For liquid pesticides, dilute directly when the amount of liquid is small. The correct method is to pour 1/3 of the clean water into the prepared medicine container first, then slowly pour the quantitative medicine into water, then fill it with water, and mix it with a wooden stick and then use it gently.
For wettable powders, a two-step preparation method is adopted, that is, a relatively small amount of water is used to prepare a relatively thick mother liquor, and then the liquid pesticide is diluted according to a dilution method. For powder pesticides, it is mainly diluted with fillers. First take the filler (grass ash, rice bran, etc.) Mix the required powder pesticide into the mix, and then add it repeatedly until it reaches the required multiple.
For granule pesticides, use appropriate fillers to mix them. Dilution can be done by using dry soft soil or acid-alkali-conformant chemical fertilizer as a filler, and stir evenly according to a certain proportion.
Chinese herbal medicine chemistry refers to the science of using modern chemical theories and methods to study the chemical composition of Chinese herbal medicine. The object of Chinese herbal medicine chemistry research is the chemical composition of Chinese herbal medicine. The chemical composition of Chinese herbal medicine is very complex, usually sugar, Amino Acid, protein, oil, wax , enzymes, pigments, vitamins, organic acids, tannins, inorganic salts, volatile oils, alkaloids, glycosides, etc. Every Chinese herbal medicine may contain multiple ingredients. Among these ingredients, some of them have obvious biological activity and play a medical role, and are often called active ingredients, such as alkaloids, glycosides, volatile oils, amino acids, etc. The reason why Chinese herbal medicine has medical effects is mainly due to the active ingredients it contains. In addition to many active ingredients of Chinese herbal medicines that have been studied in the past and have been widely used, such as berberine (berberine), which is Antibacterial and anti-inflammatory in Coptis chinensis, ephedrine, which is antiasthmatic in Ephedra, and reserpentine, an antihypertensive ingredient in Rauwolfia, In recent years, more active ingredients of Chinese herbal medicines have been discovered one after another at home and abroad, especially in terms of biological active ingredients for anti-tumor, treatment of cardiovascular diseases and chronic bronchitis. Other ingredients are commonly found in Chinese herbal medicine, but usually have no biological activity and no medical effect, and are called "ineffective ingredients", such as sugars, proteins, pigments, resins, inorganic salts, etc.
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