activator - (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription. 1  substance - the real physical matter of which a person or thing consists; DNA is the substance of our genes.
In 2006, in cases where police officers intentionally fired a gun at a person, they discharged 364 bullets and hit their target 103 times, for a hit rate of 28.3 percent, according to the departmentâs Firearms Discharge Report. The police shot and killed 13 people last year. In 2005, officers fired 472 times in the same circumstances, hitting their mark 82 times, for a 17.4 percent hit rate. They shot and killed nine people that year.
The average amount of time it took a police officer to respond to a 911 call reporting a crime in progress was 10.3 minutes in fiscal 1999, up from 9.8 minutes the year before, according to statistics released this week by Mayor Rudolph W. Giuliani.ow that more officers are out on anti-drug initiatives, the argument goes, they are not in patrol cars, available to respond to 911 calls. Police officials have long credited this special-unit strategy with preventing crimes.