Disadvantages Of Microorganisms

709 Words3 Pages
Microorganisms are microscopic, living organisms that cannot be seen with the naked eye. They include bacteria, fungi, protozoa and microscopic algae. For growth, various conditions must be met for each microorganism. These conditions generally include adequate nutrient supply, energy, and suitable environmental conditions. These needs are as a result of their adaptation and therefore microbes exist in their varying environs that meet these requirements. In order to accommodate proliferation in a laboratory setting these general and sometimes specified conditions must be replicated. This is done through what is known as a culture medium. A culture medium is an aqueous solution to which have been added all the necessary nutrients and successfully accommodates the growth of microbes. It contains water, a source of carbon & energy, source of nitrogen, trace elements and some growth factors. Ingredients are: Agar, a solidifying agent which is obtained from a variety of sea weeds and is available in powder form or as shreds. Agar is mainly consisted of: A long-chain polysaccharide, consisting of D-galactopyranose units; a variety of inorganic salts, minute quantities of protein-like materials, traces of long-chain fatty acids; and Minerals, such as calcium and magnesium. Agar is a gel at room temperature, solidifying at 32-40°C and remaining firm at temperature as high as 65°C. Agar melts at approximately 85°C. Few microbes can degrade agar, so it is of great value to the field
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