Radix Hedysari
1、 Pharmacopoeia standard of Radix Hedysari       . Excavate in spring and autumn, remove fibrous roots and root heads, and dry them in the sun.
      [character]   This product is cylindrical, with few branches, the upper end is slightly thick, 10 ~ 50cm long, 0.6 ~ 2cm in diameter. The surface is grayish red brown, with longitudinal wrinkles, transverse lenticel like protrusions and a few branch root marks. The outer skin is easy to fall off, and the peeling part is light yellow. . It tastes slightly sweet and has a beany taste when chewing.
      [identification] (1) cross section of this product: the cork layer is 6-8 rows of cells. . Phloem is wide, with cracks on the outside, fibers are scattered in bundles, fiber wall is thick and slightly lignified; Phloem rays are often curved on the outside. The cambium forms a ring. Xylem vessels are scattered singly or clustered in 2-3 groups, surrounded by wood fibers. Parenchymal cells around fiber bundles contain calcium oxalate crystals.
      Powder yellowish brown. The fibers are in bundles, with a diameter of 5-22 μ m, wall thickness and microlignification. The surrounding cells contain calcium oxalate crystals, forming crystalline fibers, and the walls of crystalline cells are unevenly thickened. The diameter of calcium oxalate square crystals is 7 ～ 14 μ m, and the length is about 22 μ M. The diameter of the marginal pit catheter was up to 145 μ M. ; The compound granule is composed of 2-8 fractions.
      (2) Take 1g of the product powder, add 10ml of methanol, sonicate for 30 minutes, filter, and concentrate the filtrate to 1ml as the test solution. Another 1g of Radix Hedysari reference material was prepared into the reference material solution by the same method. According to the test of thin-layer chromatography (general rule 0502), suck 5 μ l of each of the above two solutions, dot them on the same silica gel gf254 thin-layer plate respectively, use dichloromethane acetone (15:1) as the developing agent, develop, take out, dry, and view under the UV light (254nm). ; Spray with 1% vanillin sulfuric acid solution. In the chromatogram of the test sample, spots of the same color appear on the corresponding position of the chromatogram of the control medicinal material.
      [check]   Moisture   Not more than 10.0% (the second method of general rule 0832).
      Total ash   .
      [extract]   According to the hot leaching method under the determination of alcohol soluble extract (general rule 2201), 45% ethanol shall be used as solvent, which shall not be less than 25.0%.
        Decoction pieces
      [processing]   Remove impurities, separate size, wash, moisten thoroughly, cut into thick pieces, and dry.
        This product is a thick round or oval shaped piece. The outer skin is reddish brown or yellowish brown. . It tastes slightly sweet and has a beany taste when chewing.
      [identification]   [check] [extract]   Same as medicinal materials.
      [nature, taste and meridian tropism]   Gan, slightly warm. Return to the lung and spleen meridians.
      [function and indications]   . It is used for Qi deficiency and fatigue, eating less and loose stools, depression of middle Qi, long-term diarrhea and anal prolapse, blood in stool and metrorrhagia, surface deficiency and spontaneous sweating, Qi deficiency and edema, internal heat and thirst, blood deficiency and yellowing, hemiplegia, arthralgia and numbness, carbuncle and gangrene difficult to collapse, and long-term collapse without convergence.
      [usage and dosage]     9～30g。
      [storage]   Place in a ventilated and dry place, damp proof and mothproof.


2、 Chemical constituents of Radix Hedysari
Hedysari contains Hedysari polysaccharideFormononetin、Formononetin, multiple amino acids. It also contains 21 inorganic elements

3、 Pharmacological effects of Radix Hedysari
It can significantly promote immunity and delay aging; Improve experimental respiratory distress syndrome; Enhance hypoxia resistance; Sedative, analgesic, anti-inflammatory, anti pathogenic microorganisms, etc.