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What is environmental hypoxia, and what concentration does it take to achieve hypoxia

What is environmental hypoxia, and what concentration does it take to achieve hypoxia

Under normal conditions, the oxygen content in the ambient atmosphere is 20.9%. If you are in an environment with an oxygen content lower than 18%, the oxygen intake of the human body is insufficient, the partial pressure of oxygen in the blood is too low, and the hemoglobin is in an unsaturated state, and cells in various parts of the tissue will appear due to insufficient oxygen supply. changes, showing corresponding hypoxia symptoms.

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On the High Accuracy Application of Online Analysis System

On the High Accuracy Application of Online Analysis System

The composition and structure of matter are the first parameters of matter, and the amount of matter composition is the most essential, direct and important information of matter production, and can be considered as the real source of information. Accurate measurement of the amount of substance components is the essential purpose of using online analyzers, and it is a technical problem that the industry and engineering circles are generally highly concerned about. For example, the large-scale document "China Technical Library" in 1999 included "On the High-precision Application of On-Line Analytical Instruments" (1), which made an in-depth discussion on the high-accuracy application of on-line analytical systems.

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