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activator |
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activator [′ak·tə‚vād·ər] (chemistry) A substance that increases the effectiveness of a rubber vulcanization accelerator; for example, zinc oxide or litharge. A trace quantity of a substance that imparts luminescence to crystals; for example, silver or copper in zinc sulfide or cadmium sulfide pigments. (genetics) A molecule that modifies a repressor in a way that enables it to stimulate operon transcription. (graphic arts) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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