In this study, the gypsum formation in carbonate stone by air pollutants has been investigated. The mineralogical composition (x-ray powder diffraction analysis) and texture (optical microscopy research of thin sections) of samples taken from the unsheltered surfaces of 13 historical buildings of different ages in various parts of Sivas have been examined. The gypsum formation on polluted surfaces has been caused and influenced by the polluted atmosphere of Sivas city, high relative humidity, the age of the buildings and stone characteristics.
Total lipid amount and fatty acid composition were determined and compared for cultivated European sea bass (Dicentrarchus labrax) from Turkey, which were fed with pellet and extruded commercial feed two or three times a day. Fatty acid analyses were carried out by gas chromatography-mass spectrometry. Among total fatty acids, palmitic (16:0), palmitoleic (16:1n-7), oleic (18:1n-9), linoleic (18:2n-6), eicosapentaenoic acid = EPA (20:5n-3) and docosahexaenoic acid = DHA (22:6«-3) were found to be the predominant fatty acids. The fish which received extruded feed (three times a day) had a slightly higher n-3/n-6 ratio of 1.41 compare . . .d to the other feeding types. It was found that the extruded feed given two times a day as fish diet resulted in the highest amounts of EPA, DHA, and total n-3 fatty acids