タイトルまたは説明

Product: Acid Lactase
Description   Apurified preparation of lactase derived from Aspergillus oryzae,  International Enzyme Number EC 3.2.1.23, GB2760
 
Activity     ALU/g ≥170,000(powder) /ALU/g≥10,000(liquid) (FCC method)
At Ph4.5、37℃，per minute releases 1umole ONP-Gis a lactase unit.
Inhibitors            Ca2+、Zn2+、Cu2+、Fe2+
Trigger               Mn2+、Mg2+
Effective temperatureUnder 55℃ stable and above 60℃ loosing activity
very rapidly，Optimal Performance at 50℃。
Appearance          White or light Yellow powder/liquid
Package                  10 Kg /bag
Moisture                ≤8%(powder)
Menstruum           only water(liquid)
Effective pH Range    Between 4 and 8 ,Optimum Ph is 5.2
Metal                  Lead (Pb) ≤5.0mg/kg
                    As (As)  ≤3.0mg/kg
Microbiological    TVC(cfu/g or cfu/ml)≤100
                 Coliforms(cfu/g or cfu/ml)≤30
Escherichia coli:  Absent
Yeasts:  Absent
Salmonella  No detected in 25g
 
Application      Hydrolysis of lactose in milk, whey and yogurts
Status           QS
Storage    Should be stored in a cool (0 -5 ℃) and dry place,  away from
                 direct sunlight and keep the container sealed . Under these
                 conditions the shelf life of the product is one year without
                 noticable loss of activity.
 
Suggested adding method:
A  activity: hydrolyze the lactase with pure water to 170000 ALU/g
B  dosage: 1000ml lactase solution per ton milk
C  temperature: 5℃—25℃
D  pH：the nature pH value of milk,about pH6.5
E  reaction time：3days below 25℃
          
Table 1: the hydrolysis result of lactase added according to the above method