1. Department of Food Science, University of Bologna, Piazza Goidanich, 60, 47023 Cesena, Italy, Magnetic Resonance Center (CERM), University of Florence, Via L. Sacconi, 6, 50019 Sesto Fiorentino, Italy, Department of Agricultural Biotechnology, Via F. Maragliano, 75-77, 50144 Florence, Italy, and International School for Advanced Studies (SISSA), INFM-Democritos and Italian Institute of Technology, Via Beirut 2-4, 34014 Trieste, Italy