Thermal Inactivation Kinetics of Peroxidase in Coriander Leaves

被引:23
|
作者
Rudra, S. G. [2 ]
Shivhare, U. S. [1 ]
Basu, S. [1 ]
Sarkar, B. C. [3 ]
机构
[1] Panjab Univ, Dept Chem Engn & Technol, Chandigarh 160014, India
[2] Univ Delhi, Dept Food & Nutr, Inst Home Econ, New Delhi 110016, India
[3] St Longowal Inst Engn & Technol, Dept Food Technol, Longowal 148106, India
关键词
Coriander; Peroxidase; Heat treatment; Blanching; Modeling;
D O I
10.1007/s11947-007-0013-2
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Design of efficient blanching treatments requires knowledge of critical factors such as enzyme inactivation kinetic parameters and relative proportions of heat-labile and heat-resistant fractions, which is unique in each vegetable. Thermal inactivation curves for peroxidase in coriander leaves were determined in the temperature range of 70 to 100 C and in steam. The isothermal data were statistically treated using both linear and nonlinear regression. Applicability of various enzyme inactivation models available in the literature was critically evaluated. The two-fraction first-order model was found to be the best model to describe the peroxidase inactivation kinetics in coriander leaves (R-2>0.97). Kinetic parameters were determined for heat-labile and heat-resistant isoenzyme fractions. The temperature dependence of the rate parameters in the present study did not follow the Arrhenius relationship.
引用
收藏
页码:187 / 195
页数:9
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