Fig. 2: Chromatograms and mass spectra acquired during the pyrolysis of a Shewanella frigidimarina bacterial culture indicating the presence of monoglycerides.
From: Intact polar lipids as organic biomarkers of viable extraterrestrial life
A Chromatogram acquired from the pyrolysis-GC-MS of the bacteria in selected ion (SIM) mode. m/z = 239 was selected due to it being the most intense peak in the spectra of the dehydrated monoglyceride. The chromatogram displays a peak with a retention time matching the elution of the dehydrated monoglyceride in the soy lecithin experiment. B Spectrum acquired in an identical experiment using full scan mode, at the retention time of the peak labelled with * in A. C Extracted ion chromatogram (EIC) acquired from the pyrolysis-derivatisation-GC-MS of the bacteria, showing a peak with a retention time matching the elution of the derivatised monoglyceride in previous experiments. D Spectrum acquired at the peak labelled with * in C.
