Mohamed Refaei, Pineda Manuel, Aguilar Miguel
Dept. de Bioquímica y Biología Molecular, Univ. de Córdoba. Campus de Rabanales, Spain.
J Food Sci. 2007 Jan;72(1):S059-63. doi: 10.1111/j.1750-3841.2006.00207.x.
There is an increasing demand for natural antioxidants to replace synthetic additives in the food industry. The present work examines the potential of some wild and cultivated plants from the Mediterranean region as sources of natural antioxidants. Samples of different organs and tissues from each of these species were extracted with aqueous and organic solvents and analyzed for their total hydrosoluble and lipid-soluble antioxidant capacity, measured by the phosphomolybdenum method, and for their content in tocopherols. Our results demonstrate that there is more than a 1000-fold difference among total antioxidants in various plant sources. The highest level of water-soluble antioxidant capacity was found in fruit peel and leaf samples, while seeds presented the highest levels of lipid-soluble antioxidant capacity. Tocopherols were more abundant in leaf samples. Holm oak and olive tree leaves showed the highest yields of alpha-tocopherol. These Mediterranean plant species could be used as a very good source of both water-soluble and lipid-soluble antioxidants, particularly alpha-tocopherol.
食品工业对天然抗氧化剂替代合成添加剂的需求日益增加。目前的研究考察了地中海地区一些野生和栽培植物作为天然抗氧化剂来源的潜力。从这些物种的每一种中采集不同器官和组织的样本，用有机溶剂和水溶液进行提取，并分析其总水溶性和脂溶性抗氧化能力（通过磷钼酸法测定）以及生育酚含量。我们的结果表明，不同植物来源的总抗氧化剂之间存在1000倍以上的差异。在果皮和叶片样本中发现了最高水平的水溶性抗氧化能力，而种子的脂溶性抗氧化能力水平最高。叶片样本中的生育酚含量更为丰富。圣栎和橄榄树叶片的α-生育酚产量最高。这些地中海植物物种可作为水溶性和脂溶性抗氧化剂（尤其是α-生育酚）的优质来源。
