CHED 819 |
| Audra MacNeil, Michael P. Labare, Lindsey Kracht, and Michael A. Butkus. |
| The bactericidal effects of silver ions have been known since the mid 1800s. Given contact times on the order of hours, silver has been shown to be somewhat effective as a disinfectant against bacteria and viruses. Our work has shown that the presence of 1.0 mg of Ag(I)/L for 24 hours did not inactivate Bacillus subtilis spores at an initial density of 1.8 x 108 cfu/mL. Previous work in our laboratory has shown a synergistic increase in the inactivation of viruses by using silver ions and UV radiation (Appl. Environ. Microbiol. 70:2848-2853 2004). We decided to test the combinations of silver ions with UV radiation and/or high pressures. Exposure to the same concentration of silver ion combined with UV radiation (40 mJ/cm2) did not inactivate the spores. Exposure to 0.1 mg of Ag(I)/L and 1000 psi for 30 minutes also did not inactivate the spores. Our future experiments will test a matrix of higher concentrations of silver ions, greater pressure, increase incubation periods and exposure to UV radiation. |
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Undergraduate Research Poster Session: Environmental Chemistry
2:00 PM-4:00 PM, Monday, 27 March 2006 Georgia World Congress Center -- Ex. Hall B4, Poster
Division of Chemical Education |