NMR Study of Mangífera Índica Starch Applied as Food Human | Biomedgrid

Mango seed starch was investigated by 1D and 2D solid state nuclear magnetic resonances (NMR). The basic work focuses the understanding changes in the molecular dynamics of this seed starch, after modification effects on its granule by the addition of acetic acid (AA), ammonium hydroxide (NH4OH) and a mixture of ammonium hydroxide and acetic acid (NH4OH/AA), using the NMR techniques. From the 2D Exchange NMR spectra, recorded at temperature below Tg, in which the molecular motion is restrict for the glucose chains, after the treatments with the three kinds of diluents, the samples showed an amplitude of molecular motion, even below Tg, which was not observed for the sample in nature, due to the changes in the molecular mobility in the starch granule after the treatments, showing that the modified starches present new molecular mobility, because new interactions and chains ordination has occurred after these processes, these changes were also confirmed by VCT and PUREX results.