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Views: 0 Author: Site Editor Publish Time: 2022-02-21 Origin: Site
Dry rhizome is round nodular head shape, about 2 ~ 6 cm long, about 1.5 ~ 3 cm in diameter, the top of the stem base and petiole
residue marks, at the bottom there is often an uncleaned mother root, about 3 mm in diameter, light gray yellow, fibrous, slightly hard quality; Clusters under the pimple head many fine roots, very long about 5 ~ 14 cm, more plait; The surface is purplish red or gray-red with longitudinal wrinkles. Quality flexible, not easy to break, section gray with purple edge. Slight aroma, sweet taste slightly bitter. It is better to have long root, purple color, flexible quality and clean stem seedlings.
Cross section of roots: Epidermis of old roots is often abscissive. Broad cortex; A row of lower skin cells, slightly thicker wall, some containing purple pigment; Sclerenchyma cells are few and scattered, and the wall thickness is 3-8μm. There were 5 tubing, distributed outside the endodermis and usually opposite to the phloem bundle. The endodermis cells are seen in Kjeldahl spots. The stele is small and slightly pentagonal; 1-2 rows of cells in pericycle; Phloem cells are small and closely arranged. Cambium is not obvious; There were 5 xylem fascicles, and 5 prototypical primary xylem could be seen inside. The central pith cell wall is slightly thicker and woody. Parenchyma cells of this product contain inulin.
(1) The surface of the inferior skin cells is rectangular, and the vertical wall is thin and wavy, with purplish red pigment cells and light yellow cells arranged alternately.
② The stone cells (rhizome) are rectangular, round, square or round triangle, 45-154 μm in diameter, 6-25μm in wall thickness, and obvious layers and grooves.
③ Sclerenchyma cells oblong or quasi-oblong, 30-73μm in diameter, about 315μm in length, 2-10μm in wall thickness, non-lignified, the grain pores are transverse fissure.
Parenchyma cells are rectangular, with slightly thicker walls, and most of them have obvious diagonal staggered reticular texture.
The inulin lump is round or fan-shaped, with slightly radial texture. In addition, wood fibers, ducts, endodermis cells, tubing fragments, calcium oxalate clusters. This product is best with thick and long root, purple red color and flexible quality.
1) Identify 2 grams of powder, add 20 ml of water, heat it in a 60℃ water bath for 10 minutes, filter it while it is hot, and cool it. Take 2 ml of filtrate, place it in a corked test tube and shake it vigorously for 1 minute to produce persistent foam, which will not disappear within 10 minutes.
2) Take 2g of the product, add 10ml ethyl ether, soak overnight, filter, drop the filtrate on the filter paper, observe under uv light (254nm), blue fluorescence.
3) Take 2g of the product, put it into a 50ml triangular flask, add 15ml ether, soak for 1 hour, and filter. Take 4ml filtrate, steam to remove ether, residue dissolved in acetic anhydride 1ml, drop 1 drop of concentrated sulfuric acid, purple, the upper layer of solution gradually green (check steroids).
4) Take 4ml of ethyl ether leaching solution in item (3) and steam away the ethyl ether. The residue is dissolved in 1ml methanol, then add 2, 4-dinitrophenylhydrazine test solution 1ml, and after heating, yellow precipitate is precipitate (check astronone).
