Department of Pharmacy, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
J Sci Food Agric. 2010 Dec;90(15):2682-8. doi: 10.1002/jsfa.4140.
Plant essential oils are widely used as fragrances and flavours. Therefore, the essential oils from the leaves of Cinnamomum pubescens Kochummen (CP) and the whole plant of Etlingera elatior (EE) were investigated for their antioxidant, antibacterial and phytochemical properties.
CP and EE were found to contain appreciable levels of total phenolic contents (50.6 and 33.41 g kg(-1) as gallic acid equivalent) and total flavonoid contents (205.6 and 244.8 g kg(-1) as rutin equivalent), respectively. DPPH free radical scavenging activity of CP is superior to EE (P < 0.05) showing IC(50) of 77.2 and 995.1 µg mL(-1), respectively. Methicillin-resistant Staphylococcus aureus (MRSA), Bacillus subtilis, Pseudomonas aeruginosa and Salmonella choleraesuis were tested against CP and EE. Only MRSA was the most susceptible bacteria to CP. GC/MS studies resulted in the identification of 79 and 73 compounds in CP and EE, respectively. The most abundant components of EE included β-pinene (24.92%) and 1-dodecene (24.31%). While the major compound in CP were 1,6-octadien-3-ol,3,7-dimethyl (11.55%), cinnamaldehyde (56.15%) and 1-phenyl-propane-2,2-diol diethanoate (11.38%).
This study suggests that the essential oils from Cinnamomum pubescens Kochummen and Etlingera elatior could be potentially used as a new source of natural antioxidant and antibacterial in the food and pharmaceutical industries.
植物精油被广泛用作香料和调味剂。因此，研究了肉桂叶（CP）和艳山姜（EE）的精油的抗氧化、抗菌和植物化学特性。
CP 和 EE 分别含有相当高的总酚含量（50.6 和 33.41 g kg(-1) 以没食子酸当量）和总黄酮含量（205.6 和 244.8 g kg(-1) 以芦丁当量）。CP 的 DPPH 自由基清除活性优于 EE（P < 0.05），IC(50)分别为 77.2 和 995.1 µg mL(-1)。耐甲氧西林金黄色葡萄球菌（MRSA）、枯草芽孢杆菌、铜绿假单胞菌和肠炎沙门氏菌被测试了对 CP 和 EE 的敏感性。只有 MRSA 是对 CP 最敏感的细菌。GC/MS 研究结果分别在 CP 和 EE 中鉴定出 79 和 73 种化合物。EE 中含量最丰富的成分包括β-蒎烯（24.92%）和 1-十二烯（24.31%）。而 CP 的主要化合物为 1,6-辛二烯-3-醇，3,7-二甲基（11.55%）、肉桂醛（56.15%）和 1-苯基-丙烷-2,2-二醇二乙酯（11.38%）。
本研究表明，肉桂叶和艳山姜的精油可能是食品和制药行业中天然抗氧化剂和抗菌剂的新来源。
