英文摘要 |
Recently, more and more public and private libraries purchase UV sterilizer for books so as to enable readers to use whenever they want to. This report not only examines the effect of UV sterilizer to commonly books fungus and bacteria, but also observes the effect of UV sterilizer on paper. The result shows that UV sterilizer can retard fungus growth. The growth rate decreases as exposing time increases. The result of bacteria test shows that UV sterilizer can disinfect Escherichia coli completely. The bacteria liquid 1×10^5 (CFU/ mL)and 1×10^7(CFU/ mL)can disinfect after 120 sec and 200 sec of exposure respectively. Six kinds of paper samples after exposure by UV sterilizer, the result shows that with the increase of UV irradiation time, the whiteness of the paper showed a significant decrease, and the color difference (ΔE*) increased significantly, and the aging sample shows significantly color difference. The test on books shows that UV sterilizer could not wipe out fungus completely, there's still possibility for mold to germinate. |