Translate the given Spanish text to English

Example Input: A catalyst may be used during the process.
Example Output: Se puede usar un catalizador durante el proceso.

Example Input: An apparatus for processing an audio signal is provided.
Example Output: Se presenta un aparato para procesar una señal de audio.

Example Input: These catalysts are made from less expensive raw materials than the common zinc hexacyanocobaltate catalysts, and provide short induction periods and in many cases more controlled exotherms.
Example Output:
Estos catalizadores se hacen de materiales primas menos costosas que los catalizadores de hexacianocobaltato de zinc comunes, y proporcionan cortos periodos de induccion y en muchos casos exotermos mas controlados.