TV UNAM coverage as an over-the-air digital subchannel. TV UNAM is generally on the air daily from 8am to as early as midnight (longer on some nights, especially if there is a movie or concert scheduled). Although XHUNAM-TDT continues to operate on digital channel 20 in Mexico City, it has largely been used for experimental transmissions and does not broadcast the programming of TV UNAM. SPR's Mexico City station XHSPR-TDT carries it on channel 20.1. TV UNAM TV UNAM (stylized as "tvunam" and "tv•unam", formerly written "teveunam") is an educational television network owned and operated by the National Autonomous University of Mexico
School of Chemistry, UNAM and textile manufacturing and some pharmaceutical industries. However, the harsh national and international context, derived from the mexican revolution movement and the World War I affected the availability of highly skilled personnel. Therefore, in January 1913, Juan Salvador Agraz presented an initiative to the mexican president Francisco I. Madero to create the School of Chemistry. On September 23, 1916, the mexican president Venustiano Carranza promulgated by government-decree the foundation of the National School of Industrial Chemistry (Escuela Nacional de Química Industrial, and later Escuela Nacional de Ciencias Químicas or National School of Chemical Sciences) in the town of Tacuba (north-west