1999 UNAM strike council of the university, which includes faculty and students, modified the proposal to make the tuition increase voluntary. Barnés declared that the conscience of each student would dictate who would pay increased tuition and who would not. Strikers grew increasingly belligerent and had violent altercations with students who were still attempting to enter the campus to try to resume classes. Meanwhile, UNAM issued multiple warrants against strikers who were accused of stealing computers, vehicles and earthquake monitoring equipment. The strikers took advantage of the situation to resist additional graduation requirements such as tougher examinations and time limits for graduation. When
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