Hayashibara Biochemical Laboratories, Inc.

Makoto Shiosaka

Koso Kato

A cyclodextrin glycosyltransferase having high heat stability is obtained from the cell-free broth of a culture of Bacillus stearothermophilus. The cyclodextrin glycosyltransferase gives higher yields of cyclodextrin from starch and higher transfer ratios of glucose in starch or partial starch hydrolyzate to sucrose than known cyclodextrin glycosyltransferases.

Heat stable cyclodextrin glycosyltransferase

Hydrogenated pullulan is produced by the reaction of an aqueous solution of pullulan with hydrogen gas under pressure in the presence of suitable catalysts until the reducing property of the solution disappears. The hydrogenated pullulan is much more resistant to heat than pullulan and its aqueous solution hardly loses viscosity and is not colored under heat treatment. The hydrogenated pullulan is much less absorbable by the intestinal walls than pullulan so as to reduce more effectively the caloric value of foods when it is mixed with foods. Shaped bodies such as films, sheets, plates, capsules, containers, coatings and fibers are readily prepared in a conventional manner. The films are practically impervious to atmospheric oxygen and suitable as packaging material.

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Okayama, Japan

Makoto Shiosaka