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        Structure and physicochemical properties of a new variety of purple rice (Oryza sativa L. indica) starch

        Xiaoqi Tao,Qiqi Su,Hai Wu,Lei Zhan,Wei Huang,Jingshao Zheng,Qingling Zhong,Pei Chen 한국식품과학회 2023 Food Science and Biotechnology Vol.32 No.6

        The investigation of the structure and physicochemical properties of starch extracted from a new variety of purple rice was the aim of this study. Starch extracted from a new variety of purple rice named Tianzi No. 1 (PRS) is different in structure and physicochemical properties compared with waxy rice starch (WRS), japonica rice starch (JRS), and indica rice starch (IRS). PRS granules were diversified in shape, and the birefringence of starch particles were clearly observed. Fourier-transform infrared (FT-IR) spectroscopy exhibited the degree of double helix and low short-range order structure of PRS differed from IRS, JRS and WRS. X-ray diffraction analysis shows that PRS presented a typical A-type XRD pattern and possessed lower crystallinity. Based on rheological experiment results, PRS had the highest apparent viscosity, storage modulus (G′) and loss modulus (G″). According to textural experiments, PRS gels had higher textural paraments before and after retrogradation.

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