Fruit flavanoids: structure modification, antioxidant properties and mode of action in food and biological model systems

加拿大拥有可持续的农业生物资源供应，其中不仅包括各种农产品，还包括农业生产和加工过程中产生的未充分利用的生物废物。世界卫生组织强调了不断变化的世界疾病概况。在北美，与氧化应激相关的慢性疾病流行病正面临着重大挑战，这些疾病与饮食和环境直接或间接相关。因此，通过改变饮食进行化学预防，即增加水果和蔬菜的消费以及使用从水果和蔬菜中提取的新型食品成分，对于帮助管理当前和新出现的卫生保健挑战将是重要的。具有抗氧化和细胞信号调节特性的天然植物化合物，如多酚、三萜和类胡萝卜素，现在被科学界广泛认为是水果中的主要成分，除了基本的营养功能外，还提供特定的健康益处。

Canada has a sustainable supply of agricultural bio-resources, which include not only diverse agricultural commodities but also under-utilized bio-waste generated through agricultural production and processing. The World Health Organization has highlighted a changing world disease profile. In North America, significant challenges are being faced from oxidative stress-linked chronic disease epidemics, which are directly or indirectly linked to diet and the environment. Therefore, chemoprevention through diet modification, i.e. increased consumption of fruits and vegetables as well as the use of novel food ingredients derived from fruits and vegetables, will be important in helping to manage the current and emerging health care challenges. Natural plant compounds with antioxidant and cell signaling modulating properties, such as polyphenolics, triterpenes, and carotenoids, are now widely thought by the scientific community to be the principle components in fruits that provide specific health benefits beyond the basic nutritional functions.