巻号一覧
36 巻 (1988)
- 5 号 p. 187-
- 4 号 p. 169-
- 3 号 p. 87-
- 2 号 p. 35-
- 1 号 p. 1-
36 巻, 5 号
選択された号の論文の5件中1～5を表示しています
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総説
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依田 潤1988 年 36 巻 5 号 p. 187-195
発行日: 1988年
公開日: 2007/05/01
ジャーナル フリーIn this paper, the principles of the ion trap and laser cooling, which are used for the high resolution spectroscopy, are described. Experiments on the ion trap and the laser cooling are also introduced.抄録全体を表示PDF形式でダウンロード (462K)
報文
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Hiroshi Nishimura, Hideo Takeshi, Jun Okano1988 年 36 巻 5 号 p. 197-202
発行日: 1988年
公開日: 2007/05/01
ジャーナル フリーIsotopic abundances of germanium were determined by secondary ion mass spectrometry. A pellet of 99.999% pure germanium was used as a sample. It was bombarded by 12 keV oxygen primary ion beam whose diameter and current were 70-100 μm and 1-5×10-7 A on the sample surface. The isotopic ratios obtained are 70Ge/74Ge=0.58303±0.00033, 72Ge/74Ge=0.76341±0.00028, 73Ge/74Ge=0.21458±0.00013 and 76Ge/74Ge=0.20771±0.00011. The isotopic abundances determined are 70Ge: 21.058±0.012, 72Ge: 27.573±0.011, 73Ge: 7.750±0.005, 74Ge: 36.118±0.006, and 76Ge: 7.502±0.004 in percent.抄録全体を表示PDF形式でダウンロード (290K) -
Multiple Compartment 伝達関数法甘 克正, 西 功, 福沢 寛1988 年 36 巻 5 号 p. 203-214
発行日: 1988年
公開日: 2007/05/01
ジャーナル フリーDistribution of ventilation-perfusion ratio (VA/QC distribution) is one of the most important functional parameters of the lung. A new method for noninvasive measurement of VA/QC distribution is described. Based on a multiple compartment model which simulates the lung as an electric RC network, a concept of multiple compartment transfer function (MCTF) is proposed. A system of algebraic equations is derived from MCTF and the VAZQC distribution can be obtained by solving these equations according to the frequency response of the lung which is measured by continuous analysis of respiratory gas during the inspiration of the gas with sinusoidally varied halothane concentration.
Simultaneous and instantaneous analysis of physiological and inert gases is essential in this measurement. By employing an improved multicollector mass spectrometer, such measurement was accomplished with comparatively satisfactory sensitivity and stability. Another technical problem was to produce the air flow containing sinusoidally varied halothane concentration with a wider range of frequency components. It was achieved by using a commercially available flow controller combining with computer-controlled frequency modulation and synthesis technique.
Experimental results of normal subjects and patients with lung diseases gave physiologically reasonable results of VA/QC distributions. It is demonstrated that the method is useful in physiological studies and clinical diagnoses.抄録全体を表示PDF形式でダウンロード (662K) -
Sun Zhuolian, Dong Zhenwen, Cao Zhongmin1988 年 36 巻 5 号 p. 215-220
発行日: 1988年
公開日: 2007/05/01
ジャーナル フリーRearrangements in cyclic and acyclic carbenium ions through hydride and methide shifts in the gas phase were investigated by MS/MS and ion neutralization/radical trapping/CAD techniques. Results indicate that: (i) there is no hydride shift on a saturated cyclohexane ring; (ii) when there is a double bond on the ring, hydride shift will take place, resulting in the formation of a more stable allylic type cation; (iii) in an acyclic hydrocarbon carbenium ion of neopentyl type, methide shift of a Wagner-Meerwein rearrangement takes place just as in solution.抄録全体を表示PDF形式でダウンロード (249K) -
藤原 英俊, 井上 正久, 加藤 旭1988 年 36 巻 5 号 p. 221-228
発行日: 1988年
公開日: 2007/05/01
ジャーナル フリーThe fragmentations of 1-azabicyclo [3.3.1]nonan-4-ols in electron ionization are discussed. The mass spectra of these compounds containing a hydroxyl and an alkyl groups at the 4 position revealed characteristic peaks at [M-17]+, m/z 182, m/z 168, m/z 154, m/z 140, m/z 112, m/z 97, m/z 96, m/z 84, m/z 82, m/z 70, and m/z 69. The compositions of the peaks were determined by a high resolution mass spectrometry. The fragmentation mechanisms for giving these peaks were based on observations of the corresponding to metastable peaks. In particular, the compounds contaning an alkyl substituent produce characteristic ions at m/z 182, m/z 168, and m/z 154 which resulted from loss of part of the alkyl group from the molecular ion.抄録全体を表示PDF形式でダウンロード (304K)
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