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Associate researchers

Alejandra Torres Mediano

Phone(s): (56-2) 7184510 , (56-2) 7764796 (Fax)
Laboratorio de Envases. Universidad de Santiago de Chile.
Obispo Manuel Umaña 050, Estación Central, Santiago, Chile.

Professional Degree

  • PhD in Food Science and Technology. Universidad de Santiago de Chile.
  • Chemistry Engineer, Universidad de Santiago de Chile.
  • Bachelor’s degree in Engineering Sciences,  Universidad de Santiago de Chile.

Research Areas

  • Food Packaging.
  • Active Food Packaging.
  • Modeling and Simulation Process.

National and International Committees and Honors

  • Beca CONICYT para estudios de doctorado, otorgada por CONICYT. (2008-2009).
  • Beca CONICYT Apoyo a la Realización de Tesis Doctoral, otorgada por CONICYT. 2009.

Conferences (2006 to date)

  • M.J. Galotto, A. Torres, A. Guarda, N. Moraga and J. Romero, Experimental and Theoretical study on Specific Migration in Plastic Films: Effect of the thickness and the antioxidant concentration, 17th IAPRI World conference on Packaging 2010, Tianjin, China, 12-16 de Octubre 2010.
  • Torres, M.J. Galotto, A. Guarda, N. Moraga and J. Romero, Experimental and theoretical study on specific migration in plastic films: effect of the food simulant and the temperature, International Conference on Food Innovation FoodINNOVA 2010, Valencia, España, 25-29 de Octubre 2010.
  • J. Romero, M.P. Junqueira, E. Morales, N. Aravena and A. Torres, Concentration of red beet (Beta vulgaris L.) extract by means of osmotic distillation for use as natural food coloring, International Conference on Food Innovation FoodINNOVA 2010, Valencia, España, 25-29 de Octubre 2010.
  • Torres A., Galotto M.J., Guarda A., Moraga N., Romero J. Estudio fenomenológico de la migración específica de Irganox 1076 desde envases poliméricos hacia alimentos simulantes. XVII Congreso en Tecnología de Alimentos, SOCHITAL 2009, Iquique(Chile), 4-6 Noviembre 2009.
  • Galotto M.J., Ulloa P., Torres A., Guarda A., Effect of High Pressure Processing on the barrier and mechanical properties of multilayer polymeric food packaging. International Congress of Membrane and Membrane Process (ICOM 2008). Honolulu (Hawaii), 12-18 de Julio 2008.
  • Torres A., Aedo C., Franchini E., Romero J., Análisis de la transferencia de masa en un sistema de destilación con membranas utilizando gas de arrastre bajo vacío. V CITEM – Congreso Iberoamericano en Ciencia y Tecnología de Membranas, Valencia (España), 6-8 de Julio 2005.

Publications

2018
  1. C. López de Dicastillo, C. Villegas, L. Garrido, K. Roa, A. Torres, M.J. Galotto, A. Rojas, J. Romero
    Modifying an Active Compound’s Release Kinetic Using a Supercritical Impregnation Process to Incorporate an Active Agent into PLA Electrospun Mats
    Polymers 2018, 10, 479
  2. A. Rojas, A. Torres, A. Añazco, C. Villegas, M.J. Galotto, A. Guarda, J. Romero
    Effect of pressure and time on scCO2-assisted incorporation of thymol into LDPE-based nanocomposites for active food packaging
    Journal of CO2 Utilization 26 (2018) 434-444

2017
  1. C. Villegas, A. Torres, M. Ríos, A. Rojas, J. Romero, C. López de Dicastillo, X. Valenzuela, M.J. Galotto, A. Guarda
    Supercritical impregnation of cinnamaldehyde into polylactic acid as a route to develop antibacterial food packaging materials
    Food Research International (2017) 99, 650-659
  2. A. Rojas, A. Torres, F. Martínez, L. Salazar, C. Villegas, M.J. Galotto, A. Guarda, J. Romero
    Assessment of kinetic release of thymol from LDPE nanocomposites obtained by supercritical impregnation: Effect of depressurization rate and nanoclay content
    European Polymer Journal 93 (2017) 294-306
  3. N. Alvarado, J. Romero, A. Torres, C. López de Dicastillo, A. Rojas, M.J. Galotto, A. Guarda
    Supercritical impregnation of thymol in poly(lactic acid) filled with electrospun poly(vinyl alcohol)-cellulose nanocrystals nanofibers: Development an active food packaging material
    Journal of Food Engineering 217, 1-10
  4. C. López de Dicastillo, J. Bruna, A. Torres, N. Alvarado, A. Guarda, M.J. Galotto
    A traditional aboriginal condiment as an antioxidant agent in the development of biodegradable active packaging
    J. Appl. Polym. Sci. 2017, 44692 | Published 15 April
  5. A. Torres, E. Ilabaca, A. Rojas, F. Rodríguez, M.J. Galotto, A. Guarda, C. Villegas, J. Romero
    Effect of processing conditions on the physical, chemical and transport properties of polylactic acid films containing thymol incorporated by supercritical impregnation
    European Polymer Journal 89 (2017) 195–210 | Published April

2015
  1. A. Rojas, D. Cerro,A. Torres, M.J. Galotto, A. Guarda, J. Romero
    Supercritical impregnation and kinetic release of 2-nonanone in LLDPE films used for active food packaging
    J. of Supercritical Fluids 104 (2015) 76–84; Published Sep 2015
  2. A. Torres, C. Ramírez, J. Romero, G. Guerrero, X. Valenzuela, A. Guarda, M.J. Galotto
    Experimental and theoretical study of bisphenol A migration from polycarbonate into regulated EU food simulant
    Eur Food Res Technol 240:335–343; Published Feb 2015

2014
  1. A. Torres, C. López de Dicastillo, M. Ríos, I. Bastias, A. Guarda, M.J. Galotto
    Effect of organoclay incorporation on thermal, physical and morphological properties of LLDPE nanocomposites for active food packaging applications
    J. Chil. Chem. Soc. [online]. 2014, vol.59, n.4, pp.2681-2685; Published Dec 2014
  2. F. J. Rodríguez, A. Torres, A. Peñaloza, H. Sepúlveda, M. J. Galotto, A. Guarda and J. Bruna
    Development of an antimicrobial material based on a nanocomposite cellulose acetate film for active food packaging
    Food Additives & Contaminants 31 (3), 342-353
  3. A. Torres, J. Romero, A. Macan, A. Guarda, M. J. Galotto
    Near critical and supercritical impregnation and kinetic release of thymol in LLDPE films used for food packaging
    J. of Supercritical Fluids 85, 41-48

2011
  1. M.J. Galotto, A. Torres, A. Guarda, N. Moraga, J. Romero
    Experimental and theorical study of LDPE: Evaluation of different food simulants and temperatures
    Food Research International, 44, 3072-3078

2012
  1. A. Torres, A. Guarda, N. Moraga, J. Romero, M.J. Galotto
    Experimental and theorical study of thermodynamics and transport properties of multilayer polymeric food packaging
    European Food Research and Technology, 234, 713-722

2011
  1. M.J. Galotto, A. Torres, A. Guarda, N. Moraga, J. Romero
    Experimental and theorical study of LDPE versus different concentrations of Irganox 1076 and different thickness
    Food Research International 44 566-574
  2. N. Moraga, A. Torres, A. Guarda, M.J. Galotto
    Non-Newtonian canned liquid food unsteady fluid mechanics and heat transfer prediction for pasteurization and sterilization
    Journal of Food Process Engineering 34, 2000-2025

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