• 工艺技术 •

果胶多糖水热法降解及其产物体外抗氧化性评价

1. 1.南京林业大学 林业资源高效加工利用协同创新中心，江苏 南京 210037；2.南京林业大学化学工程学院，江苏 南京 210037
• 出版日期:2019-06-25 发布日期:2019-06-28
• 基金资助:
“十三五”国家重点研发计划重点专项（2016YFD0600803）

Degradation of Pectic Polysaccharide by Hydrothermal Treatment and Antioxidant Activity in Vitro of the Resulting Products

JIANG Meiyun1,2, TANG Shuo2, WANG Ting2, LAI Chenhuan1,2, FAN Yimin1,2, YONG Qiang1,2,*

1. 1. Collaborative Innovation Center for Efficient Utilization of Forestry Resources, Nanjing Forestry University, Nanjing 210037, China; 2. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
• Online:2019-06-25 Published:2019-06-28

Abstract: In this work, hydrothermal treatment was carried out on a commercial pectic polysaccharide, and the antioxidant activities of the degradation products were investigated. The results showed that the optimal degradation conditions were found to be treatment at 140 ℃ and pH 6 for 30 min. Under these conditions, the efficiency of degradation was 46.2%. On this basis, the degradation products were fractionated by ethanol precipitation into three fractions (S1, S2 and S3). The weight average molecular masses of S1, S2 and S3 were 13.4, 7.5 and 5.7 kDa, respectively. The antioxidant activities of the pectic polysaccharide and the three degradation products were evaluated. The results showed that the 1,1-diphenyl-2- picrylhydrazyl (DPPH) radical scavenging rate of S1 was 49.8%, which was 4 times as high as that of the pectin, while the superoxide anion scavenging rate of S3 was 58.7%, which was 10 times as high as that of the pectin. These results indicated that the hydrothermal degradation of pectic polysaccharides could significantly improve its antioxidant activity. This study provides a theoretical basis for the efficient utilization of pomace wastes.