Determination of structural characteristics of starch extracted from seeds of Heritiera littoralis Dryand

Starch was isolated from the seeds of Heritiera littoralis and further used to study the various properties. Also, influence of structural features on thermal properties was studied. Starch characteristics were examined using polarized light microscopy (Photomicrography), Scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) pattern, and Differential scanning calorimetry (DSC). The isolated starch was found to be creamy, crystalline, non-hygroscopic powder with yield of about 31.5%. Starch granules were an oval to polygonal in shape with size ranges 1-5μm. The isolated starch showed indicative of an intact granule structure. Isolated starch had the C-type XRD pattern. The enthalpy of gelatinization (ΔHgel) and percentage of retrogradation (%R) for this starch were 11.053 J/g and 83.51% respectively, which may related to XRD pattern and small granule size. Therefore, the present attempt is made to explore this starch is an important biomaterial. Knowledge of molecular structure can suggest an application of the starch in products to improve their functional characteristics, so structural features of starch was studied.

Author(s): Priya D. Patil

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