维生素b1（Vitamin B1）.doc

维生素b1（Vitamin B1） Vitamin B1, also known as thiamine or anti - inflammatory factors. A group of B vitamins formed by the combination of pyrimidine rings and thiazole rings. White crystalline or crystalline powder; has a weak odor, bitter taste, and has a moisture absorption, dew placed in the air, easy to absorb moisture. Easily decomposed in alkaline solution. At pH 3.5 is resistant to high temperature of 100 DEG C, prone to failure when pH greater than 5. Exposure to light and heat decreased. Therefore, should be placed in shade, cool place to save, should not be stored for a long time. It is very stable in acid solution, unstable in alkaline solution and easily destroyed by oxidation and heat. B1 is the first one purified vitamin, scientists first discovered in 1896 in Kingdom of the Netherlands Eekman, 1910 Poland funk chemists from rice bran extraction and purification. It is a white powder, soluble in water, easy to break when it is alkaline. Vitamin B1 is found mainly in the husk and plumule of seeds, such as rice bran and bran, and is found in yeast. Lean meat, bok choy and celery are also plentiful. The vitamin B1 currently used is a product of chemical synthesis. In vivo, vitamin B1 is involved in the catabolism of sugar as a coenzyme and protects the nervous system; it also promotes gastrointestinal motility and increases appetite. Vitamin B1 deficiency can cause a variety of nerve inflammation, such as beriberi pathogen. Vitamin B1 deficiency caused by multiple neuritis, patients around the nerve endings are inflammation and degeneration, and accompanied by numbness of limbs, muscle atrophy, heart failure, edema and other symptoms of the lower extremities. From 18 to nineteenth Century, Chinese beriberi in Japan, in particular, is widely popular in Southeast Asia, then every year about tens of thousands of people died of beriberi. China ancient books in the early treatment of beriberi China medical records, Sun Simiao known skin treated with Gu beriberi.