Identification of Mao Dongqing
Biological identification
Identification of traits: roots are cylindrical, and some branches, different lengths, diameter 1 ~ 4cm. The surface is grayish-brown to tan, and the head of the root has stem branches and stem residues; the skin is slightly rough with longitudinal fine wrinkles and transverse lenticels. Solid quality, not easy to break, thin section of the skin, wood development, soil yellow to gray, there are dense radial texture and ring pattern. Gas micro, bitter, astringent and sweet afterwards. Most of the goods are piece-shaped, ranging in size from 0.5 to 1cm thick.
Microscopic identification: Root cross-section: The cork layer is 7 to 10 cork cells. The cortex is 2 to 3 columns of tangentially elongated parenchyma cells. The phloem is narrow, with a single scattered or 2-3 clusters of stone cells. The stone cells are long, oblong or irregular, 30-100 μm long, 30 μm in diameter, with round wall holes, and bast ray cell square. Thin wall. The formation layer is not obvious. Xylem vessels 1 to 3 columns arranged in rows; wood fiber developed; wood ray width of 2 to more than 10 columns of cells, cells with pits; the entire xylem can see most of the growth of round cells formed by 1 to 3 flat cells. The parenchyma is full of starch grains, round in shape, and 5 to 15 μm in diameter. The umbilical cord has a herringbone shape or a crack. Cortical parenchyma has a lot of oil droplets.
Physical and chemical identification: take this product 1g, add 50% ethanol 10ml, boil 10min, cooling, filtration, the filtrate for the following tests: 1 2mL of filtrate was taken, plus 2mol/L acetic acid - 2mol/L sodium acetate (3:1) 1mL, 0.1mL/L aluminum trichloride 1mL, yellow. (Check flavonoids) 2 Take filtrate 1mL, add 1% ferric chloride test solution 1mL, produce a blue-black precipitate. (Check phenolic substances)
Identification of drug applications: Mao Dongqing and Mao Dong melon have detoxification, blood circulation, dampness of the power, but the hair winter melon is spicy, cold, it published detoxification, heat work is particularly successful, Mao Dongqing Gan light infiltration benefits, so diuresis seepage The power of wet is better than hairy melon.
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