α-Amylase An Indispensable Component in the Food Industry

1. α-Amylase: An Indispensable Component in the Food Industry It is knowns that various enzyme preparations have been used in the food industry for hundreds of years and have been widely used in food, medicine, brewing, textile and other industrial fields. With the rapid development of modern enzyme engineering technology, the production technology of enzyme preparations has been continuously improved, significantly increased the efficiency and reduced the costs, from which factories could get the most of economic benefits. At the same time, the manufacturing technology of α-amylase has also been continuously improved, laying its essential role in the food industry. Brief Introduction of α- Amylase Amylase widely exists in animals (usually in saliva, pancreas, etc.), plants (malt, hawthorn), and microorganisms. Different types of amylase have different ways to react with starch, which is the basis to classify amylase into α-amylase, β-amylase, glucoamylase, pullulanase and isoamylase. The α-amylase belongs to the glucohydrolase family 13 (GH13). The reason why it is called α-amylase is that the C atom at the end of the outcome is in α configuration. This enzyme uses Ca2+ as the necessary factor and stabilizing factor to cut off the α-1,4-chain indiscriminately, ensuring reaction with both amylose and amylopectin. Applications in Baking As a safe and effective modifier, α-amylase is mostly used in the baking industry. Adding a proper amount of α-amylase can improve bread quality, not only increasing the bread volume, improving skin color, taste and softness, but extending the shelf life as well. The thermostable α-amylase performs at a high temperature. Just a little α- amylase could completely liquefy the starch, ensuring a higher sugar rate in the flour to better the taste, which is simple to handle. The mesophilic α- amylase can efficaciously control gelatinization degree when making bread and hydrolyze the starch into a suitable dextrin with a high degree of polymerization. Compared with traditional food additives (Chemical reagents, milk powder, sugar esters, antioxidants, etc.), enzyme preparations have better improving and anti-aging effects. Applications in Starch Processing Starch has the advantages of wide source, low price and good taste. It is widely used as the main source of food and energy. The raw material of starch could be converted into a convenient and practical product through the performance of an enzyme. Among them,

2. the thermostable α-amylase overcomes the temperature limitation of common α- amylase and reaches a higher reaction temperature of 90-95 ° C, guaranteed a fast reaction speed and strong reaction effect. Therefore, they are not only used in the starch processing industry, but also widely used in alcohol, fermentation and textile industries. Applications in Beer Brewing and Alcohol Production Adding α-amylase to the raw materials of brewing beer can speed up the liquefaction of raw materials and increase the excipients. Especially in the case of low saccharogenic power, it can meliorate the utilization rate of raw materials and reduce the production cost. Applying both α-amylase and β-amylase at the same time will present better reaction results. While saving energy and saving energy, it has further improved economic efficiency. In the alcohol production process, the cooking temperature can be efficaciously controlled if adding some α-amylase, and the volume of coal and cooling water used can, at the same time, be reduced, which significantly improved the utilization rate of raw materials and the quality of alcohol produced. Till now, α-amylase has been widely used in the food processing industry. Studies showed that α-amylase can maintain high enzymatic activity under some acidic and high-temperature conditions, which can meet the demands of the current industrial development. So our main task is to think how to maximize the potential value of α- amylase, an energy-saving and environmental friendly amylase.