Abstract
This article studies the seed of sorva (Couma utilis) that is a native fruit of Amazons State, in Brazil. Sorva seed components were analyzed by 1H and 13C using solid state high resolution nuclear magnetic resonance (NMR) spectroscopy, because they are important nuclei to be used to evaluate plant seeds. High resolution 1H NMR (1H HRMAS) with magic angle sample spinning (MAS), and 13C NMR using MAS and particularly 13C NMR with cross-polarization (CP) and MAS are techniques that allow the evaluation of the seed in detail. The variable contact–time (VCT) experiment is another useful technique that can be used to measure a proton spin-lattice relaxation time in the rotating frame, which is a parameter that gives response on the intermolecular interaction and is related to the sample spatial homogeneity. From the NMR results it was found that the sorva seeds are mainly constituted of polysaccharides, glycoproteins, and triacylglycerides.
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