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	Provedor de dados BABT (2) Ciênc. Tecnol. Aliment. (1) BJM (1) Autor Datta,Sudeshna (1) Gaddad,S.M. (1) Kawaguti,Haroldo Yukio (1) Mrudula,Soma (1) Pal,Arundhati (1) Paul,Amal K. (1) Sanjay,M.K. (1) Sato,Hélia Harumi (1) Shivannavar,C.T. (1) Shyam,Nidhi (1) Usha,M.S. (1) Mais... Palavra-chave Immobilized cells (4) Alcaligenes latus (1) Bacillus sphaericus (1) Biodegradation (1) Calcium alginate (1) Cell leakage (1) Cr(VI) reduction: Bioremediation (1) Detergent (1) Erwinia sp. (1) H-acid (1) Isomaltulose (1) Optimization (1) Oxidant stability (1) PVA alginate (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2013 (1) 2012 (1) 2011 (1) 2010 (1) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Hexavalent chromium reduction by immobilized cells of Bacillus sphaericus AND 303 BABT Pal,Arundhati; Datta,Sudeshna; Paul,Amal K.. Bacillus sphaericus AND 303, a Cr(VI)-resistant and reducing bacterium reported from serpentine outcrops of Andaman was evaluated for Cr(VI) reduction using immobilized cells under batch culture. Screening of inert matrices for entrapment of whole cells indicated that polyvinyl alchohol-alginate was the most effective one reducing 87.5% of 20 µM Cr(VI) in 24 h. The rate of chromate reduction was dependent on initial Cr(VI) and biomass concentrations. The PVA cell beads were recycled three times without cell leakage and disintegration. The reduction efficiency was improved in the presence of glucose and glycerol as electron donors leading to complete reduction. However, the presence of additional metal ions was inhibitory to Cr(VI) reduction. It could be... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacillus sphaericus; Immobilized cells; PVA alginate; Cr(VI) reduction: Bioremediation. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000300019 Immobilization of Bacillus megaterium MTCC 2444 by Ca-alginate entrapment method for enhanced alkaline protease production BABT Mrudula,Soma; Shyam,Nidhi. Optimization of culture conditions and immobilization parameters for alkaline protease production was carried out by employing Bacillus megaterium MTCC2444. The partially purified enzyme was tested for its stability in the presence of oxidants, surfactants and commercial detergents. The optimum temperature, pH, incubation time and inoculum size were 55 ºC, 11, 48 h, 1 %, respectively. Calcium alginate was used as the immobilization matrix and the effects of gel concentration, bead size, age of immobilized cells, solidification period and initial biomass concentration on alkaline protease production and cell leakage were investigated. The results indicated that the immobilization was most effective with 4 % gel concentration, bead size of 3 mm, 24 h aged... Tipo: Info:eu-repo/semantics/article Palavras-chave: Optimization; Immobilized cells; Cell leakage; Detergent; Oxidant stability. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000100017 Degradation of h-acid by free and immobilized cells of Alcaligenes latus BJM Usha,M.S.; Sanjay,M.K.; Gaddad,S.M.; Shivannavar,C.T.. Alcaligenes latus, isolated from industrial effluent, was able to grow in mineral salts medium with 50 ppm (0.15 mM) of H-acid as a sole source of carbon. Immobilization of Alcaligenes latus in Ca-alginate and polyurethane foam resulted in cells embedded in the matrices. When free cells and immobilized cells were used for biodegradation studies at concentration ranging from 100 ppm (0.3 mM) to 500 ppm (1.15 mM) degradation rate was enhanced with immobilized cells. Cells immobilized in polyurethane foam showed 100% degradation up to 350 ppm (1.05 mM) and 57% degradation at 500 ppm (1.5 mM). Degradation rate of Ca-alginate immobilized cells was less as compared to that of polyurethane foam immobilized cells. With Ca-alginate immobilized cells 100%... Tipo: Info:eu-repo/semantics/article Palavras-chave: H-acid; Biodegradation; Immobilized cells; Alcaligenes latus. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400012 Production of isomaltulose obtained by Erwinia sp. cells submitted to different treatments and immobilized in calcium alginate Ciênc. Tecnol. Aliment. Kawaguti,Haroldo Yukio; Sato,Hélia Harumi. In recent decades, there has been an increase in the studies of isomaltulose obtainment, due to its physicochemical properties and physiological health benefits. These properties, which include low cariogenicity, low glycemic index and greater stability, allow the use of this sweetener as a substitute for sucrose in foods; besides the fact that it can be converted to isomalt, a dietary non-cariogenic sugar alcohol used in pharmaceuticals as well as in the food industry. Isomaltulose (6-O-α-D-glucopyronosyl-1-6-D-fructofuranose) is a disaccharide reducer obtained by the enzymatic conversion of sucrose - the α-glucosyltransferase enzyme. Different treatments were performed for the preparation of whole cells; lysed cells; and crude enzyme extract of Erwinia... Tipo: Info:eu-repo/semantics/article Palavras-chave: Calcium alginate; Immobilized cells; Erwinia sp.; Isomaltulose. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000100039 Registros recuperados: 4 Primeira ... 1 ... Última

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