This technique, which collects mass spectrometric data from the surface of specimens, has previously been applied to a variety of animal fossils to identify the presence of fossil melanosomes, including bird feathers, amphibians, mammals and squid ink.
The comparison of the mass spectrometric data with sequence databases results in the identification of the protein.
Analytical data of these transformation products, e.g., electrochemical potentials, UV/VIS absorbance maxima, and mass spectrometric data, are tabulated.
The chemical structures of the compounds were proved by IR, 1H NMR, 13C-NMR and Mass spectrometric data.
However, neither general methodology for the identification nor extensive databases of metabolites with multistage mass spectrometric data are available at the moment.
The identity and purity was confirmed by analysis of spectroscopic and mass spectrometric data and by comparing the melting point with literature values [20].
Full-scan mass spectrometric data were used to select ions with potential for designating the analytes and their respective isotopically labeled analogs in quantitative analysis protocols.
The provided high resolution mass spectrometric data were interpreted manually using a combination of fragment and neutral loss analysis, literature consultation, manual database searches, deductive logic and experience.
The collaborative NormaNEWS [25] joint activity has already successfully demonstrated the usefulness of the retrospective screening of high-resolution mass spectrometric data in establishing the spatial and temporal occurrences of newly identified compounds of potential emerging concern [26].
Most of the metabolomics data is recorded as unassigned peaks of different intensity on different retention times, masses or mass fragments (mass spectrometric data) or chemical shifts (NMR data).
Second, we re-analyzed a mass spectrometric data set designed to identify proteins regulated by microRNAs.
