Sterol and lipid composition of three Adriatic Sea sponges.

The sterol and fatty acid composition of three Adriatic Sea sponges (Geodia cydonium and two unidentified Tedania sp.), collected at the same time and same place, was established. Twenty-four sterols and forty fatty acids were identified.

Lipids and sterols in Musca domestica L. (Diptera, Muscidae): changes after treatment with sucrose and lead.

Total lipid, fatty acid and sterol composition of larvae and adults of Musca domestica was investigated before and after feeding on sucrose syrup or on the same syrup containing 1% lead nitrate. The effects of sucrose and of lead ions were found to be different. In larvae sucrose diet inhibited the fatty acid elongation and stimulated the first stages of their unsaturation.

Chemical composition of the lipophylic extract from the tunicate Botryllus schlosseri.

Eighteen sterols were identified in Botryllus schlosseri, stanols being the main sterols. The sterol composition is in agreement with our recent paper on taxonomic separation of tunicates into three groups. Again we found in invertebrates of the Black Sea sterols with a (22Z)-double bond.

An unusual fatty acid composition for a fresh-water mussel, Unio tumidus, from Bulgaria.

A combination of hplc in the silver ion mode and gc-ms of picolinyl ester derivatives was used to identify the fatty acids in a fresh-water mussel, Unio tumidus, from the Danube in Bulgaria. A number of novel fatty acids were found, including 14-methylpentadec-6-enoic and 17-methyloctadec-8-enoic acids. Eicos-7-enoic acid was a major component.