This product is made of barrel , plunger ,piston and needle.This barrel should be clean and transparent enough to easy observe.Barrel and piston matches well and it has a good property of sliding,and is easy to be used. 2ml Disposable Medical Sterile Syringe 2ml ;Disposable Medical Sterile Syringe;Medical Factory Changzhou Yuandong Medical Equipments Co.,Ltd , https://www.czydmedical.com
The product is applicable to push the solution to the blood vein or subcutaneous , also can extraction blood from the human body in the veins.It suits users of different age and is the basic methods of infusion.
(1) At the germination stage, the optimum temperature for the seed germination stage is 25°C to 30°C, the maximum temperature is 40°C, and the minimum temperature is 15°C. If it is lower than 25°C, it germinates slowly and is not neat; when it exceeds 35°C, it germinates quickly, but its growth is inconsistent and it is easy to weaken. The seeds of common eggplants germinate poorly under constant temperature conditions, and the use of variable temperature treatment can promote germination, that is, it is maintained at 30° C. for 8 hours during the day and maintained at 20° C. for 16 hours at night. Newly harvested seeds are less likely to germinate at a constant temperature. With the increase of seed storage time, germination can be achieved at a constant temperature, and the range of adaptation is also large. (2) At seedling stage, the optimum temperature for seedling growth is 22°C~30°C. The maximum temperature for normal reproduction is 32°C~33°C, and the minimum temperature is 15°C~16°C. Beyond this range, it is extremely unfavorable for the growth and development of eggplant during seedling stage. The eggplant seedling temperature management not only needs to consider the vegetative growth at the seedling stage, but also takes into account the temperature requirement of flower bud differentiation and development. The key to temperature management is the temperature difference between day and night, that is, the temperature during the day maintains the temperature for promoting photosynthesis of the leaves, and the temperature at night keeps the assimilation products in the leaves running outward. The suitable temperature difference between day and night is: daytime 22°C~25°C, maximum 26°C~28°C; nighttime 13°C~15°C, no more than 20°C. After sub-seedling, keep at 25°C~30°C during the day and 15°C~20°C at night so as to ease the seedlings. At night, the temperature is too high, especially after the middle of the night, the temperature is too high, respiratory consumption increases, dry matter accumulation decreases, seedlings are not only easy to grow, but also affect the flower bud differentiation, the quality of seedlings is reduced, is not conducive to the cultivation of strong seedlings. The management of ground temperature should be coordinated with the temperature. The ground temperature during the day should be slightly lower than the temperature, keep 23°C~25°C, and be slightly higher than the air temperature at night, keep it at 19°C~20°C to promote the development of the root system, which is conducive to the cultivation of strong seedlings. . (3) During the result period, good temperature control in the result period has an important effect on high yield. The suitable range of daytime temperature is between 20°C and 30°C, and 25°C is the most suitable. The temperature dropped below 20°C, pollination, fertilization, and poor fruit development. Below 15°C, it grows slowly and tends to fall. Below 13°C, it stops growing. Below 10°C, metabolism is disturbed. On the contrary, when the temperature exceeds 35°C, the stems and leaves can grow normally, but the flower organ development is hindered, the proportion of short stupa increases, and the fruit is deformed or falls. The optimum temperature at night is 18°C~20°C. If the night temperature is high, the most vigorous fruit enlargement cannot be promoted. As the amount of assimilation material sent to the growth site becomes smaller, the symptoms of plant nutrient deficiency will gradually appear, which will affect the subsequent flower and fruit. The growth and development lead to a reduction in production.