Self-raising flour, in fact, you can buy it in supermarkets. Fine flour can be kept without breathing powder or soaking flour, and it can be easily bought after being put there with water.

In self-raising flour, adding leavening agent (baking powder) to flour is convenient and easy to use. Generally speaking, a teaspoon of baking powder is added to 100g to 120g flour to make self-raising flour.

If not, you can use flour and baking powder instead. Generally, 50g baking powder can be mixed with1250g flour.

The crispy fried powder has good crispness retention and is suitable for fried vegetables, seafood and other products with high moisture content.

Corn flour can be divided into refined corn flour and ordinary corn flour. Refined corn flour, also called corn starch (eagle chestnut powder), is used for cooking and frying meat. Ordinary corn flour can be used to make corn bread, corn paste and corn flour.

Usually we say that starch is potato flour or sweet potato flour.

starch

Starch is a polysaccharide condensed from many glucose molecules. There are two kinds: straight chain and branched chain. The straight chain is a linear chain composed of glucose molecules connected by α 1 4. Branches are connected by α 1 6, and straight chains are also connected by α 1 4. Usually, starch is a mixture of amylose and amylopectin. Starch is the storage substance of higher plants, algae and some microbial cells, which widely exists in various plants, especially in seeds (such as rice, wheat and corn) and tuberous roots (such as sweet potatoes and potatoes), and can be used as raw materials for industrial starch preparation. They usually contain 20-30% amylose and 70-80% amylopectin.

In fact, blue is the color reaction of amylose combined with iodine, while amylopectin combined with iodine has poor color performance, which leads to red color. Color analysis has been used as a method to determine amylose content. In the digestive tract of mammals, starch is hydrolyzed by amylase and maltase into glucose, which is absorbed and utilized. General microorganisms also secrete enzymes that can hydrolyze starch and become the source of industrial preparation of amylase.

In industry, a large amount of starch is prepared from corn, potato and sweet potato, which is used in industrial applications, such as fermentation, food and pharmacy.