A disaccharide formed by the condensation of two sugar molecules through a а glycoside bond. It is the main component of maltose. Made from malt containing amylase acting on starch. Used as a nutrient and also used to prepare culture medium.

From a chemical point of view, maltose (or maltose) is a chemical term and belongs to disaccharide. It is a white needle-like crystal. However, the common maltose is not crystallized, and because sucrose is added during cooking, the white maltose turns golden yellow, which increases its color and fragrance. The chemical formula of maltose is C 12H22O 1 1.

Physical properties: white crystal, soluble in water, sweet (not as good as sucrose). (Isomerization of Sucrose)

Chemical properties: (1) Reducible: It can react with silver mirror and is a reducing sugar. (2) Hydrolysis reaction: the product is 2 molecules of glucose.

Maltose has aldehyde groups in its molecular structure, which is reducing and a reducing sugar. Therefore, it can react with silver ammonia solution through silver mirror, or it can react with newly made basic copper hydroxide to generate brick red precipitate. It can hydrolyze to produce two molecules of glucose under certain conditions.

Two. Colorless or white crystals, thick syrup. The crystalline maltose of one molecule of water melts and decomposes at 102 ~ 103℃. Soluble in water, slightly soluble in ethanol. Reductive disaccharides include aldehyde group reaction and silver mirror reaction, and can also be heated with Bancroft reagent (prepared with copper sulfate, sodium carbonate or caustic soda, sodium citrate and other solutions) to generate brick red cuprous oxide precipitate. It can make bromine water fade and be oxidized into maltogenic acid. Hydrolyzed into 2 molecules of glucose under the heating of dilute acid or the action of α -glucosidase and used as food, nutrition, etc. It is made by hydrolysis of starch, which is usually made by mixing enzymes in malt with starch paste and fermenting at a suitable temperature.

Maltose can be made into crystals and used as a sweetener, but the sweetness is only 1/3 of sucrose. Maltose is a cheap nutritious food, which is easily digested and absorbed by human body.

Related food:

It is made of wheat and glutinous rice, sweet and delicious, rich in nutrition, and has the effect of invigorating stomach and promoting digestion. It is a kind of food suitable for all ages.

In recent years, prebiotics and probiotics popular in the food industry are actually a kind of maltose-isomaltooligosaccharide. Many foods contain this nutritional ingredient, such as Yake V9 vitamin candy, Mengniu probiotic milk, Yuan Yefang malt additive, Youzhiyuan children's probiotic nutritional tablets, etc., all of which have achieved great success in the market by this concept.