KSBB Journal
- Volume 7 Issue 2
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- Pages.118-125
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- 1992
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- 1225-7117(pISSN)
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- 2288-8268(eISSN)
Growth of Pseudomonas aeruginosa in Cosmetics(Emulsion-type) and the Effect of Antiseptics
화장품(에멀젼형)에서 Pseudomonas aeruginosa의 성장과 방부살균제효과
Abstract
Most of cosmetics are emulsion-type products which contain the sources of nutrition, i.e., vegetable oil, mineral oil and carbohyrate etc.. These additives are usually very susceptible to the contamination by microorganisms. The purpose of this study is to obtain the data necessary not only to prevent dermalopathia occurred by microbials but also to maintain the quality. In this experiment we observed the growth of P.aeruginosa in the cosmetics with or without antiseptics so as to prevent contamination. During the contamination period, the phase became unstable and creaming phenomina was happened together with some discoloration and bad smell. The pH of cosmetic was decreased from 7.6 to 6.0 and the concentration was increased from 1.443 to 1.453 in terms of refractive index during 40 days incubation. By adding antiseptics to the cosmetics, the number of P. aeruginosa from the challenge test method were decreased from
1.에멀젼형 화장품시료의 오염정도는 P. aeruginosa의 증식을 촉진하는 fatty acids, waxs, oils, steroids 등의 유기물에 의존하였다. 2. 오염의 결과, 물성의 변화로서 화장품시료의 pH가 40일 경과시 7.6에서 6.0으로 변화되었다. P. aeruginosa의 영양원으로서는 상대적으로 낮은 굴절률을 갖는 물질들이 소모되어 화장품시료(물:오일=70:30)의 굴절률이 1.4430에서 1.4530으로 변화 되었다. 3. 오염이 진행되는 동안 화장품시료의 相의 안정서이 파괴되었으며, 약간의 변색, 변취와 함께 creaming 및 응집현상이 나타났다. 4. P. aeruginosa의 최적증식조건인 pH7.0, 온도
Keywords