PU synthetic leather (also known as bi-cast leather, bycast leather or artificial leather, sometimes described as split leather) is a material made with asplit leather backing covered with a layer of polyurethane (hence the term PU leather) that is applied to the surface and then embossed.
Constitution Daily. How a C-grade college term paper led to a constitutional amendment. The 27th Amendment is the most recent amendment to the Constitution, and its existence today can be traced to a college student who proposed the idea in a term paper and was given a C by his professor for the idea.
List of amendments to the United States Constitution. Thirty-three amendments to the United States Constitution have been proposed by the United States Congress and sent to the states for ratification since the Constitution was put into operation on March 4, 1789. Twenty-seven of these, having been ratified by the requisite number of states, are part of the Constitution.