Kouwa Yamashita : rechercher sur Z-Library

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1

Recent development of chemical derivatization in LC–MS for biomedical approaches

Ohno, Ken-ichi, Yamashita, Kouwa

Journal:

Année:

2015

Langue:

english

Fichier:

PDF, 1.07 MB

english, 2015

2

Measurement of plasma etoposide by radio-immunoassay

Kouwa Yamashita, Keiko Watanabe, Hideki Takayama, Masataka Ishibashi, Hiroshi Miyazaki

Journal:

Journal of Pharmaceutical and Biomedical Analysis

Année:

1987

Langue:

english

Fichier:

PDF, 589 KB

english, 1987

3

Use of a new silylating agent for separation of bile acids and cholesterol by selected ion monitoring with the computer controlled intensity matching technique

Hiroshi Miyazaki, Masataka Ishibashi, Kouwa Yamashita

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Année:

1978

Langue:

english

Fichier:

PDF, 571 KB

english, 1978

4

Dimethylisopropylsilyl ether derivatives in gas chromatography mass spectrometry of hydroxylated steroids

Hiroshi Miyazaki, Masataka Ishibashi, Kouwa Yamashita

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Année:

1979

Langue:

english

Fichier:

PDF, 478 KB

english, 1979

5

Dimethylisopropylsilyl ether derivatives in gas chromatography mass spectrometry of prostaglandins and thromboxane B2

Hiroshi Miyazaki, Masataka Ishibashi, Kouwa Yamashita, Yuko Nishikawa, Makoto Katori

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Année:

1981

Langue:

english

Fichier:

PDF, 617 KB

english, 1981

6

Diethylsilyl ether and diethylsiliconide derivatives in gas chromatography mass spectrometry of hydroxylated steroids

Hiroshi Miyazaki, Masataka Ishibashi, Masahiro Itoh, Kouwa Yamashita

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Année:

1984

Langue:

english

Fichier:

PDF, 489 KB

english, 1984

7

Assay of plasma leupeptin using the reversible binding of leupeptin to bovine pancreatic trypsin

Kouwa Yamashita, Keiko Watanabe, Hideki Takayama, Shigeru Mizuguchi, Masataka Ishibashi, Hiroshi Miyazaki, Wataru Tanaka, Hamao Umezawa

Journal:

Analytical Biochemistry

Année:

1986

Langue:

english

Fichier:

PDF, 372 KB

english, 1986

8

A heterologous enzyme immunoassay of prostaglandin E2 using a stable enzyme-labeled hapten mimic

Fumiaki Shono, Kazushige Yokota, Kazumi Horie, Shozo Yamamoto, Kouwa Yamashita, Keiko Watanabe, Hiroshi Miyazaki

Journal:

Analytical Biochemistry

Année:

1988

Langue:

english

Fichier:

PDF, 664 KB

english, 1988

9

Immunoaffinity purification of 11-dehydro-thromboxane B2 from human urine and plasma for quantitative analysis by radioimmunoassay

Yoko Hayashi, Fumiaki Shono, Shozo Yamamoto, Wataru Takasaki, Akihiko Nakagawa, Keiko Watanabe, Kouwa Yamashita, Hiroshi Miyazaki

Journal:

Analytical Biochemistry

Année:

1990

Langue:

english

Fichier:

PDF, 1.10 MB

english, 1990

10

Use of novel picolinoyl derivatization for simultaneous quantification of six corticosteroids by liquid chromatography-electrospray ionization tandem mass spectrometry

Kouwa Yamashita, Madoka Takahashi, Satoshi Tsukamoto, Mitsuteru Numazawa, Mitsunobu Okuyama, Seijiro Honma

Journal:

Journal of Chromatography A

Année:

2007

Langue:

english

Fichier:

PDF, 735 KB

english, 2007

11

Development of sensitive derivatization method for aldosterone in liquid chromatography–electrospray ionization tandem mass spectrometry of corticosteroids

Kouwa Yamashita, Mitsunobu Okuyama, Risa Nakagawa, Seijiro Honma, Fumitoshi Satoh, Ryo Morimoto, Sadayoshi Ito, Madoka Takahashi, Mitsuteru Numazawa

Journal:

Journal of Chromatography A

Année:

2008

Langue:

english

Fichier:

