Learn More
The antioxidant properties and phenolic composition of 27 Sideritis species were studied. Plant samples were extracted with petroleum ether using a Soxhlet apparatus. The defatted plant materials were extracted with 70% methanol. Antioxidant activities of the extracts were measured using Fe+2 induced linoleic acid peroxidation, as indicated by(More)
Six cycloartane-type triterpene glycosides were isolated from Astragalus stereocalyx along with six known cycloartane-type glycosides. Their structures were established by the extensive use of 1D and 2D-NMR experiments along with ESIMS and HRMS analysis. Three compounds are based on an aglycon characterized by the occurrence of an unusual hydroxyl group at(More)
Plants of the genus Prangos (Apiaceae) are widely distributed around the world and number more than 30 species [1]. Coumarins were isolated in previous invetigations of plants from this genus [2, 3]. The raw material for our studies was collected in Turkey and until now had not been investigated chemically. Ground air-dried roots (0.9 kg) were extracted(More)
The genus Gnaphalium L. (Asteraceae) is represented in Turkey by six different species and altogether seven taxa, only one being endemic. G. luteo-album L. (flannel-leaf or cud-weed in English) is an annual woolly plant with simple entire and sessile leaves, having small clustered heads. The stem is leafless, growing upwards, and heads are corymbose [1]. It(More)
The fruits of endemic Prangos uechtritzii Boiss. & Hausskn. (Umbelliferae) were subjected to hydrodistillation and microdistillation. The resulting volatiles were investigated by GC-MS to determine the composition of the essential oils. 109 compounds representing 86.7% and thirty-two compounds representing 90.0% were identified and isolated by two different(More)
Thymus praecox ssp. grossheimii (RONNIGER) JALAS var. grossheimii (Lamiaceae) is used as an herbal tea for cold, stomachache, cough, and infections in Turkey. There are no phytochemical studies on this species. We performed phytochemical studies and quantitative analysis of rosmarinic acid and luteolin 5-O-β-D-glucopyranoside in the methanol extract of the(More)
The genus Tordylium L. (Umbelliferae) is represented by 16 species, including six endemic species in Turkey [1, 2]. Tordylium elegans (Boiss. & Balansa) Alava & Hub.-Mor. (Syn.: Ainsworthia elegans Boiss. & Balansa), the endemic species, grows in rocky places, fields, and roadsides as an annual plant 1 . There are only a few phytochemical and biological(More)