Dielectric properties of pulque at different temperatures from 0.1 to 25 GHz

Abstract

For industrialized processes, microwave techniques for quality control and pasteurization methods may be required. For this reason the precise knowledge of the dielectric characteristics of foods are of prime importance. In this paper, we present the dielectric properties of pulque, a Mexican traditional drink. Three different pulque flavors (natural, strawberry and coconut/pineapple) are reported from 100 MHz to 25 GHz using an open-ended-coaxial probe and a vector network analyzer. This characterization was carried out for temperatures ranging from 20 to 70° C in steps of 10° C.

Keywords:

• Dielectric properties
• food characterization
• microwave pasteurization

Additional information

Notes on contributors

Tejinder Kaur Kataria

Tejinder Kaur Kataria obtained her BSc from Punjab Technical University, Jalandhar in 2003, her MSc and PhD from the National Institute of Astrophysics, Optics and Electronics, Mexico, in 2007 and 2011 respectively. From 2011 to 2015 she was a Lecturer at the University of the Anericas, Mexico. From 2015 to 2016 she was a psodoctoral research fellow at the National Institute for Astrophysics Optics and Electronics, Mexico. Since 2016 she is a professor she has been a Professor with the Electronics Department, DICIS, Guanajuato University.

Maria Elena Sosa-Morales

Maria Elena Sosa-Morales obtained her BSc from the University of Guanajuato, Mexico in 1996. Her MSc from the University of the Americas, Mexico in 1999; and her PhD degree from the Veracruz Intitute, Mexico in 2009. From 2009 to 2014 she was a professor at the University of the Americas, Mexico. SInce 2014 she is a professor at the Food Engineering Department, DIVICA, University of Guanajuato, Mexico.

Jose Luis Olvera-Cervantes

José Luis Olvera-Cervantes received the B.Sc degree in physics and mathematics from the National Polytechnic Institute (IPN) in Mexico D.F. in 2001 and M.Sc. and PhD degrees in Electronic and Telecommunications from CICESE research center Ensenada B.C. Mexico (2005 and 2008 respectively). From 2009 he he joined the National Institute of Astrophysics, Optics and Electronics, Mexico, where he is currently a researcher at the Electronics Department.

Roberto Rojas-Laguna

Roberto Rojas-Laguna was born in 1970. Hereceived the B.S. degree in communications and electronics engineering and the M.S. degree in digital systems from Guanajuato University, Salamanca, Mexico, in 1993 and 1995, respectively; and the Ph.D degree in optics from the National Institute for Astrophysics Optics and Electronics, Mexico, in 1999. Since then, he has been a Professor with the Electronics Department, DICIS, Guanajuato University. His research interests are in the areas of nonlinear fiberoptics, electronics, and sensor devices.

Alonso Corona-Chavez

Alonso Corona-Chavez, Dr. Corona obtained his BSc. in Electronics Engineering from ITESM, Mexico and his PhD from the University of Birmingham, UK in 2001. From 2001 to 2004 he was a microwave engineer for CryoSystems Ltd (UK). Moreover, he was an Honorary Research fellow at the Electrical Engineering Department of the University of Birmingham, UK (2001-2004). In September 2004 he joined the National Institute of Astrophysics, Optics and Electronics, Mexico, where he is currently a researcher at the Electronics Department. In April 2009 he was awarded a Fulbright fellowship to carry out research at the Electrical Engineering Department, UCLA. From 2014-2015 he was a visiting professor at Queens University, Canada; and from 2016-2017 he was a professor at the University of Guanajuato. Dr. Corona is a member of the National Systems for Researchers (SNI), Senior Member IEEE and IET member.