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.
Eight Shot Dead: 2016 Sees Year-Over-Year Spike In Cops Killed By Gunfire. Already this year, eight on-duty police officers have been killed by gunfire â including five this week alone. The 2016 gunfire fatalities mark a notable increase from the same Jan. 1 through Feb. 11 period last year, when just one officer was shot dead, according to the National Law Enforcement Officers Memorial Fund. In total, 11 officers have died this year, versus 13 officers in the same time frame last year.