Results 361 to 370 of about 955,547 (405)
Some of the next articles are maybe not open access.
[13] Tandem mass spectrometry of oligosaccharides
1989Publisher Summary This chapter focuses on the tandem mass spectrometry of oligosaccharides. Mass spectrometry of oligosaccharides and their derivatives has been revolutionized by soft ionization techniques. The most useful of these techniques thus far is liquid secondary ionization mass spectrometry (LSI-MS), commonly referred to as fast atom ...
openaire +3 more sources
Electrospray tandem mass spectrometry of polyoxoanions
Journal of the Chemical Society, Chemical Communications, 1995A number of polyoxomolybdates and polyoxotungstates are studied by means of electrospray tandem mass spertrometry; in each case, the mass spectrum of a solution of the polyoxoanion shows the polyoxoanion as the base peak with a minimal degree of fragmentation.
Lau, T. C. +3 more
openaire +4 more sources
Tandem mass spectrometry of mirex
Rapid Communications in Mass Spectrometry, 1989AbstractProduct‐ion spectra derived from the major fragment ions of the polychloro‐cyclobutapentalene pesticide, Mirex, under ammonia chemical ionization have indicated that previous conclusions of a nucleophilic gas‐phase reaction with neutral ammonia were incorrect.
Emil G. Siegmund, Thomas Cairns
openaire +2 more sources
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
openaire +3 more sources
Tandem Mass Spectrometry for Sequencing Proanthocyanidins
Analytical Chemistry, 2007Proanthocyanidins (PAs) are a group of bioflavonoids consisting of oligomers based on catechin monomeric units. These polyphenolic compounds are widely distributed in higher plants and are an integral part of the human diet. A sensitive LC-tandem mass spectrometric (LC/ESI-MS(n)) method in the positive ion mode for sequencing these ubiquitous and ...
Hui-Jing Li, Max L. Deinzer
openaire +3 more sources
Mapping PARP-1 auto-ADP-ribosylation sites by liquid chromatography-tandem mass spectrometry.
Journal of Proteome Research, 2013We demonstrate a novel method for the identification of poly(ADP-ribose) polymerase-1 (PARP-1) autopoly(ADP-ribosyl)ation sites that is suited to collision induced dissociation (CID) tandem mass spectrometry.
J. Chapman +3 more
semanticscholar +1 more source
Acylcarnitine Analysis by Tandem Mass Spectrometry
Current Protocols in Human Genetics, 2010AbstractCarnitine plays an essential role in fatty acid metabolism, as well as modulation of intracellular concentrations of free coenzyme A by esterification of acyl residues. Acylcarnitine analysis of various biological fluids is a sensitive method to detect >20 inborn errors of metabolism that result in abnormal accumulation of acylcarnitine ...
Dietrich Matern, Emily H. Smith
openaire +3 more sources
Electrospray Tandem Mass Spectrometry of Nucleotides
Rapid Communications in Mass Spectrometry, 1996The tandem mass spectra (MS/MS) following electrospray ionization of nucleotides (from 2- to 6-mers) have been examined under a range of collision and ionization conditions. In general, abundant peaks due to the free bases and phosphate groups are observed, along with a limited number of sequence ions.
Margaret M. Sheil, Jacqueline Boschenok
openaire +3 more sources
Focused lipidomics by tandem mass spectrometry
Journal of Chromatography B, 2005In this paper we performed focused analyses of phospholipids by using the data of precursor ion scanning and neutral loss scanning of their polar head groups and fatty acyl moieties for the specific search of categorical phospholipids. By using precursor ion scanning or neutral loss scanning of polar head groups in the positive ion mode, more sensitive
Hiroki Nakanishi +9 more
openaire +2 more sources
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
Kevin D. Ballard, Simon J. Gaskell
openaire +2 more sources