Yazar "Cirak, Cueneyt" için listeleme
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Chemical constituents of Hypericum adenotrichum Spach, an endemic Turkish species
Cirak, Cueneyt; Ivanauskas, Liudas; Janulis, Valdimaras; Radusiene, Jolita (Taylor & Francis Ltd, 2009)The present study was conducted out to determine hyperforin, hypericin, pseudohypericin, chlorogenic acid, rutin, hyperoside, quercitrin, quercetin, kaempferol, apigenin-7-O-glucoside and amentoflavone contents of Hypericum ... -
Chemical constituents of some Hypericum species growing in Turkey
Cirak, Cueneyt; Radusiene, Jollita; Janullis, Valldirnaras; Lvanauskas, Liudas; Arslan, Burhan (Springer Heidelberg, 2007)The present study was conducted to determine the content of pharmacologically important constituents hypericin, pseudohypericin, chlorogenic acid, rutin, hyperoside, apigenin-7-O-glucoside, quercitrin, quercetin and vitexin ... -
Essential oil composition and variability of Hypericum perforatum from wild populations of northern Turkey
Cirak, Cueneyt; Bertoli, Alessandra; Pistelli, Luisa; Seyis, Fatih (Taylor & Francis Ltd, 2010)Context: Hypericum perforatum L. (Guttiferae) contains many bioactive secondary metabolites including hypericins, hyperforins, and essential oil. Objective: The present study was conducted to determine the variation in ... -
Models of estimation of the content of secondary metabolites in some Hypericum species
Odabas, Mehmet Serhat; Radusiene, Jolita; Cirak, Cueneyt; Camas, Necdet (Taylor & Francis Ltd, 2009)In the present study, models for estimation of the content of main secondary metabolites, namely hypericin, pseudohypericin, and hyperforin, were developed for Hypericum origanifolium Willd. (Guttiferae), Hypericum perfoliatum ... -
Population Variability of Main Secondary Metabolites in Hypericum lydium Boiss. (Hypericaceae)
Cirak, Cueneyt; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet (Shaheed Beheshti Univ, Sch Pharmacy, 2015)In the present study, we investigated the variation in the content of naphthodianthrones hypericin and pseudohypericin, phloroglucinol derivatives hyperforin and adhyperforin, the phenolic acids as chlorogenic acid, ... -
Prediction Model of Leaf Area For Trigonella Foenum Graecum L.
Odabas, Mehmet Serhat; Aydin, Ali; Kevseroglu, Kudret; Cirak, Cueneyt (Soc Field Crop Sci, 2009)Reliable equations were offered to predict leaf area for Trigonella foenum. Lamina width, length and leaf area were measured without destroying plant to develop the models. All equations produced for leaf area were derived ... -
Prediction models for the phenolic contents in some Hypericum species from Turkey
Odabas, Mehmet Serhat; Radusiene, Jolita; Cirak, Cueneyt; Camas, Necdet (Asian Journal of Chemistry, 2008)In this research, models for prediction of the content of several phenolics namely chlorogenic acid, hyperoside, apigenin-7-O-glucoside, rutin, quercitrin, quercetin and viteksin were developed for Hypericum originafolium ... -
Pseudohypericin and hyperforin in Hypericum perforatum from northern turkey: Variation among populations, plant parts and phenological stages
Cirak, Cueneyt; Radusiene, Jolita; Janulis, Valdimaras; Ivanauskas, Liudas (Wiley, 2008)Hypericum perforatum is a perennial medicinal plant known as "St. John's wort" in Western Europe and has been used in the treatment of several diseases for centuries. In the present study, morphologic, phenologic and ... -
Pseudohypericin and hyperforin in two Turkish Hypericum species: Variation among plant parts and phenological stages
Cirak, Cueneyt; Radusiene, Jolita; Camas, Necdet (Pergamon-Elsevier Science Ltd, 2008)The genus Hypericum has received considerable interest from scientists, as it contains the variety of structurally diverse natural products which possess a wide array of biological properties, mainly hypericins and hyperforin. ... -
The quantitative effects of temperature and light intensity on hyperforin and hypericins accumulation in Hypericum perforatum L
Odabas, Mehmet Serhat; Radugiene, Jolita; Camas, Necdet; Janulis, Valdimaras; Ivanauskas, Liudas; Cirak, Cueneyt (Academic Journals, 2009)The quantitative effects of temperature and light intensity on accumulations of hyperforin, hypericin and pseudohypericin were examined in greenhouse-grown Hypericum perforatum L. plants. Polyethylene cover of 50% transparency ... -
Seasonal variation of hypericin and pseudohypericin contents in Hypericum scabrum L. growing wild in Turkey
Ayan, Ali Kemal; Cirak, Cueneyt; Gueney, Kerim (Natural Products Inc, 2008)The present study was conducted to determine ontogenetic and morphogenetic variations of hypericin and pseudohypericin contents in Hypericum scabrum growing in Turkey. Plants were harvested at vegetative, floral budding, ... -
Secondary Metabolites of Hypericum confertum and their Possible Chemotaxonomic Significance
Cirak, Cueneyt; Radusiene, Jolita; Janulis, Valdimaras; Ivanauskas, Liudas (Sage Publications Inc, 2010)The phloroglucinol derivative hyperforin, the naphthodianthrones hypericin and pseudohypericin, the phenylpropane chlorogenic acid, and the flavonoids rutin, hyperoside, apigenin-7-O-glucoside, kaempferol, quercitrin, ... -
Secondary metabolites of Hypericum scabrum and Hypericum bupleuroides
Ayan, Ali Kemal; Radusiene, Jolita; Cirak, Cueneyt; Ivanauskas, Liudas; Janulis, Valdimaras (Taylor & Francis Ltd, 2009)The genus Hypericum (Guttiferae) is a source of biologically active secondary metabolites, notably hyperforin, hypericins and various phenolics. In the present study the presence of the phloroglucinol derivative hyperforin, ... -
Variation of bioactive secondary metabolites in Hypericum origanifolium during its phenological cycle
Cirak, Cueneyt; Radusiene, Jolita; Ivanauskas, Liudas; Janulis, Valdimaras (Springer Heidelberg, 2007)The genus Hypericum has received considerable interest from scientists, as it contains the variety of structurally diverse natural products which possess a wide array of biological properties. The present study was conducted ... -
Variation of Bioactive Secondary Metabolites in Hypericum triquetrifolium Turra from Wild Populations of Turkey
Camas, Necdet; Radusiene, Jolita; Ayan, Ali Kemal; Cirak, Cueneyt; Janulis, Valdimaras; Ivanauskas, Liudas (Sage Publications Inc, 2008)The present study was conducted to determine the variation in the content of hyperforin, hypericin and pseudohypericin in Hypericum triquetrifolium Turra growing wild in four locations of Turkey. The aerial parts, representing ...
