1. The tomato “flower face†is first related to the variety. Different varieties have different resistances, for example, the red 1420 face rate is lower than 73-45.
2. Related to nutritional supply. It is highly prone to occur in the case of high nitrogen, insufficient phosphorus and potassium, and boron deficiency. First, if the vegetative growth is too strong, the chlorophyll content increases, inhibiting the formation of lycopene, causing a large amount of macula on the tomato fruit surface; second, the lack of boron and potassium, resulting in poor nutrient transport, necrosis due to lack of nutrition in the fruit Turn brown. Third, in the middle and late stages of tomato growth, the plants showed premature aging, which easily caused the fruit that was ripe in the future. In the process of reddening, due to insufficient nutrient supply, the amount of lycopene was small, and large yellow spots and green streaks appeared. It is recommended that the base fertilizer of vegetable farmers be based on organic fertilizer.
3. It is related to temperature. Relevant data show that the tomato fruit surface temperature exceeds 32 °C, which is not conducive to the synthesis of lycopene in the fruit, resulting in the skin remaining green or brown. However, in the case of less than 8 ° C, the formation of lycopene is disturbed and destroyed, and the appropriate temperature is not turned red later. In addition, the night temperature is too high, the breathing intensity is large, which is not conducive to the accumulation of nutrients, and the performance is poor fruit development. Therefore, in the tomato fruit development period, it is necessary to control the temperature at 25-30 ° C and the night temperature at 13-17 ° C.
4. It is related to light and moisture. Light and moisture affect the photosynthesis and transpiration of tomato. When the light is too strong or too weak, it will change color. When the soil is dry and the transpiration of the plant is large, the roots supply nutrients and water, and the fruit turns poorly. Vegetable growers can improve ventilation and light transmission by pruning, but at high temperatures, do not let the sun shine directly on the fruit, paying attention to retaining a leaf above the fruit. Watering to see dryness and avoiding roots and roots.
Intermediate – Intermediate: A material produced during a drug substance processing step that must undergo further molecular modification or refinement to become a drug substance. Intermediates may or may not be isolated. Intermediates are the key products of the previous process of making APIs, which are different in structure from APIs.
for example:
Amoxicillin capsules are called preparations, amoxicillin is called API, and 6-APA is called intermediate.
Ceftriaxone sodium powder is called preparation, sterile ceftriaxone sodium is called API, and 7-ACA is called intermediate.
Our company specializes in providing key intermediates for various APIs
Intermediate is a very important type of fine chemical products. Its essence is a type of "semi-finished product", which is an intermediate product in the production of certain products. For example, if a product is to be produced, it can be produced from intermediates, saving costs and reducing It is widely used in the synthesis of medicines, pesticides, coatings, dyes and spices. In the field of medicine, intermediates are an important link in the industrial chain of the pharmaceutical industry. They are used for some chemical raw materials or chemical products in the process of drug synthesis. In a word, they are used to produce APIs.
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