Before the 16th century, the existence of micro-organism had not been discovered. It was until a microscope was invented that micro-organism become a subject of discussion (Barnett 2003). Microbiology is the study of microorganisms or microbes. Microorganisms are the smallest living organisms that cannot be observed with our naked hence they need to be magnified using magnification tools such as microscope. Examples of micro-organisms are bacteria, virus and fungi. Fermentation in simple terms is the conversion of sugar into acid, gases and alcohol by enzymes that act as catalysts (Pumphrey and Julie 1996). Fermentation is a process that occur takes place in ...
Essays on Louis Pasteur
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Pasteurization is a process that involves heating of raw milk to a certain temperature within a given set of time. This process kills harmful bacteria found in unpasteurized milk, for example, Salmonella, Listeria and E coli responsible for food borne illnesses. These bacterial organisms are responsible for human diseases such as Typhoid, diphtheria, Listeriosis and tuberculosis. The process was first initiated by Louis Pasteur in the year 1864. Pasteurized milk can stay for a certain period without refrigeration. However, refrigeration especially after opening the seal, is still necessary because of some nonpathogenic bacteria that because food spoilage and is non-receptive for heating. ...