White birch bark belongs to the Chinese herbal medicine plant form of wart branch birch, also known as: warty birch. Birch plants in the birch family. Deciduous trees. It is a fatty acid ester of chemical composition wood, containing many pentosan, terpenes and sterols. There is still a white anthocyanin reaction.
【Original form】Verrucous birch, also known as: warty birch. Deciduous trees. The bark is greyish-white, composed of several thin layers of skin, easily peeled off, and the inner skin is orange. The shoots often droop, reddish-brown, shiny. The leaves are alternate, often 2 leaves are clustered in one place, triangular ovate or rhomboid ovate, 3~7.5 cm long, apex tapering or caudate tapering, base wedge-shaped or wide wedge-shaped to truncated, heavily serrated edges, glabrous, 6~8 pairs of lateral veins. The spike-like inflorescence is axillary or apical. The fruit is cylindrical, 1~3 cm long, drooping; Fruit bud 3-lobed, middle lobe triangular, lateral lobe downward, longer than middle lobe; The small nut is ovate and has membranous wings twice as wide as the fruit.
【Chemical composition】Wood contains fatty acid esters with a high amount of pentosan, terpenes and sterols. There is still a white anthocyanin reaction.
Chinese medicine has a bitter taste and a flat nature. Clear heat and detoxify, relieve cough and phlegm, and promote dampness.
Mengqi medicine has a bitter taste and is flat. Suppresses cough, expectorant, clears heat, detoxify.
【Pharmacological action】
Aqueous extract, methanol extract, ether and acid ethanol extract of birch bark injected intraperitoneally in mice have certain cough and expectorant effects. Intraperitoneal injection of ethanol-treated birch bark aqueous extract from guinea pigs has a certain anti-asthmatic effect. Birch bark decoction has inhibitory effects in test tubes against certain strains of Pneumococcus, Neisseria catarrhalis, and Streptococcus type A. The decaying part of the bark of the birch plant contains a certain ingredient on the sarcoma of rat transplantation-45, and its mode of action is different from that of sarcomalyticin, and the two have a synergistic effect. The decoction concentrate of birch bark was treated with ethanol, and then the filtrate after concentrated ammonia precipitation was added, and the ethanol was recovered with water to dissolve, and the mouse was injected intraperitoneally, and the LD50 was 92.92 g of crude drug/kg.
Bark of the plant Verrucous birch. Peel and dry trees when harvesting, use raw or stir-fry charcoal.
【Function】Clear heat and detoxify, relieve cough. Treatment of acute and chronic dysentery, cough and asthma, carbuncle.
【Dosage】Internal consumption: baked coke grind, 0.5~1 money; Or drink fresh juice from the skin.
【Attached】
(1) Treatment of acute bacterial dysentery and chronic dysentery: three pairs of birch bark, one or two jujube bark, respectively roasted, a total of fine. Five cents to one dollar each time, three or four times a day. Rinse with boiling water on an empty stomach.
(2) Treatment of cough and asthma: cut the birch bark in spring, take the sap flowing out and take it internally, 20 ml each time, twice a day.
(3) Treatment of carbuncle: white birch peel fried charcoal, grinding, one dollar each time, twice a day, rice wine sent. (The functional treatment is published in the 《Xinjiang Chinese Herbal Medicine Handbook》）
