Death Rays: What Duration of Ultraviolet Exposure Kills Bacteria? | Carolina.com

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Death Rays: What Duration of Ultraviolet Exposure Kills Bacteria?

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Death Rays: What Duration of Ultraviolet Exposure Kills Bacteria? is rated 4.1 out of 5 by 50.
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In this Science Buddies science project, you will observe the effects of short-term ultraviolet light exposure on bacteria. You can customize this experiment to include the nutrient agar plates, living K-12 E. coli, a glass spreader, and other supplies.

 
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Overview

Ultraviolet light can damage DNA molecules. If a cell's DNA repair mechanisms can't keep up with the damage, mutations are the result. As harmful mutations accumulate, the cell eventually dies. How much ultraviolet light is too much for a bacterial cell?

View the full project, background information, procedures, and more at ScienceBuddies.com

 

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Ratings & Reviews

Rated 5 out of 5 by from Worked Perfectly! We departed from the norm and swabbed high traffic areas in the school as our wild card sampling. Dramatic results, clearly illustrating the importance of just washing your hands and cleaning regularly!
Date published: 2019-03-20
Rated 3 out of 5 by from Grew well... a titer would have been nice Bacteria grew as expected, however I was a little disappointed a titer was not included in the materials sent. Had to figure out on my own... but turned it into an educational opportunity, so all was fine in the end and there were indeed plenty of bacteria. We calculated about 3x 10^8 cfu/ml by the way...
Date published: 2019-03-04
Rated 3 out of 5 by from Nutrient Agar I purchased 3 packs of 10. Each pack had 1 or 2 broken tops; crushed where pieces of the plastic top were stuck in the agar. Fortunately I did not need more than were in great condition.
Date published: 2019-02-11
Rated 2 out of 5 by from Moldy Plates I'm glad that I only needed a few of the plates from this set because several of them had mold when they got to me, and seemed to pass it on to other plates the longer I waited to use them.
Date published: 2018-12-12
Rated 4 out of 5 by from Great customer service! Mold on several plates. Sara answered all of my questions, made great suggestions, and guided me through the process very skillfully. The plates arrived quickly; however, when we opened the lids, we found mold on three of the ten plates. Happy with everything except the mold.
Date published: 2018-11-14
Rated 5 out of 5 by from Arrived fresh The E-coli grew great! My child's project came off without a hitch.
Date published: 2018-11-08
Rated 1 out of 5 by from not sterile plates I bought these plates to save a few minutes before the lab. Unfortunately, the plates were contaminated and not sterile. 24/30 plates have growth on them.
Date published: 2018-10-27
Rated 5 out of 5 by from Prepared Nutrient Agar Plates worked Great! The prepared media plates arrived in a timely manner, very well packaged and every plate was sterile.
Date published: 2018-03-10
  • y_2019, m_4, d_24, h_24
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.12
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