Extraction Yields of Hizikia fusiforme by Solvents and Their Antimicrobial Effects

Abstract

Extraction yields of Hizikia fusiforme with four kinds of solvents and ethanol solutions, and antimicrobial activities of the extracts against Escherichia coli, Bacillus subtilis, Saccharomyces cerevisiae and Alternaria sp. were investigated. Determination of extraction yield with several solvents showed the highest value, (wt/wt), when distilled water was used. However, the extraction yields by hexane, ethyl ether and ethanol were less than (wt/wt). When dried Hizikia fusiforme was extracted at various concentrations of ethanol, 0 to solution gave similar yields and the extraction yields decreased rapidly as the ethanol concentrations increased above , Ethanol-extract demonstrated antimicrobial activities against E. coli and B. subtilis, and ethyl ether- and hexane-extracts against E. coli. 70 and ethanol-extracts had potent antimicrobial activities against E. coli, and B. subtilis.