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why were you told to remove the plate covers prior to exposure them to uv?

Biology
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why were you told to remove the plate covers prior to exposure them to uv?

Apr 28th, 2015

Assuming the plate cover is of steel, you have to remove  this plate because UV radiation cannot penetrate steel easily.

Apr 28th, 2015

thank you so much ! 

Apr 28th, 2015

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Apr 28th, 2015
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