한국산 감초 추출물 함유 크림의 안정성 평가 = A Study on the Stability of the Cream Containing Glycyrrhiza uralensis Extract

다국어 초록 (Multilingual Abstract)

In this study, The stability of a cream containing the ethyl acetate fraction of 50% ethanol extracts from Glycyrrhiza uralensis (G. uralensis) cultured in Korea was investigated. pH, absorbance, viscosity and color difference of the cream containing 0.20% ethyl acetate fraction of the aforementioned G. uralensis extracts were measured under 4 different temperature conditions (4 ℃ 25 ℃ 37 ℃ and 45 ℃) and under the sun light at 2 week intervals for 12 weeks. pH changes of a control cream without the extracts and the sample cream containing 0.20% ethyl acetate fraction of G. uralensis extracts were 0.66 and 0.44, respectively. There were no significant pH differences between the sample and the control under the sun. Viscosities of the control cream and the sample cream decreased by 2,483 cPs and 2,893 cPs respectively. So, the sample cream showed a bigger decline (410 cP) in viscosity than the control cream. The ethyl acetate fraction of G. uralensis extracts did not affect the stability of the cream. Absorbance of ethanol solution of the ethyl acetate fraction decreased 30.00% at 276 nm under the sun. On the other hand, the absorbance of the sample cream containing the ethyl acetate fraction decreased 12.02%. The stability of the G. uralensis extracts was better in cream formulation than in ethanol solution. The total color differences of all creams increased slightly during the study period under various conditions. The results appeared to indicate the color stability of the cream containing 0.20% ethyl acetate fraction of G. uralensis extracts. It is suggested that further study is needed to provide more information to the manufacturers who are seeking for the application of the G. uralensis extracts to improve the anti-oxidant and stability of cosmetic products.

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