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    Comparison of fatty acid contents of wild and cultured rainbow trout Onchorhynchus mykiss in Turkey
    (Blackwell Publishing, 2007) Aslan, Serap Saglik; Guven, Kasim Cemal; Gezgin, Tuncay; Alpaslan, Mustafa; Tekinay, Adem
    The total lipid content and fatty acid composition were determined in the flesh and skin of wild and cultured rainbow trout in Turkey. The effect of diet content was also investigated on cultured trout. Gas chromatography-mass spectrometry (GC-MS) was used for fatty acid analyses. Total lipid content of skin was higher than flesh in both types and when compared appreciably higher in cultured fish. The predominant fatty acid was palmitic acid (C16:0) in saturated fatty acids and oleic acid (C18:1n-9) in monounsaturated fatty acids. The amount of eicosapentaenoic acid was double in wild and docosahexaenoic acid (DHA) 1.5 times higher in cultured fish flesh. The n-3/n-6 ratio was higher in cultured fish than wild fish. The levels of palmitic, oleic, linoleic (C18:2n-6) and palmitoleic (C16:1n-7) acids were high in skin. The level of EPA was the same in skin of wild fish but 5.5 times higher in cultured fish, whereas the proportion of DHA in skin was lower for wild and 3.5 times higher in cultured fish. Wild fish had a high level of linoleic, arachidonic (C20:4n-6) and linolenic (C18:3n-3) acids. The total amount of n-3 and n-6 polyunsaturated fatty acids was higher in flesh of wild fish than cultured fish, contrary to skin of cultured fish. The data obtained demonstrated that fatty acid composition of cultured fish did not depend on that of feed.
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    Determining the Level of Petroleum Pollution in Dardanelles
    (Marmara Univ, 2007) Ilgar, Rustu; Guven, Kasim Cemal
    Dardanelles is one of the important waterways of the world and our country, which lies at the northwest of Turkey where Asia and Europe meets. This constriction provides the interaction between Aegean and Marmara. For this reason, it is ecologically very important. As everybody knows, corruption of the natural environment not only decreases the life quality, but it also causes economical losses. Doing nothing to prevent pollution may bring about very high costs. So people searched for the answers for this question; What can we do in the sea and coast protection area in Dardanelles? Finally, petroleum levels have been analysed which was done for the first time on that area. For petroleum, PAH (Polly Aromatic Hydrocarbon used in the indication of petroleum) analysis were made with the UVF analysis in the sea water and sediment. With the data collected, conclusion and evaluation have been made.
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    Effects of pellet and extruded feed on fatty acid composition of European sea bass (Dicentrarchus labrax) using HRGC-MS
    (2009) Aslan, Serap Saglik; Çoban, Burak; Tekinay, Adem; Gezgin, Tuncay; Guven, Kasim Cemal
    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 compared 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.
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    EFFECTS OF PELLET AND EXTRUDED FEED ON FATTY ACID COMPOSITION OF EUROPEAN SEA BASS (Dicentrarchus labrax) USING HRGC-MS
    (Parlar Scientific Publications (P S P), 2009) Aslan, Serap Saglik; Coban, Burak; Tekinay, Adem; Gezgin, Tuncay; Guven, Kasim Cemal
    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 (22:6n-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 compared 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.
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    HHCP contamination in marine alga laurencia pyramidalis bory de saint-vincent ex Kützing
    (2013) Guven, Kasim Cemal; Coban, Burak; Oz?kirimli, Sumru; Erdugan, Hüseyin; Sezik, Ekrem
    This paper describes isolation and indentification of HHCP (Galaxolide®) as pollutant in red alga Laurencia pyramidalis Bory de Saint-Vincent ex Kützing (Syn. Laurencia obtusa var. pyramidata Bory ex J. Agardh) collected from Igneada (Black Sea coast) by GC/MS analysis. It was previously found as a pollutant in Danube River which consequently contaminates the Black Sea. It was suggested that this is a contamination of alga because it was not found in the same species collected from Assos (Çanakkale). This is the first record of HHCP contamination in algae. © by PSP.
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    HHCP CONTAMINATION IN MARINE ALGA LAURENCIA PYRAMIDALIS BORY DE SAINT-VINCENT EX KUTZING
    (Parlar Scientific Publications (P S P), 2013) Guven, Kasim Cemal; Coban, Burak; Ozkirimli, Sumru; Erdugan, Huseyin; Sezik, Ekrem
    This paper describes isolation and indentification of HHCP (Galaxolide (R)) as pollutant in red alga Laurencia pyramidalis Bory de Saint-Vincent ex Kutzing (Syn. Laurencia obtusa var. pyramidata Bory ex J. Agardh) collected from Igneada (Black Sea coast) by GC/MS analysis. It was previously found as a pollutant in Danube River which consequently contaminates the Black Sea. It was suggested that this is a contamination of alga because it was not found in the same species collected from Assos (Canakkale). This is the first record of HHCP contamination in algae.
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    Loliolide in marine algae
    (Taylor & Francis Ltd, 2009) Percot, Aline; Yalcin, Ahmet; Aysel, Veysel; Erdugan, Hueseyin; Dural, Berrin; Guven, Kasim Cemal
    Loliolide content was determined in 13 marine algae including red, brown and green algae collected from the Black Sea, the Dardanelles and the Aegean Sea. Identification and quantification were performed by gas chromatography-mass spectrometry. The loliolide content in green alga is 1.76 g g-1, ranges from 0.14 to 4.35 g g-1 in red and from 0.18 to 4.83 g g-1 in brown algae. The results obtained are in the same range as previously reported for algae, as well as terrestrial plants. This article represents the first report of loliolide occurrence in green algae.