Comparison of Milk Enzyme Activity in Different Lactation Periods

The study mainly measured enzyme activity of alkaline phosphatase and amylase in the different periods of milk, and seeking the best conditions for the enzyme activity of the respective in different pH, different temperature. Results showed that the activity of amylase in bovine colostrum was higher than in mature milk and terminal milk. The highest amylase activity, 103.28 U/dL, was detected at the temperature 40 oC and pH 6. The best condition for Bovine colostrum of alkaline phosphatase activity is higher than mature milk and terminal milk. Alkaline phosphatase activity is the highest temperature at 40 oC and pH 10, about 96.38 U/mL.