For the liquid nitrogen tank , when the liquid nitrogen is filled, the evaporation takes 48 hours to reset the normal state. The time required for the fine liquid nitrogen tank gauge to recover the normal state can be reduced to 12 hours, and the evaporation loss can be eliminated by 50%. We understand the characteristics of liquid nitrogen and the brief structure of the liquid nitrogen container , so that it can be used accurately and its performance can be fully enhanced. The main points of utilization are summarized as follows: First, there must be someone responsible for management, use and maintenance. The liquid nitrogen tank storage room should have a smooth atmosphere. If a large number of liquid nitrogen tanks are stored in a closed room, the evaporated nitrogen will stay in the room, resulting in anoxic state, which may cause suffocation. The liquid nitrogen tank should be handled gently to prevent collision with other objects. Because the liquid nitrogen tank is exhausted and becomes a high vacuum state, the pressure in the surface tank is proportionally large, with dr-10 and dr-30. For example, the pressure on the outer tank is about four. . o kg to 9. . o kilograms, although it can be made to have three times the strength of its own weight, it must be very meticulous when handling, and can not be lost or collided. Tianchi liquid nitrogen tank skill staff suggested that the liquid nitrogen tank should be connected vertically. It is strictly forbidden to dump the liquid nitrogen in the tank to avoid accidents. 2. When filling the liquid nitrogen for the first time, or when the inside of the liquid nitrogen tank is in a dry state, first check it, see if there is any depression inside the tank or other other environment. There is no foreign matter in the tank, and the base is exactly firm. These environments are well-prepared and can be filled with liquid nitrogen and should be held in a well-ventilated area, as is usually done outdoors. If it is held indoors, the doors and windows must be opened to connect the excellent ventilation. The filling of liquid nitrogen is a pressurized injection method, in which a flexible hose is connected from a large liquid nitrogen container opening liquid valve, and the liquid nitrogen tank is directly filled with liquid nitrogen. The other kind is directly using the funnel casting method, which is extraordinarily detailed so that the end of the funnel is slightly separated from the neck tube, so that the vapor of liquid nitrogen can escape from the gap between the funnel and the container, otherwise the liquid will flow from the funnel. Overflow will not only increase _ liquid nitrogen loss, but also cause frost damage. The rate of filling the liquid nitrogen should be slow, first inject a small amount, then stop for a few minutes, let it cool down and then gradually fill the volume to 'definite capacity'. Third, when picking up the storage and lifting bucket, the bucket should be slightly improved, so that the bottom of the bucket is separated from the base, and then the bucket is moved parallel to the middle of the tank, and the natural lifting is carried out. The action should be calm and fast, and the force should not be used. In order to avoid twisting or breaking the pain, it is necessary to carefully prevent the inner wall of the neck tube from being touched when the bucket is lifted, so as not to damage the neck tube. The handle should be placed in the indexing ring, and the cover should be covered to avoid running nitrogen. Fourth, the cycle of liquid nitrogen supplementation. How many times does it take for the liquid nitrogen to be phased out? It is usually better to add liquid nitrogen slag to half of the full capacity or just enough to use it for a week. To increase the capacity, the liquid nitrogen tank can be placed on the scale to measure the weight. A liter of liquid nitrogen weighs 0.8 kilograms plus the weight of the canister gives the weight at full capacity, minus the existing weight, which is the capacity that should be added. In order to be light, you can also use a thin wooden stick, insert it into liquid nitrogen for a few seconds, take the agile out of the atmosphere and shake it a few times. The part that inserts liquid nitrogen is hoarfrost due to low temperature, which is very easy to detect in the tank. The stock of liquid nitrogen. 5. When transporting and transporting by vehicle, liquid nitrogen oscillates due to the vibration of the vehicle, which increases growth. The ratio of growth and sorrow varies with the shape of the container. For example, a 10-liter liquid nitrogen tank can be transported for about eight hours per day, and the amount of damage is about 100 grams (including 0.12 liters). If you are stunned, such as 10l, you will lose about 10 grams each time. In order to make the storage low activity and quiet transportation, the liquid nitrogen tank should be covered with a coat or a wooden box, and the liquid nitrogen tank should be prevented from being turned over on the way to avoid generation. Chaos. 6. Washing and drying inside the liquid nitrogen tank: During the utilization of the liquid nitrogen tank, water will be stored inside. It is mixed with bacteria, and there is probably a loss of the handle, and the semen flowing from the handle is mixed into the liquid nitrogen. Liquid nitrogen is an inert substance, and the inside of the container will not be corroded. Due to the above reasons, there is a chance of occurrence of a corresponding level of corrosion. If the mixed bacteria are mixed, the conception rate of artificial insemination will be lowered. Therefore, the inside of the liquid nitrogen tank should be washed and dried one or two times a year. The pace is: 1 Take out the handle and liquid nitrogen from the container and arrange for about two days. The internal temperature of the container rises to this point. °C is similar. 2 Inject the warm water at 40 ° C to 50 ° C or with a neutral detergent into the liquid nitrogen tank, then scrub with a cloth. 3 Wash with water. 4 Reverse the container to dry. The drying method can accept natural air drying or hot air drying. If the latter is accepted, the temperature is limited to between 40 ° C and 50 ° C. The hot air above 60 ° C should be stopped to avoid affecting the performance of the liquid nitrogen tank and shrinking the service life. 7. Liquid nitrogen containers can only be used to hold liquid nitrogen and cannot contain other refrigerants. With the development of the extraction and separation of the active ingredients of medicinal plants, the determination of their composition and structure, and the study of their pharmacological effects, some isolated and purified plant extracts have begun to receive attention. Some companies that produce plant extracts are actively researching and developing such new products, and some larger cosmetic companies have also carried out a lot of research work to separate and prepare pure extracts and apply them to various products. These plant extracts have high active ingredients, do not contain or less contain other irrelevant substances, contain one or several relatively pure components, the content and structure of the components are accurate, and there are clear quality standards and inspections. Methods, products have undergone pharmacological tests, clinical trials and activity tests. The use of such plant extracts is more effective and practical, and it is convenient for product preservation and quality control, but the cost is higher than that of general extracts. The following discusses some of the isolated and purified plant extracts that are used in cosmetics and whose components and structures are well understood. Pure natural plant material,Salicin Extract Ingredients Powder, Factory Price Salicin Powder,Phloretin Extract Price, Olibanum Extract Price Xi'an Henrikang Biotech Co.,Ltd , https://www.henruikangbio.com
Due to the influence of traditional Chinese medicine culture, my country's Plant Extract industry has unique development advantages. With abundant resource advantages and technological advantages, China has become one of the most important suppliers of plant extracts in the world.