Decomposition of the [13CC2H6O]+˙ ion in the mass spectrum of 1-[13C]methylcyclobutanolNo abstract is available for this article.doi:10.1002/oms.1210160510R. C. HeyerM. E. RussellJohn Wiley & Sons, Ltd.Journal of Mass Spectrometry...
(d) Representative broadband mass spectrum of the desired 23 amino acid peptide of histone H4 at a retention time of 82.36 min. (e) Representative ETD product ion spectrum for precursor ion m/z 420.09 with matched fragments marked. Reprinted from Jiang et al. [179] with permissions. Only ...
EI analysis of the trimethylsilyl derivatives provides molecular mass (Mr) information, but the spectrum is dominated by fragment ions of the caffeic acid group; isomers cannot be differentiated using EI. FAB analysis, in both the positive and negative ion detection modes, provides Mr information ...
The latter is of high intensity in the spectrum as the peptide has two additional Lys residues. It is worth mentioning that no peaks of the described product ion cluster were observed when applying CEs that are commonly used for the fragmentation of peptides (see Supplementary Figure S2). ...
The 1H-NMR spectrum of 2 indicated signals for 24 protons, all localized in the aliphatic region: Two of them were due to methyl groups (d 0.85 t, 1.11 s); multiplets of 15 protons (d 2.60 and 1.89ϳ1.36) seemed to be due to an elongated methylene chain, and at d 4.23, an ...
(Figure 2). Based on the MS spectrum and GC retention time, a peak corresponding to 1-butanol was confirmed. The quantity of 1-butanol in TCH was calculated from four concentration levels of 1-butanol calibration standard solutions. The linearity of the method was investigated in water at ...
The acute coronary syndromes encompass a spectrum of unstable coronary artery disease from unstable angina to transmural myocardial infarction. Currently, the reference analytes for differential diagnosis are the circulating cardiac isoforms of troponins I and T. However, their slow rele...
The chromatogram also revealed the intramolecular cyclization and cis- and trans- presence o f a very small amount of unconverted 1. cinnamamide, presumably by nitrogen-carbonyl The predominating product was isolated in fission and hydrogen abstraction from solvent. 48% yield. Its mass spectrum' ...
Asbestos-exposed human mesothelin (HM) and malignant mesothelioma (MM) cells release different HMGB1 isoforms.aRepresentative spectrum of whole protein ESI/MS analysis of HMGB1 in crocidolite asbestos-exposed HM where only nonacetylated HMGB1 was detected.bRepresentative spectrum of whole protein ESI/MS...
when the temperature increases rapidly, the analytes will be eluted out of the column faster, which causes the peak of analytes, which takes similar retention time to overlap each other. It is easy to completely overlap the low-intensity peaks. So, the chromatographic spectrum will only show hi...