Daicel Chemical Industries, Ltd.

Sekisui Kagaku Kogyo Kabushiki Kaisha

Hiroshi Inagaki

Tohru Shibata

Minoru Takahashi

Hisayuki Matsuda

Sho Kikyotani

Takeaki Miyamoto

Hiraku Ito

Katsuro Shinoda

Anticoagulative high-molecular composition which comprises a cellulosic polyelectrolyte complex formed from a polycationic cellulose derivative such as a quaternary ammonium salt of hydroxyalkyl cellulose, and a polyanionic cellulose such as sodium cellulose glycolate, which is used in the field of medical instruments or devices.

Anticoagulative high-molecular compositions

A process for producing a reduced keratinous substance having a high adsorptive power for cationic substances, which comprises reducing a substance containing keratin as a main ingredient under alkaline conditions to cleave the disulfide linkages of the keratin, dissolving the reduced keratin in an aqueous medium containing urea or thiourea in a concentration of less than 5 moles/liter, and then acidifying the resulting solution to precipitate the dissolved reduced keratin under such conditions that the thiol side-chains present in the reduced keratin do not substantially undergo oxidation. The reduced keratinous substance is especially useful as a heavy metal ion capturing agent.

Process for producing reduced keratinous substances using urea or

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Nagaokakyo, Japan

Hiroshi Inagaki