Antioxidant and Antimicrobial Activities of Echinacea (Echinacea purpurea L.) Extracts Obtained by Classical and Ultrasound Extraction  

用传统和超声提取的松果菊(紫锥菊属)的抗氧化和抗菌活性(英文)

作　　者：Ivana Stanisavljevi Sаa Stojievi Dragan Velikovi Vlada Veljkovi Miodrag Lazi 

机构地区：[1]Faculty of Technology,University of Ni [2]Chemical Industry Nevena A.D.,Djordja Stamenkovia St. [3]Zdravlje-Actavis,Vlajkova 199

出　　处：《Chinese Journal of Chemical Engineering》2009年第3期478-483,共6页中国化学工程学报（英文版）

基　　金：Supported by the Ministry of Science and Environmental Protection,Republic of Serbia (142073B)

摘　　要：Antioxidant and antimicrobial activities of Echinacea purpurea L. (Asteraceae) extracts obtained by classical and ultrasound solvent extraction were compared. The dry aerial part of plant was extracted by 70% etha-nol at a solid-to-liquid ratio of 1︰10 (m/v) and 25°C. The extract obtained by classical solvent extraction contained 29% larger amounts of phenolic compounds and 20% higher content of flavonoids. 2,2-diphenyl-1-picril hydrazyl radical (DPPH) scavenging reached 93.6% and the values of EC50 were (34.16±0.65) μg·ml-1 and (65.48±1.12) μg·ml-1 for the extracts obtained by the classical and ultrasound extractions, respectively. The extracts, independent of the extraction technique applied, showed a considerable growth inhibition on Candida albicans and Saccharo-myces cerevisiae, while no growth inhibition zones were observed for Aspergillus niger. The diameters of inhibition zone observed for all the microorganisms were larger for extracts obtained by classical extraction than those by ul-trasound extraction.Antioxidant and antimicrobial activities of Echinacea purpurea L. （Asteraceae） extracts obtained by classical and ultrasound solvent extraction were compared. The dry aerial part of plant was extracted by 70% etha-nol at a solid-to-liquid ratio of 1︰10 （m/v） and 25°C. The extract obtained by classical solvent extraction contained 29% larger amounts of phenolic compounds and 20% higher content of flavonoids. 2,2-diphenyl-1-picril hydrazyl radical （DPPH） scavenging reached 93.6% and the values of EC50 were （34.16±0.65） μg·ml-1 and （65.48±1.12） μg·ml-1 for the extracts obtained by the classical and ultrasound extractions, respectively. The extracts, independent of the extraction technique applied, showed a considerable growth inhibition on Candida albicans and Saccharo-myces cerevisiae, while no growth inhibition zones were observed for Aspergillus niger. The diameters of inhibition zone observed for all the microorganisms were larger for extracts obtained by classical extraction than those by ul-trasound extraction.

关 键 词：antioxidant activity antimicrobial activity Echinaceapurpurea L. total phenols FLAVONOIDS extraction 

分 类 号：R285[医药卫生—中药学]