Kao Corporation

Masafumi Shonaka

Yuichi Hioki

Masaharu Hayashi

Keiko Hasebe

Tadashi Moriyama

Yasuhiro Doi

Yoshinori Tamura

Hiroshi Sonohara

Described is a detergent composition comprising (A) a sulfate ester surfactant, (B) at least one surfactant selected from amphoteric surfactants, amine oxide surfactants, alkanol amide surfactants and amide amino-acid surfactants, (C) a cationic bactericide and (D) a metal chelating agent, the weight ratio of said (A) to (B) being 1-50 and the content of said (C) being 0.2 wt. % to 5 wt. %. The detergent composition according to the present invention has excellent detergency, foamability and foam durability and at the same time, has high bactericidal effects because it can be mixed stably with a cationic bactericide.

Detergent composition

Antifoaming agent for fermentation and fermentation production process

Disclosed herein are antifoaming agents for fermentation which include, as active ingredient at least one of (a) a reaction product obtained by adding at least one alkylene oxide to a mixture of a fat and/or oil with a trihydric or still higher polyhydric alcohol, or (b) a compound represented by the following general formula (1): ##STR1## wherein n stands for a number of 2-50, R.sup.1, R.sup.2 and R.sup.3 mean individually a hydrogen atom or an acyl group having 2-31 carbon atoms, x denotes an alkylene group having 2-4 carbon atoms, and m1, m2 and m3 are individually a number of 0-200, an L-amino acid-producing medium containing either one of these components, and a production process for L-amino acids making use of this medium. The use of this antifoaming agent permits the quick, sure and durable suppression of bubbling during incubation, and the overall production of the L-amino acid is significantly improved.

Antifoaming agent for fermentation, L-amino acid-producing medium and

Growing community of inventors

Wakayama, Japan

Masafumi Shonaka