Rhubarb is a variety of polygonaceae Rhubarb genus perennial plant collective name, is also the name of Chinese herbal medicine. In Chinese literature, the term "rhubarb" often refers to the horseshoe rhubarb. In China, rhubarb is used primarily for medicinal purposes, but in Europe and the Middle East, rhubarb is often referred to as several other edible varieties of Rhubarb with red stems. The air is fragrant, the taste is bitter and slightly astringent, the chewing is sticky, and there is a sense of sand. The stems and leaves wilt in late autumn or sprout in the next spring. Remove the fine roots, scrape off the skin, cut the petals or segments, and tie the rope into strings to dry or dry directly. The traditional Chinese medicine Rhubarb has the effects of attacking stagnation, clearing dampness-heat, purging fire, cooling blood, removing blood stasis and detoxification.
The product is cylindrical, conical, oval or irregular block, 3 ~ 17cm long, 3 ~ 10cm diameter. In addition to the outer skin, the surface is yellowish brown to reddish-brown, and some can be seen like white mesh texture and stars (heterotype bundles) scattered, residual outer skin brown, many rope holes and thick wrinkles. Solid quality, some slightly soft, cross section reddish brown or yellowish brown, granular; The pulp of the rhizome is broad, with star rings or scattered; Rootstock developed, with radial texture, stratified ring obvious, no star points. The air is fragrant, the taste is bitter and slightly astringent, the chewing is sticky, and there is a sense of sand.
Finished product identification
Transverse section of Rhubarb: The root cork layer and cortex have been mostly removed. Phloem was obvious; Parenchyma is well developed. The cambium forms a ring. Xylem rays are dense, 2 ~ 4 columns of cells wide, containing brown matter; Guides are not lignified, often 1 to several together, sparsely arranged. Parenchyma cells contain calcium oxalate clusters and most starch grains. The pulp of the rhizome is broad, and there is a common mucous cavity with reddish-brown substance; The heteromorphic bundles are scattered, the cambium is formed into a ring, the xylem is located outside the cambium, the phloem is located inside the cambium, and the rays are emitted in the shape of stars. Powder yellowish brown. Calcium oxalate cluster rhubarb crystal diameter 20 ~ 160μm, some up to 190μm. With marginal holes, mesh, thread and ring leads to non-lignification. There are many starch granules, single granules spherical or polygonal, 3-45 μm in diameter, umbilical point star; The compound grain consists of 2 ~ 8 fractions.
Use drugs to identify raw rhubarb diarrhea strong, so want to attack should be used, into the decoction should be taken after, or with open blisters; Decocting for a long time will weaken the laxative force. Wine-grilled rhubarb has weak cathartic force, good blood-activating effect and easy blood stasis syndrome. Rhubarb charcoal is mostly used for blood. END
(1) cathartic effect (2) gallbladder, liver protection (3) promote pancreatic secretion, inhibit pancreatic enzyme activity (4) anti-gastric and duodenal ulcer END
taboo
All superficial syndrome, blood deficiency and qi weakness, spleen and stomach deficiency cold, no solid heat, stagnation, stasis, as well as before and after childbirth, should be carefully taken. If this product is used for purging and defecation, it should be taken after decocting, or use boiling water to open the blister juice, otherwise the effect will be weakened. After taking rhubarb, its pigment will be excreted from the urine or sweat glands, so urine and sweat can appear yellow. In addition, after rhubarb nursing women take, the baby sucking milk, may cause diarrhea, so lactating women should not take. Since this product can promote blood circulation and blood stasis, women must also be used with caution before and after childbirth and during menstruation.