1. So far, only nine active agents are selling tickets, " said Hashim. 2. Her women were not passive, but active agents of their love lives. 3. Nowadays, though,-ee nouns have secretly become active agents , performing their own actions. 4. Demonstration of suspected active agents can be done by confirmation of Koch's postulates. 5. The group decided to call the chemicals " hormonally active agents , " instead. 6. Jones became an active agent in the Underground Railroad in 1851. 7. Testosterone, however, is not the active agent within these organs. 8. By 1893, B�chner s was fully involved in seeking the active agent of fermentation. 9. Unlike the related Differential Prediction concept in psychology, Uplift Modelling assumes an active agent . 10. The amine fluorides are thus available as an active agent for a longer period.