天津农学院学报 ›› 2024, Vol. 31 ›› Issue (6): 64-74.doi: 10.19640/j.cnki.jtau.2024.06.011

• 研究与简报 • 上一篇    下一篇

干、鲜银耳粗多糖提取工艺优化及抗氧化活性研究

代瀚哲, 董心宜, 章文昕, 陆子亢, 张平平通讯作者   

  1. 天津农学院 食品科学与生物工程学院,天津 300392
  • 收稿日期:2024-04-01 出版日期:2024-12-31 发布日期:2024-12-31
  • 通讯作者: 张平平(1970—),女,教授,博士,研究方向:农产品精深加工、植物活性物质研究及产品开发。E-mail:zpp613@163.com。
  • 作者简介:代瀚哲(1998—),男,硕士在读,研究方向:食品加工与安全。E-mail:2765142653@qq.com。

Optimization of extraction process and antioxidant activity of crude polysaccharide from dried and fresh Tremella Fuciformis

Dai Hanzhe, Dong Xinyi, Zhang Wenxin, Lu Zikang, Zhang PingpingCorresponding Author   

  1. College of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin 300392, China
  • Received:2024-04-01 Online:2024-12-31 Published:2024-12-31

摘要: 以干、鲜银耳为原料,分别提取银耳粗多糖,通过单因素及响应面试验,对多糖浸提工艺和抗氧化活性进行比较。结果表明,干银耳粗多糖的最佳浸提条件为料水比1:49(g:mL),浸提温度71 ℃,浸提时间3 h,超声时间40 min,粗多糖浸提率为(20.07±0.43)%;鲜银耳粗多糖的最佳浸提条件为料水比1:32(g:mL),浸提温度71 ℃,浸提时间4 h,超声时间40 min,粗多糖浸提率为(44.13±0.79)%;干银耳的粗多糖浸提率仅为鲜银耳的45.48%。测定干、鲜银耳粗多糖的超氧阴离子、羟基自由基清除率,其IC50分别为5.12、4.01和3.59、3.63 mg/mL,质量浓度为5 mg/mL时,干、鲜银耳粗多糖的铁离子还原力分别为0.36和0.51;两种粗多糖的抗氧化活性均随质量浓度升高而增加,且鲜银耳粗多糖的抗氧化活性要高于干银耳粗多糖。

关键词: 银耳, 多糖, 提取, 抗氧化活性

Abstract: The crude polysaccharides of Tremella fuciformis were extracted from dried and fresh Tremella fuciformis, and the extraction technology and antioxidant activity were compared by single factor and response surface tests. The results showed that the optimal extraction conditions of crude polysaccharide from dried tremella fuciformis were as follows: ratio of solid to liquid 1:49(g:mL), extraction temperature 71 ℃, extraction time 3 h, and ultrasonic time 40 min. The extraction rate of crude polysaccharide was(20.07±0.43)%; the optimal extraction conditions of crude polysaccharide from fresh Tremella fuciformis were as follows: ratio of solid to liquid 1:32(g: mL), extraction temperature 71 ℃, extraction time 4 h, ultrasonic time 40 min, and extraction rate of crude polysaccharide was(44.13±0.79)%. The extraction rate of crude polysaccharide from dried Tremella fuciformis was only 45.48% of that from fresh Tremella fuciformis. The superoxide anion and hydroxyl radical scavenging rates of crude polysaccharides from dried and fresh Tremella fuciformis were measured. The IC50 values were 5.12, 4.01, 3.59, and 3.63 mg/mL, respectively. At the mass concentration of 5 mg/mL, the FRAP values of crude polysaccharides from dried and fresh Tremella fuciformis were 0.36 and 0.51, respectively. The antioxidant activity of the two crude polysaccharides increased with the increase of mass concentration, and the antioxidant activity of crude polysaccharides from fresh Tremella fuciformis was higher than that from dried Tremella fuciformis.

Key words: Tremella fuciformis, polysaccharides, extraction, antioxidant activity

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