1.Basic concepts of solvent and diluentSolvent & diluent refer to the chemical substances that can reduce the viscosity of resin system, make resin and other components mix better, or make adhesive better applied to the surface of…

 Quality Control of Culture Media for Food MicrobiologyFirst, quality control of culture media for food microbiology in preparation: (1) Container: the flask, plate, test tube and other equipment for preparing and repacking the culture medium shall…