DBD等离子体分解半胱氨酸和N-乙酰半胱氨酸  

Decomposition of Cysteine and N-acetyl-L-cysteine by DBD Plasma

作　　者：蒋志敏 李迎迎[1] 沈雪松[1] 白先群[1] 

机构地区：[1]桂林医学院药学院,广西桂林541004

出　　处：《广州化工》2018年第1期70-72,160,共4页GuangZhou Chemical Industry

基　　金：国家自然科学基金项目(No:21563008);广西自然科学基金项目(No:2015GXNSFBA139039)

摘　　要：对介质阻挡放电等离子体作用下半胱氨酸和N-乙酰半胱氨酸的分解动力学进行了研究。结果表明,等离子体作用下二者的分解均遵循一级反应动力学规律。半胱氨酸和N-乙酰半胱氨酸在空气、氮气和氧气等离子体作用下的分解速率常数分别为4.33×10^(-5)和3.28×10^(-2)、1.49×10^(-5)和2.51×10^(-2)、6.02×10^(-5)和3.53×10^(-2)s^(-1)。空气等离子体作用下半胱氨酸和N-乙酰半胱氨酸的分解速率表现出p H依赖性,溶液p H对半胱氨酸的分解速率影响更大。Abstract: Decomposition kinetics of cysteine and N - acetyl - L - cysteine under non - thermal dielectric barrier discharge ( DBD) plasma was investigated. The decomposition of both under DBD plasma followed the first-order kinetic law. The decomposition rate constants of cysteine and N - acetyl - L - cysteine under air,N_2- and O_2- plasma treatment were calculated to be 4. 33 × 10^(-5)and 3. 28 × 10^(-2),1. 49 × 10^(-5)and 2. 51 × 10^(-2),6. 02 × 10^(-5)and 3. 53 × 10^(-2)s^(-1),respectively. The decomposition rates of cysteine and N - acetyl - L - cysteine under air - plasma treatment were p H -dependent,and p H of the solution had a greater effect on the decomposition rate of cysteine.

关 键 词：DBD等离子体 半胱氨酸 N-乙酰半胱氨酸 分解 动力学 

分 类 号：O643.1[理学—物理化学]