Kansai Paint Company, Ltd.

Ojo Kako Co., Ltd.

Mikiko Hata

Hiroshi Itoh

Takeshi Kobayashi

Masahiro Sakamoto

Shinji Iijima

Takamitsu Iida

Naoki Isobe

Masamichi Kamihira

A biocatalyst is immobilized with a graft product of a polymer and saponified polyvinyl acetate containing a stilbazolium group as a photo-crosslinking group. The polymer is preferably gelatin, collagen, starch, cellulose, gum arabic, tragacanth gum, carrageenan, mannan, dextrin or alginic acid. The graft product is prepared by bonding the polymer to the polyvinyl acetate, either directly through functional groups of the polymer and polyvinyl acetate or through a crosslinking agent. The polymer provides affinity for the biocatalyst and by grafting the polymer to the saponified polyvinyl acetate, damage to cells upon immobilization is reduced. A liquid composition containing a biocatalyst and the graft product is added to an aqueous solution of an inorganic salt or an organic salt to form a granular gel and the gel is irradiated with actinic rays to cure the gel.

Method for immobilizing biocatalyst in granular form with a

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Nagoya, Japan

Mikiko Hata