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    Fatty acid composition in larva, pupa, adult and prey of mud-dauber wasp, sceliphron destillatorium (Hymenoptera: Sphecidae)
    (Hacettepe University, 2017) Gülmez, Yaşar; Elmastaş, Mahfuz; Kayır, Ömer; Can, İlyas
    Fatty acid composition of larvae, pupae, and adults of the mud-dauber wasp, Sceliphron destillatorium Illiger 1807, as well as spiders obtained from its nests was investigated for the first time. All samples were obtained from mud nests of the wasp collected from the field. Adults of this insect feed on nectar of flowers but their larvae feed on spiders. Totally 15 fatty acids were identified and quantified by GC-FID in analyzed samples. The highest of all fatty acids is oleic acid which was found as: 43.87%, 42.43%, 48.69%, and 43.88% in larvae, pupae, adult, and the spiders respectively. Fatty acid compositions in larvae, pupae, and spiders were found close to each other. Alpha linolenic acid was determined in larva, pupa, and spider but not in adults, so it seems to be essential fatty acid for this wasp species. The data obtained are usable to reveal the relationship between fatty acid composition and nutrition or physiological events in insects.
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    Quantification of flavonoids isolated from Mentha spicata in selected clones of Turkish mint landraces
    (TÜBİTAK, 2018) Erenler, Ramazan; Telci, İsa; Elmastaş, Mahfuz; Akşit, Hüseyin; Gül, Fatih; Tüfekçi, Ali Rıza; Demirtaş, İbrahim; Kayır, Ömer
    Mint has been used extensively in traditional medicines, spices, and herbal teas throughout the world. Isolation of flavonoids from Mentha spicata and quantification of these compounds in selected clones of Turkish mints landraces were achieved. M. spicata was dried in shade and then boiled in water. After filtration, the aqueous extract was partitioned with ethyl acetate. The solvent was removed under reduced pressure to yield the extract, subjected to silica gel column chromatography to isolate 5-demethyl sinensetin (1), hesperidin (2), didymin (3), and linarin (4), the structures of which were elucidated by 1D NMR, 2D NMR, and LC-TOF/MS. The isolated compounds were employed as standard flavonoids to determine the quantitative variations in cultivated Turkish mint landraces belonging to Mentha × piperita L., M. spicata L., and M. × villosonervata Opiz by HPLC. The quantities of hesperidin (2), didymin (3), and linarin (4) in M. spicata were found as 11.83, 3.85, and 42.21 mg/g dried plant weight (DW), respectively, while that of 5-demethyl sinensetin (1) in M. villosonervata was 2.9 mg/g DW. Consisting of pharmaceutically valuable compounds, M. spicata and cultivated Turkish mint landraces could be a source of 5-demethyl sinensetin (1), hesperidin (2), didymin (3), and linarin (4). © TÜBİTAK.