eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2015-03-26 3 2 431 434 1643 article Iram mehraj 1 C.N. Latha 1 Department of Biotechnology, Vydehi Institute of Biotechnology, Bangalore (India). All the nutrient agar cultures were incubated for the growth of microorganisms exposed for different periods of time. The degree of growth in tabular form was recorded. The killing efficiency of UV rays to the time of exposure of the various microbes and the effect of UV rays when they pass through glass was tested.Unlike higher animals, bacteria do not have a nucleus bacteria DNA is free floating. UV light will not penetrate very far into the bacteria so the exposure must last long enough for the bacteria to turn, and DNA to move close to the surface, for the UV light to destroy the DNA. https://biomedpharmajournal.org/vol3no2/effect-of-uv-rays-265nm-to-determine-the-minimum-amount-of-exposure-required-to-effect-a-100-kill-of-the-organism-bacillus-cereus-an-endospore-former-and-staphylococcus-aureus-a-non-endospore-fo/ Bacillus cereus Staphylococcus auerus UV light