Laboratory refrigerators: What is the optimal blood storage temperature? and why?

A laboratory refrigerator is a device that allows the effective preservation of all types of substances refrigerated in it, whether liquid, solid or homogeneous. This equipment works by lowering the temperature, so it allows to control the effect that it has on the substances whose composition and structure is to be preserved, this is because the lower the temperature will be the rate at which chemical and metabolic reactions occur, which deteriorate the compounds. That is why they are used in the conservation of blood and derivatives, biological liquids and tissues, reagents, chemicals, and bacterial strains.