Computer Science
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.1233p&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 46, Issue 7, pp.1233-1241
Computer Science
1
Scientific paper
Analyses of forty-two United States humic coals have revealed a striking divergence between chlorophyll diagenesis in coals when compared to the more widely studied marine sediments, shales, asphalts and petroleums. Porphyrins of humic coals have been found to be dominated by the ETIO-series, to lack members above C-32, and, in lower ranked samples ( e.g. Sub-bituminous-B, high volatile C) to exhibit mass spectral envelopes with unique even-carbon number predominances. The weighted average mass, as well as the carbon number maximum ( viz . mode), of these coal porphyrin homologies has been found to decrease as rank increases. The generation of porphyrins of the ETIO-series is suggested as occurring both during early coal formation, including oxidative scission of the isocyclic ring at the phorbide stage, and later during the catagenic alteration of surviving DPEP-series porphyrins. A preliminary study of chlorophyll diagenesis in a South Florida peat partially substantiates this suggestion and has further shown that the coal porphyrins can be derived from bacterial, as well as higher plant, chlorophylls.
Baker Earl W.
Charney L. S.
Louda William J.
Palmer S. E.
No associations
LandOfFree
Tetrapyrrole pigments in United States humic coals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Tetrapyrrole pigments in United States humic coals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tetrapyrrole pigments in United States humic coals will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1023236