Characteristics of brown rice
feature
Brown rice is cariogenic, and its surface is smooth and shiny. In rice with brown rice, one side of the grain with embryos is called belly white, and the side with no embryo is called back. There are five vertical grooves on the surface of the brown rice grain, and the back side is called a back groove, on both sides
There are two meters called ditch. The cortex at the brown rice groove is difficult to remove when rice is milled. For the same variety of rice, the more the skin at the groove is, the lower the processing precision is, so the rice processing precision is often controlled by the grain and back groove. Degree to indicate. Some brown rice show opaque white spots in the center of the abdomen or rice grains, which is white or white. Abdominal whiteness and heart whiteness are caused by inappropriate weather, rainfall, and fertilizers during rice growth.
Brown rice consists of pericarp, seed coat, extra-endosperm, endosperm and embryo. The pericarp includes exocarp, mesocarp, horizontal cells, and tubular cells with a total thickness of about 10 microns. The seed coat is extremely thin, about 2 microns in thickness, and the structure is not obvious. Some brown rice seed coats contain pigments and present color. The outer endosperm is a thin film-like tissue that adheres to the seed coat and is 1 to 2 microns thick. It is difficult to distinguish it from the seed coat. The endosperm is the largest part of the rice grains, including the aleurone layer and starch cells. The aleurone cells are filled with tiny aleurone grains, containing proteins, fats, etc., without starch. Starch cells are full of starch grains. Embryos are located at the base of the rice grains and have an ellipse shape. They are composed of germ, embryo, radicle, and scutellum. The scutellum is connected to the endosperm. When the seed germinates, it secretes enzymes and decomposes the material in the endosperm to supply the embryo with nutrients.
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