Contaminant Ions
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Cachaça Production in Brazil and its Main Contaminant (Ethyl Carbamate)
ABSTRACT This review aims to demonstrate the possible formation of Ethyl carbamate (EC) in different production stages of cachaça. EC is a carcinogen confirmed in animal experiments and possibly carcinogenic to humans. EC incidence below relevant health limits naturally affects many fermented foods and beverages. Concentrations above 1 mg L–1 are often de
Sci. agric. (Piracicaba, Braz.). Publicado em: 02/09/2019
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2. FTIR study of aquamarines after gamma irradiation, heat treatment and electrodiffusion
Abstract Beryl, Be3Al2(SiO3)6, is a natural gemstone with many colors. Some of these colors can be induced or modified by exposure to ionizing radiation, by heating, and maybe by electrodiffusion. Small contents of chromophore chemical elements are related to the colors of beryl, like iron, chromium, vanadium, manganese, and others. There is great interest i
REM, Int. Eng. J.. Publicado em: 2017-09
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3. Aplicação da técnica de eletrodiálise no tratamento de efluentes de tingimento de gemas contendo íons nitrato e cromo
The dyeing agate employs large quantities of potentially harmful wastewater to the environment, such as, effluent with chromium and nitrate ions. The aim of the present study was investigate the electrodialysis technique efficiency in the removal of contaminant ions present in wastewater generated by the agate dyeing industry and evaluate the toxicity of the
Quím. Nova. Publicado em: 2016-12
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4. ACIDIC REMOVAL OF METALS FROM FLUIDIZED CATALYTIC CRACKING CATALYST WASTE ASSISTED BY ELECTROKINETIC TREATMENT
AbstractOne of the main uses of catalysts in the oil industry is in the fluidized catalytic cracking process, which generates large quantities of waste material after use and regeneration cycles and that can be treated by the electrokinetic remediation technique, in which the contaminant metals are transported by migration. In this study, deactivated FCC cat
Braz. J. Chem. Eng.. Publicado em: 2015-06
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5. Estudo da influência de íons contaminantes na flotação de apatita em coluna
Elemento insubstituível para a vida, o fósforo constitui o principal componente da apatita, mineral presente na rocha fosfática. O crescente aumento da produtividade na agricultura não seria possível sem o uso dos fertilizantes. Entretanto, por ser um recurso não-renovável, o fósforo está suscetível ao esgotamento. A exploração dos depósitos eco
Publicado em: 2010
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6. Biossorção de cádmio por linhagens de Aspergillus sp / Biosorption of cadmium by Aspergillus sp. strains
The heavy metals represent the major industrial residues contaminant of soils, plants and animals in the ecosystems, causing a toxic effect to humans, mainly due to the wide spread distribution in environment which is intensified by industrialization process. One of most toxics heavy metals is cadmium, commonly used in industrial process, what make it an imp
Publicado em: 2006
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7. 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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8. Purificação de imunoglobulina G a partir do plasma ou soro humano utilizando cromatografia de afinidade com ions metalicos imobilizados
Purification of plasma proteins through selective methods, such as cromatography, has been recognised in nowadays as an important operation by pharmaceutical industry as the highly purified proteins reduce side effects. Therefore, the development of purificaton selective methods for large scale operations are extremely important to broad diversity, improve t
Publicado em: 1999
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9. Especiação de mercurio em solos contaminados por analise de termodessorção acoplada a absorção atomica
An equipment based on thermal release of mercury in solid samples was built and optimised. lt consists basically of an oven (a quartz rube wrapped in a Ni-Cr coil), coupled to an atomic absorption spectrophotometer (AAS). The output of the coupled system is a thermogram, i. e., absorbance readings as a function of temperature. The thermal release analysis wa
Publicado em: 1996
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10. Contaminant bioavailability in soils, sediments, and aquatic environments
The aqueous concentrations of heavy metals in soils, sediments, and aquatic environments frequently are controlled by the dissolution and precipitation of discrete mineral phases. Contaminant uptake by organisms as well as contaminant transport in natural systems typically occurs through the solution phase. Thus, the thermodynamic solubility of contamin
The National Academy of Sciences.
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11. Fe-catalyzed cleavage of the α subunit of Na/K-ATPase: Evidence for conformation-sensitive interactions between cytoplasmic domains
Incubation of Na/K-ATPase with ascorbate plus H2O2 produces specific cleavage of the α subunit. Five fragments with intact C termini and complementary fragments with intact N termini were observed. The β subunit is not cleaved. Cleavages depend on the presence of contaminant or added Fe2+ ions, as inferred by suppression of cleavages with nonspecific metal
The National Academy of Sciences of the USA.
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12. Tagging Retrovirus Vectors with a Metal Binding Peptide and One-Step Purification by Immobilized Metal Affinity Chromatography
Retroviral vectors produced from packaging cells are invariably contaminated by protein, nucleic acid, and other substances introduced in the manufacturing process. Elimination of these contaminants from retroviral vector preparations is helpful to reduce unwanted side effects, and purified vector preparations are desirable to improve reproducibility of ther
American Society for Microbiology.