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[Chemical Knowledge]：Properties and Uses of Cystine

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The properties and uses of cystine play an important role in the field of raw materials for chemical production. As a sulfur-containing amino acid, cystine plays a key role in many biological processes and is widely used in many industries. This article will detail the properties of cystine, production methods and uses in different fields.

1. the nature of cystine

cystine (Cystine) is an amino acid containing two sulfur atoms, the chemical formula is C6H12N2O4S2. Its molecular structure contains two carboxyl groups, an amino group and a sulfur-sulfur bond. Cystine has good stability, is not easy to be oxidized, and has a certain solubility in aqueous solution. Because its molecule contains sulfur atoms, cystine can participate in the formation of disulfide bonds, which play an important role in the structure and stability of proteins. There are two main methods for producing

2. cystine

cystine: one is extracted from hair, and the other is produced by microbial fermentation.

1. extract from hair: hair is rich in cystine, through acidolysis, alkali extraction, crystallization and other steps, can be extracted from the hair cystine. The purity of cystine produced by this method is higher, but the production process is more complicated and the cost is relatively high.
2. microbial fermentation method: through microbial fermentation method, can use waste materials such as blood meal, soybean meal as raw materials, production of cystine. This method has the advantages of low production cost and environmental protection, but the purity of the product may be relatively low. The use of

3. cystine

cystine has a wide range of uses in the field of chemical production raw materials, and its application in different fields will be described in detail below.

1. in the field of medicine: cystine in the field of medicine can be used as nutritional supplements, liver medicine, etc. Because of its good stability, it can be used as an excipient of drugs to improve the stability of drugs. In addition, cystine also has anti-allergic, antioxidant and other effects, can be used for the treatment of allergic dermatitis, hepatitis and other diseases.
2. Food field: Cystine can be used as a food additive to improve the taste and nutritional value of food. For example, adding cystine to bread, pastries and other foods can improve the elasticity of gluten and make the food taste softer. At the same time, cystine also has a certain antioxidant effect, can extend the shelf life of food.
3. Cosmetics: Cystine has good moisturizing, antioxidant and anti-allergic effects, so it is widely used in cosmetics. It can be used as a moisturizing factor to improve the moisturizing effect of cosmetics; at the same time, due to its anti-allergic effect, it is also suitable for cosmetics for sensitive skin.
4. Feed field: Cystine can be used as an additive in animal feed to improve the growth performance and health of animals. Adding cystine in the feed can promote the growth and development of animals, improve feed utilization and reduce feeding costs.

In short, cystine as an important chemical production raw materials, in medicine, food, cosmetics and feed and other fields have a wide range of applications. With the continuous progress of science and technology, the production methods and application fields of cystine will continue to expand, injecting new vitality into the development of the chemical industry.

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