巻号一覧
57 巻 (2009)
- 6 号 p. 371-
- 5 号 p. 331-
- 4 号 p. 241-
- 3 号 p. 117-
- 2 号 p. 45-
- 1 号 p. 1-
57 巻, 2 号
選択された号の論文の14件中1～14を表示しています
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追悼
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中田 尚男2009 年 57 巻 2 号 p. 45-47
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーPDF形式でダウンロード (1772K) -
土屋 正彦2009 年 57 巻 2 号 p. 48-51
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーPDF形式でダウンロード (2881K) -
上野 民夫2009 年 57 巻 2 号 p. 52-54
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーPDF形式でダウンロード (347K) -
橋本 豊2009 年 57 巻 2 号 p. 55
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーPDF形式でダウンロード (138K) -
原田 健一2009 年 57 巻 2 号 p. 56-57
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーPDF形式でダウンロード (722K) -
Ian A. BLAIR2009 年 57 巻 2 号 p. 58-59
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーPDF形式でダウンロード (626K)
一般論文
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—体表炭化水素組成比の季節変動—石井 啓介, 浅原 麻希子, 高山 光男2009 年 57 巻 2 号 p. 61-70
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーChange in cuticular hydrocarbons (CHCs) and cuticular hydrocarbons profile (CHP) of the Formica japonica ant collected over a three-year period comprising 2006 (May to October), 2007 (May to October), and 2008 (March to October) were examined by gas chromatography/mass spectrometry (GC/MS) and a principal component analysis method. It was found that cyclic changes in CHPs for n-monoalkenes and branched monomethyl alkanes occur every year. This indicates that the observed tendencies include n-monoalkenes undergoing a relative increase from March or May to June, and a decrease from July to October, whereas branched monomethyl alkanes undergoing a relative decrease during March or May to June, and increase during July to October.抄録全体を表示PDF形式でダウンロード (1906K) -
Yuriko NOZAWA, Ken-ichi HARADA, Akemi RYODA, Takuya KUMAMOTO, Waka NAK ...2009 年 57 巻 2 号 p. 71-74
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーAdvanced Marfey's method was successfully applied to the optical resolution of 1,2-diaminoethane compounds. The elution behavior of 1,2-diphenylethylene-1,2-diamine and 1,2-bis(2-methylphenyl)ethylene-1,2-diamine derivatized with L- and D-FDLA was carefully investigated and the following regularity was found: 1) The (S,S)-isomers are eluted prior to the (R,R)-isomer; 2) The (R,R)- and meso-isomers are closely eluted; 3) There is no difference between the retention time of both the L- and D-derivatives of the meso-isomer; 4) This regularity is fundamentally consistent with that of diamino acids such as diaminopimelic acid and diaminosuccinic acid. Finally, it was confirmed that this method along with the DL-FDLA method could be applicable for the determination of the absolute configuration of 1,2-diaminoethane compounds because the method can definitely determine it by the elution order.抄録全体を表示PDF形式でダウンロード (166K) -
Kouwa YAMASHITA, Takanori KAWAHATA, Madoka TAKAHASHI, Mitsuteru NUMAZA ...2009 年 57 巻 2 号 p. 75-80
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーA simultaneous method for quantification of four catechol estrogens, namely, 2-hydroxyestrone, 2-hydroxyestradiol, 4-hydroxyestrone, and 4-hydroxyestradiol by liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) was developed in a positive mode for analyzing a simple picolinyl derivatization. Reaction of these estrogens with picolinyl derivatization reagent resulted in the formation of di- or tri-picolinyl derivatives, and the derivatives exhibited single charged protonated molecules as base peaks in a positive mode in electrospray ionization/mass spectrometry (ESI-MS). Picolinyl derivatives of these catechol estrogens provided approximately 10 times greater ESI responses in LC-ESI-MS/MS (selected reaction monitoring) compared with those of underivatized molecules in a negative mode. The use of picolinyl derivatizatives, solid-phase extraction, and a 13C-labeled internal standard helped us in determining these catechol estrogens whose quantification limit was 20 pg for every sample. The present method was applied for quantifying these catechol estrogens in a biological sample.抄録全体を表示PDF形式でダウンロード (323K) -
Daiki ASAKAWA, Yutaka HASHIMOTO, Kenzo HIRAOKA2009 年 57 巻 2 号 p. 81-87
