Advances in determination of vitamin D related compounds in biological samples using liquid chromatography–mass spectrometry: A review
Higashi, Tatsuya, Shimada, Kazutake, Toyo’oka, Toshimasa
Published in Journal of chromatography. B (15.06.2010)
Published in Journal of chromatography. B (15.06.2010)
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Journal Article
Conference Proceeding
Liquid chromatography–tandem mass spectrometric method for the determination of salivary 25-hydroxyvitamin D3: a noninvasive tool for the assessment of vitamin D status
Higashi, Tatsuya, Shibayama, Yujin, Fuji, Mihoko, Shimada, Kazutake
Published in Analytical and bioanalytical chemistry (01.05.2008)
Published in Analytical and bioanalytical chemistry (01.05.2008)
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Journal Article
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
Shibayama, Yujin, Higashi, Tatsuya, Shimada, Kazutake, Odani, Akira, Mizokami, Atsushi, Konaka, Hiroyuki, Koh, Eitetsu, Namiki, Mikio
Published in Journal of chromatography. B (01.09.2009)
Published in Journal of chromatography. B (01.09.2009)
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Journal Article
Conference Proceeding
2-Hydrazino-1-methylpyridine: a highly sensitive derivatization reagent for oxosteroids in liquid chromatography–electrospray ionization-mass spectrometry
Higashi, Tatsuya, Yamauchi, Akinori, Shimada, Kazutake
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (25.10.2005)
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (25.10.2005)
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Journal Article
A specific LC/ESI-MS/MS method for determination of 25-hydroxyvitamin D3 in neonatal dried blood spots containing a potential interfering metabolite, 3-epi-25-hydroxyvitamin D3
Higashi, Tatsuya, Suzuki, Masahiro, Hanai, Junji, Inagaki, Shinsuke, Min, Jun Zhe, Shimada, Kazutake, Toyo'oka, Toshimasa
Published in Journal of separation science (01.04.2011)
Published in Journal of separation science (01.04.2011)
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Journal Article
Gas chromatography and high-performance liquid chromatography of natural steroids
Shimada, Kazutake, Mitamura, Kuniko, Higashi, Tatsuya
Published in Journal of Chromatography A (23.11.2001)
Published in Journal of Chromatography A (23.11.2001)
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Book Review
Journal Article
Determination of salivary dehydroepiandrosterone using liquid chromatography–tandem mass spectrometry combined with charged derivatization
Higashi, Tatsuya, Shibayama, Yujin, Shimada, Kazutake
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (01.02.2007)
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (01.02.2007)
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Journal Article
Studies on Neurosteroids XXVI. Fluoxetine-Evoked Changes in Rat Brain and Serum Levels of Neuroactive Androgen, 5α-Androstane-3α,17β-diol
Higashi, Tatsuya, Nagura, Yukiko, Shimada, Kazutake, Toyo'oka, Toshimasa
Published in Biological and Pharmaceutical Bulletin (01.09.2009)
Published in Biological and Pharmaceutical Bulletin (01.09.2009)
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Journal Article
Procedure for increasing the detection responses of estrogens in LC-MS based on introduction of a nitrobenzene moiety followed by electron capture atmospheric pressure chemical ionization
Higashi, Tatsuya, Takayama, Naoki, Nishio, Tadashi, Taniguchi, Emi, Shimada, Kazutake
Published in Analytical and bioanalytical chemistry (01.10.2006)
Published in Analytical and bioanalytical chemistry (01.10.2006)
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Journal Article
Determination of Digoxin in Human Serum Using Stable Isotope Dilution Liquid Chromatography/Electrospray Ionization-Tandem Mass Spectrometry
Mitamura, Kuniko, Horikawa, Aki, Yamane, Yuko, Ikeda, Yukari, Fujii, Youichi, Shimada, Kazutake
Published in Biological & Pharmaceutical Bulletin (01.09.2007)
Published in Biological & Pharmaceutical Bulletin (01.09.2007)
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Journal Article
Liquid chromatography–tandem mass spectrometric method for determination of salivary 17α-hydroxyprogesterone: A noninvasive tool for evaluating efficacy of hormone replacement therapy in congenital adrenal hyperplasia
Shibayama, Yujin, Higashi, Tatsuya, Shimada, Kazutake, Kashimada, Ken-ichi, Onishi, Toshikazu, Ono, Makoto, Miyai, Kentaro, Mizutani, Shuki
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (01.05.2008)
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (01.05.2008)
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Journal Article
Analyses of Biologically Active Steroids: Antitumor Active OSW-1 and Cardiotonic Marinobufotoxin, by Matrix-Assisted Laser Desorption/Ionization Quadrupole Ion Trap Time-of-Flight Tandem Mass Spectrometry
Kasai, Hiroko, Tsubuki, Masayoshi, Shimada, Kazutake, Nambara, Toshio, Honda, Toshio
Published in Chemical & pharmaceutical bulletin (01.09.2009)
Published in Chemical & pharmaceutical bulletin (01.09.2009)
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Journal Article
Application of 4-(4-Nitrophenyl)-1,2,4-triazoline-3,5-dione to Analysis of 25-Hydroxyvitamin D3 in Human Plasma by Liquid Chromatography/Electron Capture Atmospheric Pressure Chemical Ionization-Mass Spectrometry
HIGASHI, Tatsuya, YAMAUCHI, Akinori, SHIMADA, Kazutake
Published in Analytical Sciences (01.06.2003)
Published in Analytical Sciences (01.06.2003)
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Journal Article
Simultaneous Determination of 25-Hydroxyvitamin D2 and 25-Hydroxyvitamin D3 in Human Plasma by Liquid Chromatography-Tandem Mass Spectrometry Employing Derivatization with a Cookson-Type Reagent
HIGASHI, Tatsuya, AWADA, Daisuke, SHIMADA, Kazutake
Published in Biological & pharmaceutical bulletin (01.07.2001)
Published in Biological & pharmaceutical bulletin (01.07.2001)
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Journal Article
Liquid chromatography–mass spectrometric assay of androstenediol in prostatic tissue: Influence of androgen deprivation therapy on its level
Higashi, Tatsuya, Takayama, Naoki, Kyutoku, Mariko, Shimada, Kazutake, Koh, Eitetsu, Namiki, Mikio
Published in Steroids (01.11.2006)
Published in Steroids (01.11.2006)
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Journal Article