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Old 09-26-2005, 04:40 PM
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Question Effects of hygiene products on the inhibition of bacteria

I'm in the 7th grade, and for my science fair project I'm working with the effects of hygiene products on bacteria (micrococcus luteus). I need some help on a way to measure the amount of killed bacteria (assuming it is killed) and a way to culture it so it would have about the same number of the cells on each paper disc soaked in each product. If you have any suggestions, please tell me. Thank you!
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Old 10-05-2005, 04:59 AM
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Default Bacteria Colony Counting

Because of their very small size, counting the number of bacteria in a sample can be difficult at best. Although direct counts are possible with a microscope, they require a lot of time and expertise. An easier method is to spread bacteria over a wide area (i.e. nutrient agar plate) and count the number of colonies that grow. If the bacteria are spread out enough, each bacterial cell in the original sample should produce a single colony. Usually, bacterial samples must be diluted considerably to obtain reasonable counts.

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Old 10-08-2005, 02:55 AM
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Talking just quoting

I agree with mad scientist it would be very difficult most likely the bacteria would be frozen and slow vanish... I think ...
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