliação da remoção de sulfeto de hidrogênio do gás natural em uma coluna de absorção
Natural gas, although basically composed by light hydrocarbons, also presents in its composition gaseous contaminants such as CO2 (carbon dioxide) and H2S (hydrogen sulfide). Hydrogen sulfide, which commonly occurs in oil and gas exploration and production activities, besides being among the gases that are responsible by the acid rain and greenhouse effect,
Publicado em: 2009
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7. 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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8. Migração de íons inorgânicos em alguns solos tropicais, com ênfase nos processos de sorção e difusão molecular / Migration of inorganic chemicals in some tropical soils: sorption and molecular diffusion
É crescente a demanda por materiais que atendam as exigências para construção de barreiras selantes (liners) em obras para disposição de resíduos. A utilização de solos tropicais para esta finalidade só não é maior por falta de conhecimento sobre muitas de suas características técnicas, principalmente a migração de contaminantes. Tentativas d
Publicado em: 2001
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9. Eletrochemical techniques for particulate system decontamination treatments. / Avaliação da técnica de eletroosmose na remoção de contaminante orgânico em meios particulados.
The use of electrochemical techniques is probably one of most promising technology for particulate system decontamination treatments. This methodology appears as able to remove heavy metals, radionucletides and organic and inorganic contaminations. By using an electric potential difference with low currents intensities through electrodes, the contaminants in
Publicado em: 2001
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10. Sulfhydryl Group Involvement in Plasmalemma Transport of HCO3− and OH− in Chara corallina1
The effect of the sulfhydryl reagents (—SH) p-chloromercuribenzene-sulfonic acid (PCMBS), N-ethylmaleimide (NEM), and inorganic mercury on H14CO3− assimilation in Chara corallina is reported. Commercial grade PCMBS caused severe inhibition of H14CO3− assimilation. Results obtained using purified PCMBS (stock solution passed through a chelating resin) i
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11. Fourteen-year survival of Pseudomonas cepacia in a salts solution preserved with benzalkonium chloride.
A strain of Pseudomonas cepacia that survived for 14 years (1963 to 1977) as a contaminant in an inorganic salt solution which contained commercial 0.05% benzalkonium chloride (CBC) as an antimicrobial preservative, was compared to a recent clinical isolate of P. cepacia. Ammonium acetate was present in the concentrated stock CBC solution, and served as a ca
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12. 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