In laboratories, the most common experimental objects are cells. The safety of cells is related to the accuracy of experimental results. Therefore, they need to be stored in a low-temperature environment. At this time, experimenters usually choose a cell freezing container, using -196�° liquid nitrogen to maintain low temperature. Its vacuum structure can provide a stable low-temperature environment for cells. However, there are also disadvantages. Liquid nitrogen is easily volatile. Although the vacuum structure can effectively reduce it, the surrounding environment will also have an impact. Therefore, when using cell freezing containers, there are requirements for the storage environment. Ambient temperature requirements: A suitable temperature will reduce the volatilization of liquid nitrogen, while an excessively high temperature will accelerate the volatilization. Just like summer and winter, the temperature difference between the two seasons is large, and the volatilization in summer will be much higher than that in winter. The suitable temperature for cell freezing containers is about 20�°, and they can be stored in a cool room or dark place, away from direct sunlight and high temperature environments, to reduce the impact of heat on the tank. Ventilation requirements: It should be placed in a well-ventilated area, away from sources of fire and flammable materials. In order to prevent the discharge of volatile liquid nitrogen, the environment is too sealed and cannot dissipate quickly. It also competes with oxygen for space, causing workers to suffer from hypoxia and suffocation. Storage requirements: The inner and outer bladders of the container are only connected by the neck tube, which is relatively fragile. To prevent the neck tube from rupturing due to stress, we should store it vertically. At the same time, pay attention to avoid collisions during the movement of the jar to prevent the neck tube connection from falling off and causing damage to the vacuum. This is the storage environment requirement of cell freezing containers.
Simmental cattle are an excellent breed of cattle. Livestock farmers will buy Simmental cattle frozen semen and cross-breed them with local cattle to improve the quality of cattle and gain greater breeding benefits! The purchased frozen beef semen cannot be stored in a normal temperature tank. What kind of tank should be used to store it? â??â??Semen storage tank! After Simmental cattle semen is extracted, it will quickly become inactive at room temperature and cannot be used. However, through the semen storage tank, the semen is specially treated and soaked in liquid nitrogen. The deep low temperature of liquid nitrogen -196�° can be used to preserve sperm for a long time. Activity, wait until use before taking out and thawing. Specific steps for thawing frozen cattle semen for breeding: 1. Lift the bucket to the mouth of the jar and use long tweezers to quickly pinch out the frozen wheat tube; 2. Dissolve the frozen wheat tube in warm water at 30-40�°C, and take it out when it is half melted; 3. Check the sperm activity. If the activity is above 0.3, the breeding success rate is high and it can be used for insemination. 4. Load the semen into the gun and output it as soon as possible. Do not store it for a long time. Notice: Insemination time: The appropriate insemination time is after the cowâ??s estrus period, when the breeding success rate is higher. Storage time of frozen semen at room temperature: After thawing, the longer the frozen semen is stored at room temperature, the lower the activity. Therefore, it should be thawed and infused immediately to avoid long-term storage or repeated freezing.
