earticle

영어

Goal of this study is to evaluate the suitability of peach leaf as a raw material for natural cosmetics based on specific functions that are antioxidative activity, antibacterial activity, and tyrosinase inhibition. The antioxidative activity was determined based on DPPH-scavenging effect and the antibacterial activity was measured based on inhibition effect of bacterial community isolated from face skin of 4 women. The peach leaf was grinded using ball meal for improving extraction efficiency. Triply distilled (highly pure) water or 99.9% ethanol was used as a solvent for extraction of functional compounds from ground peach leaf. Dry weight of the extract was not quantitatively determined but functional efficiency of the extract was evaluated based on ratio of the peach leaf weight to the solvent volume. The ratio of peach leaf weight to solvent volume was adjusted to 20 g to 1,000 mL, which was employed as a criterion to determine functional activity of the extract. Ten times-diluted peach leaf extract was employed to determine the DPPH-scavenging activity and the tyrosinase inhibition activity; however, the peach leaf extract was not diluted to determine antibacterial activity. Functional activity was the mean value of results obtained from triply repeated tests. The DPPH-scavenging activity of the water-extracted and the ethanol-extracted peach leaf was approximate 57.5% and 68.0%, respectively; meanwhile, the tyrosinase inhibition activity of the water-extracted and the ethanol-extracted peach leaf was approximate 52.5% and 41.9%, respectively. Differences between the water-extracted and the ethanol-extracted peach leaf for antioxidative, tyrosinase inhibition, and antibacterial activity was approximate 15%, 20%, and 10%, respectively. Conclusively, the functional activity contained in the peach leaf is considered to be suitable as a raw material for the natural cosmetics.