Rhizosphere

The rhizosphere is a term, which was first introduced by a scientist L.Hiltner. It is the region that is a few distances (2-80mm) extended from the root system. It can also define as a zone, which favours the physical and chemical activity of the microorganisms and responsible for the intense microbial activity. The rate of …

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Cyanobacteria

Definition: Cyanobacteria represents the major group of photosynthetic bacteria, which can carry out the oxygenic photosynthesis. It releases oxygen and uses water as an electron-donating substrate, i.e. splits water molecule to release oxygen. Other than this, they are also capable of fixing nitrogen. Classification of Cyanobacteria Kingdom: Monera Division: Eubacteria Class: Cyanobacteria Examples: Nostoc sp., …

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Spoilage of Milk

Definition: Any undesirable change or deterioration in the quality of milk is called Spoilage of milk. These changes can be like an unpleasant appearance, colour, odour, taste etc. Milk contains a complex biochemical composition and a high water activity, due to which it provides an excellent culture medium for the growth and multiplication of microorganisms …

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Difference Between Antigen and Antibody

The difference between antigen and antibody is mainly due to the following factors like functional role, specificity factor and foreignness. Functional role: Antigen incites the immune system, whereas the antibody is produced in response to a specific antigen. Specificity factor: Both antigen and antibody are specific. The specificity of antigen is due to the presence …

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Staining

Definition: Staining is a method of imparting colour to cells, tissues or microscopic components, so they are highlighted and visualized better under a microscope. There are a variety of staining methods like simple, differential and special staining, which are used for various purposes ranging from the study of microscopic organisms to cellular structures, metabolic processes, …

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