摘要
对橄榄果实中的总酚含量与可溶缩合单宁含量进行了测定,并利用二苯基苦基苯肼自由基(DPPH)和铁离子还原/抗氧化能力测定(FRAP)法,研究了橄榄果实中单宁的自由基清除能力及抗氧化活性。结果表明:橄榄果实中总酚含量较高[(572.35±39.72)mg/g(干重)],用正丁醇-HCl法测得缩合单宁的含量为(1.47±0.02)mg/g(干重),用DPPH法和FRAP法研究其自由基清除能力及抗氧化活性表明,橄榄果实单宁具有较高的自由基清除能力(IC_(50)为48.45μg/mL),及较强的抗氧化能力(2.955 mmol AAE/g)。
Total phenolics and extractable condensed tannins contents of Canarium album Lour. Rauesch. fruits were determined. In addition, the effects of tannins from C. album fruits on free radical-scavenging and antioxidant activity were determined by using 1,1-diphenyl-2-picryhydrazyl （DPPH） radical scavenging activity and ferric reducing/antioxidant power （FRAP） model systems. The results showed as follows, total phenolics and extractable condensed tannins were 572.35 ± 39.72 mg/g and 1.47 ± 0.02 mg/g respectively tannins extracted from C. album fruits showed a very good DPPH radical scavenging activity （IC50 of 48.45 μg/mL） and ferric reducing/antioxidant power （2. 955 mmol/L AAE/g ）. The DPPH radical scavenging activities were well proved with the ferric reducing/antioxidant capacity of the studied tannins.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2008年第7期24-27,共4页
Food and Fermentation Industries
基金
国家自然科学基金(40376026，30671646)
