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.
Alien and Sedition Acts (1798).In 1798, the Federalist Congress passed four laws to check a perceived French threat during the Undeclared Naval War with France. The Naturalization Act (18 June) extended required residence from five to fourteen years before an alien could become a citizen.