The wheat germ accounted for 2% -3% of the wheat grain, wheat grain is the source of life, is the highest nutritional value of whole wheat grain, extremely rich in high quality protein, fat, vitamins, minerals and trace physiological activity ingredients, is called as the “treasure house of natural human nutrition” by nutritionists.
In wheat milling, reasonable process can extract 03% -0.5% of wheat germ, wheat germ milk was yellow. Wheat germ’s protein content is up to about 30%, a high quality plant protein resources. About 10% of the fat content of unsaturated fatty acids accounted for 84% linoleic. It also contains many minerals, and nutrient-rich. Wheat germ also rich in vitamin E, glutathione, lectin and some other functional ingredients.
Natural Vitamin E is an extremely valuable nutrients, it has antioxidant properties. The wheat germ’s vitamin E content is more rich than other plants, every 100 g wheat germ contents about 30-50mg, ranking first in the vegetable oil, contains the full price of vitamin E. Wherein the proportion of the ± form, ² body, each accounting for about 60% and 35%, and natural vitamin E on the biological activity and safety were superior to synthetic vitamin E.
Glutathione is a active tripeptide compose of glutamic acid, cysteine and glycine by peptide bonds, widely exist in the plant and animal tissues, containing up to 0.47% in the wheat germ. Glutathione with the function of clearing the body’s free radicals, protect the biofilm, anti-aging, anti-cancer, prevention of atherosclerosis and detoxification important physiological functions. Can be used as cosmetic raw materials, having a significant effect for skin whitening and anti-aging. The wheat germ also contains lectin, is a very good anti-mutagen, and has a variety of biological effects of anti-cancer, anti-microbial, coagulation plant lectin in the field of medicine, biochemistry, immunology, histology and cytology widely used its value is far higher than that of gold. Wheat germ agglutinin is a natural anti-cancer drugs.
Extraction of glutathione, extract glutathione from wheat germ is a relatively new issue. Its extraction methods are solvent method, fermentation method, and enzymatic. Combined by adding the appropriate solvent; amylase, protease hydrolysis; fermentation processing, separation, and refined. The extracted solvents have: n-hexane, a mixture of erythorbic acid and ascorbic acid, aluminum chloride, sulfuric acid - cuprous chloride. The glutathione suppliers selected ion exchange separation method. Water-soluble extract of wheat germ obtained after the membrane separation a permeate Amberlite252 macroporous resin used for processing, so that the purification and enrichment of glutathione, glutathione concentration may be increased by nearly two-fold. Resulting high glutathione content of the products that can be used in medical products, as functional factors can also be added to a variety of health care and food.
The extraction of vitamin E, the presence of vitamin E make the wheat germ with double value. At present, people have sent CO2 supercritical fluid extraction technology for the extraction of natural vitamin E. Scientists isolated from wheat germ oil, vitamin E, to achieve the initial concentration of the vitamin E extraction pressure of 30 MPa or less, the low pressure separator pressure is about 6MPa.
Source:http://www.cosprm.com
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