Résumé:
Plants used in traditional pharmacopoeia represent a considerable resource of
bioactive molecules of interest to the pharmaceutical and cosmetics industry. This
study focused on the extraction of polyphenols and tannins from the bark of
pomegranate (Punica granatum L.) and carob (Ceratonia siliqua L.), two Algerian
medicinal plants. Two extraction methods were compared: conventional solid-liquid
extraction and ultrasound-assisted extraction. Deep eutectic solvents were used as
ecological alternatives. Quantitative results revealed that for carob, total polyphenols
contents were 78,880± 11,002( mg EAG/ ml) (water bath) and 100,146 ±31,172 (mg
EAG/ml) (ultrasound), 8lavonoïdes 1. 445± 0.262 ( mg EQ/ml) (ultrasound) and 1.010
± 0.158 (mg EQ/ml) (water bath).hydrolysable tannins from 5.838± 1.529 ( mg EAT/
ml )(water bath) and 16.221± 0.912( mg EAT/ml)(ultrasound). For pomegranate,
total polyphenols were 41.126± 11.231 (mg EAG/ml) (water bath) and 72.593± 2.456
(mg EAG/ml) (ultrasound), 8lavonoïdes 0. 845± 0.111 (mg EQ/ ml) (water bath) and
1,206± 0.179 (mg EQ/ ml) (ultrasound), and hydrolysable tannins from 5,824± 0.971
(mg EAT / ml) (water bath) and 7,485± 0.324 (mg EAT/ml) (ultrasound). Evaluation
of biological activities revealed strong antioxidant and anti-in8lammatory activity of
extracts obtained by ultrasound, particularly with ethanol-ED
