连翘精油抑菌及抗氧化作用研究

Study on the Anti-oxidation and Bacteriostasis of Forsythia suspense Essential Oil

利用超临界CO2萃取法提取连翘精油，研究测定了连翘精油对各种供试菌种的抑菌圈直径，加热处理及pH值对连翘精油抑菌效果的影响，同时研究了连翘精油的抗氧化效果。结果表明：连翘精油对各供试菌种的抑菌圈直径在12．5--26．0mm之间，对G^＋和G^-细菌、霉菌和酵母均有很强的抑制作用；连翘精油的抑菌效果随pH值的降低而增强；121℃加热处理15min对连翘精油的抑菌效果无明显影响；连翘精油还具有一定的抗氧化性能。

The diameter of inhibition cycle of the Forsythia suspense essential oil, extracted by Supercritical carbon dioxide extraction （SCDE） technique, on various bacteria was studied. The effects of temperature and pH value on the bacteriostasis of this essential oil were also investigated. The results showed that, the inhibition cycle diameters of this essential oil on mold, yeast, G＋ and G bacteria were range from 12.5 to 26.0mm, i.e. the essential oil had strong bacteriostatic functions on the tested bacteria. The lower the pH value, the higher the bacteriostatic of the essential oil. Heating treatment （121℃ for 15 minutes） had little effect on its bacteriostasis. Results also showed that the oil had anti-oxidation effect.