The Application of Nitrogen in various industries
Editor:adminClick：
Time:2018-04-03 17:47
The Application of Nitrogen in various industries
In the national economy and daily life, nitrogen has a wide range of uses. First of all, using its “loose personality” feature, we fill it in a light bulb to prevent oxidation of tungsten filaments and slow down the volatilization rate of tungsten filaments, prolonging the service life of the bulbs. It can also be used instead of inert gases as shielding gases when welding metals.
In the museum, some precious and rare pages and scrolls are often kept in nitrogen-filled cylinders, so that the maggots can be suffocated in nitrogen.
Utilizing nitrogen to make grains in dormant and hypoxic state and having slow metabolism, good pest control, mildewproof and anti-degeneration effects can be obtained, food is not polluted, management is relatively simple, and the required cost is not high, so it has progressed rapidly in recent years.
At present, countries such as Japan and Italy have entered a stage of small-scale production trials. In recent years. In many areas of China, nitrogen is also used to preserve the grain, which is called "vacuum nitrogen storage" and can also be used to preserve fruits and other agricultural and sideline products. Using liquid nitrogen to cool the scalpel becomes a "cold knife."
Doctors use “cold knife” surgery to reduce bleeding or not bleeding. Patients can recover faster after surgery. The use of liquid nitrogen for the treatment of skin diseases in patients is also effective. This is because the vaporization temperature of liquid nitrogen is -195.8°C. Therefore, skin diseases used for the treatment of superficial skin diseases are often easy to make the skin of the lesions necrotic and fall off.
In the past, dermatology often used “dry ice” to treat hemangiomas. Although the intention was the same, the degree of cold was far less than that of liquid nitrogen. The "pneumothorax surgery" to treat tuberculosis is also to inject nitrogen (or air) into the thoracic cavity of a tuberculosis patient and compress the lobe of the lesion to make it rest. Now, people also use the low temperature produced by liquid nitrogen to preserve sperm from well-produced livestock, store and transport them, and then thawed and then used for artificial insemination.
For example, the Liquid Fisheries Research Institute of Guangxi Province used liquid nitrogen to preserve eel semen and achieved success. Nitrogen is also an important chemical raw material that can be used to make a variety of chemical fertilizers, explosives, and so on.
Nitrogen is the “base of life”. It is not only a raw material for chlorophyll production by crops, but also a raw material for protein production by crops. According to statistics, crops all over the world have to absorb more than 40 million tons of nitrogen from soil within a year. .
Scientists have great hopes for nitrogen. They believe that rhizobia has a wonderful way to capture the nitrogen in the air and turn it into nitrogen fertilizer. It is because there is a nitrogenase in the body. This enzyme is an expert in the capture of nitrogen. If we can chemically synthesize a large amount of ammonia, will it be easy to nitrify nitrogen into nitrogen?
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