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挤压膨化技术在谷物加工中的应用 总被引:1,自引:0,他引:1
挤压膨化技术是一种现代的食品加工技术,在谷物类食品加工中具有广泛的应用。挤压膨化生产的食品有效的改善了口感,其营养丰富、简单快捷、便于食用、种类繁多,易于被广大消费者接受。挤压膨化技术解决了全麦粉由于含有丰富的酶类和大量的脂肪而不易保存的问题;提升了玉米和糙米的食用品质;提高了苦荞的适口性和食用品质;改善了大麦产品硬而缺乏弹性的问题,使大麦饮品利用率提高,饮料的沉淀率降低,赋予其浓郁的麦香味;改变了燕麦中膳食纤维的含量同时提高氨基酸的利用率。我们还简单介绍了挤压膨化技术在谷物加工中的工艺参数,以期对挤压膨化技术在谷物加工中更好地应用提供帮助。 相似文献
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加酸挤压膨化脱胚玉米制备乙醇研究 总被引:1,自引:0,他引:1
以脱胚玉米为原料,采用加酸挤压膨化处理,在单因素基础上,对试验数据采用中心组合试验设计;结果表明:物料体系含水量23.4%,螺杆转速234r/min,挤出物料温度143℃,盐酸与原料淀粉质量之比0.0257时,最终物料淀粉出酒率为58.35%,较传统方法提高6.71%,残糖量下降35.9%,发酵周期可缩短9h。 相似文献
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本文提出了蒸煮挤压间接膨化生产工艺的各个工序中产品质量密相关的技术参数,并就这些技术参数进行了分析和讨论。 相似文献
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挤压膨化技术在营养早餐生产上的应用 总被引:4,自引:2,他引:4
在阐述挤压膨化原理的基础上,介绍了挤压膨化qd技术在营养早餐上的应用,以及产品的质量标准,并对影响营养早餐质量的因素进行了分析。 相似文献
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使用挤压膨化原料时酒精发酵中酿酒酵母的变化规律探讨 总被引:3,自引:0,他引:3
通过试验选取挤压膨化工艺参数组合为 :挤压机模孔直径Φ =1 1mm ,套筒温度T =1 70℃ ,脱胚玉米含水量W =1 3 % ,螺杆转速 1 60r/min。在此参数下获得的物料 ,与未膨化样品对比 ,酿酒酵母在膨化物料中酵母数最高值可由 1 68× 1 0 8/mL升至 2 67× 1 0 8/mL。酵母增代时间可由 1 6 0 3h缩短至 1 3 3 6h。添加营养盐尿素和KH2 PO4 后此种效果更加明显 ,这种处理有可能使发酵时间缩短。 相似文献
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Production of Resistant Starch by Extrusion Cooking of Acid-Modified Normal-Maize Starch 总被引:1,自引:0,他引:1
ABSTRACT: The objective of this study was to utilize extrusion cooking and hydrothermal treatment to produce resistant starch (RS) as an economical alternative to a batch-cooking process. A hydrothermal treatment (110 °C, 3 d) of batch-cooked and extruded starch samples facilitated propagation of heat-stable starch crystallites and increased the RS contents from 2.1% to 7.7% up to 17.4% determined using AOAC Method 991.43 for total dietary fiber. When starch samples were batch cooked and hydrothermally treated at a moisture content below 70%, acid-modified normal-maize starch (AMMS) produced a greater RS content than did native normal-maize starch (NMS). This was attributed to the partially hydrolyzed, smaller molecules in the AMMS, which had greater mobility and freedom than the larger molecules in the NMS. The RS contents of the batch-cooked and extruded AMMS products after the hydrothermal treatment were similar. A freezing treatment of the AMMS samples at −20 °C prior to the hydrothermal treatment did not increase the RS content. The DSC thermograms and the X-ray diffractograms showed that retrograded amylose and crystalline starch–lipid complex, which had melting temperatures above 100 °C, accounted for the RS contents. 相似文献
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Maize grits were extrusion cooked in a CM45-F conical, counter-rotating twin-screw extruder, at different barrel temperatures (140–200°C), feed moistures (11.8–14.2% w.b.), feed rates (37–51 kg/h), screw speeds (65–81 rpm), and initial thiamin concentrations (9–93 mg/kg). Residence time distribution was measured by a dye tracer technique. A first-order rate equation was used to model the reaction kinetics, which allowed the calculation of the destruction rate constant using residence time distribution curves. The k-values were most dependent on barrel temperature, feed moisture, and screw speed. The destruction rate constant of thiamin during extrusion cooking was a function of product temperature and shear stress. 相似文献
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对传统的酒精蒸煮醪液真空冷却工艺作了简要介绍,详细论述了自然冷却工艺的技术,方法,措施,优越性,针对实际应用状况,对两种冷却方式的优缺点进行了对比论述。 相似文献
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为了研究加酶挤压法生产淀粉基脂肪替代品的可行性,以玉米淀粉为原料,以DE值为指标,利用双螺杆挤压机研究物料水分、机筒温度、螺杆转速、加酶量对DE值的影响;在单因素的基础上,采用响应面分析法作图分析。结果表明:按照研究操作条件,加酶挤压法可以生产淀粉基脂肪替代品(DE值为2.882~9.963)。加酶量和物料水分对DE值的影响显著,螺杆转速对DE值的影响不明显,DE值随加酶量和物料水分的增加而增大,随机筒温度的增加先增大后减小。 相似文献