Yoshinao Wada
Yoshinao Wada
The pH Dependence of Product Ion Spectra Obtained from Precursor Ions with the Same Charge Number in ESI of Carbonic Anhydrase 2 [0.03%]
碳酸酐酶2的ESI过程中相同电荷数母离子得到的不同pH值下的产物离子谱图的依赖关系
Yoshiaki Nabuchi,Kenji Hirose,Mitsuo Takayama
Yoshiaki Nabuchi
The effect of solvent conditions, including pH, on product ion spectra obtained from precursor ions produced by electrospray ionization (ESI) was examined. Bovine carbonic anhydrase 2 was used as a model protein and the product ions generat...
Cluster composition distributions of pure ethanol: influence of water and ion-molecule reactions revealed by liquid-ionization tandem mass spectrometry [0.03%]
液离子化串联质谱研究纯乙醇的聚集体分布：水和离子-分子反应的影响
Masahiko Tsuchiya,Haruhiko Fukaya,Yasuo Shida
Masahiko Tsuchiya
Studies of clusters in condensed phase at atmospheric pressure are very important for understanding the properties and structures of liquids. Liquid-ionization (LPI) mass spectrometry is useful to study hydrogen-bonded clusters at the liqui...
Application of High-Resolution MALDI-TOFMS with a Spiral Ion Trajectory for the Structural Characterization of Free Radical Polymerized Methacrylate Ester Copolymers [0.03%]
用于自由基共聚的甲基丙烯酸酯嵌段共聚物结构表征的螺旋回文MALDI-TOF质谱分析方法研究
Hiroaki Sato,Yoko Ishii,Hikaru Momose et al.
Hiroaki Sato et al.
The structural characterization of copolymers by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) remains a challenging task, since their random comonomer distribution creates very complicated mass ...
Mass Spectrometry Imaging and Structural Analysis of Lipids Directly on Tissue Specimens by Using a Spiral Orbit Type Tandem Time-of-Flight Mass Spectrometer, SpiralTOF-TOF [0.03%]
基于螺旋型轨道双飞行时间质谱仪的组织样品直接成像及脂质结构分析
Takaya Satoh,Ayumi Kubo,Shuichi Shimma et al.
Takaya Satoh et al.
In this paper, we report the use of mass spectrometry imaging and structural analysis of lipids directly on a tissue specimen, carried out by means of matrix-assisted laser desorption/ionization tandem time-of-flight mass spectrometry, usin...
Correlations between Chemical Compositions and Retention Times of Methacrylate Random Copolymers Using LC-ESI-MS [0.03%]
甲基丙烯酸酯无规共聚物的化学组成与保留时间的关联性研究（LC-ESI-MS法）
Hirotaka Hisatomi,Yukari Nishimoto,Hideya Kawasaki et al.
Hirotaka Hisatomi et al.
Correlations between chemical compositions and chromatographic retention times (Rt) of methacrylate random copolymers were studied by liquid chromatography electrospray ionization mass spectrometry (LC-ESI-MS). Twenty-six different polymers...
In-Situ U-Pb Dating of Apatite by Hiroshima-SHRIMP: Contributions to Earth and Planetary Science [0.03%]
Hiroshima-SHRIMP磷灰石原位U-Pb定年术及其对地球和行星科学的贡献
Kentaro Terada,Yuji Sano
Kentaro Terada
The Sensitive High Resolution Ion MicroProbe (SHRIMP) is the first ion microprobe dedicated to geological isotopic analyses, especially in-situ analyses related to the geochronology of zircon. Such a sophisticated ion probe, which can attai...
Toshiyuki Mikami,Toshifumi Takao,Kazunori Yanagi et al.
Toshiyuki Mikami et al.
A chemical tag at the peptide N-terminus, in combination with MS, can be useful for quantitative analysis, N-terminal peptide identification, or peptide sequencing. Here we report on the N (α) selective acetylation of a peptide using aceti...
Construction of a newly designed small-size mass spectrometer for helium isotope analysis: toward the continuous monitoring of (3)he/(4)he ratios in natural fluids [0.03%]
一种新型小尺寸质谱仪的研制——自然流体中氦同位素比值的连续监测之路
Ken-Ichi Bajo,Hirochika Sumino,Michisato Toyoda et al.
Ken-Ichi Bajo et al.
The construction of a small-size, magnetic sector, single focusing mass spectrometer (He-MS) for the continuous, on-site monitoring of He isotope ratios ((3)He/(4)He) is described. The instrument is capable of measuring (4)He/(20)Ne ratios ...
Label-free analysis of o-glycosylation site-occupancy based on the signal intensity of glycopeptide/peptide ions [0.03%]
基于糖肽/肽离子信号强度的无标记O-连接糖基化位点 Occupancy分析方法研究
Yoshinao Wada
Yoshinao Wada
Mucin-type O-glycosylation is a major posttranslational modification of proteins. The level of O-glycosylation at a site could be useful in terms of evaluating various disease conditions. To address the feasibility of measuring O-glycosylat...