Testing Various Disinfectants On Bacteria Covered Toothbrushes

804 Words4 Pages
Grace Crecelius
Research Paper

Disinfectants vs. Bacteria This project involves testing various disinfectants on bacteria covered toothbrushes to see which method is most effective. The three main methods of disinfectants are hydrogen peroxide, U.V rays to kill bacteria, and antibacterial soap. Learning what is in the various disinfectants that eliminate bacteria is beneficial to understanding the experiment. Bacteria are single-celled organisms that reproduce quickly. Pathogens are bacteria that cause sickness. Once the body is infected with pathogens, those bacteria reproduce and grow inside of cells in the body. As they grow, certain bacteria can make toxins; those toxins can damage the body’s cells. Symptoms of a sickness
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Triclosan is hydrophobic, which means it does not dissolve well in water. However, triclosan does go through fatty substances like membranes of bacterial cells. Triclosan interferes with its target cell’s regulating gene. In this case, the triclosan would interfere with the bacteria cell’s regulating gene that carries out processes. Once in the microbe bacterial cells, triclosan poisons a specific enzyme that is used in making the microbe cell membranes. Even one molecule of triclosan permanently impedes the microbial enzyme. Triclosan is a strong antibiotic, even at low concentrations. The next source of disinfectant in the experiment is U.V light. U.V light is invisible radiation. Non-ionizing radiation from the U.V light brings a mutagenic effect by provoking electrons in molecules. Non-ionizing radiation means that there is not enough energy for electrons to be removed from atoms. The text states, “The excitation of electrons in DNA molecules often results in the formation of extra bonds between adjacent pyrimidines (specifically thymine) in DNA.” (Furlong). Whenever two pyrimidines are bonded, it is called, pyramiding dimer. Dimers can change the shape of DNA is a cell, in this case bacteria cells, and can cause issues during replication. The bacteria cell might try to rebuild the pyramiding dimers previous to replication, but the repair mechanism can
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