Kazutake Shimada

New derivatization reagents for the resolution of amino acid enantiomers by high-performance liquid chromatography

Junichi Goto, Masatoshi Hasegawa, Setsuko Nakamura et al. · Journal of Chromatography A · 1978 · 84 citations

Pharmacy, Pharmaceutical Analysis, Chromatographic Analysis +13

Studies on Neurosteroids XXV. Influence of a 5.ALPHA.-Reductase Inhibitor, Finasteride, on Rat Brain Neurosteroid Levels and Metabolism

Yoshiyuki Mukai, Tatsuya Higashi, Yukiko Nagura et al. · Biological and Pharmaceutical Bulletin · 2008 · 72 citations · Full text

Life Sciences, Endocrinology, Pharmacology +17

Simultaneous determination of salivary testosterone and dehydroepiandrosterone using LC–MS/MS: Method development and evaluation of applicability for diagnosis and medication for late-onset hypogonadism

Yujin Shibayama, Tatsuya Higashi, Kazutake Shimada et al. · Journal of Chromatography B · 2008 · 71 citations

Medicine, Biochemistry, Endocrinology +17

Alternative Procedure for Charged Derivatization to Enhance Detection Responses of Steroids in Electrospray Ionization-MS

Tatsuya Higashi, T. NISHIO, Noriko Hayashi et al. · Chemical and Pharmaceutical Bulletin · 2007 · 63 citations · Full text

Life Sciences, Biochemistry, Analytical Chemistry +14

Simultaneous determination of 17α-hydroxypregnenolone and 17α-hydroxyprogesterone in dried blood spots from low birth weight infants using LC–MS/MS

Tatsuya Higashi, T. NISHIO, Syouko Uchida et al. · Journal of Pharmaceutical and Biomedical Analysis · 2008 · 60 citations

Medicine, Endocrinology, Pediatrics +7