**Meet the editors**

Prof. Margarita Stoytcheva has graduated from the University of Chemical Technologies and Metallurgy of Sofia, Bulgaria, with titles Chemical Engineer and Master of Electrochemical Technologies. She has PhD and DSc degrees in chemistry and technical sciences. She has participated in research and teaching in several universities in Bulgaria, Algeria, and France. From 2006

to the present, she has participated in activities of scientific research and technological development and is teaching at the Autonomous University of Baja California at Mexicali, Mexico, as a full-time researcher. Since 2008, she has been a member of the National System of Researches of Mexico, and since 2011, she has been a regular member of the Mexican Academy of Sciences. Her interests and area of research are analytical chemistry and biotechnology.

Dr. Roumen Zlatev is a full-time researcher in the Engineering Institute of the Autonomous University of Baja California (UABC) at Mexicali, Mexico. He obtained his Bachelor's and Master's degrees from the University of Chemical Technology and Metallurgy of Sofia, Bulgaria, and his PhD degree from the National Polytechnic University of Grenoble, France. He was a full-time

researcher in the Bulgarian Academy of Sciences and a part-time professor at the Sofia University. In 2005, he accepted the position of full-time senior researcher in UABC. Dr. Zlatev is a member of the Mexican National System of Researchers and a regular member of the Mexican Academy of Sciences. He has participated in research projects in France, Germany, and Mexico. He is the author of more than 170 publications, book chapters, and reports in scientific congresses and he holds 14 patents in the field of the electrochemical and spectroscopic methods of analysis, corrosion and materials, electrochemical and analytical instrumentation.
