**About the Editors**

**Isidoro Garcia-Garcia**, Full Professor of Chemical Engineering, University of Cordoba, ´ Spain. He works in Biochemical Engineering, especially on bioreactors for acetic acid bacteria (AAB), and is responsible of many research projects as well as contracts with various companies. Despite the limitations on publishing, the transfer of research results to the productive sector has been a fundamental part of his career. A collaboration with international research groups and companies has allowed him to work in different countries (UK, Italy, Germany, El Salvador, Switzerland, Japan and China) and for the coordination of a research network on vinegar and AAB. His contributions to modelling and optimization of biochemical processes, particularly with AAB, could be highlighted with direct applications in some industrial vinegar plants. Additionally, he worked in the development of new fermented products and optimal use of natural resources. Additionally, he has developed an important teaching activity through courses on Chemical and Biochemical Engineering at the University of Cordoba and international universities. https://scholar.google.com/citations?user=iS1vYFwAAAAJ&hl=es.

**Jesus Simal-Gandara** is Full Professor in Nutrition and Food Science at the Faculty of Food Science and Technology, University of Vigo (Spain). He was the first recipient of the Spanish Award of Completion of Pharmacy and PhD Prize at the Faculty of Pharmacy, University of Santiago de Compostela (Spain). He was Associate Professor in 1991 at the University of Vigo, and has been full Professor since 1999. He is a corresponding member of the Royal Academy of Medicine and Surgery of Galicia (1991) and a member of the Scientific Committee of the Spanish Agency for Consumption, Food Safety and Nutrition (2013–2016). Additional honors include the Research Medal of the Royal Galician Academy of Sciences 2020 Antonio Casares Rodriguez (Chemistry and Geology), President of the International Association of Dietary Nutrition and Safety (2020), Member of the Royal Academy of Pharmacy of Galicia (2021), and Associate Editor in Food Science and Nutrition (Wiley) and Food Chemistry (Elsevier). He leads a research group of excellence, and was leading CIA3 - Environmental, Agricultural and Food Research Center (2008–2018). He was the Head of the Department of Analytical Chemistry and Food Science (2013–2018), and Vice-Chancellor for Internationalization at the University of Vigo (2018). He was nominated by Clarivate Analytics for highly cited research (2018 and 2020) and was invited for research stays at the Universite de Paris-Sud (France), University of Delaware (USA), Fraunhofer-Institut ´ fur Lebensmitteltechnologie und Verpackung (Germany), Central Science Laboratory (UK), ¨ TNO-Voeding (The Netherlands), Packaging Industries Research Association (UK) and The Swedish Institute for Food and Biotechnology (Sweden). He has 19000 citations in 500 papers= 38 per paper; h-index= 73. http://scholar.google.es/citations?user=rmeHFXIAAAAJ&hl=es&oi=ao.

**Maria Gullo** is Associate Professor in Agricultural Microbiology (AGR/16) at the University of Modena and Reggio Emilia. She is the scientific coordinator of UMMC (Unimore Microbial Culture Collection). Her research activities include the ecophysiology and industrial applications of Acetic Acid Bacteria, biopolymers synthesis and applications, the development of new biotechnological products by selective fermentations and industrial microorganisms managed within UMCC. She has experience in the coordination of national and international projects also related to transfer scientific results to small and medium enterprises. She conceived and organized the "Vinegar and Acetic Acid Bacteria-International Symposium", which was the first meeting devoted to acetic acid bacteria and the products of their metabolism. Currently, she is involved in the scientific committees of the established regular symposia held every 3 years. She has consolidated experience in training PhD, masters and undergraduate students, as well as visiting scientists. She is member of the PhD School Council STEBA (Research Doctorate in Food and Agricultural Science, Technology and Biotechnology). She is Delegate member General Assembly of the Joint Research Unit (JRU) in the frame of Microbial Resource Research Infrastructure MIRRI-IT (MIRRI-ITALIA). https://personale.unimore.it/rubrica/dettaglio/mgullo; https://www.umcc.unimore.it/.
