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Chapter 7 The Control of Microbial Growth

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Heavy Metals<br />

Oligodynamic action: toxic effect due to metal ions<br />

combining with sulfhydryl (—SH) and other groups<br />

proteins are denatured.<br />

• Mercury (HgCl 2, Greeks & Romans<br />

for skin lesions); Thimerosal<br />

• Copper against chlorophyll containing organisms<br />

Algicides<br />

• Silver (AgNO 3 ): Antiseptic for eyes <strong>of</strong> newborns<br />

• Zinc (ZnCl 2 ) in mouthwashes, ZnO in antifungal in<br />

paint<br />

Copyright © 2010 Pearson Education, Inc.

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