天然淀粉的超高压糊化压力研究
Study on gelatinization pressure of starch by ultra high pressure processing
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摘要: 在悬浮液浓度为5%(w/v),温度为(20±2)℃时,对8种不同淀粉进行高压处理5 min使淀粉发生糊化,采用X射线衍射测试技术得到了各种淀粉完全糊化的压力:小麦淀粉和木薯淀粉约为500 MPa,玉米淀粉、荸荠淀粉、糯小麦淀粉和糯米淀粉均为550 MPa,糯玉米淀粉约为650 MPa,马铃薯淀粉为750 MPa.Abstract: To study the gelatinization pressures of different kinds of starch at atmospheric temperature,eight different starches chosen as raw materials (5%(w/v),at (20±2)℃) by different pressure were treated for 5 min,then the relations between pressure and starch gelatinization were analysed by X ray diffraction.Wheat starch and tapioca starch,500 MPa;corn starch,water chestnut starch,waxy wheat starch and glutinous rice starch,550 MPa;waxy maize starch,650 MPa;potato starch,750 MPa.
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