After the beginning of spring, rape enters the period of vegetative growth and reproductive growth. At this time, it is very important to do well in field management. After the spring of rape, management must first reapply manure. After the emergence of rapeseed, it began to transform from vegetative growth to reproductive growth. At this time, the roots of rapeseed are well developed, and large amounts of nutrients are absorbed. If the fertilizer is insufficient, the growth of stems and leaves and the flowering and fruiting will be affected. Therefore, more fertilizer should be used. This is called Feifei. In particular, cabbage-type rapeseed, due to shorter flowering and fruiting period and poor fertility, should be applied early after planting manure, and fertilizer should generally be applied to the fields before convulsions. After flowering, it is not appropriate to apply fertilizer again to prevent love and disease. During the flowering period of rape, it is necessary to prevent stains. During the convulsions of rape, a large amount of water is needed, said the farmer; "If you want oil, the water in February ditches." If the lower rape leaves are found to have withered at noon on sunny days, irrigation should be performed in combination with fertilization. When irrigating, pay attention to reach the wet state of the soil. Do not apply too much water. Spring is also the main season for pests and diseases in rape. Common diseases are white rust. White rust is best at a temperature of 10°C. Continuous rain in spring and poor drainage in the field are the most common diseases, and rape is most susceptible to flowering during flowering. Rapeseed was chilled, and the resistance to disease was weakened. It was also susceptible to disease. Early-maturing varieties had a severe disease. Continuous cropping of rapeseed fields increased the number of bacterial sources. In addition to selecting rapeseeds with stronger disease resistance. Strengthen the cultivation and management, pay attention to draining the ditch and reduce the humidity in the field. Do a good job in idyllic cleansing, completely remove the diseased body and avoid continuous cropping with cruciferous crops. In the early stage of disease, use 175% chlorothalonil WP per 100 g, water 60 kg spray; 280% mannep WP 100 g/mu, water 60 kg spray; 370% Thiophanate Wet powder 60 grams per acre, watered 60 kg spray. In the dry season, locusts often occur in large numbers. After discovery, 40% of Dimethoate emulsion is used at a concentration of 1:500 and 200 kg per mu. API Powder is fully defined in ICH Q7A as any substance or mixture of substances intended for use in the manufacture of pharmaceutical products and, when used in pharmaceutical products, as an active ingredient of pharmaceutical products. Such substances have pharmacological activities or other direct effects in the diagnosis, treatment, symptom relief, management or prevention of disease, or can affect the function or structure of the body. The active ingredient of a medicine. Only when an API is processed into a pharmaceutical preparation can it become a medicine for clinical application. alprazolam api powder,pregabalin api powder,buy api powder,api ingredients Shaanxi YXchuang Biotechnology Co., Ltd , https://www.peptidenootropic.com
According to its source, apis are divided into chemical synthetic drugs and natural chemical drugs.
Chemical synthetic drugs can be divided into inorganic synthetic drugs and organic synthetic drugs. Inorganic synthetic drugs are inorganic compounds (very few are elements), such as aluminum hydroxide and magnesium trisilicate for the treatment of gastric and duodenal ulcer, etc. Organic synthetic drugs are mainly made of basic organic chemical raw materials, through a series of organic chemical reactions and drugs (such as aspirin, chloramphenicol, caffeine, etc.).
Natural chemical drugs can also be divided into biochemical drugs and phytochemical drugs according to their sources. Antibiotics are generally produced by microbial fermentation and belong to the category of biochemistry. In recent years, a variety of semi-synthetic antibiotics are the combination of biosynthesis and chemical synthesis products. Among apis, organic synthetic drugs account for the largest proportion of variety, yield and output value, which is the main pillar of chemical pharmaceutical industry. The quality of the API determines the quality of the preparation, so its quality standards are very strict. All countries in the world have formulated strict national pharmacopoeia standards and quality control methods for the widely used APIS.
Specific API after processing -- pharmaceutical preparations
The term API is used mainly in relation to the finished product. Mainly raw materials obtained by chemical processing means, supply raw materials for the production of finished drugs. For example, cefpirome sulfate for injection is a drug, then cefpirome sulfate is an API