Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2021Variation of Bioactivities and Phytochemical Compositions of Valeriana dioscoridis Sm. Extracts
Uçar, Esra; Atas, Mehmet; Çilesiz, Yeter; Çinbilgel, Ilker; Eruygur, Nuraniye; Karaköy, Tolga
Valerian (Valeriana dioscoridis Sm.) is a perennial herb of the Caprifoliaceae family. The aim of this study was to determine the variation of V. dioscoridis plants grown in different regions in respect of the quality criteria traits such as nutrient values, extract contents and in vitro antioxidant and antimicrobial activity values. In this study, roots and rhizomes of V. dioscoridis Sm. were collected from eight different locations in Antalya province. The obtained materials were ground in a blender and extracted with 80% ethanol. The macro and micro-nutrient elements contents of the powdered plant samples were evaluated and the antioxidant and antimicrobial activities of the extracts were investigated. Based on the data obtained, there were different values in the antioxidant, antimicrobial activities, nutrient content and chemical composition content of extracts of V. dioscoridis Sm. plants grown in different locations.
- MakaleYalnız künye2021Flame atomic absorption spectrometric determination of total chromium and cadmium in bean samples after ultrasonic-assisted microextraction using ionic liquid Aliquat-336
Elik, Adil; Karakoy, Tolga; Çilesiz, Yeter; Altunay, Nail
A new and rapid microextraction approach termed as ultrasonic-assisted ionic liquid-based microextraction (UA-ILME) was developed using ionic liquid Aliquat-336 as extraction solvent for the extraction of chromium and cadmium in bean samples collected from different regions in Turkey. The total amounts of analytes in the samples were measured by flame atomic absorption spectrophotometry. The basis of the extraction step is based on the complexation of Cr(III) and Cd(II) with diethyldithiocarbamate at pH 4.0. The hydrophobic ternary complexes containing analytes were then rapidly extracted from the sample solution to the ionic phase under the ultrasonic effect using tricaprylylmethylammonium chloride (Aliquat-336). Some experimental variables (pH, ligand amount, extraction solvent volume, ultrasound time, extraction temperature and sample volume) were optimized in detail. Following the optimization steps, the limits of detection (LODs, 3Sblank/m) for Cr(III) and Cd(II) were calculated as 0.45 ng mL−1 with linear range of 1.5–380 ng mL−1 and 0.25 ng mL−1 with linear range of 0.8–220 ng mL−1, respectively. Enrichment factors and average recoveries were ranged from 125.8–96.4 to 92.7–106.5%, respectively. The accuracy and precision of the method were validated by analyzing a certified reference material and spiked recovery tests. The UA-ILME method was successfully applied to the determination of Cd and Cr in the samples, highlighting that the matrix ions under consideration do not affect the extraction and determination steps.
- MakaleAçık Erişim2020Some Quality Criteria of Valerian (Valeriana dioscoridis Sm.) Growing in Different Environments
Uçar, Esra; Ataş, Mehmet; Çilesiz, Yeter; Çinbilgel, İlker; Eruygur, Nuraniye; Oral, İrem Zeynep; Karaköy, Tolga
Valerian (Valeriana dioscoridis Sm.) is a perennial herb of the Caprifoliaceae family. The genus Valeriana L. is represented by 14 species (15 taxa) in Turkey. This plant contains flavone glycosides, iridoids and lignans. Among these components, the medically important active ingredient is valerianic acid. Essential oils from valerian roots and rhizomes are used for the treatment of various diseases, including insomnia, mental illness, anxiety, menstrual cramps and physical stress conditions. In this study, evaluations were made of the root and rhizome of valerian plants grown in a natural environment and in greenhouse condition. The macro and micro nutrient contents of the powdered plant samples, and the antioxidant and antimicrobial activity values of the extracts were reported. Except for some macro and micro elements, it was determined that antioxidant and antimicrobial activities of plants cultivated and grown in nature were not different. The major components of both the natural and cultivated forms were determined to be 9-Borabicyclo [3.3.1] nonane, 9-[3-(dimethylamino) propyl]- (17.55% and 22.65%, respectively). The heavy metales such as Fe (415.21±47.8 mg/kg), Cu (50.9±0.2 mg/kg) and Mn (274.6±9.5 mg/kg), were obtained above limit values in grown plants of natural environment conditions.