Isomaltose
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Determinação das conformações mais estáveis da isomaltose α-Dglicopiranosil-( 1→6)-D-glicose. / Determination of the most stable conformations of isomaltose α-Dglucopyranosyl-( 1→6)-D-glucose.
Sabendo-se que a conformação das moléculas de dissacarídeos é definida pela energia de rotação da ligação glicosídica definida pelos ângulos diedros Ø (phi) e Ψ (psi) (e Ώ(ômega), quando este existir), o nosso trabalho consistiu na definição de um conjunto de valores de ângulos que permitem à molécula da isomaltose alcançar confo
Publicado em: 2007
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2. Produção, purificação, caracterização e viabilidade de aplicação da dextranase de penicillium SP
Oitocentas e sessenta e três linhagens de fungos foram isoladas do solo de plantações de cana de açúcar, assim como de varas de cana deterioradas, e testadas quanto ã atividade dedextranase. Nesta seleção, foi encontrada uma linhagem de Penicillium sp que produz alta atividade de dextranase quando cultivada em meio líquido contendo dextrana como ún
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/01/1987
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3. Oxidation of Isomaltose by Pseudomonas taetrolens
Pseudomonas taetrolens NRRL B14 oxidized isomaltose without hydrolysis of the 1–6 glycosidic linkage. The resulting isomaltobionic acid was identified by chromatographic studies of acid hydrolysates and reconversion to isomaltose.
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4. A CHEMICAL SYNTHESIS OF ISOMALTOSE*
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5. HUMAN INTESTINAL DISACCHARIDASES AND HEREDITARY DISACCHARIDE INTOLERANCE. THE HYDROLYSIS OF SUCROSE, ISOMALTOSE, PALATINOSE (ISOMALTULOSE), AND A 1,6-α-OLIGOSACCHARIDE (ISOMALTO-OLIGOSACCHARIDE) PREPARATION*
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6. Novel α-Glucosidase from Aspergillus nidulans with Strong Transglycosylation Activity
Aspergillus nidulans possessed an α-glucosidase with strong transglycosylation activity. The enzyme, designated α-glucosidase B (AgdB), was purified and characterized. AgdB was a heterodimeric protein comprising 74- and 55-kDa subunits and catalyzed hydrolysis of maltose along with formation of isomaltose and panose. Approximately 50% of maltose was conver
American Society for Microbiology.
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7. Crypticity of Myrothecium verrucaria Spores to Maltose and Induction of Transport by Maltulose, a Common Maltose Contaminant
Spores of the fungus Myrothecium verrucaria are cryptic to maltose and isomaltose. Induction of a transport system can be effected by several sugars whose order of effectiveness is: turanose > maltulose > sucrose > d-arabinose, d-fructose, nigerose, maltotriulose, kestose > melezitose, raffinose, nystose, and stachyose. The transport system is not specific t
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8. Effect of dextranase on the extracellular polysaccharide synthesis of Streptococcus mutans; chemical and scanning electron microscopy studies.
A dextranase preparation (AD17) partially purified from a culture liquor of Spicaria violacea strain IFO 6120 significantly inhibited the formation of artifcial dental plaque on a steel wire or on an extracted tooth surface. Changes in the surface morphology of Streptococcus mutans cells due to AD17 action were studied using scanning electron microscopy. S.
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9. Modified Substrates and Modified Products as Inducers of Carbohydrases
Cellobiose and isomaltose are both inducers and repressors of cellulase and dextranase, respectively. The repression can be avoided by supplying the disaccharide slowly. This has been done by use of palmitate and acetate esters which are hydrolyzed by esterases of the growing organism to yield the inducer. Sucrase yields, also, are greatly increased (to 80 t
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10. Extracellular Maltase of Bacillus brevis†
Bacillus brevis NRRL B-4389 produced extracellular maltase (α-glucosidase; EC 3.2.1.20) only in the presence of short α-1,4-glucosidic polymers, such as maltose and maltotriose. An optimum medium was developed; it contained 2.5% maltose, 0.5% nonfat dry milk, 0.4% yeast extract, and 0.01% CaCl2. The enzyme was produced extracellularly during the logarithmi
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11. Polysaccharide Produced by the Genus Pullularia: II. Trans-α-Glucosidation by Acetone Cells of Pullularia
Acetone cells of Pullularia sp. were incubated with maltose, and the saccharides produced were fractionated on a charcoal column. The fractions were subjected to paper-chromatographic analysis and enzymatic assay. By these methods, the saccharides have been shown to include glucose, maltose, maltotriose, panose, and the lower members of glucose polymers cont
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12. Purification and some properties of an extracellular maltase from Bacillus subtilis.
Bacillus subtilis P-11, capable of producing extracellular maltase, was isolated from soil. Maximum enzyme production was obtained on a medium containing 2.0% methyl-alpha-D-glucose, 0.5% phytone, and 0.2% yeast extract. After the removal of cells, extracellular maltase was precipitated by ammonium sulfate (85% saturation). The enzyme was purified by using t