Browsing by Author "Toker, Zuhal"
Now showing items 1-14 of 14
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3-hydroxy fatty acids from the flowers of Hypericum lysimachioides var. lysimachioides
Fatty acid methyl esters in the leaves and flowers of Hypericum lysimachioides var. lysimachioides (Guttiferae) were analyzed by gas chromatography and gas chromatography-mass spectrometry. The flowers of H. lysimachioides ... -
The antimicrobial activity of essential oils of Hypericum scabrum, Hypericum scabroides and Hypericum triquetrifolium
Kızıl, Göksel; Toker, Zuhal; Özen, Hasan Çetin; Aytekin, Çetin (Wiley, 2004)The essential oils of Hypericum scabrum, Hypericum scabroides and Hypericum triquetrifolium were studied for the first time for their antimicrobial activity against nine organisms. All the essential oils exhibited some ... -
ANTIOXIDANT AND ANTIMICROBIAL EFFECTS OF HYPERICUM RETUSUM AUCHER PLANT EXTRACTS PREPARED IN VARIOUS SOLVENTS
Akgoz, Yasemin; Toker, Zuhal (Parlar Scientific Publications (P S P), 2013)In this study, the antioxidant and antimicrobial effects of petroleum ether, hexane, ethyl acetate and methanol extracts of Hypericum retusum Aucher are investigated. The antioxidative potential of H. retusum extracts was ... -
Astragalus diphtherites FENZL var. diphtherites ve astragalus gymnalopecias RECH. FIL’in gövde ve kök kısımlarından farklı çözücüler ile elde edilen özütlerin invitro antioksidan ve antimikrobiyal özelliklerinin belirlenmesi
Keskin, Cumali; Özen, Hasan Çetin; Toker, Zuhal; Kızıl, Göksel; Kızıl, Murat (Kahramanmaraş Sütçü İmam Üniversitesi, 2018)Bu çalışmanın amacı farkı polariteye sahip çözücü serilerinden geçiren Astragalus diphtherites var. diphtherites (A. diphtherites) ve Astragalus gymnalopecias (A. gymnalopecias) türlerinin gövde ve kök kısımlarının ... -
Bazı hypericum türlerinin uçucu yağ bileşenleri ve bu yağların antimikrobiyal aktiviteleri
Toker, Zuhal (2016)Bu çalışmada, Güneydoğu Anadolu bölgesinden toplanan; Hypericum hyssopifolium Chaix var. microcalysinum Boiss&Heldr, Hypericum scabroides Robson&Poulter, Hypericum scabrum L., Hypericum lysimachioides Boiss var. lysimachioides, ... -
Carthamus Glaucus Bieb. üzerine fitokimyasal araştırmalar
Toker, Zuhal (2015)Bu çalışmada, Carthamus glaucus 'un sekonder metabolitleri incelenmiştir. Bitki kurutulup, öğütülerek EtOH ile özütlenmiştir. Evapore edilerek elde edilen bitki özütü, silika-jel kolonlarından; artan oranlarda EtOAc ... -
Composition of essential oil of Carthamus glaucus Bieb. subsp glaucus
Toker, Zuhal; Keskin, Cumali (Asian Journal Of Chemistry, 2008)The essential oil of water distilled aerial parts of Carthamus glaucus Bieb. subsp. glaucus (Compositae) was analyzed by GC/MS. 23 Components were characterized representing 87.3% of total component in oil sample. The major ... -
Composition of the essential oil of achillea pseudoaleppica Hub.-Mor
Water-distilled essential oil from aerial parts of Achillea pseudoaleppica, an endemic species in Turkey, was analyzed by GC and GC/MS. Seventy components were characterized representing 92.4% of the total component in oil ... -
EFFECT OF UV-C ON PRODUCTION OF HYPERICIN IN Hypericum triquetrifolium Turra GROWN UNDER IN-VITRO CONDITIONS
Namli, Suereyya; Toker, Zuhal; Isikalan, Cigdem; Oezen, Hasan Cetin (Parlar Scientific Publications (P S P), 2009)In this study, the effects of UV-C radiation on the increasing of hypericin in Hypericum triquetrifolium Turra were investigated by using in vitro techniques. The mature seeds of Hypericum triquetrifolium Turra were ... -
Effects of UV-B radiation on total phenolic, flavonoid and hypericin contents in Hypericum retusum Aucher grown under in vitro conditions
Namli, Sureyya; Isikalan, Cigdem; Akbas, Filiz; Toker, Zuhal; Tilkat, Emine Ayaz (Taylor & Francis Ltd, 2014)This study was conducted to increase total phenolics, flavonoids and hypericin accumulation in in vitro cultures of Hypericum retusum Aucher to determine the appropriate time of UV radiations. Proliferation of plantlets ... -
Fatty acid and 3-hydroxy fatty acid composition of two Hypericum species from Turkey
Özen, Hasan Çetin; Başhan, Mehmet; Keskin, Cumali; Toker, Zuhal (Wiley, 2004)The fatty acid compositions of flowering tops of Hypericum perforatum L. and Hypericum retusum Aucher (Guttiferae) were analyzed by gas chromatography and gas chromatography-mass spectrometry. The major components were ... -
Hypericum retusum aucher bitkisinin farklı çözücülerde hazırlanan ekstraktlarının antioksidan etkileri
Akgöz, Yasemin (2009)Hypericum retusum Aucher, Hypericaceae ailesine mensup otsu bir bitki türüdür. Hypericum’ların dünyada 400’ü aşkın, Türkiye’ de ise 70 farklı türü vardır. Bitkinin kanıtlanmış etkilerinden bazıları yara iyileştirici, ... -
Mutagenicity of Hypericum lysimachioides extracts
Tolan, Veysel; Toker, Zuhal; Ozdemir, Sadin; Demirci, Oezlem; Otludil, Birol; Oezen, Hasan C. (Taylor & Francis Inc, 2009)Hypericum (Hypericaceae) species are extensively used in several fields such as traditional medicine, food and crop protection. Despite its usage in many fields, the identification of the genotoxic potential of this herb ... -
Variation of total hypericin, phenolic and flavonoid compounds in Hypericum triquetrifolium during its phenological cycle
Toker, Zuhal (Taylor & Francis Ltd, 2009)The genus Hypericum (Hypericaceae) contains a variety of structurally diverse natural products which possess a wide array of biological properties. The present study examined quantitative variations in total hypericin, ...
