巻号一覧
20 巻 (1972)
- 4 号 p. 255-
- 3 号 p. 167-
- 2 号 p. 101-
- 1 号 p. 1-
20 巻, 4 号
選択された号の論文の10件中1～10を表示しています
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ITSUO KATAKUSE1972 年 20 巻 4 号 p. 255-279
発行日: 1972/12/28
公開日: 2010/06/28
ジャーナル フリーIn order to determine the atomic masses of the mass-substandards, H, D, 35Cl and37Cl, the ten kinds of doublets involving these nuclides were measured by the digital peak matching method with the half height resolution of 300, 000∼500, 000. These doublet mass differences were as follows:(C2D6-C3)=84, 611.600±0.340, (C2D6-H35Cl)=107, 934.900±0.540, (C3-H35Cl)=23, 321.830±0.630, (C2D6-C3)=84, 611.730±0.411, (C3-H35Cl)=23, 322.328±0.325, (C2D6-H35Cl)=107, 933.422±0.538, (C3H2-H37Cl)=41, 922.176±0.305, (D35Cl-37Cl)=17, 051.816±0.185, (C2D2-C2H4)=3, 096.444±0.127 and(C3H8-C3D4)=6, 192±0.265, μu. Using above doublet mass difference values as input data, the mass-substandards were calculated by least squares treatments. The results were H=7, 825.065±0.030, D=14, 101.930±0.040, 35Cl=-31, 147.21±0.20 and 37Cl=-34, 097.10±0.22μu.Using these results and the previously measured doublets(C2H4-14N2)=25, 152.44±0.19 and(C2H4-C16O)=36, 384.01±0.24μu, mass excess of 16O=-5, 085.75±0.25 and 14N=3, 073.91±0.14μu was obtained.抄録全体を表示PDF形式でダウンロード (1670K) -
TAKAYASU MOCHIZUKI, TATSUO ARIKAWA1972 年 20 巻 4 号 p. 281-286
発行日: 1972/12/28
公開日: 2010/06/28
ジャーナル フリーMeasurements of the transverse emittance of the ion beam at three different characteristic sections of the present developed low energy ion source were carried out to optimize the operation of the ion source.抄録全体を表示PDF形式でダウンロード (1127K) -
NOBUO TAKAOKA1972 年 20 巻 4 号 p. 287-302
発行日: 1972/12/28
公開日: 2011/03/01
ジャーナル フリーA linear correlation in a three-isotopes plot between 130Xe/ 136Xe and mXe/136Xe(m=128, 131, 132 and 134)on the published data, which include the carbonaceous chondrites and the lunar soils, is found. The atmospheric xenon does not fit the correlation. The constancy of the ratio 128Xe/130Xe with the extending ratios 128Xe/136Xe and 130Xe/136Xe for the samples studied excludes a mass fractionation in xenon from the relevant samples. In order to understand the correlation and the deviation of the atmospheric xenon from the correlation, there is proposed a hypothesis that both the meteorite trapped xenon and the solar xenon have been differentiated from a single component of primitive xenon in common in the early solar system by the implication of fission xenon in it, while the terrestrial xenon differentiated from the same primitive xenon by the implication of fission xenon followed by a gross mass fractionation which proceeded as exp[-at √ m].On the hypothesis, the isotopic composition of primitive xenon is tentatively estimated to be: 124/126/128 130/131/132/134/136=(0.018)/(0.016)/0.31(+0.03 ∼-0.01)/0.61(+0.03 ∼-0.01)/2.99(+0.14 ∼-0.07)/3.63(+0.15 ∼-0.08)/1.29(+0.02 ∼-0.01)/=1.00. The fission yields for the fission components implicated are estimated. A striking correlation between fissiogenic 136Xef and 132Xe is found on the basis of the isotopic composition of primitive xenon, which supports the suggestion by Anders and Heymann that a progenitor of fissiogenic xenon might be a superheavy element.抄録全体を表示PDF形式でダウンロード (1504K) -
田中 嗣夫1972 年 20 巻 4 号 p. 303-310
発行日: 1972/12/28
公開日: 2011/03/01
ジャーナル フリーAs one of the reserches on atomic collision problems, the measurements of the ion-electron recom bination cross section are intended. The techniques used are improved crossed-beam method and mass spectrometric one. The construction of the apparatus has been finished. And some preliminary experiments were performed for testing the availability of the apparatus and the efficiency of the neutralized ion detector. In this paper, the characteristics of the apparatus, the experimental difficulties and some results so far obtained are described.抄録全体を表示PDF形式でダウンロード (3733K) -
SATOSHI OKADA, AKIRA MATSUMOTO, TAKAAKI DOHMARU, SETSUO TANIGUCHI, TER ...1972 年 20 巻 4 号 p. 311-319
発行日: 1972/12/28
公開日: 2011/07/05
