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

摘要

Рад представла компаративну студиjу антиоксидативног, антимикробног деjства и са-држаjа укупних фенолних и флавоноидних jединена у екстрактима добиjеним из листа чу-варкуhе (Sempervivum marmoreum L.) мацерациjом, ултразвучном екстракциjом и екстрак-циjом по Сокслету. Екстракт добиjен мацеравиjом садржи више фенолних и флавоноидних jедин.ена и показуjе вене антиоксидативно деjство него екстракти добиjени осталим техни-кама. Сви екстракти независно од применете технике показуjу сличну антимикробну актив-ност према Aspergillus niger и Candida albicans али не и према тестираним бактериjама.%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 technique applied, showed antimicrobial activities against Aspergillus niger and Candida albicans only but not against the tested bacteria.