Can uvc rays penetrate a petri dish
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Uv Radiation Damage And Repair Lab Flashcards
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The effects of ultraviolet light on escherichia coli
However the further action towards the use of UV-C radiation to sanitize fish meals seems to be justified. Only limited information about the effect of UV-C on bacterial spores in food products and animal feeds is available in literature. The probable number of all of the studied bacteria was determined with the MPN method in a 3-tube set, making tenfold dilutions of the radiated samples in appropriate media. The observed differences connected with the meal type were not statistically significant , with the exception of bacteria of the genus Enterococcus Table 6. H7 inoculated onto RTE ready-to-eat foods product was 0. By contrast, the lowest UV-C dose Changes in the number of Clostridium sporogenes spores depending on the surface density of the UV-C radiation dose. The highest inactivation rate, however, was observed in the case of enterococci. After the incubation, characteristic black colonies of Clostridium sporogenes were counted on each plate. Among other factors, which may influence the efficiency of spore inactivation, the authors mentioned their initial concentration and identified the bacteria species level. Another possible cause may be some differences in the initial concentration of bacteria and spores in both types of fish meal.
3-UVC has wavelengths of nm and is the most penetrating and dangerous Now that we have discussed the categories of UV rays, we will give the rest of our In the lab experiment today, we want to find the effects of UV irradiation on two species colonies, if grown at 30°C or lower temperatures on agar plates.
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