Yazar "Çırak, Cüneyt" için listeleme
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Altitudinal changes in secondary metabolite contents of Hypericum androsaemum and Hypericum polyphyllum
Çırak, Cüneyt; 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, ... -
Chemical and morphological diversity among wild populations of Hypericum aviculariifolium Jaub. et Spach subsp. depilatum ( Freyn et Bornm.) N. Robson var. depilatum
Çırak, Cüneyt; Özcan, Aysel; Yurteri, Emine; Kurt, Dursun; Seyis, Fatih (Univ Zagreb, Fac Science, Div Biology, 2020)In this study, the chemical and morphological diversity among eleven wild populations of Hypericum avicularlifolium Jaub. et Spach subsp. depilatum (Freyn et Bornm.) N. Robson var. depilatum, an endemic Turkish species was ... -
Distribution of phenolic compounds and antioxidant activity in plant parts and populations of seven underutilized wild achillea species
Raudone, Lina; Radusiene, Jolita; Seyis, Fatih; Yayla, Fatih; Vilkickyte, Gabriele; Marksa, Mindaugas; Ivanauskas, Liudas; Çırak, Cüneyt (MDPI, 2022)Evaluation of phytochemical composition of underutilized Achillea species provides the primary selection of germplasms with the desired quality of raw material for their further applications. The aim of the study was to ... -
Hypericum origanifolium Willd.: the essential oil composition of a new valuable species
Bertoli, Alessandra; Çırak, Cüneyt; Seyis, Fatih (Elsevier, 2015)Turkish Hypericum origanifolium Willd has been recently considered for its hypericin and phenolic content as a potential substitute of the well-established EU market position Hypericum perforatum. However, a complete ... -
Hypericum spp. volatile profiling and the potential significance in the quality control of new valuable raw material
Bertoli, Alessandra; Çırak, Cüneyt; Seyis, Fatih (Elsevier, 2018)The genus Hypericum (Guttiferae) is one of the most representative species in temperate zones and Turkey is one of the most important Mediterranean sites. Due to the increasing commercial value of Hyperici herba (Hypericum ... -
Morphogenetic and phenological changes in phenolic content of Hypericum leptophyllum, an endemic Turkish species
Seyis, Fatih; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Çırak, Cüneyt (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 compounds and antioxidant activity of Achillea arabica populations
Çırak, Cüneyt; Radusiene, Jolita; Raudone, Lina; Vilkickyte, Gabriele; (Seyis, Fatih; Marksa, Mindaugas; Ivanauskas, Liudas; Yayla, Fatih (Elsevier, 2022)In this study, we aimed to present the screening of the contents of phenolics including caffeoylquinic acid derivatives, quercetin, luteolin, apigenin and some their derivatives as well as santin and total antioxidant ... -
Phenolic constituents of six Hypericum species from Türkiye and their chemotaxonomic relevance
Çırak, Cüneyt; Seyis, Fatih (Elsevier, 2023)Hypericum species have been of great interest to mankind for centuries and Türkiye is a global intersection for these species. In the present study, 20 wild populations of six under-exploited species of Turkish Hypericum ... -
Secondary metabolites of hypericum species from the drosanthe and olympia sections
Çırak, Cüneyt; Radusiene, Jolita; Jakstas, Valdas; Ivanauskas, Liudas; Yayla, Fatih; Seyis, Fatih; Çamaş, 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 ... -
Secondary metabolites of seven Hypericum species growing in Turkey
Çırak, Cüneyt; Radusiene, Jolita; Jakstas, Valdas; Ivanauskas, Liudas; Seyis, Fatih; Yayla, Fatih (Taylor & Francis Ltd, 2016)Context the genus Hypericum (Hypericaceae) has attracted remarkable scientific interest as its members have yielded many bioactive compounds. Objective the current study presents investigations on the accumulation of ... -
Trends in phenolic profiles of achillea millefolium from different geographical gradients
Radusiene, Jolita; Karpaviciene, Birute; Raudone, Lina; Vilkickyte, Gabriele; Çırak, Cüneyt; Seyis, Fatih; Yayla, Fatih; Marksa, Mindaugas; Rimkiene, Laura; Ivanauskas, Liudas (MDPI, 2023)The traditional widely used raw material of Achillea millefolium is currently mainly derived from wild populations, leading to diversification and uncertainty in its quality. The aim of the study was to determine the ... -
Volatile secondary metabolites of Hypericum tetrapterum and Hypericum bithynicum
Seyis, Fatih; Yurteri, Emine; Özcan, Aysel; Çırak, Cüneyt; Yayla, Fatih (Elsevier, 2022)The phytochemical analyses on the flowering aerial parts resulted in identification of 32 and 30 compounds which represent 100% of total volatile components in Hypericum tetrapterum and Hypericum bithynicum (Hypericaceae), ... -
Volatile secondary metabolites of six Turkish Hypericum species: chemical composition and chemotaxonomic significance
Çırak, Cüneyt; Seyis, Fatih (Taylor & Francis Ltd., 2023)Volatile secondary metabolite profiles of 20 wild populations of six taxa from four sections of Turkish Hypericum (Hypericaceae; H. orientale, H. bupleuroides, H. venustum, H. hirsutum, H. linarioides and H. androsaemum) ...
