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Resistant starch and thermal, morphological and textural properties of heat-moisture treated rice starches with high-, medium- and low-amylose content

机译:高直链淀粉,中直链淀粉和低直链淀粉含量的热湿处理稻米淀粉的抗性淀粉和热,形态和质地特性

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摘要

This study investigated the effects of heat-moisture treatment (HMT) on the resistant starch content and thermal, morphological, and textural properties of rice starches with high-, medium- and low-amylose content. The starches were adjusted to 15, 20and 25% moisture levels and heated at 110°C for 1 h. The HMT increased the resistant starch content in all of the rice starches. HMT increased the onset temperature and the gelatinisation temperature range (Tfinish -Tonset) and decreased the enthalpy of gelatinisation of rice starches with different amylose contents. This reduction increased with the increase in the moisture content of HMT. The morphology of rice starch granules was altered with the HMT; the granules presented more agglomerated surface. The HMT affected the textural parameters of rice starches; the high- and low-amylose rice starches subjected to 15 and 20% HMT possessed higher gel hardness.
机译:这项研究调查了热湿处理(HMT)对高,中,低直链淀粉含量的大米淀粉的抗性淀粉含量以及热,形态和质地特性的影响。调节淀粉的水分含量为15、20和25%,并在110°C加热1小时。 HMT增加了所有大米淀粉中抗性淀粉的含量。 HMT增加了起始温度和糊化温度范围(Tfinish -Tonset),并降低了具有不同直链淀粉含量的大米淀粉糊化的焓。随着HMT水分含量的增加,这种减少也增加了。 HMT改变了稻米淀粉颗粒的形态;颗粒呈现出更多的团聚表面。 HMT影响大米淀粉的质地参数; 15%和20%HMT的高和低直链米淀粉具有较高的凝胶硬度。

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