Nitrogen in fossil fuels is present in pyrrolic- and pyridinic-functional groups. In contrast, organic nitrogen in living organisms is overwhelmingly found in amino acids in proteins and peptides. Pet
CHN analyses of sediments and rocks sampled during DSDP Leg 75 in the South Atlantic have provided concentrations of organic carbon and atomic C/N ratios of organic matter from...
As a proof of principle, a selected reaction monitoring (SRM) mass spectrometry-based methodology was applied to the simultaneous quantification of dozens of protein biomarkers in caged amphipods (Gam
Comment on sulfur values: The high sulfur values > 5% determined with the LECO instrument are minimum values as shown by re-measurements using an ELTRA-CS 500 instrument (which is better calibrated fo
