期刊
CARBOHYDRATE POLYMERS
卷 97, 期 2, 页码 512-517出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.04.089
关键词
Partially gelatinized starch; Retrogradation kinetic; Crystallinity; Avrami model
资金
- High Technology Research and Development Program of China [2011AA100802]
- National Natural Science Foundation of China [31000813]
- Science and Technology Support Project of China [2013BAD10B03]
- Chinese Universities Scientific Fund [2012QJ009]
- Commonweal Guild Agricultural Scientific Research Program of China [201003077]
- Beijing Municipal Science and Technology Commission [Z121100001312010, D12110003112002]
The objective of this work was to investigate the effect of partial gelatinization of starch on its retrogradation using differential scanning calorimetry (DSC) and X-ray diffraction (XRD) techniques. The Avrami equation was used to predict the evolution of starch retrogradation kinetics. The degree of retrogradation in starch samples partially gelatinized 64 degrees C (S64), 68 degrees C (S68) and 70 degrees C (S70) and control (S25) increased with storage time. The retrogradation enthalpies of S68 and S70 were almost four times as high as that of S64. The S25 and S64 had dominant A-type crystalline pattern while S68 and S70 showed dominant B-type crystalline pattern. The growth of remainder crystals was faster in S25 and S64, while both the nucleation and growth rates of new crystals were faster in S68 and S70. The Avrami model was found to represent the retrogradation kinetics data of these partially gelatinized starch samples quite satisfactorily (R-2 > 0.95). (C) 2013 Elsevier Ltd. All rights reserved.
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