Peanuts for the legume crops, high-quality edible oil, one of the main varieties of oil, also known as "groundnuts" Peanut is a one-year-old herb. Originated in South America, tropical and subtropical regions. About the sixteenth century into our country, the development of the late nineteenth century. Are now planted all over the country, mainly distributed in Liaoning, Shandong, Hebei, Henan, Jiangsu, Fujian, Guangdong, Guangxi, Sichuan and other provinces (autonomous regions).
Peanut pod fruit, usually divided into three Xinhuanet, the shape of cocoon-shaped, bead-shaped and rod-shaped Qu. Cocoon-shaped seed pod with two more, bead-shaped and rod-shaped pod songs generally have three or more seeds. Shell for the color yellow-white, there are brownish-yellow, brown or yellow, which is peanut varieties and soil-related. Peanut shell of seeds commonly known as peanuts or peanut by the seed coat, cotyledon and the embryo is composed of three parts. Seed coat color is light brown or light red. Seed coat film for two leaves, were white or ivory.
Peanut fruit of high nutritional value, contains a wealth of fat and protein. Determination of peanut fruit, according to the fat content in 44% -45%, 24-36% for protein content, sugar content is about 20%. And contains thiamine, riboflavin, niacin and other vitamins. Is also very rich in mineral content, especially the human body must contain the amino acids, can promote development of brain cells and enhance memory function.
Peanut oil-rich seeds, groundnut kernels from the extracted oil was light yellow, transparent, pleasant aroma, is high-quality edible oil. Difficult to dissolve in ethanol, peanut oil, peanut oil can be injected by 70% ethanol solution is heated to 39-40.8 degrees, cloudy to see the extent to determine whether pure peanut oil.
Peanut oil is formed through leaching of the oil system. Of peanut oil is non-drying oil, light yellow color, transparency, good, fresh and delicious, is an excellent cooking oil.