When there are a large number of stem cell samples that need to be preserved, whether it is the founder of the cell bank, the manager of the hospital blood bank, or the personnel of the preservation center, they all choose a specialized cell storage tank - a gas-phase liquid nitrogen freezer. This liquid nitrogen container Can popular branch! Because it has the advantages of large capacity, small daily evaporation loss of liquid nitrogen, safe and reliable use, and easy operation. In addition to stem cells, it is also suitable for the long-term static storage of various tissues and organs such as plasma, semen, and embryos. Originally made for the storage of plasma and stem cells, it has been widely recognized and favored by blood stations, cord blood banks, sperm banks and other institutions since its launch. What are the advantages of using a gas-phase liquid nitrogen freezer to preserve stem cells? 1. The tank body is made of high-quality stainless steel, with polished surface, good load-bearing, low temperature resistance and corrosion resistance; 2. The tank mouth is designed with an offset structure, large capacity, high vacuum, and low liquid nitrogen loss; 3. Two storage methods, gas phase and liquid phase, can maintain a low temperature environment of -190�° on the top of the jar; 4. Rotating trays are used internally for partitioned storage, making it easier to take out cells; 5. It has an intelligent monitoring system and can modify parameters in the settings according to needs; 6. The system can display high and low liquid levels in real time. Ultra-high and ultra-low will provide liquid level alarms, over-temperature alarms, and automatic control of fluid replenishment; 7. It has a hot gas bypass leakage function in the pipeline. The hot gas in the pipeline will not enter the tank during liquid replenishment, ensuring a low-temperature storage environment to the greatest extent; 8. It has a cover-opening and defogging function, which makes it easy to see the stored items and make them easy to extract;
The stainless steel liquid nitrogen tank is also a self-pressurizing liquid nitrogen tank. The tank itself has a pressurizing system and is adjusted through a pressurizing valve. When the booster valve opens, the pressure increases, and when it closes, the pressure decreases. During use, what is the reason why the booster valve is opened but unable to boost pressure? The reasons why the pressure does not rise after the booster valve of the self-pressurized liquid nitrogen tank is opened are as follows: 1. The booster valve is damaged When the vent valve and the inlet and outlet valve are closed, and the pipeline is unobstructed but does not pressurize, it means that there is a problem with the booster valve itself and the booster valve needs to be replaced. You can contact the manufacturer for replacement. 2. Pipe blockage The main reason for pipeline blockage is that external air and moisture enter and are not discharged in time. Under the influence of low temperature in the tank, they condense into ice and block the pipeline. The correct way to clear the pipe is to use hot nitrogen or hot air to blow away the ice and clear the pipe. After unblocking, it is recommended to transport liquid nitrogen to test whether it is unblocked. Do not use tapping to unblock. 3. Insufficient pressure Check whether the pressure in the liquid nitrogen tank is sufficient. If the pressure in the liquid nitrogen tank is too low, the pressure cannot be increased even if the pressure increase valve is opened. 4. Container leakage The container leaks and the vacuum is destroyed, which will also result in the inability to pressurize. It is easy to judge whether the container is leaking. You can observe the frosting phenomenon on the tank body. The location of a large area of frost is the leakage location. At this time, the jar can no longer be used normally. You can contact the manufacturer for after-sales treatment. In short, there are many reasons why the pressure does not rise after the booster valve of the self-pressurizing liquid nitrogen tank is opened. Check them one by one to find out and solve the problems.
Livestock liquid nitrogen tank, as a low-temperature container, is usually used to store animal semen. During storage, liquid nitrogen is used as the refrigeration medium. However, the temperature of liquid nitrogen is -196C, and its volatile nature is its constant attribute. Therefore, when the staff opens the liquid nitrogen tank to take out the frozen semen, the contact heat increases as the residence time increases. The sample placed in the bucket will be exposed to part of the normal temperature after being taken out, and the temperature will gradually rise. If it is placed in the liquid nitrogen tank again, the volatilization of liquid nitrogen will also be accelerated. However, the loss of frozen semen is normal. Frequent users know that we only need to replenish liquid nitrogen in time to ensure the safety of frozen semen in livestock liquid nitrogen tanks. When it comes to rehydration, there are many ways to replenish liquid nitrogen, including pouring it directly yourself, or using tools such as liquid nitrogen pumps and liquid nitrogen supply tanks. Among them, liquid nitrogen pump is a common and practical "liquid replenishment artifact". It is divided into two types: foot pump and automatic pump; their pump bodies are made of stainless steel, which are easy to operate, beautiful and durable. How to use liquid nitrogen pump: 1. Close the liquid nitrogen pumpâ??s liquid outlet valve; 2. Insert the liquid inlet of the liquid nitrogen pump into the neck of the jar and turn it clockwise until it is tight; 3. Also insert the liquid nitrogen pump outlet into the tank, and seal the liquid nitrogen pump and neck tube with a sealing ring; 4. If it is a foot pump, you can control the liquid discharge by simply stepping on it; if it is an electric pump, you can control the discharge of liquid nitrogen through the mobile phone APP. Generally speaking, the foot pump has a liquid output of about 5L per minute, and the mechanical pump has a liquid output of about 8L per minute. Note: Whether it is a foot-operated or mechanical liquid nitrogen pump, the diameter of the tank is required to be 50mm and the volume is greater than or equal to 10L. Liquid nitrogen tanks that do not meet the conditions cannot be used.
