地黄和饮片.doc（Land yellow and beverage. Doc）.docVIP

地黄和饮片.doc（Land yellow and beverage. Doc） To yellow Dihuang RADIX REHMANNIAE This product is a fresh or dry root of the Rehmannia glutinosa Libosch. Autumn mining, remove reed, root and sediment, fresh; Or gently bake it until about 80% dry. The former is known as fresh land yellow and the latter is a raw land yellow. [traits] the fresh ground yellow is spindle-shaped or striped, 8 ~ 24 cm long and 2 ~ 9 cm in diameter. The outer skin is thin, the surface is light red yellow, has curved longitudinal wrinkle, the bud mark, the transverse long skin hole kind protrusion and irregular scar. Fleshy, easy to break, the section of the skin is yellowish white, visible orange-red oil point, the wood is yellow and white, the catheter is arranged radially. The air is small, sweet and bitter. There are irregular masses of yellow and yellow, large and round, medium swollen, and slightly thin at both ends, some small, long strips, slightly flattened and twisted, 6 ~ 12 cm long, 2 ~ 6 cm in diameter. Surface brown or brown gray, extremely wrinkled, with irregular transverse curve. Body weight, soft and tough, not easy to break, section brown black or black, shiny, sticky. The air is small and the taste is sweet. (1) the cross section of this product: a series of cork cells. The lining cells of the inner lining of the lining were loosely arranged. There are more secretory cells, including orange oil droplets; I have some stone cells. Phloem is wide and produces fewer cells. The formation of the formation rings. The xylem rays are broad; The catheter is sparse and arranged in a radial pattern. Raw ground yellow powder dark brown. Cork cells light brown. Parenchyma cells are round, with a circular nucleus. The secretory cells are similar in shape to those of the thin wall cells, containing orange or orange oil droplets. The diameter of the bordered perforated duct and reticulated duct is about 92 mu m. (2) take the powder 2 g, add methanol 20 ml, heat return 1 hour, put cold, filter,