tailieunhanh - Nghiên cứu đặc tính kháng khuẩn của tinh dầu tràm trà và khả năng ứng dụng trong mỹ phẩm

Bài viết tìm ra tối thiểu có sẵn liều của tinh dầu trong thực tế sử dụng mà các hoạt động kháng khuẩn có thể được giữ lại. Bên cạnh đó điều quan trọng là chỉ ra khả năng sử dụng các phần khác nhau của tinh dầu cho mục đích kháng khuẩn. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 11, SOÁ 08 - 2008 STUDY ON THE ANTIBACTERIAN CHARACTERISTICS OF TEA TREE OIL AND ITS APPLICATION IN COSMETICS Phan Dinh Tuan, Hoang Minh Nam, Nguyen Thi Thanh Nga University of Technology, VNU-HCM Tea trees have been widely planted in the Mekong River Delta area of Vietnam. The investigation has pointed out that its essential oil composition is of about 2% by weight. The essential oil could be easily recovered and purified by steam distillation followed by fractional one [9]. It has been reported that tea tree oil has rather high antibacterial activity [9,12,14,17,18] for its high composition of terpinen-4-ol. Nevertheless, it has been found that not only terpinen-4-ol but also other components have the activity. It is necessary to find out the available minimum dose of the essential oil in practical use that the antibacterial activity could be retained. Besides, it is important to point out the available ability to use different fractions of the essential oil for antibacterial purpose. AND METHODS The original tea tree essential oil is recovered and fractionally distillated from the tea trees planted in the Mekong River Delta area of Vietnam. From these fractions, initial essential oil has been prepared by simple mixing the fractions of 0% and 98% terpinen-4-ol to receive the mixtures of about 25%, 50%, 75% and 90% terpinen-4-ol. Escherichia coli and Staphylococcus aureus microorganisms are supplied by the Department of Biotechnology of Hochiminh City University of Technology. Pseudomonas aeruginosa and Candida albicans are supplied by the Pasteur Institute at Hochiminh City. Antibacterial activity of the essential oil, its distilled fractions or of essential oil based cosmetics are determined by the method of diffusion well (hole boring) and the method of microorganism counting. In the case of cosmetic products, the method of microorganism counting is .