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 Gilbert and Sullivan Story by John Kenrick. Copyright 2000-2003. Beginnings; Trial By Jury; The Sorcerer (All the photos below are thumbnails â click on them to see larger versions.) William Gilbert â Arthur Sullivan â Richard D'Oyly Carte Beginning in the 1870s, three Englishmen -- playwright William S. Gilbert and composer Arthur Sullivan--revolutionized the musical theatre, creating a series of witty, melodic operettas that set a new standard for stage professionalism.