Sumitomo Chemical Company, Limited

Rigaku Corporation

Sumitomo Pharmaceuticals Company Limited

Shin Tanaka

Yoshiyuki Kataoka

Takashi Deguchi

Kenichi Hirose

Masatomo Fukasawa

Kazuo Kumagai

Masahito Sekiguchi

Shun Inokuma

Akio Fukui

Koichi Moriguchi

Yasushi Kusakabe

Shinji Nakamura

Koji Iwamoto

Kiyoshi Taya

An X-ray fluorescence spectrometer according to the present invention includes a calculation unit () configured to calculate a content of each element in a sample () using an FP method, wherein the calculation unit () is configured to: in order to take into consideration an influence of unmeasured elements for which the fluorescent X-rays are not measured, use shorter-wavelength scattered X-rays of primary X-rays having a wavelength of 0.05 nm or more and 0.075 nm or less, and longer-wavelength scattered X-rays of the primary X-rays having a wavelength of 0.11 nm or more and 0.23 nm or less as scattered X-rays whose intensities are measured by a detection unit (), assume a mean atomic number for elements other than hydrogen included in the unmeasured elements, and assume a content for hydrogen.

X-ray fluorescence spectrometer

A quantitative analysis method, which is performed by an X-ray fluorescence spectrometer, includes: a step of acquiring a plurality of spectra at least having a first peak at a first energy position from a sample containing a plurality of elements under different measurement conditions; a step of designating, from among the plurality of spectra, a primary spectrum and a secondary spectrum having a second peak at a second energy position; a first fitting step of performing a fitting on the first peak included in the secondary spectrum to calculate a background intensity at the second energy position due to the first peak; and a second fitting step of performing a fitting on the first peak of the primary spectrum and performing a fitting on the second peak of the secondary spectrum under a condition that the calculated background intensity is included at the second energy position.

Quantitative analysis method, quantitative analysis program, and X-ray fluorescence spectrometer

4-tert.-Butylcyclohexanol having a larger content of its cis-isomer is prepared by hydrogenating 4-tert.-butylphenol in a solvent in the presence of a rhodium catalyst and a compound selected from the group consisting of hydrogen chloride and (anhydrous) sulfuric acid. Furthermore, 4-tert.-butylcyclohexanol obtained by the above hydrogenation is acetylated to give 4-tert.-butylcyclohexyl acetate.

Processes for preparing 4-tert.-butylcyclohexanol and

The present invention involves the production of octahydrocoumarins from coumarins and/or 3,4-dihydrocoumarins in good yields by a simple process which can be industrially carried out, by reducing coumarins and/or 3,4-dihydrocoumarins to octohydrocoumarins with hydrogen in the presence of an alcohol and a ruthenium catalyst, and optionally heating resultant 3-(2-hydroxycyclohexyl) propionate contained in the reduction reaction mixture to conduct cyclization/dealcoholization and convert same to octohydrocoumarins.

Process for producing octahydrocoumarins and same as a product of such

A novel antibiotic of the formula: ##STR1## wherein R is a hydrogen atom or a methyl group and preparation of the antibiotic by cultivating Nocardia sp. SC-4710.

Antibiotics, and their production

A process for preparing acid amides by hydration of the corresponding nitrile compounds with water in the presence of a catalyst, characterized in that the catalyst is the one prepared by treating a vanadate with a cuprous salt or with at least two of metallic copper, a cuprous salt and a cupric salt.

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Ibaraki, Japan

Shin Tanaka