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This paper presents a comparative study of the anti-oxidant and anti- -microbial activities, total phenolic compounds and total flavonoids in extracts obtained from houseleek (Sempervivum marmoreum L.) leaves by the classical (maceration), ultrasonic and Soxhlet extraction (CE, UE and SE, respectively). The extract obtained by the CE contained higher amounts of phenolic and fla- vonoid compounds and showed a better antioxidant activity than those obtained using other two techniques. All the extracts, independent of the extraction tech- nique applied, showed antimicrobial activities against Aspergillus niger and Candida albicans only but not against the tested bacteria.

Comparative screening of the anti-oxidant and antimicrobial activities of Sempervivum marmoreum L. extracts obtained by various extraction techniques