The powder is white or colorless monoclinic flakes. Melting point: 38degC (anhydrous), 103.5degC (monohydrate). What is PTSA? PTSA P Toluene sulfonic Acid features a rich and fine foam with low degreasing powers, good biodegradability, and low irr…
What is colloidal silicon dioxide?Colloidal silica is a gaseous silica prepared by hydrolysis of silica compounds. It is a kind of fine silicon that can be uniformly dispersed. It is insoluble in water. Silicon is a natural element in the periodic ta…
Parkinson's disease is a common neurodegenerative disease in middle-aged elderly people. The main pathological change is the degeneration death of dopaminergic neurons in substantia nigra. Therapeutic solutions include drug therapy gene the…
If the compatibility of polycarboxylate superplasticizer and cement is not good, the concrete mixture is prone to some problems, such as segregation, bleeding, greater slump loss, shorter setting time and so on, so that the concrete mixture can not b…