Harrison is professor at Federal University of Paraná (UFPR), Brazil. He is chemistry engineer and he is a specialist in polymer materials. Currently, he is vice coordinator at Engineering Manufacturing Post graduation (PPGEM-UFPR) and he coordinates the Polymer Materials Lab, where researches about composites and circular economy are developed. He lectures at Department of Mechanical Engineering subjects about rheology, polymer processing and polymer composites. He is International Society for Development and Sustainabilbity´s membership due his recent researches on circular economy.

Bruno H. Vilsinski earned a bachelor's and Ph.D. in Chemistry from the State University of Maringá (UEM-PR). He acts as an adjunct professor at the Federal University of Juiz de Fora (Minas Gerais, Brazil). At the doctoral level, he remained a period at the University of Coimbra – Portugal. During this period, Vilsinski focused on the development, and characterization of biopolymeric materials for the obtention of hydrogels, polyelectrolyte complexes, films, and hybrid materials for drug delivery systems, and removal of pollutants.  Additionally, Professor Vilsinski has experience in the areas of Inorganic chemistry, and Materials Chemistry, focusing on the development of formulations aiming the solubilization of hydrophobic drugs (mainly phthalocyanines and porphyrins) in biological, and synthetic polymers for use in Chemotherapy and Photodynamic Therapy of cancer and other diseases.