PDF, 636 KB

english, 2008

12

Fusaric Acid as a Novel Proton-Affinitive Derivatizing Reagent for Highly Sensitive Quantification of Hydroxysteroids by LC-ESI-MS/MS

Kouwa Yamashita, Keiko Yamazaki, Sachiko Komatsu, Mitsuteru Numazawa

Journal:

Journal of the American Society for Mass Spectrometry

Année:

2010

Langue:

english

Fichier:

PDF, 396 KB

english, 2010

13

Microdetermination of prostaglandins and thromboxane B2 by gas chromatography using an electron-capture detector

Hiroshi Miyazaki, Masataka Ishibashi, Kouwa Yamashita, Izumi Ohguchi, Hisashi Saitoh, Hiroshi Kurono, Masao Shimono, Makoto Katori

Journal:

Journal of Chromatography A

Année:

1982

Langue:

english

Fichier:

PDF, 867 KB

english, 1982

14

Use of silylating agents for the identification of hydroxylated steroids by gas chromatography and gas chromatography-mass spectrometry : Discrimination between phenolic and alcoholic hydroxyl groups

Hiroshi Miyazaki, Masataka Ishibashi, Masahiro Itoh, Kouwa Yamashita, Toshio Nambara

Journal:

Journal of Chromatography A

Année:

1977

Langue:

english

Fichier:

PDF, 505 KB

english, 1977

15

Microdetermination of prostaglandins and thromboxane B2 by capillary gas chromatography and negative ion chemical ionization mass spectrometry

Hiroshi Miyazaki, Masataka Ishibashi, Hideki Takayama, Kouwa Yamashita, Izumi Suwa, Makoto Katori

Journal:

Journal of Chromatography A

Année:

1984

Langue:

english

Fichier:

PDF, 593 KB

english, 1984

16

Gas chromatography—mass spectrometry of some prostanoids with new derivatizing agents : Application to the analysis of 13,14-dihydro-15-ketoprostaglandin F2α

Kouwa Yamashita, Keiko Watanabe, Masataka Ishibashi, Hiroshi Miyazaki, Kazushige Yokota, Kazumi Horie, Shozo Yamamoto

Journal:

Journal of Chromatography A

Année:

1987

Langue:

english

Fichier:

PDF, 799 KB

english, 1987

17

Microdetermination of 11-dehydrothromboxane B2 in human urine by gas chromatography selected-ion monitoring

Keiko Watanabe, Kouwa Yamashita, Masataka Ishibashi, Yoko Hayashi, Shozo Yamamoto, Hiroshi Miyazaki

Journal:

Journal of Chromatography A

Année:

1989

Langue:

english

Fichier:

PDF, 751 KB

english, 1989

18

Diethylhydrogensilyl-cyclic diethylsilylene derivatives in gas chromatography-mass spectrometry of prostanoids : III. Fα-prostaglandins and thromboxane B2 derivatives

Masataka Ishibashi, Keiko Watanabe, Kouwa Yamashita, Hiroshi Miyazaki, Stefan Krolik

Journal:

Journal of Chromatography A

Année:

1987

Langue:

english

Fichier:

PDF, 941 KB

english, 1987

19

Determination of deoxyspergualin by gas chromatography-selected-ion monitoring

Kouwa Yamashita, Keiko Watanabe, Rumiko Koga, Shigeru Mizuguchi, Yutaka Hashimoto, Teruya Nakamura, Hamao Umezawa

Journal:

Journal of Chromatography B: Biomedical Sciences and Applications

Année:

1988

Langue:

english

Fichier:

PDF, 676 KB

english, 1988

20

High-performance liquid chromatographic determination of deoxyspergualin in dog plasma with ultraviolet detection

Rumiko Nakanuma, Keiko Watanabe, Kouwa Yamashita, Shigeru Mizuguchi, Yutaka Hashimoto, Teruya Nakamura, Hamao Umezawa

Journal:

Journal of Chromatography B: Biomedical Sciences and Applications

Année:

1990

Langue:

english

Fichier:

PDF, 293 KB

english, 1990

21

Measurement of the novel decapeptide cetrorelix in human plasma and urine by liquid chromatography–electrospray ionization mass spectrometry

Makoto Niwa, Keiko Enomoto, Kouwa Yamashita

Journal:

