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Volume 36 (1988)
- Issue 5 Pages 187-
- Issue 4 Pages 169-
- Issue 3 Pages 87-
- Issue 2 Pages 35-
- Issue 1 Pages 1-
Volume 36, Issue 3
Displaying 1-4 of 4 articles from this issue
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REGULAR PAPERS
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Gan Kezheng, Isao Nishi, Hiroshi Fukuzawa1988 Volume 36 Issue 3 Pages 87-98
Published: 1988
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSA method for non-invasive measurement and multidimensional analyses of respiration and circulation was developed by using the respiratory mass spectrometer by combining a C2H2 mixture rebreathing method with a bag in box technique, various respiratory and circulatory factors are simultaneously obtained from continuous gas concentrations and respiratory flow rates. Respiratory and circulatory functions can be evaluated from relevant physiological aspects including ventilation, perfusion, gas exchange, ventilation perfusion ratio and the correlations between them. By applying microcomputer and special algorithms developed, an automatic system for real time measurement was constructed. Results show that the proposed system has the possibility of practical use in physiological research and clinical diagnoses.View full abstractDownload PDF (687K) -
Nobuko Mataga, Tokishi Hayashi, Hiroshi Naruse, Yoshio Iida1988 Volume 36 Issue 3 Pages 99-105
Published: 1988
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSA sensitive method was developed for the determination of deuterated and non-deuterated kynurenine, one of the major metabolites of tryptophan, using gas chromatography/negative ion chemical-ionization mass spectrometry. Kynurenine was prepurified with an AG 50W × 2 cation-exchange column and then converted to pentafluoropropionyl-methyl-derivative. It was isolated and determined by selected ion monitoring (SIM). This method was applied to measurements of deuterated and non-deuterated kynurenine in human plasma after oral administration of L-tryptophan-2, 4, 5, 6, 7-d5.View full abstractDownload PDF (366K) -
Yi-ming Yang, Man-li Dai, Long-ze Lin1988 Volume 36 Issue 3 Pages 107-113
Published: 1988
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSFast atom bombardment mass spectrometry has been shown to be a useful alternative technique to electron impact mass spectrometry for structure analysis of isoquinoline alkaloids. While retaining almost the same fragmentation pattern as that by EI, the present method provides very abundant molecular ion species, which are hardly discernible in EI. Fast atom bombardment mass spectra of dimeric aporphinebenzylisoquinolines, tail-to-tail one diphenyl ether linkaging bisbenzylisoquinolines, benzylisoquinolines and phthalideisoquinoline have been presented.View full abstractDownload PDF (255K) -
Katsutoshi Kamei, Kanako Kitahara, Atsushi Momose, Kenji Matsuura, Hid ...1988 Volume 36 Issue 3 Pages 115-124
Published: 1988
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSLiquid chromatographic influence on changing the solvent system from the non-volatile buffer containing inorganic salts or phosphates to some volatile buffers suitable for the direct coupled liquid chromatography/mass spectrometry was investigated by means of the reversed-phase high-performance liquid chromatography. On a separation of ten methylxanthines including methyluric acids, almost the same chromatograms of the mixture were obtained among all buffers examined. Similar modifications on the solvent system were tried to separate a mixture of nine non-steroidal anti-inflammatory drugs and anthranilic acid. In an application of the modified buffer to the FRIT-FAB liquid chromatography/mass spectrometry, informative negative ion mass spectra of acetyl-coenzyme A and structurally related compounds could be obtained by using diethanolamine-acetic acid buffer. Diethanolamine, its acetate in the buffer, acts effectively as a matrix for the FRIT-FAB liquid chromatography/mass spectrometry.View full abstractDownload PDF (532K)
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