The method of lactose mass fraction based on the laser refraction was adopted for quick and accurate determination of lactose content in the milk, and the accuracy is 0.

The dioptric method was adopted in this paper for quick and high accuracy determination of lactose content in milk against that of low accuracy and complicated operating in domestic milk industry.

In this paper, we theoretically and experimentally researched the content of lactose in milk through the method of laser refraction.

Study on continuous production of low-lactose milk with immobilized lactase;

The continuous production conditions of low-lactose milk and the usage stability of the immobilized lactase in the filled-bed reactor were researched.

Co-immobilization of lactase and its application in production of low lactose milk

This purpose of this study was to hydrolysis the lactose in milk by immobilizedβ-galactosidase,with a view to solve the problem that the freeβ-galactosidase generate low lactose milk with large quantity of enzyme and high cost besides getting rid of exogenous protein.