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Nowadays, words such as "human-centered lighting", "day and night lighting" and "biological lighting" are often found in the newspapers. In fact, no matter what the word is, it is nothing more than saying that properly dimmed lighting can create ideal conditions for human beings within 24 hours. And no...
Sources of 1. VOC At present, the oil collected by domestic gas stations is mainly gasoline. Due to the low boiling point of light oil products such as gasoline and its own volatile physical characteristics, the production of hydrocarbon VOC in gas stations is inevitable. Under normal circumstances, the normal operation of the gas station VO...
With the development of many electronic products in the direction of small, light and high density, especially the extensive use of handheld devices, the original SMT technology has been challenged in terms of component materials and technology, which has led to the rapid development of SM...
At present, hydrogen energy, as a kind of secondary energy with rich sources, green low carbon and wide application, has become a promising outlet in the field of new energy. Hydrogen has been discovered since 1766 and has been widely used for its powerful uses, including the following aspects...
At about 13:40 on January 10, a gas explosion occurred on the 5th floor of Building 23, Lane 96, Heping South Street, Heping District, Shenyang City, Liaoning Province, and then caught fire. On December 25, 2023, a fire broke out in a house in Yangzhou, Jiangsu. It is reported that, at that time...
The iron and steel industry is also known as the black metallurgical industry. The iron and steel industry is an important basic industrial sector and the material basis for the development of the national economy and national defense construction. The level of metallurgical industry is also a measure of a country's industrialization. steel smelting is a very...
With the development of modern biotechnology, biosafety has attracted the close attention of scientists and technicians in the field of biology. Generally speaking, for the safety of biological experiments, the experiment is usually carried out in a clean room. clean room refers to when the air cleanliness reaches the provisions of...
Generally speaking, the tunnel is a kind of building structure closed by itself, its own environment is more complex, and the ventilation and drainage equipment is not perfect. In addition, the influence of the environment in the subway tunnel on the rails and accessories laid in it is long-term. According to the existing main...
Mine mining is a comprehensive project involving many aspects. It not only includes public transportation, mining, ventilation, etc., but also includes enterprise management, blasting, machinery, ecological environment protection and many other contents. Compared with other industries, there are many unsafe...
Hydrogen cyanide (HCN), 27.03 molecular weight, is a colorless transparent liquid, boiling point 25.7 ℃, relative density 0.6884, with bitter almond flavor, is a highly toxic chemical, so that it will be limited in transportation and use. In view of this...
Why does 3D printing need to monitor oxygen? The metal 3D printing process involves using laser technology to fuse fine metal powders together layer by layer. In the manufacture of parts at the same time to reduce the risk of impurities to a relatively low metal additive manufacturing industry is facing the main...
The high closure of modern houses makes life more comfortable, more secretive and more energy-efficient, but the carbon dioxide and water vapor generated by human breathing; formaldehyde and MOM generated by building materials, homes, curtains, etc.; dust generated by clothes and bedding; human body, smoking, cooking...
At present, the refrigerant widely used in air-conditioning equipment is chemically stable and non-flammable (A1) Freon. Therefore, even if the refrigerant leaks to the outside of the air-conditioning equipment, there is no need to worry about safety issues such as fire. However, non-combustible (AI) freon...
Hydrogen chloride, also known as hydrochloric acid, chemical formula HCL, is a colorless irritating smell of gas and corrosive. concentrated hydrochloric acid has a strong volatile, leakage of words on the human respiratory tract, mucous membranes, skin, eyes and other irritating role, also has a suffocation...
In recent years, large-scale and ultra-large-scale integrated circuits have developed rapidly, and the research and development and production technology related to the semiconductor field are also developing rapidly. In the field of semiconductors, the manufacturing process of large-scale integrated circuits cannot be separated from lithography and etching technology, which is a fine circuit...
Environmental protection monitoring first, automation, information is the premise and guarantee of environmental monitoring. With the rapid development of the local economy, environmental pollution incidents such as water, gas, and noise continue to appear in various regions, which have seriously affected people's quality of life...
Cultural relics carry the civilization and history of a nation, and the protection of cultural relics is very important for the inheritance of historical civilization. Cultural relics are irreplaceable and cannot be restored once they are damaged. preservation of cultural relics for its sealing requirements are very high, the need to maintain the unique cultural relics...
1. what is an incubator? incubator, refers to the temperature controllable, mainly used for the cultivation of microorganisms, plant and animal cells of the box device, some with refrigeration and heating bidirectional temperature control system, is biological, agriculture, medicine, environmental protection...
The working principle of 1. electrochemical oxygen sensor The electrochemical oxygen sensor converts the oxygen concentration into an electrical signal for quantification through electrochemical reaction. Specifically, when the oxygen molecules in the mixed gas pass through the semi-permeable membrane on the side of the sensor...
What is nitrogen oxides (NOx) Nitrogen oxides are compounds composed of only nitrogen and oxygen, such as nitrous oxide, nitric oxide, nitrogen dioxide, nitrogen trioxide, nitrogen tetroxide, nitrogen pentoxide, and so on. In these gases...