著者

伊佐 公男

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.68, no.6, pp.114-115, 2020-12-01 (Released:2020-12-15)

著者

早川 滋雄

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.68, no.6, pp.110-113, 2020-12-01 (Released:2020-12-15)

著者

内藤 康秀 吉野 健一

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.54, no.5, pp.218, 2006 (Released:2006-10-03)

被引用文献数

4 4

著者

吉野 健一

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.55, no.4, pp.298-309, 2007 (Released:2007-08-15)

参考文献数

7

被引用文献数

5 5

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The term “mass spectrometry” is usually abbreviated as “MS.” It is confusing that “MS” is also used as an abbreviation for “mass spectrometer,” “mass spectroscopy,” “mass spectrograph,” “mass spectrum (spectra),” and “mass separation.” “Masu” in Japanese is an ambiguous word and originates from “mass” in English or “Mass” in German. In addition to the meaning of mass, however, “masu” is used as an abbreviation for “mass spectrometry,” “mass spectrometer,” “unified atomic mass unit,” and “a quantity of m/z= 1” by Japanese mass spectrometrists. Because of the ambiguity in the usage of “MS” and “masu,” some inappropriate terms, such as “peptide MS fingerprinting” for “peptide mass fingerprinting” and “TOF-mass” for “time-of-flight mass spectrometer,” were used by Japanese mass spectrometrists.

著者

藤巻 奨 古屋 寛子 神原 静香 平岡 賢三

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.52, no.3, pp.149-153, 2004 (Released:2005-10-28)

参考文献数

13

被引用文献数

2 3

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A direct gas introduction type atmospheric pressure Penning ionization source for on-site analysis of environmental organic pollutants was developed. The long-lived metastable argon atoms Ar* (3P2 and 3P0) were utilized for Penning ionization. As the excitation energies of Ar* are 11.5 eV (3P2) and 11.8 eV (3P0), the major components of air such as N2, O2, CO2, CO, and H2O are not ionized with Ar* but most of the organic compounds can be ionized. Atmospheric pressure Penning ionization mass spectra of all samples studied in our experiment showed abundant molecular-related ions (M+, [M+H]+, and [M-H]+) as base peaks. In the mass spectra of sample gases (M) mixed with methanol, intense ion [M+CH3]+ was observed in addition to [M+H]+ and [2M+H]+. The appearance of [M+CH3]+ is due to the occurrence of the methyl cation transfer reaction, CH3OH2++M→CH3+M+H2O.

著者

兼廣 春之

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.47, no.6, pp.319-321, 1999 (Released:2007-10-16)

被引用文献数

1 1

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The distribution and abundance of plastic litter, especially resin pellets, were investigated. Resin pellets are widespread in the coastal waters and beaches of Japan. Such pellets that are the raw materials of plastic products are important marine pollutants for many species of marine life such as ingestion by seabirds and fishes. In this report, organic pollutants in resin pellets collected from beaches and coastal waters were analyzed. NP (nonylphenol), PCB (polychlorinated biphenyls), and DDE (dichlorodiphenyldichloroethylene) were identified by GC/MS measurement. Their concentrations in 1 g of pellet sample (polypropylene and polyethylene) were as follows: NP (130-25,000 ng), PCB (5-120 ng), and DDE (0.2-3.1 ng). GC/MS analysis of resin pellets suggests that these pollutants were derived from the ambient seawater.

著者

横田 勝一郎

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.67, no.3, pp.93-95, 2019-06-15 (Released:2019-06-15)

参考文献数

43

著者

河井 洋輔

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.67, no.3, pp.96-99, 2019-06-15 (Released:2019-06-15)

参考文献数

12

著者

青木 順

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.67, no.3, pp.100-102, 2019-06-15 (Released:2019-06-15)

参考文献数

8

著者

馬上 謙一

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.64, no.5, pp.219-221, 2016-10-01 (Released:2016-10-15)

参考文献数

6

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北海道大学大学院理学研究院地球惑星科学部門地球惑星システム科学分野地球化学研究グループでは,太陽系の起源と進化の解明を目指しています.そのため,光学顕微鏡,電子顕微鏡,X線分光法,質量分析法などの手法を駆使して,地球内外の物質を正確に分析し,解析しています.この結果,全く新しい惑星や太陽系の起源や生い立ちが詳しくわかってきました.また,地球内外物質からこれまで読み取られていなかった全く新しい情報を獲得するため,物質を解析する新しい方法(分析法,解析装置,合成装置)の設計・開発も同時に行っています.また,これら一連の研究の中に,現在まで認知されていない自然法則や現象が潜んでいて,それを発見できれば一層楽しいと考えています.現在筆者が使用している質量分析装置は非常に小さな領域(μmからnmスケール)の希ガス同位体を測定するためのスパッタ中性粒子質量分析装置(Sputtered Neutral Mass Spectrometer; SNMS)です.この装置の開発の経緯やどのような分析ができるのかを紹介させていただきます.

