Dextrans cyclic

A homologous series of water-soluble alkyl-dextrans varying in the length of their hydrocarbon side-chain (63) have been synthesized by reaction of the appropriate alkylamine with dextran cyclic imidocarbonate. The derivatives were used in an affinity electrophoretic study of the interaction between phosphorylase and hydrophobic groups. As the length of the hydrocarbon... 

Dextran cyclic imidocarbonate has been used to prepare soluble conjugates of a-amylase from Bacillus amyloliquefaciens and of bovine liver catalase for use in experimental enzyme therapy. The results suggest that by coupling the enzymes with a poorly antigenic macromolecule (dextran) anaphylactic reaction in animals pre-immunized with dextran may be suppressed or eliminated. Trypsin has been immobilized by reaction with dextran cyclic imidocarbonate. 

Reaction with epichlorohydrin-activated agarose Reaction with dextran cyclic imidocarbonate... 

Reaction with dextran cyclic imido-carbonate reaction with glass reaction with 4-aminobenzylcellulose Adsorption onto tannin coupled to aminohexyl-cellulose Glutaraldehyde-mediated reaction with a silanized ferrite support Adsorption onto stretched nylon fibre Reaction with agarose cyclic imido-carbonate... 

Dextran cyclic imidocarbonate has been coupled to a-amylase and catalase - to give water-soluble, active, immobilized derivatives of the enzymes. 

Reaction with dextran cyclic imidocarbonate Water-soluble, active immobilized 236 ... 

Dextran cyclic imidocarbonate derivatives have been prepared and used to immobilize phloretin, fetuin, and co-enzyme A. The co-enzyme was immobilized both by reaction with dextran cyclic imidocarbonate, and also via carbodi-imide-mediated coupling to 6-aminohexanoyl-dextran. y-Irradiation of dextran in the presence of trypsin, pepsin, or ribonuclease leads to production of active immobilized forms of these enzymes. ... 

Reaction with dextran cyclic imidocarbonate Reaction with agarose cyclic imidocarbonate Reaction with agarose cyclic imidocarbonate Reaction with agarose cyclic imidocarbonate... 

Modificatimi of Enzymes and Uses of Modified En rmes a-Amylase.—Bacillus amyloliquefaciens a-amylase has been modified by covalent coupling with soluble dextran cyclic imidocarbonate and the stability of the resulting complex investigated. ... 

Dextran cyclic imidocarbonate reacted with nicotinamide adenine dinucleotide+-A -[iV-(6-aminohexyl)acetamide] to yield a water-soluble immobilized derivative of the coenzyme. ... 

Nicotinamide adenine dinucleotide+-A -[A-(6-aminohexyl)acetamide] has been coupled to dextran cyclic imidocarbonate with a view to incorporating the immobilized coenzyme, as a cofactor, into a multi-enzyme electrode and model enzyme reactors. ... 

Carboxymethyl Dextran Medium Induced Medium Rigid Cyclic Side Chain Strong... 

Oguma, T., Tobe, K., and Kobayashi, M. 1994. Purification and properties of a novel enzyme from Bacillus spp. T-3040, which catalyzes the conversion of dextran to cyclic isomaltooligosaccharides. FEBS Lett., 345,135-138. 

Dextran bound adenosine, inosine and nebularine derivatives are synthesized by coupling of their 2, 3 -0-(4-carboxyethyl-l-methylbutylidene) cyclic acetals with 6-aminohexyl- or... 

Hydroxyl Polysaccharides (cellulose, agarose, dextran, chitin, chitosan), inorganic glass, polyvinyl alcohol, polyhydroxyethyl methacrylate Cyanogen bromide, triazine method, cyclic frans-2,3-carbonate reaction, carbonylation, periodate oxidation, epoxide activation [168-181]... 

T>-threo-ty e of structure in their cyclic forms (Fig. 1). The 6-membered ring structure of a sugar also seemed important for a potent antagonist, although the oin the ring is probably not essential for combination with the dextran receptor. The inhibitory activity of a disaccharide depends on the activities of its constituent monosaccharide units, but the type of linkage between the units is less important. Since the permeability response to intradermal histamine,... 

Blue Dextran 2000 (Cibachron Blue F3GA-dextran), immobilized on agarose cyclic imidocarbonate, has been used in studies of the molecular interactions of interferons and in the purification of isoleucyl transfer-RNA synthase. ... 

There are various modified forms of dextran available (Fig. 2.5). Nichifor et al. have widely reported about the fabrication of amphiphilic cationic dextrans, formerly crosslinked wifli epichlorohydrin or not, by replacing them with groups alike to the mentioned ones however in which one of the quaternary ammonium substituent s was an alkyl chain between C2 and C16 instead of methyl [24]. In this circumstance the reagent active for cationization was a 2,3-epoxypropyl alkyl dimethyl ammonium chloride derived from epichlorohydrin and a dimethyl alkylamine [24]. Products with a DS between 0.18 and 0.94 were derived The kinetic of the reaction of polysaccharides, with epichlorohydrin and various tertiary amines was investigated [24], by quantification of reagents and products in the reaction mixture with or without the presence the polysaccharide, at regular intervals. They reported fliat the use of cyclic amines e.g. 1-methyl-imidazol or 1,4-diazabicyclo [24] octan as catalysts together with another tertiary amine, used for the substitution, was not... 

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