Centrifugation is a useful means of isolating and purifying cellular components because most organelles and macromolecules differ from one another significantly in size and density (and sometimes also in shape, especially in the case of macromolecules). These properties, as well as the density and viscosity of the surrounding medium, determine the rate at which a specific particle will move when [...]
Here is a list of some bacteria and its etiological agents which causes diseases in humans. Also learn about its prevention and control. Shigella: The shigellae are rods, non-motile and Gram-negative. Possess distinctive antigenic structures. Pathogenic, causing dysenteries, or non-pathogenic species, all living in bodies of warm-blooded animals. Found in polluted water supplies and flies. Shigella Dysenteriae: Rods, 0.4 to [...]
Chemical inhibitors are widely used to prevent the spread of disease-causing microorganisms and to preclude the growth of microbes that would cause spoilage of foods or bio-deterioration of industrial products. Such chemicals that kill microorganisms or prevent the growth of microorganisms are called antimicrobial agents. There are many different types of antimicrobial agents employed for the control of microbial growth. [...]