Yazar "Janulis, Valdimaras" 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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 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 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 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 ... -
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 ...
