Results 261 to 270 of about 418,182 (306)
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Tandem mass spectrometry of amidated peptides
Journal of Mass Spectrometry, 2006AbstractThe behavior of C‐terminal amidated and carboxylated peptides upon low‐energy collision‐induced dissociation (CID) was investigated. Two sets of 76 sequences of variable amino acid compositions and lengths were synthesized as model compounds.
Mouls, Laetitia +4 more
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Tandem mass spectrometry of synthetic polymers
Journal of Mass Spectrometry, 2009AbstractThe detailed characterization of macromolecules plays an important role for synthetic chemists to define and specify the structure and properties of the successfully synthesized polymers. The search for new characterization techniques for polymers is essential for the continuation of the development of improved synthesis methods.
Crecelius, A.C. +2 more
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Peptide quantification by tandem mass spectrometry
Mass Spectrometry Reviews, 1996This manuscript reviews the literature on the mass spectrometry (MS) and tandem mass spectrometry (MS/MS) quantification of biologically important peptides that have been extracted from tissues. The most important aspect of this quantification process is the use of MS/MS to link the protonated molecule ion, (M + H)(+) , of the peptide with one or more ...
X, Zhu, D M, Desiderio
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Analytical Biochemistry, 2001
Tetrodotoxin (TTX), a powerful sodium channel blocker, usually exists as a mixture of its analogs (TTXs) in natural sources. Due to the structural variation, some analogs are difficult to detect using the postcolumn liquid chromatography-fluorescent detection (LC-FLD) system.
Y, Shoji +3 more
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Tetrodotoxin (TTX), a powerful sodium channel blocker, usually exists as a mixture of its analogs (TTXs) in natural sources. Due to the structural variation, some analogs are difficult to detect using the postcolumn liquid chromatography-fluorescent detection (LC-FLD) system.
Y, Shoji +3 more
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Electrospray tandem mass spectrometry of epipolythiodioxopiperazines
Journal of Mass Spectrometry, 2007AbstractLow‐energy collision‐induced electrospray ionization tandem mass spectrometry ESI‐CID‐MS/MS (in the positive ion mode) was used for the structural characterization of a series of five representative epioplythiodioxopipreazines: dethiotetra(methylthio)chemotin, chaetocochins A, B and C, and chemotin isolated from the fungus Chaetomium cochliodes.
Zhi-Jun, Wu +5 more
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Tandem Ionization Mass Spectrometry of Biomolecules
European Journal of Mass Spectrometry, 2000The novel mass spectrometric technique tandem ionization mass spectrometry (TIMS) employs irradiation of gas-phase even-electron molecular ions of both polarities with >10 eV electrons. This leads to the production of radical molecular cations and anions of large biomolecules.
Zubarev, R.A. +2 more
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2010
Electron ionization mass spectra show a wealth of fragment ion peaks allowing to retrieve structural information, often though at the expense of abundance of the molecular ion. For decades, EI has served as the one and only ionization method of organic mass spectrometry.
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Electron ionization mass spectra show a wealth of fragment ion peaks allowing to retrieve structural information, often though at the expense of abundance of the molecular ion. For decades, EI has served as the one and only ionization method of organic mass spectrometry.
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Phospholipid profiling by tandem mass spectrometry
Journal of Chromatography B, 2009This review discusses how to analyze glycerophospholipids from simple lipid extracts without preliminary chromatographic separation. The analytical method emphasized in the review is electrospray ionization with tandem mass spectrometry.
Zheng, Cui, Michael J, Thomas
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Hybrid Tandem Mass Spectrometry
1992The development of hybrid sector/quadrupole instruments for tandem mass spectrometry is described. The operational modes of these instruments are illustrated by MS/MS and MS/MS/MS analyses of peptides, xenobiotic metabolites and other compounds of biological importance.The versatility of operation (with respect to scan modes and the conditions utilized
Simon J. Gaskell, Kevin D. Ballard
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Electrospray tandem mass spectrometry of lexitropsins
Rapid Communications in Mass Spectrometry, 2001Abstract Several compounds, representative of the class of lexitropsins, were analyzed by electrospray tandem mass spectrometry. The study of the fragmentations of the protonated molecular species ([M + H] + ) and of selected fragment ions allowed proposals for the main ...
M R, Domingues +4 more
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