Levan
Mostrando 1-12 de 75 artigos, teses e dissertações.
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1. Chemical constituents, antioxidant, antimicrobial and anti-lipase activities of composites derived from green tea, lemon peels and red wine lees
Resumo Novas fontes de nutracêuticos, compósitos derivados de extrato de chá verde, borras de vinhos tintos e extratos de cascas de limão foram produzidas. O primeiro compósito foi produzido a partir de extrato de chá verde e borras de vinhos tintos. O segundo compósito foi produzido de extrato de chá verde, borras de vinhos tintos e cascas de limão
Braz. J. Food Technol.. Publicado em: 29/07/2019
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2. Potencial de retenção de antioxidante e manutenção de qualidade de framboesas e morangos tratados com cloreto de cálcio e estocados sob refrigeração
Resumo Frutos de framboesa e de morango foram armazenados a 0 °C e umidade relativa (UR) de 95% durante oito dias. Os frutos foram tratados com cloreto de cálcio e seus parâmetros de qualidade e perdas de peso monitorados e comparados com os valores dos frutos não tratados. Uma perda de peso maior foi observada para as framboesas não tratadas (16%) que
Braz. J. Food Technol.. Publicado em: 22/05/2017
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3. Zymomonas mobilis IMMOBILIZED ON LOOFA SPONGE AND SUGARCANE BAGASSE FOR LEVAN AND ETHANOL PRODUCTION USING REPEATED BATCH FERMENTATION
Abstract Two experiments were carried out using loofa sponge and sugarcane bagasse as immobilization support. First a 2(5-2) design of experiments was realized with the following independent variables: sucrose concentration; pH; incubation time and agitation. Based on the best results observed in this experiment, the capacity for reuse of the supports in sub
Braz. J. Chem. Eng.. Publicado em: 2017-04
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4. Monitoramento temporal e espacial de contaminações bacterianas na produção de bioetanol: caracterização molecular por T-RFLP e detecção quantitativa por qPCRde comunidades formadoras de biofilmes / Temporal and spatial monitoring of bacterial contamination in bioethanol production: a molecular characterization by T-RFLP and quantitative detection by qPCR of community-formers biofilms
Bacterial contamination by Lactobacillus, Bacillus and Leuconostoc and other lactic acid bacteria is one of the main factors that affects the yield in alcoholic fermentation process. Biofilm formation protects the bacteria community and it is a permanent source of contamination. For characterization of these contaminations in (1) biofilms from centrifuge, ta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/2012
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5. Levan from Bacillus subtilis Natto: its effects in normal and in streptozotocin-diabetic rats
Levan is an exopolysaccharide of fructose primarily linked by β-(2→6) glycosidic bonds with some β-(2→1) branched chains. Due to its chemical properties, levan has possible applications in both the food and pharmaceutical industries. Bacillus subtilis is a promising industrial levan producer, as it ferments sucrose and has a high levan-formation capaci
Braz. J. Microbiol.. Publicado em: 2012-12
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6. Nutritional requirements of Zymomonas mobilis CCT 4494 for levan production
The aim of this work was to study the nutritional requirements of Zymomonas mobilis CCT 4494 for levan production in three chemically defined media. During the optimization of the fermentative process for the production of the exopolysaccharide, different concentrations of glucose, fructose and sucrose as carbon source and yeast extract as vitamin source wer
Brazilian Archives of Biology and Technology. Publicado em: 2011-06
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7. Estudo da produção de frutose a partir de levana obtida da sacarose / Study of frutose production from levana obtained from sucrose
O mercado consumidor da frutose tem aumentado significativamente nos últimos anos pela sua utilização cada vez maior em substituição à sacarose em virtude do seu poder edulcorante 70% superior e dos benefícios fisiológicos importantes, como metabolismo independente da insulina, sendo adequada para alimentos fabricados especificamente para diabéticos
Publicado em: 2010
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8. SÃntese e caracterizaÃÃo de partÃculas de levana-magnetita e sua utilizaÃÃo como matriz para imobilizaÃÃo de tripsina
O polissacarÃdeo levana foi utilizado como revestimento de partÃculas de magnetita, as quais foram obtidas pelo mÃtodo de co-precipitaÃÃo de uma soluÃÃo contendo Ãons de Fe(II) e Fe(III) em meio aquoso alcalino. As partÃculas de levana-magnetita foram caracterizadas por microscopia eletrÃnica de varredura (MEV), magnetometria, difraÃÃo de Raios-X
Publicado em: 2008
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9. Adsorption of light alkanes on coconut nanoporous activated carbon
This paper presents experimental results for adsorption equilibrium of methane, ethane, and butane on nanoporous activated carbon obtained from coconut shells. The adsorption data were obtained gravimetrically at temperatures between 260 and 300K and pressures up to 1 bar. The Toth isotherm was used to correlate the data, showing good agreement with measured
Brazilian Journal of Chemical Engineering. Publicado em: 2006-12
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10. Desenvolvimento de formas lipossomais contendo levana
The present study proposes the manufacture of liposomes containing levan as an antitumor and immunomodulator for the cancer therapy. Levan-loaded liposomes (Lev-LIPO) were prepared according to the thin film formed method. Physicochemical characterization was performed immediately after their preparation. Additionally, both accelerated and long-term stabilit
Publicado em: 2006
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11. HidrÃlise Ãcida da levana em forno de microondas
The levan used was produced by Zymomonas mobilis, strain ZAG 12, in sucrose way was acid hydrolysis in microwaves oven, which was used as a hot source, insât of the traditional bath-maria. In the hydrolysis was used a levan solution 20g/L with 0,1M cloridric acid. The different molecular weights bands had been separate by the precipitation method. The levan
Publicado em: 2004
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12. Production of biopolímeros for microrganismo modified geneticamente. / Produção de biopolimeros por microrganismos modificados geneticamente.
This work aimed to study the production of biopolymers by genetically modified microorganisms. Xanthomonas campestris pv campestris and Xanthomonas axonopodis pv manihotis were studied as a receiver lineage of the genes under study, and Zymomonas mobilis and Xylella fastidiosa as donor lineages. The first chapter is a revision article about the production of
Publicado em: 2003