ジャーナル フリーThe thermal energy ion-molecule reactions in acetaldehyde and methanol have been studied by mass spectrometry using a pulsed ion source. The rate constants of transfer of light hydrogen and deuterium from methyl and formyl groups of acetaldehyde have been separately treated, and those of transfer of light hyd rogen from methyl and formyl groups have been estimated to be 0.98 × 10-9 and 1.97 × 10-9cm3 · molecule-1 · sec-1, respectively. In the methanol system, the indirect isotope effect and the ion repeller voltage dependence on the rate constants for hydrogen transfer reactions are given and compared with the results reported by other workers.抄録全体を表示PDF形式でダウンロード (558K) -
竹下 功1972 年 20 巻 4 号 p. 321-329
発行日: 1972/12/28
公開日: 2010/06/28
ジャーナル フリーA simple method has been developed for digital measurement and recording of mass spectra. The system consists of a peak memory, a maximum detector, a measure command generator, an automatic reset signal generator and a conventional autorange digital voltmeter. It can measure the peak height of mass spectra from 3 mV to 10 V. The precision is within ± 0.5% for the input signal higher than30 mV.抄録全体を表示PDF形式でダウンロード (764K) -
立松 晃, 桜井 寛, 中田 尚男, 後藤 俊夫1972 年 20 巻 4 号 p. 331-338
発行日: 1972/12/28
公開日: 2011/03/01
ジャーナル フリーDoubly charged ion mass spectra of alkylbenzenes were obtained by setting the electro static sectortwice as much voltage as a normal value. These spectra are different from those of singly charged ion spectra. Main fragment ions are shown Table1. Some structural limitations for the appearance of these ions are discussed .抄録全体を表示PDF形式でダウンロード (536K) -
立松 晃, 灘井 種一, 吉住 秀夫, 桜井 寛, 古川 宏, 林 満男1972 年 20 巻 4 号 p. 339-346
発行日: 1972/12/28
公開日: 2011/03/01
ジャーナル フリーIn a previous paper, we reported the availability of mass spectrometry as a useful technique for the identification of drug metabolites. In the present study, the metabolites of 7-hydroxy-4-methylcoumarin in rat were investigated by mass spectrometric technique as shown in Chart 1. A small amount of the administrated urine was evaporated under reduced pressure and the mass spectrum of the residue was recorded(MS-1). From this spectrum, we estimated the presence of various metabolites by observing the shift of mass numbers in high mass region. The remained urine was added with saturated aqueous solution of basic lead acetate and the precipitate was filtrated. After evaporation of the filtrate under reduced pressure various metabolites in the residue were separated by thin-layer chromatography. The mass spectra of extracts of each spot on the thin-layer chromatography were recorded(MS-3). From these spectra, structures of major metabolites were identified by aid of various physical methods(UV, IR, NMR etc.)and of some chemical techniques. Futhermore, the precipitate. was suspended in 50% aqueous MeOH and treated with H2S gas. The filtrate thus obtained was evaporated under reduced pressure and the mass spectrum of the residue was recorded after silylation(MS-4). From this spectrum, we can confirm the presence of various glucuronides.By using these techniques, four metabolites and their glucuronides of the substrate, 7-hydroxy-4-methylcoumarin, were easily identified(Fig. 10).抄録全体を表示PDF形式でダウンロード (647K) -
西下 孝夫, 吉原 政幸, 大島 昌三1972 年 20 巻 4 号 p. 347-355
発行日: 1972/12/28
公開日: 2010/06/28
ジャーナル フリーMass spectra of the trimethylsilyl(TMS)derivatives of straight chain secondary alcohols having carbon numbers 9 and 12 respectively and of steric isomers of methylcyclohexanol and cyclohexanediol have been measured. A specific fragmentation of the TMS derivatives of secondary alcohols is considered to be a-cleavage to TMS ether linkage, and the relationship between two fragment peaks induced from this cleavage and the orientation of functional groups have been discussed. The TMS derivatives of methylcyclohexanol have no evident difference in mass spectra between and trans isomers, but cis and trans-4-methyl isomers give a strong peak intensity at M/e 129 and a very weak one at M/e 143. On the other hand, cis-and trans-isomers of the TMS derivatives cyclohexane-1, 2-diol give quite similar mass spectra, but the mass spectra of those of 1, 3- and 1, 4-diols have some differences in the peak intensities at M/e 81, 147 and 170. The relationship between mass spectra and stereochemical structures has also been discussed.抄録全体を表示PDF形式でダウンロード (604K) -
HIROHIKO EZOE, YOSHIKO ITOH1972 年 20 巻 4 号 p. 357-362
発行日: 1972/12/28
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (4490K)
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