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单词 activator
释义 activator
[`ak·tǝ´vād·ǝr]
CHEMISTRY
1. A substance that increases the effectiveness of a rubber vulcanization accelerator; for example, zinc oxide or litharge.
2. 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
See <<accelerator>>
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