Browsing by Author "Ivanauskas, Liudas"
Now showing items 1-20 of 21
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Altitudinal changes in secondary metabolite contents of Hypericum androsaemum and Hypericum polyphyllum
Cirak, Cuneyt; Radusiene, Jolita; Jakstas, Valdas; Ivanauskas, Liudas; Seyis, Fatih; Yayla, Fatih (Pergamon-Elsevier Science Ltd, 2017)The genus Hypericum (Hypericaceae) has attracted scientific interest as its members have yielded many bioactive compounds. In the present study we investigated the content of hypericin, pseudohypericin, hyperforin, ... -
Altitudinal changes in the content of bioactive substances in Hypericum orientale and Hypericum pallens
Camas, Necdet; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Cirak, Cuneyt (Springer Heidelberg, 2014)Altitudinal changes in the content of hypericin, pseudohypericin, hyperforin, adhyperforin, chlorogenic acid, neochlorogenic acid, caffeic acid, 2,4-Dihydroxybenzoic acid, amentoflavone, hyperoside, isoquercitrin, quercitrin, ... -
Changes in the content of bioactive substances among Hypericum montbretii populations from Turkey
Cirak, Cuneyt; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet (Soc Brasileira Farmacognosia, 2014)In the present study, we investigated the variation in the content of seventeen secondary metabolites among Hypericum montbretii Spach., Hypericacea, populations from five different growing zones in Turkey for the first ... -
Chemical composition of Hypericum species from the Taeniocarpium and Drosanthe sections
Camas, Necdet; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Kayikci, Samim; Cirak, Cuneyt (Springer Wien, 2014)The presence of several phytochemicals, namely naphthodianthrones hypericin and pseudohypericin, phloroglucinol derivatives hyperforin and adhyperforin, the phenolic acids as chlorogenic acid, neochlorogenic acid, caffeic ... -
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 ... -
Effect of nitrogen on herb production, secondary metabolites and antioxidant activities of Hypericum pruinatum under nitrogen application
Radusiene, Jolita; Marksa, Mindaugas; Ivanauskas, Liudas; Jakstas, Valdas; Caliskan, Omer; Kurt, Dursun; Cirak, Cuneyt (Elsevier, 2019)The optimization of growing conditions using germplasm potentials is an effective way to manage the production and quality of medicinal plant raw materials. The present study aimed to evaluate the effect of mineral nitrogen ... -
Morphogenetic and phenological changes in phenolic content of Hypericum leptophyllum, an endemic Turkish species
Seyis, Fatih; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Cirak, Cuneyt (Taylor & Francis Ltd, 2016)The present study was conducted to determine the morphogenetic and phenologic variations in the content of the main bioactive compounds in Hypericum leptophyllum Hochst., an endemic species from Turkish flora. Wild plants ... -
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 ... -
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, ... -
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 in Hypericum species and their distribution in different plant parts
Odabas, Mehmet Serhat; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet; Kayikci, Samim (Lithuanian Research Centre Agriculture & Forestry, 2016)The genus Hypericum (Hypericaceae) has attracted remarkable scientific interest as its members accumulate significant amounts of various bioactive compounds. In the current study, we investigated accumulation of several ... -
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, ... -
Secondary metabolites of Hypericum species from the Drosanthe and Olympia sections
Cirak, C.; Radusiene, Jolita; Jakstas, Valdas; Ivanauskas, Liudas; Yayla, Fatih; Seyis, Fatih; Camas, Necdet (Elsevier, 2016)Eight Hypericum species native to Southern Turkey from Drosanthe and Olympia sections were investigated for the presence of several bioactive compounds, namely, hypericin, pseudohypericin, hyperforin, adhyperforin, the ... -
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 ...
