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    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.
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    Öğe
    Pharmacology of macroalgae alkaloids
    (Springer Berlin Heidelberg, 2013) Kaleağasioğlu, Ferda; Güven, Kasim Cemal; Sezik, Ekrem; Erdugan, Hüseyin; Coban, Burak
    Constituents of marine algae gained importance in the last four decades due to the growing interest in their potential for medicinal use. Till today, 44 alkaloids were isolated from macroalgae; some of which were reported to induce important pharmacological effects. These alkaloids can be classified under four groups as 2-phenylethylamine, indole, halogenated indole, and 2,7-naphthyridine derivatives, and each group displays a relatively distinguished activity profile. Overall, pharmacological effect spectrum of macroalga alkaloids is wide and includes neuromodulation, neurotransmission, growth regulation, cytotoxicity, angiogenesis, antioxidation as well as antibacterial, antifungal, and larvicidal activities. © Springer-Verlag Berlin Heidelberg 2013.
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    Öğe
    Volatile oils from marine macroalgae
    (Springer Berlin Heidelberg, 2013) Güven, Kasim Cemal; Sezik, Ekrem; Kaleağasioğlu, Ferda; Erdugan, Hüseyin; Coban, Burak; Karakaş, Elif
    Volatile oils of algae contain a variety of compounds. The main group, terpenes, contains acyclic: linalool, geraniol, citronellol; monocyclic: limonene, 1-8-cineol, p-cymene; bicyclic: ?- and ?-pinene, cadinene, aromatic eugenol, and isoeugenol. The others are benzaldehyde, phenol, p-cresol, various acids, alcohols, aldehydes, amines, ketones, sulfur containing and halogenated compounds. When volatile oil components of algae and terrestrial plants are compared, the algae were found to be relatively poor. Importantly, halogenated compounds occur only in algae, but not in terrestrial plants. In this chapter, we present briefly but comprehensively the occurrence of various volatile compounds in different classes of algae. © Springer-Verlag Berlin Heidelberg 2013.