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Molecules 2018, 23(12), 3248; https://doi.org/10.3390/molecules23123248

Comparison of Physicochemical Properties of Starches from Nine Chinese Chestnut Varieties

1
Key Laboratory of Crop Genetics and Physiology of Jiangsu Province / Key Laboratory of Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
2
Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province / Joint International Research Laboratory of Agriculture & Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou 225009, China
3
Institute of Forest and Pomology, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100093, China
*
Author to whom correspondence should be addressed.
Academic Editors: Mingfu Wang and Yueliang Zhao
Received: 14 November 2018 / Revised: 1 December 2018 / Accepted: 4 December 2018 / Published: 7 December 2018
(This article belongs to the Special Issue Natural Products Used as Foods and Food Ingredients)
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Abstract

Chestnut is a popular food in many countries and is also an important starch source. In previous studies, physicochemical properties of starches have been compared among different Chinese chestnut varieties growing under different conditions. In this study, nine Chinese chestnut varieties from the same farm were investigated for starch physicochemical properties to exclude the effects of growing conditions. The dry kernels had starch contents from 42.7 to 49.3%. Starches from different varieties had similar morphologies and exhibited round, oval, ellipsoidal, and polygonal shapes with a central hilum and smooth surface. Starch had bimodal size distribution and the volume-weighted mean diameter ranged from 7.2 to 8.2 μm among nine varieties. The starches had apparent amylose contents from 23.8 to 27.3% but exhibited the same C-type crystalline structure and similar relative crystallinity, ordered degree, and lamellar structure. The gelatinization onset, peak, and conclusion temperatures ranged from 60.4 to 63.9 °C, from 64.8 to 68.3 °C, and from 70.5 to 74.5 °C, respectively, among nine starches; and the peak, hot, breakdown, final, and setback viscosities ranged from 5524 to 6505 mPa s, from 3042 to 3616 mPa s, from 2205 to 2954 mPa s, from 4378 to 4942 mPa s, and from 1326 to 1788 mPa s, respectively. The rapidly digestible starch, slowly digestible starch, and resistant starch ranged from 2.6 to 3.7%, from 5.7 to 12.7%, and from 84.4 to 90.7%, respectively, for native starch, and from 79.6 to 89.5%, from 1.3 to 3.8%, and from 7.1 to 17.4%, respectively, for gelatinized starch. View Full-Text
Keywords: Chinese chestnut; starch; structural properties; thermal properties; pasting properties; digestion properties Chinese chestnut; starch; structural properties; thermal properties; pasting properties; digestion properties
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Zhang, L.; Liu, T.; Hu, G.; Guo, K.; Wei, C. Comparison of Physicochemical Properties of Starches from Nine Chinese Chestnut Varieties. Molecules 2018, 23, 3248.

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