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    A detailed biological and chemical investigation of 16 Achillea species’ essential oilsvia chemometric approach
    (Wiley-Blackwell, 2020-01-30) Yener, İsmail; Yılmaz, Mustafa Abdullah; Tokul Ölmez, Özge; Akdeniz, Mehmet; Tekin, Fetullah; Haşimi, Nesrin; Alkan, Mehmet Hüseyin; Öztürk, Mehmet; Ertaş, Abdulselam
    Representatives of the Achillea genus are widely used as foods or nutraceuticals. Considering the increasing demand for herbal dietary supplements with health promoting effects, the objective of this research was to evaluate the chemical composition and biological activities of the essential oils obtained from sixteen Achillea species ( A. biebersteinii, A. wilhelmsii subsp. wilhelmsii, A.aleppica subsp. zederbaveri, A. vermicularis, A. monocephala, A. nobilis, A. goniocephala , A. sintenisii , A. coarctata, A. kotschyi subsp. kotschyi, A. millefolium subsp. millefolium, A. lycaonica, A. spinulifolia, A. teretifolia, A. setacea, and A. schischkinii ). Anticholinesterase, antiurease, antityrosinase enzymes inhibition, antioxidant, antimicrobial, toxic and cytotoxic activities of obtained essential oils were investigated. DPPH activities were found to be very low in all studied samples, while ABTS and CUPRAC antioxidant activities were found to be moderate. In addition, all samples were found to have moderate anticholinesterase and antimicrobial effects. It has been determined that the studied species have low cytotoxicity and high toxicity. Besides, chemical composition of the essential oils were determined by GC-MS and the results were chemometrically analyzed. The chemometric analyses of Achillea species collected from 9 different regions were accomplished by principal component analysis (PCA) and hierarchical cluster analysis (HCA) techniques. According to the PCA analysis, A. nobilis subsp. neilreichii was found to be different from all studied species in terms of essential oil composition. The major components found in these species were piperitone, camphor, α-terpinene, eucalyptol, artemisia-ketone, endo-borneol, β-eudesmol and verbenol. The fact that, camphor being toxic and found in majority of the studied species, stands out as a remarkable result.
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    A detailed chemical and biological investigation of twelve allium species from Eastern Anatolia with chemometric studies
    (Wiley-Blackwell, 2020-11-14) İzol, Ebubekir; Temel, Hamdi; Yılmaz, Mustafa Abdullah; Yener, İsmail; Tokul Ölmez, Özge; Kaplaner, Erhan; Fırat, Mehmet; Haşimi, Nesrin; Öztürk, Mehmet; Ertaş, Abdulselam
    Allium species are widely consumed as food all over the world. The phenolic profile of ethanol extracts of aerial parts and roots of 12 Allium species, collected from five different Eastern Anatolia regions, were studied using LC-MS/MS. In vitro antioxidant, anticholinesterase, cytotoxic and antimicrobial activities were also tested. The multivariate analyses were performed using principal component and hierarchical cluster analyses. Seventeen of 27 standard compounds were detected in all Allium species. The major components were mainly identified as quinic acid, malic acid, vanillin, and p-coumaric acid. The aerial parts possessed better antioxidant activity than roots. Aerial parts of A. atroviolaceum, A. chrysantherum, A. kharputense, and A. shirnakiense exhibited high cytotoxic activity against DLD-1 colon cancer cell lines (IC50 12.5 μg/mL). A. shatakiense and A. vineale demonstrated good antimicrobial activity against S. aureus and E. coli (MIC 75 μg/mL). According to chemometric analysis, differences were detected between aerial parts and the roots. The aerial parts of A. atroviolaceum, A. chrysantherum, A. kharputense, and A. shirnakiense could be potent in the pharmaceutical industry while A. shatakiense and A. vineale in the food industry after further investigations.
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    Rezene ve adaçayı uçucu yağlarının antimikrobiyal aktivitesi üzerine bir araştırma
    (Batman Üniversitesi, 2015) Haşimi, Nesrin; Kızıl, Süleyman; Tolan, Veysel
    Son zamanlarda araştırmacılar, mikroorganizmaların antibiyotiklere karşı geliştirdiği direnç sebebiyle bitki türlerinden izole edilen, patojen mikroorganizmalara karşı biyolojik olarak aktif bileşikleri araştırmaya yönelmişlerdir. Biz de bu çalışmada rezene ve adaçayı bitkilerinden elde edilen uçucu yağların antimikrobiyal aktivitelerini araştırdık. Antimikrobiyal aktivite disk difüzyon metoduna göre Gram negatif ve Gram pozitif bakterilere karşı belirlenmiştir. Her iki uçucu yağ da test edilen bakteriler üzerinde farklı düzeylerde antimikrobiyal aktivite sergilemişlerdir.