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In this work, a modification of the sugarcane bagasse is performed, in order to obtain organic catalysts. The bagasse analysis is performed using X-ray diffraction (XRD) and Fourier Transformer Infrared Spectroscopy (FTIR), which indicated that characteristic peaks determined its chemical compounds. In addition, Scanning Electron Microscopy (SEM) is used to know the morphology. Finally, a discoloration test is conducted on an azo compound (methylene blue) in an aqueous medium, obtaining an efficiency of 98.6%.

Lighting is a fundamental part in the ergonomic conditioning of workstations; Although, the human being has the ability to adapt to different light conditions, the deficiency in it causes visual fatigue, which can be one of the causes for which workers make mistakes in their activities or even to cause accidents. The present work focuses on an analysis of the lighting conditions in the classrooms, laboratories and cubicles of the faculty of Mechanical and Electrical Engineering, and identify yes, the areas where the visual tasks associated with the workstations have poor lighting or excessive that causes glare, to determine what preventive or corrective measures to take, in order to achieve a safe and healthy environment for the university community. With the help of a luxometer measurements are made to calculate the average illumination (EP) and compare it with the Official Mexican Standard "NOM-025-STPS-2008, Conditions of lighting in the workplace" that establishes the maximum permissible limits ( 500 luxes). The results obtained reflect that not all the mentioned areas comply with NOM-025-STPS-2008.

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