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| 摘要: |
| 通过正交试验确定了苹果渣多酚化合物提取的优化工艺条件，并对提取物的抗氧化性进行了研究。结果表明：乙醇浓度、超声功率和提取时间对提取效果影响显著，其优化工艺条件为乙醇浓度70%，超声功率225 W，提取时间20 min。苹果渣多酚提取物对羟自由基（·OH）的清除能力与脂质过氧化的抑制作用测定结果表明，苹果渣多酚提取物对清除羟自由基和抑制脂质过氧化均有较强的作用，清除率和抑制率分别达到91.1%和93.4%。 |
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| 基金项目:陕西省“十五”攻关项目（2001K04-G10-02）；陕西省农业重点技术推广项目（20011-3-16） |
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| Study on ultrasonic extraction of polyphenols in apple pomace and its antioxidational effects |
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| Abstract: |
| The optimal conditions of polyphenol extraction from apple pomace were identified by using orthogonal test.The results showed that the alcohol concentration,ultrasonic power,and ultrasonic treatment time had significant effects on polyphenol extraction,and the optimizing conditions were 70% alcohol concentration,225 W ultrasonic power,and 20 minutes of ultrasonic treatment time.Both the clearing capacity of polyphenol extract from apple pomace for hydroxyl radical and its inhibitory effect on lipid oxidation were very significant,and the clearing capacity and inhibitory rate were 91.1% and 93.4% respectively. |
| Key words: apple pomace ultrasonic treatment polyphenols antioxidation |
