甘蔗提取物的抗氧化性能(英文)

Antioxidant Properties of Sugarcane Extracts

膳食中的抗氧化剂有助于保护人体组织和细胞免受自由基的危害.目前,已有多种天然提取物制剂被用作膳食补充剂.文中比较了美国零售市场中4种甘蔗制品和1种玉米浆制品的组成和抗氧化能力,发现5种制品的抗氧化能力均与颜色密切相关.通过分析经不同澄清工艺并经真空浓缩的两种甘蔗汁的抗氧化能力,发现石灰澄清和纯碱澄清均不会造成抗氧化能力的显著降低.文中还对不同方法脱色后制品的抗氧化能力进行了比较.

Dietary antioxidants help to protect tissues and cells against the harmful effects of free radicals. At present, numerous preparations extracted from natural sources are available to the public as dietary supplements. In this paper, four sugarcane-based products and one corn liquor-based product on the USA market are selected and characterized by their composition and antioxidant capacity. It is found that the antioxidant capacity of the five products correlates very well with their color. Sugarcane juice clarified with two different proce- dures and concentrated under vacuum are then analyzed in terms of antioxidant capacity. The results show that neither the lime nor the soda ash clarification measurably reduces the antioxidant capacity. The effects of different separation methods for colorants on the antioxidant capacity are finally analyzed.