Dextran Sucrase
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Seleção de linhagens produtoras de goma isoladas da cana-de-açucar
The aim of this work was to isolate and select potentia1ly gum producing strains present in sugar cane. Guns are biopolymers carne 1Tom vegetal (e.g., guar gurn, carragen gum) or microbian (e.g., xantan gum, dextran gum) source. Dextran producing bacteria are 1Tequently found in damaged sugar cane. Dextran is a biopolymer that consists of a-Dglucose monomeri
Publicado em: 2003
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2. Sintese do processo de obtenção de dextrana clinica e frutose a partir de sacarose
Dextran is a polysaccharid exclusively composed of monomeric units of glucose, joined by a-1,6 glucosidic bonds at the linear position. This polysaccharid is of a great industrial interest at the petrochemistry, food, chemistry and pharmaceutical areas. During the synthesis process of dextran occurs the frutose liberation, that is a monosaccharid of high int
Publicado em: 2001
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3. Estudo da recuperação de frutose produzida na sintese enzimatica "in vitro" de dextrana
Dextran is a biopolymer from bacteriological origin, with great industrial potential. It is mainly produced by the enzime dextran sucrose from Leuconostoc mesenteroids. It manly formed by glucose residues linked by a-1,6 bonds. This polysaccharide has many uses today, for example in many foods, pharmaceutics products, cosmetics, chemical and photographic ind
Publicado em: 1999
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4. Influence of secretory immunoglobulin A and purified secretory component on dextran-sucrase activity of Streptococcus mutans.
The net stimulation of dextransucrase EC 2.4.1.5) activity from Streptococcus mutans HS6 by dextran, secretory immunoglobulin A, or secretory component was investigated. Approximately equal stimulation resulted from treatment with these three components.
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5. Preferential Utilization of the Glucosyl Moiety of Sucrose by a Cariogenic Strain of Streptococcus mutans
The utilization of sucrose by a cariogenic strain of Streptococcus mutans was studied. The soluble and cell-bound sucrose-dependent, polymer-forming sucrase activities constitutively produced by the bacteria during growth on glucose were measured. About eight times more dextransucrase activity was present than levan-sucrase activity. During various states of
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6. The effects of sodium ricinoleate on small intestinal function and structure.
The mechanism of hydroxy fatty acid-induced secretion was investigated in perfused hamster small intestine in vivo. Sodium ricinoleate at an 8-mM concentration resulted in not only secretion of water and sodium, but an increase in intestinal clearance of inulin and a 16,000 mol wt dextran as well. A concentration of ricinoleate (2 mM) which did not affect wa
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7. Mechanism of the Adherence of Streptococcus mutans to Smooth Surfaces III. Purification and Properties of the Enzyme Complex Responsible for Adherence
Enzymes which possess the ability to cause the adherence of Streptococcus mutans cells to a smooth glass surface were purified 1,100 times by chromatography on agarose gel followed by hydroxylapatite gel. During the purification procedures, the enzymes from strain HS6 (group a) were examined for the synthesis of water-soluble and water-insoluble polysacchari