Kurashiki Boseki Kabushiki Kaisha

Eiichi Hirai

Masao Endo

Masumi Saito

Toru Nishino

Shigeaki Matsui

Junji Nakamura

A culture cell having discontinuous projecting parts for hanging the culture cell on an upper circumferential portion and a membrane filter on a bottom portion, characterized in that triangular tapered ribs are provided continuously underneath the discontinuous projecting parts.

Culture cell

The present invention provides a gypsum molded product having excellent waterproof properties without impaired strength by adding alkaline metal alkylsiliconates or phenylsiliconates together with calcium hydroxide or calcium oxide to gypsum; poly(.alpha.,.beta.-unsaturated carboxylic acid) may be used in combination with the above, if desired. According to the present invention, the preparation of a gypsum molded product, particularly a gypsum from desulfurization of exhaust gas, is contemplated.

Waterproof gypsum molded product

Present invention provides foamed gypsum moulded articles excellent in sound absorbing property and production thereof. The foamed gypsum moulded article has many foam-cells, and the foam-cells are interconnected through fine passages. The fine passages are formed using as a decomposition catalyst of hydrogen peroxide for expansion a cobalt compound produced by pretreating a water soluble cobalt salt with hydrogen peroxide in the presence of alkali. The foamed gypsum moulded article is preferably applicable to an interial wall, ceiling panel, and the like.

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Takarazuka, Japan

Eiichi Hirai