Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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COAR Access Rights: search.filters.coarAccessRights.open accessSubject: search.filters.subject.Asteraceae

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  • Article
    Citation - WoS: 19
    Citation - Scopus: 20
    Specialized Metabolites From the Aerial Parts of Centaurea Polyclada Dc.
    (Elsevier Ltd., 2017) Demir, Serdar; Karaalp, Canan; Bedir, Erdal
    The genus Centaurea L. (Asteraceae) is represented by 200 taxa in the flora of Turkey and several Centaurea species are used as herbal remedies against different conditions. Previous phytochemical investigations on this genus generally revealed the isolation of sesquiterpene lactones and flavonoid derivatives. In our continuous search on Centaurea genus, a phytochemical study was performed on Centaurea polyclada DC., an endemic of West Anatolia. Previously undescribed two sesquiterpene-amino acid conjugates, an elemane and an eudesmane derivative were isolated from the aerial parts of Centaurea polyclada, together with eight known compounds; two elemane derivatives, three flavonoids, a lignan, a phenolic glucoside and a phenylpropanoid glucoside. Structural elucidation of the compounds was based on spectroscopic evidence, including 1D and 2D NMR and high-resolution mass spectrometry, chemical degradation results and reference data comparison. Sesquiterpene-amino acid conjugates are representatives of an unusual group of sesquiterpenes, and elemane-amino acid conjugates are herein reported for the first time in nature.
  • Article
    Mineral Compositions of Some Selected Centaurea Species From Turkey
    (Chemical Publishing Co., 2014) Kayalar, Hüsniye; Durmuşkahya, Cenk; Hortooğlu, Zehra Sinem
    Centaurea calolepis Boiss., Centaurea lydia Boiss. and Centaurea polyclada DC. were investigated for major minerals and trace elements by X-ray fluorescence spectrometry. Calcium and potassium were found in maximum concentrations in Centaurea species. The results revealed that the concentrations of iron, manganese and zinc were found to be high in C. calolepis. On the other hand, copper, magnesium and phosphorous were found in higher concentrations in C. polyclada. Mineral composition of Centaurea species, will be descriptive in terms of the traditional use of this species. In addition, C. calolepis, C. lydia and C. polyclada may be utilized in nutraceuticals as potential natural sources of major minerals and trace elements.