摘要
以树莓为试验材料,采用自然干燥、红外干燥、热风恒温干燥和真空冷冻干燥4种干燥方式处理树莓,超声波辅助提取法提取树莓样品中的总酚和总黄酮含量,体外DPPH·和ABTS^+·的清除能力,拓展树莓加工产品方式,提高树莓干燥效率和品质。结果表明:干燥处理后样品中总酚、总黄酮含量及对ABTS^+·和DPPH·清除能力不同程度降低,其中真空冷冻干燥样品总酚和总黄酮含量损失最少,分别为(2.47±0.29)mg·g^-1和(2.06±0.61)mg·g^-1,ABTS^+·和DPPH·清除能力最大,其IC50分别为(4.53±0.04)mg·mL^-1和(5.17±0.12)mg·mL^-1;真空冷冻干燥方式最适宜于树莓的干燥。
In order to explore the effects of different drying methods on the quality of raspberries,the contents of total polyphenols,flavonoids and antioxidant activity of different drying methods were explored.Ultrasonic-assisted extraction of total polyphenols,flavonoids from the four different drying methods including nature sun drying,hot-air drying,infrared radiation drying and vacuum-freeze drying was evaluated.In addition,the DPPH· and ABTS^+· scavenging capacity of the dried Rubus corchorifolius L. were also determined.The results showed that the contents of total polyphenols and flavonoids in vacuum freeze drying were the highest,which was(2.47±0.29)mg·g^-1 and(2.06±0.61)mg·g^-1 in vacuum freeze drying,respectively.The dry methods could reduce the DPPH· and ABTS^+· scavenging capacity.DPPH· and ABTS^+· half inhibitory concentration IC50 of the vacuum freeze drying Rubus corchorifolius L. were(4.53±0.04)mg·mL^-1 and(5.17±0.12)mg·mL^-1,respectively.Based on these results,vacuum freeze drying maybe the most suitable method for preserving polyphenols,flavonoids and antioxidant activity in Rubus corchorifolius L..
作者
陈青
王玉珠
梁延群
王小文
王红妹
张立华
CHEN Qing;WANG Yuzhu;LIANG Yanqun;WANG Xiaowen;WANG Hongmei;ZHANG Lihua(College of Life Sciences,Zaozhuang University,Zaozhuang,Shandong 277160)
出处
《北方园艺》
CAS
北大核心
2019年第13期130-134,共5页
Northern Horticulture
基金
国家自然科学基金资助项目(31600080)
山东省自然科学基金资助项目(ZR2016CB29)
山东省重点研发计划资助项目(公益性科技攻关类)(2017GSF21118)
关键词
树莓
干燥方法
超声波辅助提取
抗氧化能力
Rubus corchorifolius L.
drying method
ultrasonic-assisted extraction
antioxidant activity
