culture media

Sterilization by heat

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Sterilization means the freeing of an article from all living forms that includes viruses, bacteria and their spores, fungi and their spores, both pathogenic and non-pathogenic forms. There are four different methods of sterilization. They are a) Heat b) Filtration c) Irradiation d) Chemical disinfection. The most widely applicable and reliable method is sterilization by … Read more

Bacterial growth curve

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Nutritional environment regulates the bacterial growth. When a bacterium inoculated in a suitable liquid medium is incubated, its growth leads to an increase in the number of bacterial cells which follows a definite course. When bacterial count of such culture is determined periodically and plotted, a curve is obtained i.e. called growth curve. The growth … Read more