The dynamic changes and mechanisms of Rehmanniae radix processing based on Maillard reaction  

作　　者：Xiang-Long Meng Bo Wang Xiao-Yan Zhang Chen-Zi Lyu Xiao-Juan Su Chen-Xu Ning Shuo-Sheng Zhang 

机构地区：[1]College of Chinese Materia Medica,Shanxi University of Chinese Medicine,Jinzhong 030619,Shanxi,China [2]Department of Herbology,College of Korean Medicine,Dongguk University,Gyeongju 38066,Korea

出　　处：《Traditional Medicine Research》2021年第1期63-73,共11页TMR传统医学研究

基　　金：This research was funded by General Project of the National Natural Science Foundation of China(No.81673601);the Key Research&Development Plan of Shanxi Province(Social Development Project,No.201603D3112002);Cultivate Scientific Research Excellence Programs of Higher Education Institutions in Shanxi(No.2019KJ032).

摘　　要：Background:Traditional Chinese medicines are usually processed before they are used for clinical treatment.This is done in a way associated with the Maillard reaction.Methods:Based on the Maillard reaction,this paper analyzed the degree of processing of rehmannia root(Rehmanniae radix)relative to the dynamic variation rules of Maillard reaction index parameters,including pH,A420,amino acids,and 5-hydroxymethylfurfural.Furthermore,this study introduced thermal analysis techniques and pyrolysis kinetics to assess the influence of the correlation between processing raw rehmannia root and the Maillard reaction during carbonization.It then went through the whole process of transforming the raw material to end-product in order to explain the scientific connotation of processing it.Results:The results showed that each time rehmannia root was processed,its pH value and amino acid content decreased,while the A420 value and 5-HMF increased.Processing with wine shows a significant difference in these experimental indexes.The position and intensity of the maximum thermal weight loss rate peak of processed rehmannia root at different degrees of processing are different.Comprehensive quantitative 221±0.2°C for processed rehmannia root carbonization was the processing temperature limit.Moreover,the kinetic solution verified that the activation energy corresponding to the carbonization temperature was close to the maximum value of the activation energy of the whole carbonization process,and the optimal mechanism function was g(α)=((1−α)−1/3−1)2.Conclusion:The Maillard reaction occurred during the processing of rehmannia root mixed with carbonization.With each increase of the number of steaming and drying cycles involved in the processing,the level of Maillard reaction increased significantly.The wine-steaming method had a significant effect on the quality of the processed product.

关 键 词：Processing of traditional Chinese medicine Maillard reaction Radix Rehmanniae Praeparata Rehmannia root THERMOANALYSIS Pyrolysis kinetics 

分 类 号：O62[理学—有机化学]