Micelle Reaction
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Novos surfactantes alquil poliglicosídicos à base de amilose extraída da batata inglesa (Solanum tuberosum L.)
Alkyl polyglycosides (APGs) are new biodegradable surfactants, non-toxic, synthesized from abundant renewable sources, potentially more appropriate than anionic surfactants. A range of glycosides denoted APG-Cy was synthesized by the Köenig-Knorr reaction using C10, C16 and C18 alcohols and derived from the degradation of amylose from English potato. The mo
Quím. Nova. Publicado em: 2017-04
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2. Estudo das condições de hidrólise de álcoois primários sulfatados. / A study on the susceptibility to acid-catalysed hydrolysis of primary alcohol ether sulfates in concentrated aqueous mixtures.
Álcoois primários sulfatados de cadeia longa, usualmente na forma de sais de sódio, são tensoativos de grande interesse comercial utilizados em diversas formulações de higiene pessoal e limpeza doméstica. Eles são produzidos comercialmente através da reação de álcoois etoxilados com trióxido de enxofre seguida de imediata neutralização com hid
Publicado em: 2011
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3. Chemiluminescent oxidation of luminol in micellar media: development of an anti-radical capacity assay / Oxidação quimiluminescente do luminol em meios micelares: desenvolvimento de uma ensaio para determinação da capacidade anti-radicalar
In this work, a methodology to evaluate the anti-radical capacity of hydrophilic and lipophilic compounds based on luminol chemiluminescence in micellar media was developed. The reaction of luminol, hemin and hydrogen peroxide was studied in the presence of charged surfactants (CTAB/CTAC and SDS). The concentration of each reagent was independently varied in
Publicado em: 2008
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4. Síntese de Surfactantes Derivados da D-ribonolactona
Surfactants are amphiphilic compounds widely used in cosmetics, food and paint industries. The need for products obtained from natural raw materials instead of petroleum derivatives has led searchers, to the development “natural surfactants” derivated from carbohydrates, biodegradable and atoxic. In this work, we describe the preparation of amphi
Publicado em: 2007
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5. SÃntese e caracterizaÃÃo de surfactantes glicosÃdicos a partir da amilose e alquil fenÃis extraÃdos do LCC. / Synthesis and characterization of glycosidic surfactantes from amylose and alkyl extracted phenols of the LCC.
Nonionic surfactants are synthesised from renewable raw materials such as fat acids and sugars. They are dermatological safe, biodegradable and provide excellent surface active properties, such as good wettability, good foaming production and good cleaning ability. The present work deals with the synthesis and characterization of alkyl polyglycosides where t
Publicado em: 2007
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6. Iron oxide based nanoparticles: synthesis and characterization / Síntese e caracterização de nanopartículas baseadas em óxidos de ferro
Magnetic nanoparticles have importance in several areas of knowledge including physics, chemistry and biology. Obtaining nanomaterials with well defined characteristic and shapes is a great challenge for this area of research. In this work two synthetic processes for the synthesis of the magnetic nanoparticles were developed, in reversed micelles and sol-gel
Publicado em: 2005
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7. Ambientes micelares em química analítica
This review deals with the general use of the surfactants in Analytical Chemistry. Principal characteristic of the micelle is the improvement in selectivity and/or sensitivity of the analytical determination with emphasis on the catalytic reaction and "cloud point" extraction.
Química Nova. Publicado em: 2001-02
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8. The interaction of quinone and detergent with reaction centers of purple bacteria. I. Slow quinone exchange between reaction center micelles and pure detergent micelles.
The kinetics of light-induced electron transfer in reaction centers (RCs) from the purple photosynthetic bacterium Rhodobacter sphaeroides were studied in the presence of the detergent lauryldimethylamine-N-oxide (LDAO). After the light-induced electron transfer from the primary donor (P) to the acceptor quinone complex, the dark re-reduction of P+ reflects
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9. FM1-43 dye ultrastructural localization in and release from frog motor nerve terminals.
Previous work has shown that the fluorescent styryl dye FM1-43 stains nerve terminals in an activity-dependent fashion. This dye appears to label the membranes of recycled synaptic vesicles by being trapped during endocytosis. Stained terminals can subsequently be destained by repeating nerve stimulation in the absence of dye; the destaining evidently reflec
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10. Interaction of octyl-beta-thioglucopyranoside with lipid membranes.
Octyl-beta-thioglucopyranoside (octyl thioglucoside, OTG) is a nonionic surfactant used for the purification, reconstitution, and crystallization of membrane proteins. The thermodynamic properties of the OTG-membrane partition equilibrium are not known and have been investigated here with high-sensitivity titration calorimetry. The critical concentration for