Elective Topic 1 of the People's Education Board 3 "Immobilization of Yeast Cells" ppt enzyme: Advantages: high destruction efficiency, low energy consumption, low pollution Practical problems: sensitive to environmental conditions, easy to inactivate; enzymes in solution are difficult to recover Can not be used again, which increases the production cost; after the reaction, the enzyme is mixed in the product. If it is not removed, it will affect the quality of the product. Assumption: Immobilize the enzyme on a carrier that is not tolerated with water. It can be easily separated from the reactants by contact, and at the same time, the actual problem can be reused: an enzyme can only catalyze a chemical reaction, and in production practice, many products are formed through a series of enzymatic reactions. Assumption: Enzymes are synthesized by cells. Can the cells of synthetic enzymes be directly fixed?