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーThe dynamic ranges for quantitative analyses of etoposides using a desorption/ionization technique, electrospray droplet impact, and matrix-assisted laser desorption/ionization were investigated. Etoposide and ethyl-etoposide were used for analyte and internal standard, respectively. The calibration curves show a proportional relationship in the range of ∼4 orders of magnitude, and the coefficients of determination (R2) well exceed 0.9.抄録全体を表示PDF形式でダウンロード (522K) -
Issei DOI, Masaki KUSE, Yosuke NAKASHIMA, Naoki TANI, Minoru ISOBE2009 年 57 巻 2 号 p. 89-95
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーIn general, it is difficult to distinguish between sulfate and phosphate groups in natural products, because these groups are found only in trace amounts in natural products. We have devised a hydrogen/deuterium (H/D) exchange method using the liquid chromatography mass spectrometry technique for establishing a general methodology to distinguish between sulfated and phosphorylated compounds. Sulfate- or phosphate-containing compounds were differentiated by the H/D exchange method based on the number of exchangeable hydrogen in deuterated sulfate (-SO3D) and phosphate (-PO3D2), respectively. In this paper, we describe an application of this method to a natural product and in particular to Watasenia oxyluciferin that is found in the firefly squids (Hotaru-ika in Japanese) for the purpose of identifying coelenteramide disulfate.抄録全体を表示PDF形式でダウンロード (842K) -
Yoko NUNOME, Kozo MATSUMOTO, Kuniyuki KITAGAWA2009 年 57 巻 2 号 p. 97-101
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーLithium (Li) ion attachment mass spectrometry (IAMS) is a highly sensitive method for detecting volatile organic compounds (VOCs) without fragmentation in real-time. We have therefore developed a novel IAMS system for direct determination of trace amounts of VOCs by modifying the sampling cone interface. This technique was successfully applied to in situ analysis of human breath. It was shown that the concentrations of acetone in 7 healthy subjects ranged from 0 (not detectable) to 28.5 ppbv (parts per billion by volume) after a 15-hour overnight fast. The detection limit (3σ) is 0.55 ppbv for acetone and the relative standard deviation (RSD) is less than 9.7%. These results demonstrate that the newly developed IAMS system provides simple, rapid, and sensitive measurements of trace amounts of acetone in human breath, and that the system is promising for early diagnosis of diabetes.抄録全体を表示PDF形式でダウンロード (344K)
ノート
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香川 修司, 吉岡 強2009 年 57 巻 2 号 p. 103-107
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーPerfluoroalkanedicarboxylic acids are used as components in synthetic polymers. In this paper, we describe the application of copper(II) sulfide (CuS) particles as matrices for the chemical ionization of perfluoroalkanedicarboxylic acids in surface-assisted laser desorption/ionization mass spectrometry (SALDI-MS). Because Cu(II) is reduced to Cu(I) by laser irradiation, CuS is an effective matrix for chemical ionization when using a nitrogen laser. After preparation of CuS particles by a shaker, mixtures of matrices and analytes were spotted on a laser desorption/ionization (LDI)-plate and measured using a 337-nm nitrogen laser. Using this approach, we succeeded in producing “chelate” copper(I) adducts of perfluoroalkanedicarboxylic acid. Moreover, we found an important relationship between the length of the perfluoroalkane chain and chemical ionization efficiency.抄録全体を表示PDF形式でダウンロード (559K)
技術報告
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芳本 有史, 元木 翔一, 森脇 悠介, 川崎 英也, 荒川 隆一2009 年 57 巻 2 号 p. 109-115
発行日: 2009/04/01
公開日: 2009/04/15
ジャーナル フリーHigh-performance liquid chromatography/mass spectrometry (LC/MS) is the most useful tool for qualitative and quantitative chemical analysis in the life sciences. However, sample preparation and LC separation demand an extraordinary amount of time and effort. Desorption electrospray ionization (DESI) and direct analysis in real time (DART) techniques that obtain mass spectra of samples without difficulty have been developed in recent years. We connected a home-built DESI ion source to an existing mass spectrometer and examined its performance. In this paper, we report the application of DESI to thin-layer chromatography (TLC)/DESI-MS in rapid analysis of medicines in serum and concentrated analysis with a solid-phase extraction disk.抄録全体を表示PDF形式でダウンロード (1113K)
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