Our coconut oil is produced from raw coconut milk. We do this by centrifugal separation and vacuum cleaning without heating. We know how to extract all fractions of water from oil without heating and this is the most important step to obtain premium quality, few people can repeat our quality. Mostly oils are made from already dried coconut raw materials: from dry chips, copra or desiccated coconut, but this is always low-quality oil and does not have a high biological value. We take fresh organic coconuts, extract the raw coconut pulp, make coconut milk from it and separate the oil from this fresh and raw milk without heating. And imagine that the whole process takes place without stops and delays, conditionally after the start of production in an hour in the jar we clog the freshest, crude and raw oil. For 1 liter of oil we take 13 fresh coconuts. Our oil is tastier, more fragrant, fresher - and it is noticeable immediately. We can send samples so that the chief food technologist of your company can test and everyone will be convinced of this. The other, invisible part is utility. Our oil contains 50-52% lauric acid and 64% MCT of medium-chain fatty acids, which are very useful for the body. Many articles and books have been written about the benefits of coconut oil. We can collect such conclusions and use them for marketing: Strengthens the immune system, Improves hormonal balance, Stimulating the metabolism, Increases the energy level, Fights germs and viruses , Protects the heart - improves the cholesterol ratio, Improves digestion and absorption of nutrients, Supports thyroid function, Helps in weight loss by reducing visceral fat, Improves insulin secretion and blood glucose utilization, Blocks the harmful effects of many toxins and free radicals, It helps in the treatment of degenerative, autoimmune diseases. Does not oxidize fast, Does not emit carcinogens. It is natural antioxidant, antiseptic. It is an alkaline product. Relieves chronic inflammation. All that means that coconut oil not only a delicious food but also a Universal natural medicine.
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Silicon slag is a grayblack granular solid waste produced by partial oxidation and partial reduction of silicon materials at high temperatures Silicon slag mainly comes from silicon material processing processes in the metallurgy and semiconductor industries such as silicon wafer slicing ferrosilicon smelting and other processes The main components of silicon slag are SiO2 and a small amount of FeO Al2O3 CaO and other elements and oxides 1 Make cement Silica slag can be used as an additive in cement clinker to replace some materials such as plaster of paris or fly ash in cement clinker Silica slag can promote the hydration reaction of cement clinker and enhance the early strength and longterm performance of cement 2 Making glass Silica slag is an important raw material for glass manufacturing It can replace part of the raw materials such as quartz sand and sodium carbonate reduce the cost of glass production and at the same time improve the quality and weathering resistance of the glass 3 Manufacturing Ceramics After silicon slag is mixed with materials such as alumina calcium oxide and magnesium oxide highperformance refractory ceramic materials can be prepared These materials have excellent properties such as hightemperature fire resistance high strength and wear resistance and are widely used in hightemperature furnaces chemical equipment and other fields 4 Manufacturing building materials Silica slag can be used as a raw material for manufacturing building materials such as building bricks sound insulation panels and thermal insulation materials Building materials made of silicon slag have high strength wear resistance fire resistance and other properties and also have good heat and sound insulation properties 5 Other uses Silicon slag can also be used to manufacture graphite electrodes iron oxide pigments electrical insulation materials and other products In addition silica slag can also be recycled such as used to make road hardeners lowcarbon cement etc
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