Computer Science
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.4479t&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 57, Issue 18, pp.4479-4489
Computer Science
Scientific paper
Gas chromatographic-mass spectrometric analyses of Tertiary and recent halite samples using high-temperature gas Chromatographic columns have shown that O-phytanyl-O-sesterterpanylglycerol and bis-O-phytanylglycerol are common constituents in halites deposited in non-alkaline systems. These isopranylglycerol diether distributions are in contrast with those found in carbonates and most sulphates deposited in solar salterns or in sediments of mesohaline lagoons, which contain only the C 20 -C 20 homolog. The investigation of the distributions of these compounds in thirteen species of non-alkaliphilic halobacteria has revealed that bis-O-phytanylglycerol occurs as the single homolog in most cases, namely Halobacterium, Haloferax , and Haloarcula spp., but O-phytanyl-O-sesterterpanylglycerol has been found in one Halococcus species. The presence of this C 20 -C 25 diether in this genus of extremely halophilic archaebacterial cocci expands the limited number of organisms known previously as potential precursors of this isopranylglycerol, alkaliphilic halobacteria, and Methanosarcina spp. and indicates that its widespread occurrence in recent and Tertiary halites is related with contributions from non-alkaliphilic halobacteria.
Grimait Joan O.
Pueyo Juan J.
Rodriguez-Valera Francisco
Teixidor Pilar
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