Yazar "Gezgin, Tuncay" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • [ X ]
    Öğe
    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.
  • [ X ]
    Öğe
    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.
  • [ X ]
    Öğe
    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.
  • [ X ]
    Öğe
    N-acetyltyramine from Phyllophora crispa (Hudson) P.S. Dixon and N-acetylphenylethylamine from Gelidium crinale (Hare ex Turner) Craillon
    (University of Istanbul, 2009) Percot, Aline; Güven, Kasim Cemal; Aysel, Veysel; Erdu?an, Hüseyin; Gezgin, Tuncay
    In this work N-acetyltyramine and N-acetylphenylethylamine were identified by GC-MS for the first time in a marine algae, Phyllophora crispa and Gelidium crinale respectively. In our earlier work hordenine was found in both algae. Tyramine and phenylethylamine appear as a precursor of hordenine in barley. Similarly to these findings we suggested that the present compounds are also precursor for hordenine in algae.