著者

島 正子

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.62, no.6, pp.77-85, 2014-12-01 (Released:2014-12-15)

参考文献数

23

被引用文献数

1

著者

石黒 正路

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.47, no.3, pp.135-139, 1999 (Released:2007-10-16)

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Computational methods for drug design and its application for structure-based drug design using crystallographic data and NMR solution structural data were briefly described in view of interaction of ligands with or without structures of the target receptors. Analysis of the hydrolytic mechanism of β-lactamases whose 3D stuctures has been known led to understanding a specific recognition of β-lactam antibiotics and to design of a new candidate for anti-MRSA antibiotics. Conformational analysis of peptide derivatives whose receptor structures have not known is the other example for design of new skeletons of nonpeptide compounds. Receptor-bound structure analysis of antagonist or agonist peptides suggested different conformations of the peptides. This may be due to a different receptor structure as a consequence of a large structural change of receptors upon binding of agonists.

著者

向坂 真一 寺本 華奈江 小池 英樹

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

pp.1202230021, (Released:2012-02-27)

参考文献数

18

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Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) is widely used for analysis of not only biological materials but also synthetic polymers. A mass spectrum obtained by MALDI-MS was found to have peaks at equal intervals on the m/z axis. The chemical structure of many types of biological compounds contain repeating units that have exactly the same elemental composition. If these repeated peaks could be identified based on the m/z interval value, such analyses could be optimized even further from the point of view of chemical structure. In this study, we describe a system for visualizing such data that has the capability of analyzing the repeated peaks on the m/z axis. The system, mzRepeat, was developed and evaluated by applying the mass spectrum of polyethylene glycol and mycolic acid, which was obtained using a JMS-S3000 Spiral-TOFMS system. Because mzRepeat can systematically show a mass spectrum that includes different numbers of repeating units, it has the potential for use in anlalyzing these types of molecules.

著者

能田 成 村崎 充弘 巽 好幸

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.38, no.3, pp.125-131, 1990 (Released:2007-05-01)

被引用文献数

1 1

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Isotopic compositions of Sr and Nd were determined for the volcanic rocks from the Izu Islands Arc. The volcanic rocks from the volcanic front zone show variable Nd isotopes ranging from 0.513088 to 0.513125 of 143Nd/144Nd with an average εNd of 9.0±0.3, and 87Sr/86Sr from 0.70318 to 0.70355 with an average εSr of -16.1±0.7. The back arc side volcanics show slightly lower Nd and Sr isotopic ratios as 143Nd/144Nd from 0.512994 to 0.513066 with an average εNd of 7.8±0.4 and 87Sr/86Sr form 0.70299 to 0.70325 with average εSr of -19.9±0.4. Across arc isotopic variation of Sr and Nd from the volcanic front to the back-arc side is attributed to difference in the degree that the magmas of the subduction zones are generated by the addition of the fluid which is extracted from the hydrous minerals in the down-going slab. Magmas in the volcanic front are much more affected by the addition of the considerable amount of the fluid than the back-arc side magmas and altered Sr and Nd isotopic compositions from their original values of the mantle wedge. The role of the fluid from the down-going slab for magma generation is isotopically assessed in the intra-oceanic Izu arc, and the Nd and Sr isotopic compositions of the fluid extracted from the down-going slab is equivalent with those of the altered MORB.

著者

吉野 健一

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.56, no.6, pp.269-274, 2008-12-01 (Released:2008-12-15)

参考文献数

7

被引用文献数

1 1

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The unified atomic mass unit (unit symbol: u) is a non-SI unit of mass, defined as one-twelfth the mass of a single 12C atom in its ground state. [SI: Le Système International d'Unités; The International System of Units] This definition was agreed upon by both the International Union of Pure and Applied Physics (IUPAP) and the International Union of Pure and Applied Chemistry (IUPAC) in the early 1960s to resolve a longstanding difference between two scales of the atomic mass unit. The term “atomic mass unit” (unit symbol: amu) has been used as a unit of mass defined as one-sixteenth the mass of a single atom 16O [m(16O)=16 amu] in physics and as one-sixteenth the isotope-averaged atomic mass (equivalent to the atomic weight) of oxygen [Ar(O)=16 amu] in chemistry.The unit dalton (unit symbol: Da) is also a non-SI unit of mass defined as “1 Da=1 u,” and is accepted as a unit for use by the SI in the 8th edition of the SI brochure (2006). Therefore, both the unified atomic mass unit and dalton are authorized units for mass of ions and molecules. It is a common mistake to use the deprecated term “atomic mass unit” and the deprecated unit symbol “amu” for the unit of mass defined as one-twelfth the mass of single atom 12C. The unit symbol “mmu,” meaning a millimass unit, is also an appropriate unit in SI. Instead of “mmu,” “mDa” or and “10-3 u” should be used.