摘要
Due to some deficiencies of the polysaccharides degradation by the methods of chemical,thermal or enzymatic treatment,sonication was introduced for the degradation of Porphyra yezoensis polysaccharide(PYPS).The Mark-Houwink equation,showing the relationship between molecular weight and intrinsic viscosity,was set up.It was found from the results of the degradation dynamics that there was an exponential relation between the rate constant and treatment time of sonication,different from the traditional chemical,thermal or enzymatic treatment.The activation energy of the degradation was 52.13 kJ·mol-1,and it could be preliminarily concluded that ultrasonic degradation was better than the enzymatic ones.
Due to some deficiencies of the polysaccharides degradation by the methods of chemical, thermal or enzymatic treatment, sonication was introduced for the degradation of Porphyra yezoensis polysaccharide （PYPS） . The Mark-Houwink equation, showing the relationship between molecular weight and intrinsic viscosity, was set up. It was found from the results of the degradation dynamics that there was an exponential relation between the rate constant and treatment time of sonication, different from the traditional chemical, thermal or enzymatic treatment. The activation energy of the degradation was 52.13 kJ · mol^-1 , and it could be preliminarily concluded that ultrasonic degradation was better than the enzymatic ones.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2007年第3期660-664,共5页
CIESC Journal
基金
江苏省高技术研究项目(BG2003319)。~~
关键词
条斑紫菜多糖
超声降解
反应动力学方程
活化能
Porphyra yezoensis polysaccharide
ultrasonic degradation
reaction dynamic equation
activation energy
