Abstract: Provided is a method for activating an oxygenase-containing composition, characterized by dissolving or dispersing a composition containing oxygenase in an aqueous medium containing oxygen in an amount that exceeds the saturated dissolved oxygen concentration in an atmospheric environment at normal temperature and normal pressure.

Abstract: Provided is a polychlorinated biphenyl-decomposing composition obtained according to a method comprising respectively culturing at least one main microbial strain belonging to Comamonas species and having biphenyl dioxygenase, and at least one complementary microbial strain selected from the group consisting of Pseudomonas species, Achromobacter species, Rhodococcus species and Stenotrophomonas species and having biphenyl dioxygenase, and mixing at least two types of microbial cells recovered from each of the culture media. A composition containing these compounded microorganisms is useful for efficiently decomposing or detoxifying comparatively low concentrations of PCBs present in large amounts in waste products contaminated with polychlorinated biphenyls.

Abstract: A granular vinyl chloride resin having a mixture comprising the following vinyl chloride resin particles (A), (B) and (C) as main components granulated to have a spherical shape with a diameter of from 50 to 300 .mu.m or a cylindrical shape with a diameter of from 0.1 to 20 mm:(A) from 90 to 10% by weight of fine particles with diameters within a range of not larger than 3 .mu.m (hereinafter referred to as fine particles (A)),(B) from 10 to 90% by weight of particles with diameters within a range of from 5 to 65 .mu.m (hereinafter referred to as particles (B)), and(C) from 0 to 10% by weight of particles with diameters other than those of particles (A) and (B).

Abstract: A method for producing a vinyl chloride resin, which comprises spray drying a vinyl chloride polymer latex by means of a double fluid nozzle, wherein steam or a gas mixture of steam and an inert gas is used as spray gas.

Abstract: A process for producing a foamed polyvinyl alcohol film, which comprises mechanically foaming an aqueous solution containing a polyvinyl alcohol and a plasticizer, coating the foamed solution on the substrate, followed by heat-drying.