| Summary: | 碩士 === 嘉南藥理大學 === 化粧品應用與管理系 === 106 === Cymbopogon martinii belonging to the family Poaceae, belonging to the family Poaceae.Different extraction methods can affect the composition of essential oils, further affect the biological activity.Thus,this study extrated
essential oils from Cymbopogon martinii leaf by steam distillation (SD) and solvent-free microwave extraction(SFME) and evaluated anti-bacterial,antioxidant,anti-inflammatory,and whitening characteristics of the oils.In addition,the effects of citronellal,citronellol,nerol and geraniol on the biological activity were compared.
The results showed that the main constituents of SFME oil were citronellal (36.14%), geraniol (17.04%), citronellol (10.38%);the main components of SD oil were citronellal (22.36%), nerol (20.66%), citronellol (13.03%) by gas chromatography-mass spectrometry (GC-MS).
In the antibacterial test, antibacterial effect of SD essential oil was better than SFME essential oil against S. aureus.
In the anti-inflammatorry test, NO radical scavenging ability and 5-LOX inhibition test showed that SD essential oil was better than SFME essential oil.
In the antioxidant test scavenging DPPH free radicals results showed that SFME essential oil was better than SD essential oil.While β-carotene-linoleic acid bleaching test showed that there was no significant difference between the two essential oil.
In the whitening test, tyrosine inhibition test showed that SFME essential oil was better than SD essential oil.
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