About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.
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Soap is a surfactant agent, means that it has two different edges...one is polar edge which can bind with water and another one is non-polar edge which can bind with fat tails....
How soap remove microorganisms from our body? well, microorganisms have lipid envelope that surrounds their bodies...and another edge of the soap (polar tail) will get binded with water (that's why after soaping your body, the microorganisms can be easily removed from our body).
For anti-bacterial soap, they (the industries) add the soap components with some kinda bactericide (i.e. Triclosan).
The most common of these anti-bacterial chemicals in soaps is Triclosan. These chemicals kill bacteria in a variety of ways. Some chemically poison the bacteria, some cause it's cell walls to rupture and thereby, kill the bacteria, and some interfere with some of it's chemical process by preventing the movement of sodium or inhibiting other pathways.
Refer to General Biology and the denaturation of proteins. There are two ways this process occurs, temperature and pH. Soap causes a change or rise in pH in the environment surrounding the proteins comprising the bacterium and the use of warm water assists as a catalyst thus rendering the proteins nonfunctional through unfolding.
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