원문정보
초록
영어
Grapefruit Seed Extract (GSE), thyme and lemongrass Oil have been well known as natural materials with its distinguished antimicrobial activities. In this study, antifungal and antimicrobial
susceptibility of methyl paraben and propyl paraben, which are both synthetic and common cosmetic food grade preservatives, and also that of natural preservatives were tested. From the results of test with liquid culture medium revealed that GSE had the highest antimicrobial effect
with Minimum Inhibitory Concentration (MIC) value and Minimum Bactericidal Concentration
value, and that thyme and lemongrass had similar range of inhibitory concentration. It was confirmed that all natural materials had high antimicrobial activity, and based on this test result, relevant cosmetics were made and the possibility of a preservative was tested accordingly. Also, we tested preservative activity of the mixture of essential oil, it was unable to confirm the synergic effects caused by mixture use. And it showed similar results to the antimicrobial activity of essential oil alone. In consequence, it was concluded that GSE, thyme and lemongrass oil could replace existing synthetic preservative effectively.