Showa Denko K.k.

Showa Denko Kabushiki Kaisha

Koichi Wada

Nobuaki Ishii

Kazuo Sekiguchi

Michihiro Takama

Hiroyuki Takahashi

Shinobu Ito

Kotaro Yano

Keiji Kawasaki

Yasuo Saito

Nobutake Mihara

Yoshihiko Hosaki

Mitsuharu Irie

Cosmetic preparation, surface-hydrophobized silica-coated metal oxide particles, sol of silica-coated metal oxide, and processes for producing these

Homogeneously surface-fluorinated metal oxide particulates, process for manufacturing the same, and use of the same

Cosmetics comprising silica-coated metal oxide powder having a thickness of the silica coating of 0.1 to 100 nm, and a photocatalytic activity as measured by tetralin auto-oxidation method of 6 mmH,O/min or less. Silica-coated metal oxide powder coated with a silica coating having an absorption peak intensity ratio I (I&equals;I,/I,, wherein I,is an absorption peak intensity at 1,150 to 1,250 cm,and I,is an absorption peak intensity at 1,000 to 1,100 cm,) between the infrared absorption spectra in the region of 1,150 to 1,250 cm,and the region of 1,000 to 1,100 cm,of 0.2 or more, and having a refractive index of 1.435 or more.

Cosmetics, silica-coated metal oxide powder and production method therefor

A process for purifying an .alpha.-amino acid containing cyano impurities comprising heating an aqueous solution of the .alpha.-amino acid in the form of its alkali metal salt in the presence of an alkali metal hydroxide to decompose the cyano impurities.

Process for purifying .alpha.-amino acids

Growing community of inventors

Kawasaki, Japan

Koichi Wada