The following points highlight the three main types of growth that take place in bacteria. The types are: 1. Diauxic Growth 2. Synchronous Growth 3. Continuous Growth. Type # 1. Diauxic Growth (Diphasic Growth): Diauxic growth is a diphasic growth represented by two growth curves intervened by a short lag phase produced by an organism utilizing two different substrates, one [...]
In this article we will discuss about the techniques used for measuring cell numbers and cell mass of microorganisms. Measurement (Count) of Cell Numbers: 1. Breed Method: A known volume of microbial cell suspension (0.01 ml) is spread uniformly over a glass slide covering a specific area (1 sq. cm). The smear is then fixed by heating, stained, examined under [...]
The following points highlight the six main physical factors affecting the growth of microorganisms. The factors are: 1. Solutes and Water Acidity 2. Temperature 3. pH 4. Oxygen Requirements 5. Pressure 6. Radiation. Factor # 1. Solutes and Water Acidity: Water is one of the most essential requirements for life. Thus, its availability becomes most important factor for the growth [...]