Maize is a monoecious cross-flower crop, and the same plant male flower (small flower) is opened a few days earlier than the female flower (corn cob) to avoid self-pollination to the plant. In natural conditions, the natural hybridization rate is about 95%. For example, artificial forced self-crossing (the pollination of this plant) is less fruitful and the grain is thinner, and the yield is greatly reduced. Therefore, corn yield can be increased by about 10% by means of septum or interlaced emasculation.
The emasculation effect of the isolates is better than that of the interlaced emasculation. Because the detached plants can be artificially regulated, the anterior and posterior adjacent plants of the emasculated plants are male plants, which increases the chance of pollination by different plants. The emasculation should be pulled out by hand when the male flower (small flower) is taken out from the heart leaf, and the plants on the side and the ground do not go to the male. The male stalks that are pumped out are often lurking with corn mash. Therefore, the male flowers that are extracted should be thrown out of the field or buried deeply to prevent the corn mash from crawling out and harming the corn. The de-male strain of the whole corn field is generally not more than 1/2 of the total number of plants, in order to prevent bad pollination and affect seed production and yield.
After the male flowers are finished, the photosynthesis is extremely weak, relying on the photosynthesis products of the leaves to survive, and such as a parasol, covering 20% ​​to 25% of the sunlight to the whole field, greatly reducing the photosynthesis of the leaves. Features. After pollination, the male inflorescences are cut off with a trowel - "cutting the top", which can make the corn early maturing and increase production.
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Drug intermediates -Pharmaceutical intermediates: A material that is produced during a process step of the drug substance and must undergo further molecular changes or refining before it becomes a drug substance. The intermediates can be separated or not separated.
Active Pharmaceutical Ingredient (APIS)(or Drug Substance) : Active Pharmaceutical Ingredient (API)(or Drug Substance) : Any substance or mixture of substances intended to be used in the manufacture of pharmaceutical products and, when used in pharmaceutical products, to be an active ingredient in pharmaceutical products. Such substances have pharmacological activity or other direct effects in the diagnosis, treatment, symptom relief, management or prevention of disease, or can affect the function and structure of the body. As can be seen from the definition, the Intermediates APIS is a key product of the previous process of manufacturing the API and has a different structure from the API
Finally, for example, amoxicillin capsules are called preparations, amoxicillin is called APIS, and 6-APA is called Veterinary Intermediates APIS.
Penicillin potassium for injection is called preparation, penicillin potassium is called Veterinary raw materials, and green potassium industrial salt is called intermediate
Drug intermediates,Pharmaceutical intermediates,Intermediates APIS
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