Polyphosphate
Mostrando 1-12 de 240 artigos, teses e dissertações.
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1. Determining the effects of encapsulated polyphosphates on quality parameters and oxidative stability of cooked ground beef during storage
Abstract Effects of encapsulated (e) sodium tripolyphosphate (STP), sodium pyrophosphate (SPP) and various combinations of encapsulated and un-encapsulated (u) forms of these polyphosphates on lipid oxidation in the cooked ground beef during storage (0, 1, 7 d at 4 0C) were determined. pH, color, cooking loss (CL), thiobarbituric acid reactive substances (T
Food Sci. Technol. Publicado em: 14/11/2018
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2. Fracionamento de polifosfato de sódio e caracterização por RMN de 31P: um experimento para aulas de físico-química
This text describes an experiment on fractional precipitation of a polymer together with determination of average degree of polymerization by NMR. Commercial sodium polyphosphate was fractionated by precipitation from aqueous solution by adding increasing amounts of acetone. The polydisperse salt and nine fractions obtained from it were analyzed by 31P Nucle
Química Nova. Publicado em: 2010
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3. Proteínas quinases envolvidas na regulação do estresse em Trypanosoma. / Protein kinases involved in stress regulation in Trypanosoma.
Protozoa of the genus Trypanosoma have a complex life cycle alternating between vertebrate and invertebrate hosts. The adaptation to different environmental conditions requires rapid changes in gene expression to fill up the morphological and metabolic requirements for survival. Very little is known about the mechanisms that control these changes and the sig
Publicado em: 2010
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4. Degradation kinetics of calcium polyphosphate bioceramic: an experimental and theoretical study
In this work, the degradation kinetics of calcium polyphosphate bioceramic was studied. Liquid state31P nuclear magnetic resonance (NMR), X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the product. The in vitro degradation test was carried out at 37 ºC for up to 48 hours for both the simulation solution and the extr
Materials Research. Publicado em: 2009
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5. Polyphosphate Gels Applied to Electrochemical Devices Assembling / AplicaÃÃo de gÃis de polifosfatos à construÃÃo de dispositivos eletroquÃmicos
Hybrid materials between aluminum and iron polyphosphate gels, polyaniline and carbon materials were synthesized and were used as electrode materials to assemble electrochemical devices. The aluminum and iron polyphosphate gels, the carbon materials as well as the hybrids obtained between these materials and polyaniline were characterized by thermogravimetri
Publicado em: 2008
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6. Polyphosphate hybrid materials: photochemistry, (di)electric characterization and its application in electrochemical capacitors / Materiais hÃbridos de polifosfatos: fotoquÃmica, caracterizaÃÃo (di)elÃtrica e sua utilizaÃÃo em capacitores eletroquÃmicos
The synergy between the properties of two substances, an organic and another inorganic, can be obtained in a single material by the sol-gel process. The low temperature processing allow the incorporation of organic substances in inorganic matrices. These hybrid materials can have covalent interactions between host and guest (C1), or weak interactions, like v
Publicado em: 2008
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7. Proteoma e transcriptoma comparativo das glândulas salivares de barbeiros das espécies de Rhodnius brethesi, Rhodnius robustus e Panstrongylus megistus
Chagas disease caused by the protozoan Trypanosoma cruzi is mostly transmitted by the triatomine bug and causes over 17 million infections in Latin America. More than 140 species of triatomines were described. The Rhodnius gender comprises almost half of the triatomines found in the Amazon Basin, as Rhodnius brethesi and Rhodnius robustus, normally these ins
Publicado em: 2008
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8. Espectroscopia Ãptica nÃo linear de vidros especiais e colÃides
Nonlinear optical properties of special glasses and colloids were studied using the zscan technique. This technique aalows to calculate the nonlinear refraction index and the nonlinear absorption coefficient using the self-focusing or defocusing effect that appears when the incident laser pass through a nonlinear medium. Orthophosphate and polyphosphate anti
Publicado em: 2008
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9. Análises de fontes de fósforo na nutrição animal: técnicas nucleares e correlatas em estudos com coelhos
The first goal of this study was to assess inorganic and radiological aspects of eight different phosphorus sources: calcinated bone meal (FAR), dicalcium phosphate (BIC), super triple phosphate (FST), super simple phosphate (FSS), monoammonium phosphate (FMA), sulphur amonium phoshphate (FSA), ammoniated calcium polyphosphate (POLI) and a bovine mineral sup
Publicado em: 2008
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10. ConstruÃÃo de uma cÃmara de fotoestabilidade, estudo da fotodegradaÃÃo da vitamina A e da aÃÃo antioxidante do polifosfato de sÃdio em misturas de nutriÃÃo parenteral
A incidÃncia direta ou indireta da luz visÃvel e ultravioleta nas preparaÃÃes de nutriÃÃo parenteral induz a fotodegradaÃÃo de seus componentes, dentre eles as vitaminas. HÃ diversos estudos que relatam a fotossensibilidade das vitaminas, principalmente a vitamina A, que desempenha um importante papel na visÃo, crescimento e manutenÃÃo dos tecido
Publicado em: 2008
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11. Aspectos FisiolÃgicos do efeito do cÃdmio em Cunninghamella elegans: mecanhismos de tolerÃncia, capacidade de sorÃÃo e acumulaÃÃo de polifosfato
A contaminaÃÃo ambiental por metais pesados à uma questÃo sÃria e mundial. O aumento das atividades industriais e a deterioraÃÃo de alguns ecossistemas, devido acumulaÃÃo de metais tÃm intensificado a poluiÃÃo ambiental. O cÃdmio, metal pesado muito utilizado em processos industriais, à um dos elementos quÃmicos mais tÃxicos, o que o torna um
Publicado em: 2007
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12. Estudo fÃsico-quÃmico do polifosfato de sÃdio visando sua aplicaÃÃo em formulaÃÃes para nutriÃÃo parenteral
A formaÃÃo de precipitados entre Ãons cÃlcio (Ca2+) e fosfato (PO4 3-) à um dos maiores problemas enfrentados na preparaÃÃo de formulaÃÃes para nutriÃÃo parenteral (NP). A administraÃÃo de NP contendo partÃculas com tamanho superior a 5 mm pode causar a morte dos pacientes por embolia. O problema à ainda mais grave na manipulaÃÃo de NP para
Publicado em: 2007