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Comparison Study of DBD Plasma Combined with E-Beam Pre- and Post-treatment on the Structural-Property Improvement of Chinese Yam Starch

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Abstract

The study is aimed at investigating the effect of dielectric barrier discharge (DBD) plasma and E-beam technology modification sequences on the “structure property” of starch. Here, DBD plasma (treated with 1 and 5 min) and E-beam (irradiated under 5 and 10 kGy) and their pre-/post dual modifications were applied to characterize the structural and physicochemical properties of starch. Although plasma causes etching on the starch surface, E-beam poses a minor effect on microstructure. Both modifications promoted starch degradation, resulting in substantial molecular weight, long chain proportions, and viscosity reductions. Also, the short-range ordered structure and the relative crystallinity of starch were disrupted after both modifications. Nevertheless, starch FT-IR spectrum patterns, crystal types, and growth rings were retained. In addition, both treatments improved native starch solubility and suppressed swelling power. Interestingly, plasma-E-beam (P-E) treatment induced a deeper modification degree of starch at the same treatment intensity than E-beam-plasma (E-P) treatment, as evidenced by lower molecular weight and viscosity, smaller R1047/1024, and enthalpy. For resistant starch (RS) content, P-E treatment provided a more intensive improvement. Consequentlys, we suggest pre-plasma treatment in starch processing since it improves the viscosity, solubility, and digestibility of native starch with less damage to the starch structure.

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Acknowledgements

The NWAFU Instruments Platform (RVA, FT-IR, DSC, and SEM) provided valuable assistance to the author. And the authors thank Mrs. Lu Cui (College of Food & Science, Northwest A&F University) for her guidance on DSC analysis.

Funding

Financial support for this study came from the National Key R&D Program Subproject of China (2017YFD0401203-01).

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Contributions

Wei Liang: validation, writing, review, and editing. Xinyue Liu: conceptualization. Jiayu Zheng: software. Wenqing Zhao: investigation. Yue Zheng: methodology. Xiangzhen Ge: data curation. Huishan Shen: methodology. Gulnazym Ospankulova: data curation. Marat Muratkhan: validation. Kakimova Zhainagul: data curation. Wenhao Li: funding acquisition and supervision.

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Correspondence to Wenhao Li.

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Liang, W., Liu, X., Zheng, J. et al. Comparison Study of DBD Plasma Combined with E-Beam Pre- and Post-treatment on the Structural-Property Improvement of Chinese Yam Starch. Food Bioprocess Technol 16, 2287–2303 (2023). https://doi.org/10.1007/s11947-023-03024-1

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  • DOI: https://doi.org/10.1007/s11947-023-03024-1

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