Advantages And Disadvantages Of Microorganisms

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1. Biofilms Microorganisms, like most other species on this planet, are also well acquainted with the benefits of joining hands together as a single community. Sometimes, in response to various factors, a biofilm may be formed. A biofilm is a community of bacterial cells, enclosed within a self-produced matrix of Extracellular Polymeric Substance (EPS)1. In simpler terms, it means that bacteria can join together on a surface, living or non-living, and form a protective matrix around the entire group. This matrix is generally composed of extracellular DNA, polysaccharides and proteins. Also, the microbial cells growing in a biofilm undergo physiological changes, as a result of which they are different from planktonic cells of the same organism (single-cells that may float around in a liquid medium). Formation of biofilms offers the microorganisms various advantages; it enables transfer and sharing of genetic material, metabolic by-products, it also provides shelter during environmental changes, offers an increased tolerance to antimicrobials and also protection from the immune system of the host organism. Clearly, biofilms are well equipped to cause diseases in various organisms. The microbes attach themselves to surfaces, initially using weak Vander Waal’s forces. However, if they are not separated, they attach…show more content…
Since the voltage is higher, the wavelength of the electron beam is much smaller (from De-Broglie’s relation) and hence, the TEM has a better resolution than the SEM. The resolution of the TEM is about 0.2nm. In this microscope, the image is formed by capturing the transmitted electrons, rather than the scattered electrons. An image-recording system is used, which converts the electron image into some form perceptible to the human eye. It usually consists of a fluorescent screen for viewing and focusing the image and it might include a digital camera for permanent
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