1. Geomicrobiology Laboratory; Institute of Metallurgy-DICIM, UASLP; Sierra Leona 550 78210 SLP México
2. Institute of Physics, UASLP; Dr. Manuel Nava 8 78217 SLP México
3. CIACyT; Center for the Innovation and Application of Science and Technology, UASLP; Sierra Leona 550 78210 SLP México