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sunblock lotion - hoxgene1

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sunblock lotion - hoxgene1
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#1
04-28-2008, 08:46 AM
what is the chemical substance used to block UVB rays
any body???
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#2
04-28-2008, 08:50 AM
http://www.dermatology.ucsf.edu/skincanc...creen.aspx
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#3
04-28-2008, 08:56 AM
thnx jazz


for exam purpose we need to remember which of these
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#4
04-28-2008, 09:35 AM
Zinc oxide
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