Basic nutrients for microbial growth

, according to the physical state of the microbial medium:medium can be divided into solid medium, liquid medium and semi-solid medium according to its physical state(1) solid mediumIs in the medium to add coagulants, there are agar, gelatin, silicone and so onSolid media are often used in microbial separation, identification, counting and syb preservation(2) semi-solid mediumIs a small amount of coagulant added to the liquid medium and is semi-solidIt can be used to observe the movement of bacteria, identify the species and determine the efficacy of phages(3) liquid mediaNo coagulants are in the liquid mediumThe composition of this medium is uniform, microorganisms can fully contact and use the nutrients in the medium, suitable for physiological and other research, due to the high fermentation rate, easy to operate, but also often used in the fermentation industry, according to the type of microorganism classification:the medium according to the type of microorganism can be divided into bacterial media, line-in-line media, yeast media and mold media and other four categories(1) the commonly used bacterial medium has a nutritious broth and agar medium(2) commonly used line-of-line bacteria medium for Gaussian No1 media(3) the commonly used yeast medium has a potato sucrose medium and a malt juice medium (4) commonly used mold media are potato sucrose medium, bean sprout juice sucrose (or glucose, glucose is more expensive) agar medium and Tsashi medium , classified according to microbial medium use: medium media according to its special use can be divided into basic media, rich media, selective media and differential media (1) base media It is a medium containing the basic nutrients needed for the growth and reproduction of general microorganisms The beef paste protein medium is the most commonly used base medium (2) plus rich media It is a medium made from blood, serum, animal and plant tissue extraction in the base medium Used to train some of the more demanding microorganisms (3) selective media Is the addition of special nutrients or chemicals in the ordinary microbial medium to inhibit the growth of unwanted microorganisms, conducive to the growth of the desired microorganisms Used to separate one or another type of microorganism from a mixed microbial population