Journal of Chromatography B: Biomedical Sciences and Applications

Année:

1999

Langue:

english

Fichier:

PDF, 251 KB

english, 1999

22

Use of new silylating agents for separation and identification of prostablandins by gas chromatography and gas chromatography—mass spectrometry

Hiroshi Miyazaki, Masataka Ishibashi, Kouwa Yamashita, Makoto Katori

Journal:

Journal of Chromatography A

Année:

1978

Langue:

english

Fichier:

PDF, 503 KB

english, 1978

23

Dimethylisopropylsilyl ether derivatives in gas chromatography-mass spectrometry of some prostanoids : Application to the microdetermination of 15-ketoprostaglandin F2α formed by enzymatic conversion of PGF2α in vitro

Kouwa Yamashita, Keiko Watanabe, Masataka Ishibashi, Makoto Katori, Hiroshi Miyazaki

Journal:

Journal of Chromatography B: Biomedical Sciences and Applications

Année:

1988

Langue:

english

Fichier:

PDF, 754 KB

english, 1988

24

Regional Distribution of Prostaglandins D2, E2, and F2α and Related Enzymes in Postmortem Human Brain

Toshiya Ogorochi, Shuh Narumiya, Noboru Mizuno, Kouwa Yamashita, Hiroshi Miyazaki, Osamu Hayaishi

Journal:

Journal of Neurochemistry

Année:

1984

Langue:

english

Fichier:

PDF, 998 KB

english, 1984

25

Tenuipyrone, a Novel Skeletal Polyketide from the Entomopathogenic Fungus, Isaria tenuipes, Cultivated in the Presence of Epigenetic Modifiers

Asai, Teigo, Chung, Yu-Ming, Sakurai, Hiroaki, Ozeki, Tomoji, Chang, Fang-Rong, Yamashita, Kouwa, Oshima, Yoshiteru

Journal:

Organic Letters

Année:

2012

Langue:

english

Fichier:

PDF, 219 KB

english, 2012

26

ChemInform Abstract: Tenuipyrone, a Novel Skeletal Polyketide from the Entomopathogenic Fungus, Isaria tenuipes, Cultivated in the Presence of Epigenetic Modifiers.

Teigo Asai, Yu-Ming Chung, Hiroaki Sakurai, Tomoji Ozeki, Fang-Rong Chang, Kouwa Yamashita, Yoshiteru Oshima

Journal:

Année:

2012

Fichier:

PDF, 21 KB

2012

27

Aromatic polyketide glycosides from an entomopathogenic fungus, Cordyceps indigotica

Teigo Asai, Takashi Yamamoto, Yu-Ming Chung, Fang-Rong Chang, Yang-Chang Wu, Kouwa Yamashita, Yoshiteru Oshima

Journal:

Tetrahedron Letters

Année:

2012

Langue:

english

Fichier:

PDF, 461 KB

english, 2012

28

Dihydrobenzofurans as cannabinoid receptor ligands from Cordyceps annullata, an entomopathogenic fungus cultivated in the presence of an HDAC inhibitor

Teigo Asai, Dan Luo, Yutaro Obara, Tohru Taniguchi, Kenji Monde, Kouwa Yamashita, Yoshiteru Oshima

Journal:

Tetrahedron Letters

Année:

2012

Langue:

english

Fichier:

PDF, 611 KB

english, 2012

29

Enzyme immunoassay of thromboxane B2

Yoko Hayashi, Natsuo Ueda, Kazushige Yokota, Sumio Kawamura, Fumitaka Ogushi, Yoshiko Yamamoto, Shozo Yamamoto, Kanzen Nakamura, Kouwa Yamashita, Hiroshi Miyazaki, Kaneyoshi Kato, Shinji Terao

Journal:

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism

Année:

1983

Langue:

english

Fichier:

PDF, 771 KB

english, 1983

30

Enzyme immunoassay of 6-ketoprostaglandin F1α in a solid phase

Takeharu Tonai, Kazushige Yokota, Tomoko Yano, Yoko Hayashi, Shozo Yamamoto, Kouwa Yamashita, Hiroshi Miyazaki

Journal:

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism

Année:

1985

Langue:

english

Fichier:

PDF, 973 KB

english, 1985

31

Development of enzyme imnmnoassay for serum 13,14-dihydro-15-ketoprostaglandin F2α

