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Journals and Conferences
Biodiesel fuel is favored as a type of carbon neutral energy. To popularize its usage, by-product waste glycerol utilization is a critical problem. We tried to isolate waste glycerol utilizing bacteria, and obtained the alkalo- and halophile bacteria Halomonas sp. KM-1. This strain produced bioplastic poly(3-hydroxybutyrate) (PHB) in a simple medium and… (More)
The selective and efficient production of N-acetyl-D-glucosamine (GlcNAc) was achieved from flake type of alpha-chitin by using crude enzymes derived from Aeromonas hydrophila H-2330.
Finely powdered alpha- and beta-chitin can be completely hydrolyzed with chitinase (EC 22.214.171.124) and beta-N-acetylhexosaminidase (EC 126.96.36.199) for the production of 2-acetamido-2-deoxy-D-glucose (GlcNAc). Crude chitinase from Burkholderia cepacia TU09 and Bacillus licheniformis SK-1 were used to digest alpha- and beta-chitin powder. Chitinase from B.… (More)
Chitosan of 24% degree of acetylation was depolymerized by a mixture of cellulase, alpha amylase, and proteinase to give the title oligosaccharides. The removal of products by membrane separation permitted yield maximization of products having degree of polymerization in the 3-10 range.
Recent studies of the chemical modification of chitin and chitosan are discussed from the viewpoint of biomedical applications. Special emphasis is placed on the role of individual functional groups in applications of modified chitosan. The modifications discussed here include chitosan attached to sugars, dendrimers, cyclodextrins, crown ethers, and glass… (More)
Commercial non-chitinase enzymes from Aspergilus niger, Acremonium cellulolyticus and Trichoderma viride were investigated for potential utilization in the preparation of 2-acetamido-2-deoxy-D-glucose (N-acetyl-D-glucosamine, GlcNAc) from chitin. Among the tested enzymes, cellulase A. cellulolyticus exhibited highest chitinolytic activity per weight toward… (More)
Chitosan-dendrimer hybrids having various functional groups such as carboxyl, ester, and poly(ethylene glycol) groups were prepared successfully using dendrimer acetal by reductive N-alkylation. The synthetic procedure could be accomplished by one-step reaction without organic solvent. The degree of substitution of dendrimer was 0.13-0.18 evaluated by (1)H… (More)