摘要
评价巴西蕉花蕾不同部位的化学组成和乙醇提取物的抗氧化活性。结果表明:3个部位中花的总黄酮含量最高(5.9mg/100g),苞片的总酚含量最高(14.91mg/g),生长点的皂苷含量最高(14.77mg/100g)。3部位提取物均具有一定的清除DPPH自由基、ABTS+自由基、还原力和脂质过氧化抑制作用,且清除率和质量浓度间存在剂量依赖关系。其中,苞片具有最强的清除DPPH自由基、ABTS+·、还原力和抑制脂质过氧化的作用,生长点次之;3部位乙醇提取物的还原力均比没食子酸强。
The 70% ethanol extracts from three different tissues of banana (Musa AAA Cavendish subgroup cv.Brazil) inflorescence including petal,bract and growth point were assessed for their free radical scavenging and anti-lipid peroxidation activities and reducing power.Among the three tissues of banana inflorescence,the highest contents of total flavonoids (5.9 mg/100 g),total phenolics (14.91 mg/g) and saponins (14.77 mg/100 g) were found in petals,bracts and growth points,respectively.All the extracts from them could scavenge DPPH and ABTS^+ free radicals and protect against lipid peroxidation and had pronounced reducing power in a concentration-dependent fashion and the extract from banana bracts had the strongest ability to scavenge DPPH and ABTS^+ free radicals and reducing power and anti-lipid peroxidation activity,followed by that from banana growth points.Furthermore,compared with galic acid,all the extracts from banana petal,bract and growth point presented higher reducing power.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2010年第17期98-102,共5页
Food Science
基金
海南省自然科学基金项目(309043)
农业部"948"项目(2010-Z7)
2010年农业部南亚办热作专项
中央级科研院所基本科研业务费重点项目(ITBBKF2008-2)
关键词
巴西蕉
花蕾
化学组成
提取物
抗氧化
Musa AAA Cavendish subgroup cv.Brazil
inflorescence
chemical composition
extract
antioxidation