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Effect of Dry Heating on Physicochemical Properties of Pregelatinized Rice Starch

机译：干加热对预胶水稻淀粉物理化学性质的影响

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摘要

Japonica and indica rice starches (10% w/w) were pregelatinized in a boiling water bath for 5 or 10 min and subsequently heat-treated in a dry state for 0, 1, 2, or 3 h at 130 degrees C to examine the effects of dry heating on pasting viscosity, paste clarity, thermal properties, X-ray diffraction pattern, and gel strength of pregelatinized starches. Heat treatment obviously changed the physicochemical properties of pregelatinized rice starch. The pregelatinized rice starches had higher peak viscosity and final viscosity than the corresponding native rice starches. Heat treatment of pregelatinized rice starch for 1 h increased the peak viscosity, but treatment for 2 or 3 h decreased the peak viscosity compared with the unheated pregelatinized rice starch. The indica rice starch exhibited more substantial changes in pasting viscosity than did japonica rice starch during heat treatment. The melting enthalpy of the endothermic peak occurred at 90-110 degrees C, and the intensity of the X-ray diffraction peak at 20 degrees was increased by dry heating, possibly owing to the enhanced amylose-lipid complexes. The dry heat treatment of pregelatinized starch caused an increase in paste clarity and a decrease in gel strength.
机译：粳稻和籼稻淀粉（10％w / w）在沸水浴中预胶质化5或10分钟，随后在130℃下以0,1,2或3小时的干燥状态进行热处理以检查干加热对粘贴粘度，糊状，热性质，X射线衍射图谱和预胶质淀粉的凝胶强度的影响。热处理明显改变了预蛋白水稻淀粉的物理化学特性。预鉴定的水稻淀粉具有较高的峰值粘度和比相应的天然米淀粉的最终粘度。预胶化水稻淀粉的热处理1小时增加峰值粘度，但是处理2或3小时的处理减少了与未加热的预胶化水稻淀粉相比的峰值粘度。籼稻淀粉在热处理期间表现出粘附粘度的更大变化，而不是粳稻淀粉。在90-110℃下发生吸热峰的熔化焓，并且通过干加热增加20度的X射线衍射峰的强度，可能由于增强的直链淀粉 - 脂质络合物而增加。预胶质化淀粉的干热处理导致糊状糊状性的增加和凝胶强度的降低。

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  • 来源
    《Cereal Chemistry》 |2017年第6期|共6页
  • 作者

    Lee Su-Jin; Yang Yu-Jin; Chung Hyun-Jung; Lim Seung-Taik;

  • 作者单位

    Suseong Coll Dept Hotel Cuisine Daegu 42078 South Korea;

    Korea Univ Coll Life Sci &

    Biotechnol Dept Biotechnol Seoul 02841 South Korea;

    Chonnam Natl Univ Div Food &

    Nutr Gwangju 61186 South Korea;

    Korea Univ Coll Life Sci &

    Biotechnol Dept Biotechnol Seoul 02841 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农业化学;
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