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.
The Taft-Hartley Act was the first major revision to the Wagner Act, and after much resistance from labor leaders and a veto from President Harry S. Truman, was passed on June 23, 1947. The Taft-Hartley Act provides for the following: