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VOL. 6, ISSUE 5 (2021)
Effect of dual modification on chemical composition, structural and pasting properties of black rice flour
Authors
B Thanuja, R Parimalavalli
Abstract
Rice (Oryza sativa L.) is one of the most common cereal crop consumed as a staple food by more than 50 percentage of the world’s population. The composition of rice varies depending upon the variety. The polished white rice is the highly refined version of raw rice. Colored rice varieties have been emerged recently as a potential functional food source because of the nutritional composition and phytochemical compounds. The present study dealt with Native White Rice Flour (NWRF), Native Black Rice Flour (NBRF), Dual Modified White Rice Flour (DMWRF) and Dual Modified Black Rice Flour (DMBRF) with the objective to evaluate effect of dual modification on chemical composition, structural and pasting properties of black rice flour. The dual modifications applied were enzymatic modification and Heat Moisture Treatment. The result shows that the effect of dual modification significantly reduced the nutrient composition of the native samples of both white and black rice flour (P < 0. 05). All the samples had an A-type X-ray diffraction pattern (XRD). In both the native samples crystallinity percentage decreased after dual modification. Fourier Transform Infrared Spectroscopy (FTIR) patterns showed that similar functional groups were identified in both native and dual modified samples. From the findings of Scanning Electron Microscopy (SEM) analysis, it was observed NWRF granules were polyhedral in form and clustered, while the DMWRF granules were slightly degraded. NBRF had polyhedral shape and was densely packed with sharp angles, whereas DMBRF had slightly degraded granules with soft edges. The results of pasting parameters showed, due to effect of dual modification the final viscosity and setback decreased in both the native samples (NWRF and NBRF). It was evident in this study, the dual modification applied caused significant changes in the chemical composition, structural and pasting properties of sample variety.
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Pages:759-765
How to cite this article:
B Thanuja, R Parimalavalli "Effect of dual modification on chemical composition, structural and pasting properties of black rice flour ". International Journal of Botany Studies, Vol 6, Issue 5, 2021, Pages 759-765
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