Yazar "Cirak, Cuneyt" için listeleme
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Morphogenetic changes in essential oil composition of Hypericum perforatum during the course of ontogenesis
Bertoli, Alessandra; Cirak, Cuneyt; Leonardi, Michele; Seyis, Fatih; Pistelli, Luisa (Taylor & Francis Ltd, 2011)Context: In the past few years, an increasing interest in the volatile secondary metabolites of Hypericum perforatum L. (Guttiferae) has been arising. Objective: The present study is a contribution to better understand the ... -
Phenolic constituents of Hypericum triquetrifolium Turra (Guttiferae) growing in Turkey: variation among populations and plant parts
Cirak, Cuneyt; Radusiene, Jolita; Janulis, Valdimaras; Ivanauskas, Liudas; Camas, Necdet; Ayan, Ali Kemal (Tubitak Scientific & Technical Research Council Turkey, 2011)Hypericum triquetrifolium Turra (Guttiferae) has received considerable scientific interest in recent years, as it is a source of a variety of biologically active compounds including phenolics. The present study was conducted ... -
Phenological changes in the chemical content of wild and greenhouse-grown Hypericum pruinatum: flavonoids
Cirak, Cuneyt; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet (Tubitak Scientific & Technical Research Council Turkey, 2014)The present study was conducted to determine the phenological changes in the content of main flavonoids, namely amentoflavone, hyperoside, isoquercitrin, quercitrin, quercetin, avicularin, rutin, (+)-catechin, and ... -
The quantitative effect of temperature and light intensity at growth in Origanum onites L.
Caliskan, Omer; Odabas, Mehmet Serhat; Cirak, Cuneyt; Radusiene, Jolita; Odabas, Ferhat (Academic Journals, 2010)The study was aimed to define the relationships between temperature, light intensity and growth parameters. Namely, net assimilation rate, relative growth rate, leaf weight ratio, leaf area ratio and specific leaf area for ... -
The Quantitative Effects of Temperature and Light Intensity on Phenolics Accumulation in St. John's Wort (Hypericum perforatum)
Odabas, Mehmet Serhat; Camas, Necdet; Cirak, Cuneyt; Radusiene, Jolita; Janulis, Valdimaras; Ivanauskas, Liudas (Natural Products Inc, 2010)The quantitative effects of temperature and light intensity on accumulation of phenolics were examined on greenhouse-grown plants of Hypericum perforatum L. Plants were grown in a greenhouse separated into two parts: shaded ... -
Response of soybean (Glycine max) to soil and foliar applied boron at different rates
Cirak, Cuneyt; Odabas, Mehmet Serhat; Kevseroglu, Kudret; Karaca, Emel; Gulumser, Ali (Indian Counc Agricultural Res, 2006)An experiment was conducted to examine the effect of soil and foliar application of boron (66.14 % B 2 0) at different rates (0, 0.5, 1, 1.5 and 2 kg/ha) on plant height, first pod height, pod/plant, boron content of seed, ... -
Secondary metabolites in Hypericum perfoliatum: variation among plant parts and phenological stages
Cirak, Cuneyt; Radusiene, Jolita; Janulis, Valdimaras; Ivanauskas, Liudas (Birkhauser Verlag Ag, 2007)The genus Hypericum is a source of biologically active compounds, notably hypericin and various phenolics. The concentrations of these compounds in plant tissues vary among plant parts and during the growing season. To ... -
Secondary Metabolites of Hypericum leptophyllum Hochst., an Endemic Turkish Species
Camas, Necdet; Radusiene, Jolita; Stanius, Zydrunas; Caliskan, Omer; Cirak, Cuneyt (Hindawi Ltd, 2012)In the present study, the presence of the phloroglucinol derivative hyperforin, the naphthodianthrones hypericin and pseudohypericin, the phenylpropane chlorogenic acid and the flavonoids rutin, hyperoside, kaempferol, ... -
Secondary metabolites of Hypericum orientale L. growing in Turkey: variation among populations and plant parts
Cirak, Cuneyt; Radusiene, Jolita; Stanius, Zydrunas; Camas, Necdet; Caliskan, Omer; Odabas, Mehmet Serhat (Springer Heidelberg, 2012)The present study was conducted to determine the variation in the content of several plant chemicals, namely hyperforin, hypericin, pseudohypericin, chlorogenic acid, rutin, hyperoside, isoquercetine, kaempferol, quercitrine ... -
Variation of bioactive compounds in Hypericum perforatum growing in turkey during its phenological cycle
Cirak, Cuneyt; Radusiene, Jolita; (Saglam) Karabuk, Birsen; Janulis, Valdimaras; Ivanauskas, Liudas (Wiley, 2007)The present study was conducted to determine phenologic and morphogenetic variation of hypericin, chlorogenic acid and flavonoids, as rutin, hyperoside, apigenin-7-O-glucoside, quercitrin, quercetin content of Hypericum ... -
Variation of bioactive substances and morphological traits in Hypericum perforatum populations from Northern Turkey
Cirak, Cuneyt; Radugien, Jolita; Karabuk, Birsen; Janulis, Valdimaras (Pergamon-Elsevier Science Ltd, 2007)Hypericum perforatum L. has become one of the leading plant-based dietary supplements worldwide and its biological activities have been mainly attributed to hypericin and phenolic contents. The present study was conducted ... -
Variation of bioactive substances in Hypericum montbretii during plant growth
Cirak, Cuneyt; Radusiene, Jolita; Arslan, Burhan (Taylor & Francis Ltd, 2008)The present study was conducted to determine phenologic and morphogenetic variation of chlorogenic acid and flavonoids, as rutin, hyperoside, apigenin-7-O-glucoside, quercitrin, quercetin and viteksin content of Hypericum ... -
Variation of hypericins in Hypericum triquetrifolium Turra growing in different locations of Turkey during plant growth
Ayan, Ali Kemal; Cirak, Cuneyt (Taylor & Francis Ltd, 2008)The principle medicinal secondary metabolites present in Hypericum species are thought to be naphthodianthrones hypericin and pseudohypericin. The present study was conducted to determine ontogenetic and morphogenetic ... -
Variations in total phenolics during ontogenetic, morphogenetic, and diurnal cycles in Hypericum species from Turkey
Ayan, Ali Kemal; Cirak, Cuneyt; Yanar, Oguzhan (Springer Heidelberg, 2006)Several species of Hypericum are used in traditional Turkish folk medicine. Their most medicinally important secondary metabolites are the hypericins, hyperforins, and phenolics. Here, we determined the ontogenetic, ...