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Volume 27 (1979)
- Issue 4 Pages 217-
- Issue 3 Pages 135-
- Issue 2 Pages 69-
- Issue 1 Pages 1-
Volume 27, Issue 2
Displaying 1-8 of 8 articles from this issue
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Ikuya Yano, Seiko Toriyama1979 Volume 27 Issue 2 Pages 69-82
Published: June 30, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1459K) -
Hiroshi Kishi, Satoshi Kambe1979 Volume 27 Issue 2 Pages 83-95
Published: June 30, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSMass spectra of 2-thioxo-pyrimidine derivatives were measured and their fragmentation mechanisms were elucidated with the aid of the shift of peaks by substituents and by the deuterium labeling, and with the aid of metastable peaks. Samples tested were(1)6-alkyl or aryl-5-cyano-4-oxo-2-thioxo-1, 2, 3, 4-tetrahydropyrimidine derivatives, (2)6-alkyl or aryl-5-cyano-2, 4-dioxo-1, 2, 3, 4-tetrahydropyrimidine derivativees, (3)6-aryl-4-imino-5-cyano-2-thioxo-1, 2, 3, 4-tetrahydropyrimidine derivatives, (4)6-alkyl or aryl-5-cyano-4-oxo-2-thioxo-1, 2, 3, 4, 5, 6-hexahydropyrimidine derivatives. The characterisitic fragmentation for the 1, 2, 3, 4-tetrahydropyrimidine derivatives was RDA-cleavage. The 4-imino-substituent complicated the fragmentation mechanisms. 1, 2, 3, 4, 5, 6-Hexahydropyrimidinederivatives showed mass spectra quite different from those of 1, 2, 3, 4-tetrahydropyrimidines.View full abstractDownload PDF (1018K) -
I. Anthracycline, Naphthoquinone and Other Quinone AntibioticsKazutaka Fukushima, Tadashi Arai1979 Volume 27 Issue 2 Pages 97-105
Published: June 30, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe field desorption mass spectra of nine quinone antibiotics of various kinds have been studied at different emitter current. All antibiotics give intense molecular or protonated molecular ions at emitter currents above the best anode temperature. Fragment ions which are diagnostic to chemical structures are observed in some antibiotics.View full abstractDownload PDF (730K) -
II. Peptide AntibioticsKazutaka Fukushima, Tadashi Arai1979 Volume 27 Issue 2 Pages 107-116
Published: June 30, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSField desorption mass spectra of peptide antibiotics of various kinds are presented. In each case, a M+ or (M+H) + peak of the antibiotics is obtained. Fragmentations available for an analysis of amino acid sequence occure in straight-chain peptide antibiotics.View full abstractDownload PDF (832K) -
Yoshikazu Hasegawa, Yuji Maruyama, Tsutomu Kashiwagi, Seiichi Inayama1979 Volume 27 Issue 2 Pages 117-122
Published: June 30, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFive steroidal compounds were estimated in two samples, A and B, derived from hydrolysis of rice bran. The present study presents identification and quantitative analysis of these compounds. As a result of gas chromatography and mass spectrometric analysis, they were identified as campesterol, β-sitosterol, 24-methylene-cycloartanol and cyclobranol with their standard compounds, respectively. The ratio of these compounds were determined to be 4.55, 1.00, 7.59 and 1.18 in sample A and 2.44, 1.02, 1.41, 1.00 and 1.95 in sample B by gas chromatography.View full abstractDownload PDF (571K) -
Toshihiro Fujii1979 Volume 27 Issue 2 Pages 123-126
Published: June 30, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe negative ion mass spectrum of perfluorotributylamine was obtained using an electron impact ionization quadrupole mass spectrometer. This compound can be used as a useful mass reference for negative ions over a range from m/e 19 to m/e 633.View full abstractDownload PDF (294K) -
Itsuo Katakuse, Takekiyo Matsuo, Hisashi Matsuda, Yasutsugu Shimonishi ...1979 Volume 27 Issue 2 Pages 127-130
Published: June 30, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (320K) -
H. Wollnik, T. Matsuo1979 Volume 27 Issue 2 Pages 131-134
Published: June 30, 1979
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (375K)
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