Middle-temperature Alpha-amylase One.Product presentation Middle-temperature alpha-amylase is extracted from fermented deeply Bacillus subtilis.It can hydrolyze starch and hepatin,dissolve internal Alpha-1,4 glucose glycosidic linkage,produce short-chain dextrineand oligosaccharide to reduce viscosity of gelatinous starch rapidly.This enzyme can be used in beer brewing,alcohol production,monosodium glutamate, starch sugar,feed,liquefication of fermentation business,fiber,printing and dyeing,etc. Two. Product specification and qanlity index Item Index Item Index Appearance Light-yellow powder Brown liquid Temperature Below 80degrees Activity u/ml(g) 2000 3000 4000 6000 Best temperature 60-70degrees Smell No irritative smell Water concent 8% pH range 5.8-7.0 40mesh ¡Ý80% Best pH 6.0-6.4 Volume weight ¡Ü1.25g/ml Three.Define of enzyme activity In the condition of 70 centi grade,pH6.0,the amount of this enzyme it needs which dissolved starch becomedextrine in one minute.This is an enzyme activity. Four.Using methods 1. In the process of beer brewing,this enzyme can be added after material is stirredin the mash boiler.each gram material can need 6 unit enzyme The material can be liquefied about 30 mins in 85-90 centi grade. 2. In the process of sugar and monosodium glutamate,this kind of starch enzyme can be added to starch slurry(6-8 unit per gram material),after they are sufficiently mixed,you can heat them to 85-90 centi grade and liquefy them about 30 mins. 3. In the process of textiles desizing,it can be used in desizing of no resisting high-temperature silk,chemical fiber,linsey-woolsey.The addition of this enzyme is 0.2 percent(30000u/ml),and it should be kept 20-40 mins after the temperature is increased to 50-80 centi grade. 4. In other industries,the addition of enzyme can be controlled in 6-8 unit per gram starch,and concentration of Ca is 150 ppm.