Sugar Esters
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Chemical and volatile composition of jujube wines fermented by Saccharomyces cerevisiae with and without pulp contact and protease treatment
Abstract This study evaluated the chemical and volatile composition of jujube wines fermented with Saccharomyces cerevisiae A1.25 with and without pulp contact and protease treatment during fermentation. Yeast cell population, total reducing sugar and methanol contents had significant differences between nonextracted and extracted wine. The nonextracted wine
Food Sci. Technol. Publicado em: 01/04/2016
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2. Composição química dos grãos e da cera foliar de variedade Glycine max (L.) Merrill cv. MG/ BR-46 Conquista cultivada sob atmosfera enriquecida de gás carbônico e temperatura elevada
The concentration of carbon dioxide (CO2) has increased in the last decades, due mainly to the combustion of fossil fuels. A gradual increase of the global temperature is expected as a consequence. Soybean is an important crop in most countries, being consumed either as human or domestic animals food. The present work is composed of two chapters, the first d
Publicado em: 07/02/2014
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3. Composição química de aguardentes de cana-de-açúcar fermentadas por diferentes cepas de levedura Saccharomyces cerevisiae
The aim of this study was to evaluate the chemical composition of sugar cane spirits, fermented by different commercial Saccharomyces cerevisiae yeast strains and double distilled by pot still. Sugar cane juices were separately fermented by yeasts CA-11, Y-904, BG-1, PE-2, SA-1 and CAT-1 and distilled by pot still according to the methodology used for whisky
Quím. Nova. Publicado em: 2012
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4. Processo simplificado para a produção de concentrado de acidos graxos de cadeia longa (D-003) a partir da cera de cana-de-açucar (Saccharum officinarum L.) / Simplified process to production of concentrated long chain fatty acids from sugar cane wax (Saccharum officinarum L.)
The sugar cane (Saccharum officinarum L.) wax obtained from filter cake, a byproduct of the sugar and alcohol industries, has attracted great interest due to the large potential for application in various industrial sectors, including the pharmaceutical industry. Brazil is the largest sugar cane producer and sugar exporting country in the world, making it a
Publicado em: 2010
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5. Bioacetilação de álcoois catalisada por Saccharum officinarum
Lipase-catalysed esterifications of alcohols using immobilized enzyme system from sugar cane (Saccharum officinarum) as biocatalyst afforded the corresponding esters in considerable yields (68-93%). Under optimized conditions, the material was utilized for reactions of acetylation with several advantage. It also investigated the possibility of reuse of immob
Química Nova. Publicado em: 2009
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6. DeterminaÃÃo dos teores do de carbamato de etila e de acroleÃna em aguardentes de cana produzidas em Minas Gerais / Determination of ethyl carbamate, acrolein in sugar cane spirits produced in Minas Gerais
Sugar cane spirit is obtained by means of natural fermentation process of the sugar cane juice, there being some critical points in the steps due to the presence of contaminant microorganisms and undesirable substances that can interfere in the production and the quality of the beverage. In addition to ethanol and water, the beverage contains in lesser conce
Publicado em: 2009
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7. Efeito de substâncias empregadas para remoção de cobre sobre o teor de compostos secundários da cachaça
High copper content is of great concern among producers of sugar-cane spirits who frequently use filters instead of cleaning the stills. This study compared the efficiency of activated carbon, ion-exchange-polymeric resin, and activated-carbon/iron-oxide magnetic composite for copper reduction without removing excessive organic compounds that are important f
Química Nova. Publicado em: 2009
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8. Estudos da atividade antiespumante de ésteres etílicos derivados de óleos vegetais / Estudo da atividade antiespumante de ésteres etílicos derivados de óleos vegetais
Gas-liquid foams are colloidal systems formed by air bubbles separated by a liquid thin film stabilized by surfactants, which are often found in many industrial processes. It becomes often necessary the use of antifoams to avoid loses of material or loses in the processs efficiency caused by a large foam production. The foaming mixtures utilized in this work
Publicado em: 2008
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9. Study of the reaction of acid ester production of greasy for it saw enzymatic objectifying nourishing applications / Estudo da reaÃÃo de produÃÃo de Ãsteres de Ãcidos graxos por via enzimÃtica objetivando aplicaÃÃes alimentÃcias
Several experiments were done aiming at the study on the enzymatic esterification of the oleic acid with fructose in ethanolic medium, focusing the synthesis of biodegradable biosurfactants. For that purpose, it was utilized the enzyme, Candida antartica B., at temperature of 55 ÂC, in reacting time of 48, 72, 96 e 120 hours. Accordingly to the obtained res
Publicado em: 2008
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10. Use of a biofuel obtained from the fast pyrolysis of sugarcane trash in an Otto engine / Uso de biocombustivel da pirolise rapida da palha de cana em um motor de ciclo Otto
In September 2002 the state of São Paulo promulgated the Law Nº 11241 by which was codified the gradual elimination of fire as a method to remove trash from the sugar-cane fields before harvestig. Large amounts of sugar-cane trash with an important energy potential will be available as a result of this law. New technologies to harvest and process this biom
Publicado em: 2007
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11. Estudo químico e avaliação do potencial farmacológico e herbicida de Maytenus imbricata Mart. ex. Reissek
In this work, it was studied leaves, branches and seeds of Maytenus imbricata, whose chemical constitution and activities pharmacological until this moment had not been reported in literature. From Maytenus imbricata leaves and branches hexane extracts were isolated and identified 3-oxo-lup-20(29)-en-30-al, 30-hydroxy-lup-20(29)-en-3-one, 11 -hydroxy-lup-20(
Publicado em: 2007
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12. Síntese enzimática de ésteres de açúcar: surfactantes e polímeros como novos materiais ambientalmente seguros
Ésteres de açúcar são compostos que possuem ação surfactante, antifúngica e bactericida e podem ser obtidos a partir de duas fontes renováveis de matéria-prima: açúcares e óleos vegetais. Sua capacidade de se biodegradar, aliada ao fato de serem atóxicos, insípidos, inodoros, biocompatíveis, não-iônicos, digestíveis e resistirem a condiçõ
Publicado em: 2007