Polyphosphate
Mostrando 13-24 de 240 artigos, teses e dissertações.
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13. Mecanismos moleculares envolvidos no controle da ingestão alimentar e do peso corporal : participação da 5PTASE IV / Involved molecular mechanisms in the control of the alimentary ingestion and the corporal weight-participation of 5PTASE IV
A enzima fosfatidilinositol 3-quinase (PI3-kinase) exerce uma importante função na transdução dos sinais anorexigênicos e termogênicos enviados pela insulina e leptina em primeira ordem aos neurônios do núcleo arqueado no hipotálamo. A cascata de sinais intracelulares gerados pela ativação da PI3-kinase depende da atividade coordenada de inositol-
Publicado em: 2006
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14. Aspectos bioquÃmicos e fisiolÃgicos do acÃmulo de polifosfato inorgÃnico por Cunninghamella elegans
Inorganic polyphosphate (PolyP) is a homopolymer of phosphate linked by phosphoanhydride bonds, first indentified a hundred years ago. This molecule is ubiquitous in nature, suggesting the PolyP envolvement in important metabolics process. The fungi are a very important group of organism showing a large application for various biotechnology areas. Despite of
Publicado em: 2005
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15. CaracterizaÃÃo BioquÃmica, FisiolÃgica e Ultraestrutural do Processo de BiossorÃÃo do Cobre por Cunninghamella elegans - UCP 542 / CaracterizaÃÃo BioquÃmica, FisiolÃgica e Ultraestrutural do Processo de BiossorÃÃo do Cobre por Cunninghamella elegans - UCP 542
The aim of this work was to evaluate the physiological, biochemical and ultrastructural aspects of C. elegans grown in copper presence. The growth profile was obtained by using biomass yields, glucose and phosphate consumption and pH. The polyphosphate profile, phosphatases activities and metal remotion were also studied. The results revealed the copper effe
Publicado em: 2004
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16. Preparação e caracterização do Sistema polifosfato misto contendo o ion Erbio
According to available published data, antimony polyphosphates have not attracted much attention from researchers. Currently polyphosphates of trivalent elements, including those of lanthanides, are widely employed in glasses suitable for light transmission within the region of telecommunication windows. In this case, the combination of antimony and rare ear
Publicado em: 2004
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17. Variação espacial nas características da água, dos sedimentos e da macrofauna bentônica em áreas urbanizadas e em unidades de conservação na Baía da Ilha de Santa Catarina.
Comparisons between urban and non-urban areas may be one method for the establishment of cause and effect relations in environmental changes provoked by urbanization in locations for which there is no historic data. The impacts of urbanization on water, sediment and the macrofaunal benthic associations were investigated using an hierarchized sample planning.
Publicado em: 2004
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18. Aluminum polyphosphate gels structural evolution probed by NMR spectroscopy
Neste trabalho é apresentada a evolução estrutural de géis de polifosfato de alumínio, desde a associação das espécies que leva à gelatinização, e prosseguindo pelas etapas de envelhecimento e secagem. As alterações nas espécies formadoras da rede foram acompanhadas por RMN de 31P e 27Al, tanto em solução quanto no estado sólido. Verificou-s
Journal of the Brazilian Chemical Society. Publicado em: 2003-12
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19. Dye incorporation in polyphosphate gels: synthesis and theoretical calculations
In this work we described theoretical calculations on the electronic structure and optical properties of the dyes crystal violet and malachite green based in semiempirical methods (Parametric Method 3 and Intermediate Neglect of Differential Overlap / Spectroscopic - Configuration Interaction) and the synthesis of a new hybrid material based upon the incorpo
Materials Research. Publicado em: 2003-06
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20. Aspectos bioquÃmicos e citoquÃmicos do polifosfato em Cunninghamella elegans
The growth profile, phosphate and glucose uptake, phosphorus content, and polyphosphate distribution, structure and location were evaluated in cunninghamella elegans grown in media containing different phosphate concetrations. The results showed a signinificant influence of the concentration of phosphate on biomass production and polyphosphate metabolism. Th
Publicado em: 2003
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21. Nanoparticulas de polifosfato de aluminio
M polyphosphates colloidal systems are versatile sources of new materials. In recent years we have demonstrated the formation of sols, gels, foams and hollow particles, by using these salts. They are formed by precipitation in aqueous media; this phase separation yields different products, depending on the actual conditions used. Particles of noncrystalline
Publicado em: 1998
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22. Gelificação termorreversivel em soluções aquosas de polifosfato de aluminio
Admixture of aqueous sodium polyphosphate solutions and aluminum salts (nitrate, sulfate and chloride) lead to the formation of thermoreversible gels. Gels formed above roam temperature change back to clear solutions, upon cooling. For some compositions, gel formation happens at roam temperature. This behavior was observed in polymeric systems, but it has no
Publicado em: 1995
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23. Degradation of Inorganic Polyphosphate in Mutants of Aerobacter aerogenes
Harold, F. M. (National Jewish Hospital, Denver, Colo.), and Ruth L. Harold. Degradation of inorganic polyphosphate in mutants of Aerobacter aerogenes. J. Bacteriol. 89:1262–1270. 1965.—Extracts of Aerobacter aerogenes contained two enzymes capable of degrading polyphosphate, polyphosphatase and polyphosphate kinase. By use of a suicide technique, a muta
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24. ACCUMULATION OF INORGANIC POLYPHOSPHATE IN AEROBACTER AEROGENES II. : Environmental Control and the Role of Sulfur Compounds
Harold, F. M. (National Jewish Hospital, Denver, Colo.) and Susan Sylvan. Accumulation of inorganic polyphosphate in Aerobacter aerogenes. II. Environmental control and the role of sulfur compounds. J. Bacteriol. 86:222–231. 1963.—The accumulation of inorganic polyphosphate in Aerobacter aerogenes was shown to be a function of the growth medium. In low-p