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Papers by Jun-ichi Azuma

京都大学農学部演習林報告 = BULLETIN OF THE KYOTO UNIVERSITY FORESTS, Dec 20, 1990

京都大学農学部演習林報告 = BULLETIN OF THE KYOTO UNIVERSITY FORESTS, Dec 20, 1991

京都大学農学部演習林報告 = BULLETIN OF THE KYOTO UNIVERSITY FORESTS, Dec 2, 1988

Trends in Glycoscience and Glycotechnology, 1992

A simple method for preparation of homologous series of laminari-oligosaccharides was presented. ... more A simple method for preparation of homologous series of laminari-oligosaccharides was presented. Curdlan, a kind of (1→ 3 )-s-D-glucan, was subjected to direct acetolysis. followed by saponification to give a mixtur巴 oflaminari-oligosaccarides. Acetolysis for 1 hr at 600C was found to be an optimum for the preparation of a mixture of laminari-oligosaccharides having degree of polymerization 2 to 7. Each oligosaccharide was separated by a size exclusion chromatography on Toyopearl HW 40 S and its properties were characterized.

Trends in Glycoscience and Glycotechnology, 2003

Journal of Applied Glycoscience, 2009

To examine the applicability of microwave irradiation for the extraction of polysaccharides in th... more To examine the applicability of microwave irradiation for the extraction of polysaccharides in the fruiting body of Hericium erinaceum, structures of polysaccharides obtained by microwave irradiation in water were compared to those obtained by hot water extraction using conventional external heating. A major polysaccharide obtained by microwave irradiation in water (140 C, 5 min) was (1 3;1 6)-β-D glucan rich in (1 3) linkages, whereas polysaccharides obtained by hot water extraction using conventional external heating (100 C, 6 h) were fucogalactan and (1 3;1 6)-β-D glucan rich in (1 6) linkages. In the case of microwave irradiation in water, fucogalactan was suggested to be depolymerized during heating. Microwave heating in water has an advantage over the conventional external heating for extraction of β-glucan rich in (1 3) linkages from the fruiting body of H. erinaceum.