| 酸降解水溶性银耳多糖及抗氧化作用研究 |
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| 引用本文： | 吴 琼,代永刚,高长城,宁正祥.酸降解水溶性银耳多糖及抗氧化作用研究[J].食品科学,2009,30(13):93-96. |
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| 作者姓名： | 吴 琼 代永刚 高长城 宁正祥 |
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| 作者单位： | 1.长春大学农产品加工重点实验室 2.吉林省农业科学院农产品加工研究中心 3.华南理工大学轻工与食品学院 |
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| 摘 要： | 采用盐酸降解法对水溶性银耳多糖进行降解，得到低分子水溶性银耳多糖。通过对DPPH 自由基清除作用，表征低分子水溶性银耳多糖抗氧化活性的变化。当溶液黏度为16.5～9.8mPa·s 时，低分子银耳多糖的平均相对分子质量在2～10kD 范围内，抗氧化活性高于水溶性银耳多糖。而当平均相对分子质量＞ 10kD 或平均相对分子质量＜ 2kD 时，抗氧化活性较低。
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| 关 键 词： | 银耳多糖 降解 抗氧化 |
| 收稿时间： | 2008-10-09 |
Antioxidations of Acid-degrade Water-soluble Polysaccharides from Tremella fuciformis |
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| WU Qiong,DAI Yong-gang,GAO Chang-cheng,NING Zheng-xiang.Antioxidations of Acid-degrade Water-soluble Polysaccharides from Tremella fuciformis[J].Food Science,2009,30(13):93-96. |
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| Authors: | WU Qiong DAI Yong-gang GAO Chang-cheng NING Zheng-xiang |
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| Affiliation: | 1. Key Laboratory of Agricultural Products Processing, Changchun University, Changchun 130022, China；
2. Research Center of Agricultural Products Processing, Jilin Academy of Agricultural Sciences, Changchun 130033, China；
3. College of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | The water-soluble polysaccharides extracted from Tremella fuciformis were degraded into low-molecular-weight polysaccharides using hydrochloric acid under different conditions. Then the antioxidant effects of the low-molecular-weight Tremella fuciformis polysaccharides (LTPs) obtained were investigated via the determination of DPPH radical scavenging activity in vitro. The results indicated that after the degradation in 0.1 mol/L hydrochloric acid solution at 50 ℃ for 0.5－3 h, the viscosity of the initial polysaccharides solution declined gradually from 17.8 mPa · s to 16.5－9.8 mPa · s, and the average molecular weights (MWs) of the LTPs were within the range of 2－10 kD and their antioxidant activity was higher than that of the undegraded water-soluble Tremella fuciformis polysaccharides . However, the LTPs with the average MW of higher than 10 kD or less than 2 kD, had weak antioxidant activity. |
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| Keywords: | Tremella polysaccharide degradation antioxidation |
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