An enzyme is a catalyst that helps to speed up the rate of a reaction by lowering the activation energy of a reaction. There are many enzymes in the human body, without which lots of important reactions would never take place. Cellular respiration is one example of a reaction that is catalysed by enzymes.
Sullivan Act Tim Sullivan, a major Irish criminal passed the Sullivan Act in 1911 to help his constituents rob strangers or to help them against Italian incomers. That is the crux of story that goes with a very early gun control law.
It was widely thought Sullivan was the last of 11 women murdered by the Strangler nearly 50 years ago after Albert DeSalvo confessed to the killings, and an additional two murders, in the 1960s. But he was never prosecuted.