Sponsored Links

Commitment Runs Deep. Devon is one of the world's leading independent oil and gas producers.

Responsible Energy. Get the latest Shell Sustainability Report 2007 .

Digital Earth completes another M&A deal

Fugro acquires Geolab Nor AS.


Occurrence of high molecular weight lipids (C80+) in the trilaminar outer cell walls of some freshwater microalgae. A reappraisal of algaenan structure


Organic Geochemistry, issue 7, volume 33





The purified cell walls of mother cells (CWM) were isolated from three strains of trilaminar sheath (TLS)- and algaenan-containing freshwater microalgae Chlorella emersonii, Tetraedron minimum and Scenedesmus communis. The chemical structures of CWM and algaenans were investigated by means of tetramethylammonium hydroxide (TMAH) hydrolysis and tetramethylammonium hydroxide thermochemolysis. The compounds released were characterised by 1H and 13C-NMR, gel permeation chromatography and desorption chemical ionisation mass spectrometry. The results show that the outer cell walls of the microalgae are constituted, at least in part, of linear (poly)esters containing extremely long chain alcohol and acid moieties (up to C 80 ) and that algaenans are mainly composed of extremely long chain (di)carboxylic acids up to C 120 . The present results which are in direct contrast to the previous three-dimensional architecture proposed for algaenans, led us to re-interpret the algaenan structure.

Jul 2002

External Link to the paper