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Investigating The Antibacterial Properties Of A Mouthwash

551 words - 2 pages

Good Essay esp. for an investigation Good Intro to investigationInvestigating the antibacterial properties of a mouthwashIntroductionThe mouthwash under test id Asda Protect. It contains:-· aqua· alcohol· glycerin· polysorbate 20· sodium benzoate· aroma· sodium saccharin· cetylpyridinium chloride· menthol· sodium flouride (0.05%)In this investigation we aim to test the antibacterial properties of this mouthwash treatingit like a disinfectant against three common bacteria which can be safely used in thelaboratory: Escherichia coli, Baccilus Megatherium, and Staphlococcus Albus.Disinfection is a procedure which destroys, inactivates or removes potentially harmfulmicrobes- without necessarily affecting other organisms present; it has generally little orno effect on bacterial endospores. Disinfection often refers specifically to the use of otherchemical agents (disinfectants) for the treatment of non-living objects or surfaces.Ideally disinfectants for general use should be able to kill a wide range of common orpotential pathogens. However, any given disinfectant is usually more effective againstsome organisms than against others, and the activity of a disinfectant may be greatlyaffected by factore such as dilution, temperature, pH, or the presence or organic matter ordetergent; to be effective at all, a disinfectant needs appropriate conditions, at a suitableconcentration, for an adequate period of time. Some disinfectants tend to be unstable, andsome need solubilization in order to be effective. At low concentrations some disinfectantsnot only cease to be effective, they can actually be metabolized by certain bacteriaDinfectants which kill bacteria are said to be bactericidal. Others merely halt the growthof bacteria, and if such a disinfectant is inactivated - e.g. by dilution, or chemicalneutralisation - the bacteria may be able to resume growth; these disinfectants are said tobe bacteriostatic. A bactericidal disinfectant may...

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