Natural starches obtained by fruit seeds have been a subject of studies because of their applications, as a consequence of their chemical properties. As it is known, the fruits depend on the geographic region. Because of this, several factors affect the seed starches nature, such as granules size, morphology, components, and composition. Thus, to better understand starch properties, it is necessary to investigate the chemical behavior of these factors. This work focused on the chemical components and molecular dynamic behavior of the Dipterxy Alata Vogel (cumbaru) starch, because this fruit is very popular and is used in abundance for people because they think that it is good for some kinds of diseases. The main chemical components and the molecular dynamics of starch from the Dipterxy Alata Vogel were studied by applying solid-state 13 C nuclear magnetic resonance spectroscopy (NMR).

Developing a methodology of analysis for the identification of the components presented in natural resins without a previous isolation or treatment, we first chose to use liquid nuclear magnetic resonance(NMR) to assign the main components. However, solid-state NMR techniques give much more information about the chemical components presents in the resins than solution NMR, so we changed the methodology. The first approach must be the application of solid-state NMR techniques and continuation of the identification process by analysis of the data obtained.

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7Li and 13C solid-state NMR methods were used to study Li+-doped siloxane/poly(ethylene oxide) hybrid electrolyte materials, where the polymer chains are linked to the inorganic phase through covalent bonds. These methods were employed to analyze the effects of the interactions between the organic and inorganic (siloxane and lithium) phases on the polymer dynamics. The motion geometry of polymer chains was found to be very similar for Li+-doped and non-doped Ormolytes. However, a significant effect of the Li+ doping on the non-exponentiality of the correlation time functions that describe the polymer chain dynamics was observed, and a model that supports such behavior was proposed.

Mango seed starch was mainly investigated by 1D solid state nuclear magnetic resonance (NMR) to evaluate the changes in the chemical structure and molecular dynamic, as a response of time storage. X‐ray diffraction was used to accompany changes in the morphology after time storage. Thus, the basic work was to understand the changes of mango seed starch, after 8 years storage at room conditions. The solid‐state NMR and X‐ray diffraction results showed that no changes in both chemical structure and molecular dynamic as well as morphology was found after 8 years of being storage at room conditions. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012