Yokota Kazushige, Horie Kazumi, Hayashi Yoko, Yamamoto Shozo, Yamashita Kouwa, Miyazaki Hiroshi

Journal:

Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism

Année:

1986

Langue:

english

Fichier:

PDF, 808 KB

english, 1986

32

Regiospecific and enantioselective metabolism of 8,9-epoxyeicosatrienoic acid by cyclooxygenase

Ji Y. Zhang, Chandra Prakash, Kouwa Yamashita, Ian A. Blair

Journal:

Biochemical and Biophysical Research Communications

Année:

1992

Langue:

english

Fichier:

PDF, 445 KB

english, 1992

33

Mass spectrometric analysis of oxygenations in aromatization of androst-4-ene-3,6,17-trione, a suicide substrate of aromatase, by placental microsomes. Isotope effect and stereochemistry

Mitsuteru Numazawa, Madoka Takahashi, Masao Nagaoka, Wakako Handa, Kouwa Yamashita

Journal:

The Journal of Steroid Biochemistry and Molecular Biology

Année:

2007

Langue:

english

Fichier:

PDF, 417 KB

english, 2007

34

Aromatase inactivation by 2-substituted derivatives of the suicide substrate androsta-1,4-diene-3,17-dione

Madoka Takahashi, Wakako Handa, Hiromi Umeta, Saki Ishikawa, Kouwa Yamashita, Mitsuteru Numazawa

Journal:

The Journal of Steroid Biochemistry and Molecular Biology

Année:

2009

Langue:

english

Fichier:

PDF, 646 KB

english, 2009

35

Highly sensitive and specific analysis of sterol profiles in biological samples by HPLC–ESI–MS/MS

Akira Honda, Teruo Miyazaki, Tadashi Ikegami, Junichi Iwamoto, Kouwa Yamashita, Mitsuteru Numazawa, Yasushi Matsuzaki

Journal:

The Journal of Steroid Biochemistry and Molecular Biology

Année:

2010

Langue:

english

Fichier:

PDF, 294 KB

english, 2010

36

Assay of labile estrogen o-quinones, potent carcinogenic molecular species, by high performance liquid chromatography–electrospray ionization tandem mass spectrometry with phenazine derivatization

Kouwa Yamashita, Akina Masuda, Yuka Hoshino, Sachiko Komatsu, Mitsuteru Numazawa

Journal:

The Journal of Steroid Biochemistry and Molecular Biology

Année:

2010

Langue:

english

Fichier:

PDF, 899 KB

english, 2010

37

Synthesis of pyridine-carboxylate derivatives of hydroxysteroids for liquid chromatography–electrospray ionization-mass spectrometry

Kouwa Yamashita, Sayuri Kobayashi, Satoshi Tsukamoto, Mitsuteru Numazawa

Journal:

Année:

2007

Langue:

english

Fichier:

PDF, 351 KB

english, 2007

38

Highly sensitive determination of estrone and estradiol in human serum by liquid chromatography–electrospray ionization tandem mass spectrometry

Kouwa Yamashita, Mitsunobu Okuyama, Yoko Watanabe, Seijiro Honma, Sayuri Kobayashi, Mitsuteru Numazawa

Journal:

Année:

2007

Langue:

english

Fichier:

PDF, 303 KB

english, 2007

39

Simultaneous determination of tetrahydrocortisol, allotetrahydrocortisol and tetrahydrocortisone in human urine by liquid chromatography-electrospray ionization tandem mass spectrometry

Kouwa Yamashita, Risa Nakagawa, Mitsunobu Okuyama, Seijiro Honma, Madoka Takahashi, Mitsuteru Numazawa

Journal:

Année:

2008

Langue:

english

Fichier:

PDF, 801 KB

english, 2008

40

Aromatization of androstenedione and 16α-hydroxyandrostenedione in human placental microsomes: Kinetic analysis of inhibition by the 19-oxygenated and 3-deoxy analogs

Mitsuteru Numazawa, Yoko Watari, Sachiko Komatsu, Kouwa Yamashita, Masao Nagaoka

Journal:

Année:

2008

Langue:

english

Fichier:

