G Irem Kaya

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Galanthus L. (Amaryllidaceae) is a genus represented by 14 taxa and one hybrid in Turkey. Galanthus gracilis Celak. is distributed mainly in the western Aegean at higher altitudes [1]. The members of the Amaryllidaceae family have been known for their ornamental value and biologically active alkaloids. For instance, these alkaloids exhibit antiviral [2],(More)
"Hedgehyssop" Gratiola officinalis L. (Scrophulariaceae) is found as an ingredient in homeopathic remedies. Among the active compounds found in G. officinalis, the cucurbitacines constitute a group of triterpenoid substances which are well-known for their bitterness and toxicity. Due to the toxicity of the cucurbitacin's aglycones it becomes necessary to(More)
A new indole alkaloid, galanthindole, was isolated from Galanthus plicatus ssp. byzantinus (Amaryllidaceae), a plant native to northwestern Turkey. Incorporating a non-fused indole ring, galanthindole may represent the prototype of a new subgroup of the Amaryllidaceae alkaloids. Two other bases, (+)-11-hydroxyvittatine and hordenine, are also reported from(More)
The interaction of lycorine (LYC) with calf thymus double stranded DNA (dsDNA) and calf thymus single stranded DNA (ssDNA) was studied electrochemically based on the oxidation signals of guanine and adenine by using differential pulse voltammetry (DPV) at carbon paste electrode (CPE) and pencil graphite electrode (PGE). As a result of the interaction of LYC(More)
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