Antioxidant Activity of Supercritical Extracts of Populus Buds
نویسندگان
چکیده
In the last years the supercritical fluid extraction has been frequently used to obtain volatile oils from aromatic plants. In this work we have applied this technique to a different vegetable matrix: poplar (Populus nigra and MC) buds as it is known that they contain antioxidant compounds. The results of the supercritical extraction have been compared with those of the conventional soxhlet extraction. Besides the activity of the natural antioxidants in the poplar bud extracts has been assessed by the spectroscopic method of the DPPH radical and the effective concentration (EC50) in an hour has been calculated. The chemical composition of the extracts was determined using GC-MS chromatography.
منابع مشابه
Antioxidant activity of various parts of Cinnamomum cassia extracted with different extraction methods.
The aim of this study was to investigate the antioxidant activities of various parts (barks, buds, and leaves) of Cinnamomum cassia extracted with ethanol and supercritical fluid extraction (SFE). For the antioxidant activity comparison, IC50 values of the SFE and ethanol extracts in the DPPH scavenging assay were 0.562-10.090 mg/mL and 0.072-0.208 mg/mL, and the Trolox equivalent antioxidant c...
متن کاملPhytochemical Analysis, Antioxidant Activity and Ecological Requirements of Capparis spinosa L. in Golestan and Semnan Provinces (North of Iran)
Natural antioxidants have an important role against damage by ROS. This research had been carried out about ecological characters, phytochemical and antioxidant activity of Capparis spinosa L. in Semnan and Golestan province. So in much field observation, different parts of C.spinosa were collected from two natural habitats in Golestan (200 m) and Semnan province (2100 m) during August to Septe...
متن کاملComparing conventional and supercritical extraction of (-)-mammea A/BB and the antioxidant activity of Calophyllum brasiliense extracts.
Calophyllum brasiliense is a rich source of bioactive coumarins, xanthones and biflavonoids. The aim of the study was to compare the phenol contents and the antioxidant activity of C. brasiliense extracts obtained by conventional and supercritical fluid extraction (SFE) methods, as well as the quantification of crude extracts and (-)-mammea A/BB yields. Dichloromethane and hexane were used as s...
متن کاملGC-MS analysis of compounds extracted from buds of Populus balsamifera and Populus nigra.
The composition of hexane and ether extracts from buds of two poplar species (Populus balsamifera and P. nigra) was investigated by GC-MS method. In hexane extracts, 54 "neutral" compounds were recorded. The greatest amounts of them are sesquiterpenes and n-alkanes. Among 56 components of ether extracts, many aliphatic acids and hydroxyacids were detected. However, the main fraction consists of...
متن کاملSupercritical Fluid Extraction of Bioactive Compounds from Cystoseira Abies-marina Algae
Supercritical carbon dioxide with ethanol as modifier was employed in the extraction of functional food ingredients from Cystoseira abies-marine algae. Three different types of pre-treatment were employed to prepare the vegetal raw material producing an important effect on extraction yield. The experimental assays were carried out in a semi-continuous extraction cell at 290 bar, 40 °C and using...
متن کامل