Catgut suture treatment produces roughly twice the stitch-holding time of plain catgut, but greater tissue inflammation occurs. Full tensile strength is extended to 18–21 days. It is brown rather than straw-colored, and has improved smoothness due to the dry presentation of the thread (plain catgut is wet). It is otherwise similar to plain catgut. Fast catgut suture is heat-treated to give even more rapid absorption in the body. The first known absorbable sutures were made of the intestines of sheep. The manufacturing process was similar to that of natural musical strings for violins and guitar, and also of natural strings for tennis
Musical instrument the twentieth century saw the gradual evolution of synthesizers—instruments that artificially produce sound using analog or digital circuits and microchips. In the late 1960s, Bob Moog and other inventors began an era of development of commercial synthesizers. One of the first of these instruments was the Moog synthesizer. The modern proliferation of computers and microchips has spawned an entire industry around electronic musical instruments. There are many different methods of classifying musical instruments. Various methods examine aspects such as the physical properties of the instrument (material, color, shape, etc.), the use for the instrument, the means by which music is