polyphenolic compounds

The antioxidant properties of ethanol-water extracts of Scorzonera purpurea subsp. rosea obtained by maceration with ethanol content of 50 % (E50) and 70 % (E70) were studied using the DPPH (E50 – 82 %, E70 – 86 %), ABTS (E50 – 89 %, E70 – 93 %) and FRAP (E50 - 23.01 μmol/ml, E70 - 23.58 μmol/ml) methods. It was determined that the studied extracts differ little in the total content of extractive substances (E50 - 19.86 mg/ml, E70 - 19.4 mg/ml), the sum of polyphenolic compounds (E50 - 2.02 mgGC/ml, E70 - 2.11 mgGC/ml), flavonoids (E50 - 0.235 mgC/ml, E70 - 0.276 mgC/ml).

Alcohol-water extracts of Thymus vulgaris have obtained by ultrasonic extraction method for different times extraction. The obtained extracts have been tested for the quantitative content of extractive substances, phenolic compounds and flavonoids and for the presence of antioxidant activity. The best studied indicators were found in extract obtained by ultrasound extraction for 40 minutes (content of extractive substances 25 mg / ml, sum of polyphenolic compounds 30 mg / ml, flavonoids content 45 mg / ml).