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Anti-theft 1) Strengthen defense, check frequently to plug loopholes.2) Non-workers are not allowed to enter the instrument room,…

The safe distance of the warehouse mostly according: The area of each stack should not be greater than…

Ethylene is one of the largest chemical products in the world. A compound composed of two carbon atoms…

Acrylamide Acrylamide is a moderately toxic substance that can be absorbed through the skin and enter the human…

The first report of metal element carcinogenesis was the case report of arsenic carcinogenesis in 1888. For more…

The causes of most safety accidents in laboratories can be summarized into two types: natural disasters and man-made…

(1) Calculate the degree of unsaturation formula according to the molecular formula: degree of unsaturation Ω=n4+1+(n3-n1)/2 where: n4:…

In the hot summer, in addition to the unbearable heat and the harsh sunlight, people can also put…

Extraction is a science, today I will share with you a few special extraction methods, which will definitely…

Because of the principle of entropy increase. The second law of thermodynamics (the principle of entropy increase) tells…