Abstract: Novel enzymes exhibiting proteolytic activity in alkaline media and stability at high temperatures and under alkaline conditions are produced by a novel Bacillus strain designated GX6638 or its mutants or variants. These enzymes are especially well-suited for inclusion in washing compositions. A culture of GX6638 has been deposited with the American Type Culture Collection, Rockville, Md. as ATCC No. 53278.

Abstract: Enzymes are immobilized on non-porous glass fibers by coating glass fibers with a solution containing an enzyme and a soluble polymer and contacting the coated fibers with a controlled amount of cross-linking agent to obtain an immobilized enzyme having high activity and long endurance, and which provides a high percentage of conversion. The enzyme may be an amylase, the polymer a plyalkyleneimine and the cross-linking agent glutaraldehyde. Continuous immobilization can be carried out by moving continuous fibers to applicator stations for applying a solution of enzyme and polymer and a solution of cross-linking agent.

Abstract: Drainage pipes, such as toilet drains, which are clogged with cellulosic paper products, are unclogged by contacting the paper with a cellulase enzyme in the form of an aqueous solution, a viscous fluid comprising the enzyme dispersed in a non-cellulosic water-soluble natural or synthetic gum, or solid particles comprising the enzyme dispersed in a water-soluble polymer.

Abstract: Biological materials are immobilized by being absorbed into vermiculite particles which then are coated with a polymeric coating material. A variety of cross-linking, condensing, and gelling agents may be used to strengthen and crosslink the polymer.

Abstract: Biological materials are immobilized within condensed polyalkyleneimine polymers. Condensation of the polymer is accomplished by bridging the amine groups of polyalkyleneimine polymer chains with a polycarboxylic acid, in the presence of a condensing agent.

Abstract: A process for immobilizing a biological material which can be a protein, a coenzyme having at least one primary or secondary amino group per molecule, an admixture of said coenzyme and an enzyme which is mediated by said coenzyme, or an antibiotic having at least one primary or secondary amino group per molecule, wherein the biological material is contacted with an excess of an isocyanate-capped liquid polyurethane prepolymer in the absence of water, and the resulting mixture is cured by contacting it with a curing agent to cure the prepolymer and to immobilize the biological material. The resulting mixture can be cured under foam-forming conditions or under nonfoam-forming conditions. The resulting mixture can be formed into a predetermined shape before or during curing or coated onto a surface before or during curing.

Abstract: A process for immobilizing a biological material which can be a protein, a coenzyme having at least one primary or secondary amino group per molecule, an admixture of said coenzyme and an enzyme which is mediated by said coenzyme, or an antibiotic having at least one primary or secondary amino group per molecule, wherein the biological material is contacted with an excess of an isocyanate-capped liquid polyurethane prepolymer in the absence of water, and the resulting mixture is cured by contacting it with a curing agent to cure the prepolymer and to immobilize the biological material. The resulting mixture can be cured under foam-forming conditions or under nonfoam-forming conditions. The resulting mixture can be formed into a predetermined shape before or during curing or coated onto a surface before or during curing.

Abstract: A protein which can be an enzyme is immobilized by: (a) admixing the protein and an isocyanate-capped liquid polyurethane prepolymer to form an intermediate product; and (b) foaming the intermediate product by reacting it with water to form a polyurethane foam comprising the immobilized enzyme.