The culture medium refers to a nutrient substrate prepared from a combination of different nutrients, which is used for the growth and reproduction of microorganisms, plants or animals (or tissues), and generally contains carbohydrates, nitrogenous substances, inorganic salts, vitamins, water and other substances. Natural The medium is a medium made of animals, plants or microorganisms including their extracts;Synthetic medium is a medium prepared by artificial design based on the composition of natural medium, simulated synthesis with chemical substances; semi-combined medium is mainly prepared with chemical reagents, and a medium with a small amount of natural ingredients.
In order to study the growth of chicken embryo cells, a medium made by adding a small amount of corn juice to a certain proportion of salt water amino acid solution is semi-combined media according to the above definition.