PDF, 535 KB

english, 2008

41

Chemical aromatization of 19-hydroxyandrosta-1,4-diene-3,17-dione with acid or alkaline: Elimination of the 19-hydroxymethyl group as formaldehyde

Mitsuteru Numazawa, Kouwa Yamashita, Nao Kimura, Madoka Takahashi

Journal:

Année:

2009

Langue:

english

Fichier:

PDF, 275 KB

english, 2009

42

Development of highly sensitive quantification method for testosterone and dihydrotestosterone in human serum and prostate tissue by liquid chromatography–electrospray ionization tandem mass spectrometry

Kouwa Yamashita, Yoshimichi Miyashiro, Hitoe Maekubo, Mitsunobu Okuyama, Seijiro Honma, Madoka Takahashi, Mitsuteru Numazawa

Journal:

Année:

2009

Langue:

english

Fichier:

PDF, 364 KB

english, 2009

43

6β,19-Bridged androstenedione analogs as aromatase inhibitors

Sachiko Komatsu, Ayaka Yaguchi, Kouwa Yamashita, Masao Nagaoka, Mitsuteru Numazawa

Journal:

Année:

2009

Langue:

english

Fichier:

PDF, 391 KB

english, 2009

44

Probing the binding pocket of the active site of aromatase with 2-phenylaliphatic androsta-1,4-diene-3,17-dione steroids

Madoka Takahashi, Kouwa Yamashita, Mitsuteru Numazawa

Journal:

Année:

2010

Langue:

english

Fichier:

PDF, 586 KB

english, 2010

45

Highly oxidized ergosterols and isariotin analogs from an entomopathogenic fungus, Gibellula formosana, cultivated in the presence of epigenetic modifying agents

Teigo Asai, Yu-Ming Chung, Hiroaki Sakurai, Tomoji Ozeki, Fang-Rong Chang, Yang-Chang Wu, Kouwa Yamashita, Yoshiteru Oshima

Journal:

Année:

2012

Langue:

english

Fichier:

PDF, 496 KB

english, 2012

46

Mechanistic aspects of rearrangement of 16α-hydroxy-17-keto steroids to the 17β-hydroxy-16-keto isomers

Mitsuteru Numazawa, Masao Nagaoka, Hisao Matsuzaki, Kouwa Yamashita, Sachiko Komatsu, Yoshio Osawa

Journal:

Année:

2008

Langue:

english

Fichier:

PDF, 570 KB

english, 2008

47

Structures and Biomimetic Synthesis of Novel α-Pyrone Polyketides of an Endophytic Penicillium sp. in Catharanthus roseus

Asai, Teigo, Luo, Dan, Yamashita, Kouwa, Oshima, Yoshiteru

Journal:

Organic Letters

Année:

2013

Langue:

english

Fichier:

PDF, 535 KB

english, 2013

48

Determination of testosterone concentrations in rat plasma using liquid chromatography–atmospheric pressure chemical ionization mass spectrometry combined with ethyl oxime and acetyl ester derivatization

Makoto Niwa, Noriko Watanabe, Hisashi Ochiai, Kouwa Yamashita

Journal:

Journal of Chromatography B

Année:

2005

Langue:

english

Fichier:

PDF, 196 KB

english, 2005

49

Benzophenones from an Endophytic Fungus, Graphiopsis chlorocephala , from Paeonia lactiflora Cultivated in the Presence of an NAD + -Dependent HDAC Inhibitor

Asai, Teigo, Otsuki, Sae, Sakurai, Hiroaki, Yamashita, Kouwa, Ozeki, Tomoji, Oshima, Yoshiteru

Journal:

Organic Letters

Année:

2013

Langue:

english

Fichier:

PDF, 686 KB

english, 2013

50

An Innovative LC-MS/MS-Based Method for Determining CYP 17 and CYP 19 Activity in the Adipose Tissue of Pre- and Postmenopausal and Ovariectomized Women Using 13 C-Labeled Steroid Substrates

Kinoshita, Toshihiko, Honma, Seijiro, Shibata, Yasuhiro, Yamashita, Kouwa, Watanabe, Yoko, Maekubo, Hitoe, Okuyama, Mitsunobu, Takashima, Akiko, Takeshita, Naoki

Journal:

Journal of Clinical Endocrinology & Metabolism

Année:

2014

Langue:

english

Fichier:

PDF, 700 KB

english, 2014