共查询到17条相似文献,搜索用时 390 毫秒
1.
2.
3.
4.
5.
为了获得直接挤压制备米粉(线)的最适工艺参数,采用响应面(RSM)方法设计试验方案,对挤压机挤压制作米粉的工艺参数进行优化分析。研究原料含水量、机筒温度、螺杆转速对米粉糊化度的影响。结果表明:3个因素对糊化度影响大小依次为机筒Ⅲ区温度>螺杆转速>原料含水量。通过响应面分析得出挤压米粉最佳工艺:原料含水量35.1%,Ⅲ区温度102℃,螺杆转速117 r/min。在此条件下,米粉糊化度为92.1。与3种市售产品对比,自制米粉在硬度、糊化度、咀嚼性和感官品质方面达到了市售产品平均水平。 相似文献
6.
7.
为了探索全脂米糠粉挤压规律,以纤维素酶为催化剂,利用双螺杆挤压机做生化反应器对全脂米糠粉进行了挤压试验研究,获得了具有不同膳食纤维含量的挤出物。在单因素研究的基础上,采用了五元二次正交旋转组合设计(1/2)实施研究了机筒温度、螺杆转速、物料水分、加酶量和模孔直径对挤出物膳食纤维含量的影响规律。结果表明:5个因素对膳食纤维得率的影响大小依次为水分(X2)机筒温度(X4)pH值(X1)酶添加量(X3)螺杆转速(X5)。在pH值6.5、水分39%、加酶量3.5%、转速110r/min和机筒温度125℃条件下,所得全脂米糠粉中膳食纤维产率为33.51%。可溶性膳食纤维含量为9.9%。 相似文献
8.
9.
以大米、荞麦和黑豆为原料,在单因素试验的基础上考察机筒温度、螺杆转速和水分含量3个挤压操作参数对黄酮保持率和糊化度的影响。借助Design-Expert对黄酮保持率和糊化度2个指标进行多目标优化,最终确定该配方的最优工艺参数:机筒温度160.59℃,螺杆转速169.07r/min,水分含量23.90%。在该工艺条件下测得杂粮米挤出物的平均黄酮保持率和糊化度分别为82.45%和80.57%,与响应面预测值仅差0.56%和0.46%。上述结果表明该模型拟合度好,优化结果可靠。此工艺所得杂粮米制品的黄酮保持率高且糊化效果好,具有一定应用价值。 相似文献
10.
11.
以粳米淀粉为原料,使用改良挤压技术制备低蛋白质构米,利用响应面分析法考察加工参数如物料含水率、螺杆转速和机筒温度的变化对低蛋白米质构特性的影响,并且以粳米的质构指标为参考指标,优化低蛋白质构米的制备工艺。结果表明,最优工艺参数为物料含水率35%,螺杆转速30r/min,机筒温度(糊化区温度)120℃,该工艺条件下,低蛋白质构米的硬度为(9 122±244)g,黏性为(-983±49)g.s,弹性为0.67±0.05,接近粳米的质构特性(硬度为(8 996±196)g,黏性为(-627±41)g.s,弹性为0.62±0.03)。同时,与粳米相比,其蛋白质含量非常低,为0.43%±0.01%,而且外观和色泽接近市售粳米,米粒完整,颜色均一,圆润光滑,轮廓分明,米质结构紧密。 相似文献
12.
响应曲面法对双螺杆挤压蒸煮玉米粉条件的优化 总被引:2,自引:0,他引:2
以普通玉米粉为原料,通过双螺杆挤出对玉米粉进行改性,探讨高水分条件下物料含水量、挤出温度、螺杆转速对挤出物糊化度的影响,并建立物料含水量(X1)、挤出温度(X2)、螺杆转速(X3)之间的数学模型,即Y=96.97-1.49X1-1.21X2-1.85X3-0.37X1X2-1.15X1X3-2.35X2X3-2.20X12-2.50X22-3.77X32,确定了最佳蒸煮条件为含水量34%、挤出温度139℃、螺杆转速223r/min。在此条件下,玉米粉的糊化度为97.5%,与理论预测值基本相符。 相似文献
13.
The effects of extrusion cooking on the stability of zearalenone (ZEN) in spiked (4.4 microg/g) food-grade corn grits were investigated using a twin screw extruder. A ground rice culture material containing a high level of ZEN was used to spike the corn grits. The extrusion variables were screw type (mixing and nonmixing), temperature (120, 140, and 160 degrees C), and moisture content (18, 22, and 26%). Both unextruded and extruded samples were analyzed for ZEN by high-performance liquid chromatography. Extrusion cooking of the corn grits resulted in significant reductions of ZEN in grits extruded with either mixing screws or nonmixing screws, but use of mixing screws was somewhat more effective (66 to 83%) overall than nonmixing screws (65 to 77%). Greater reduction of ZEN was observed at either 120 or 140 degrees C than at 160 degrees C. The moisture content of corn grits was not a significant factor affecting reduction of ZEN during extrusion with either mixing or nonmixing screws. 相似文献
14.
15.
Gluten‐Free Precooked Rice‐Yellow Pea Pasta: Effect of Extrusion‐Cooking Conditions on Phenolic Acids Composition,Selected Properties and Microstructure 下载免费PDF全文
Abdallah Bouasla Agnieszka Wójtowicz Mohammed Nasereddine Zidoune Marta Olech Renata Nowak Marcin Mitrus Anna Oniszczuk 《Journal of food science》2016,81(5):C1070-C1079
Rice/yellow pea flour blend (2/1 ratio) was used to produce gluten‐free precooked pasta using a single‐screw modified extrusion‐cooker TS‐45. The effect of moisture content (28%, 30%, and 32%) and screw speed (60, 80, and 100 rpm) on some quality parameters was assessed. The phenolic acids profile and selected pasta properties were tested, like pasting properties, water absorption capacity, cooking loss, texture characteristics, microstructure, and sensory overall acceptability. Results indicated that dough moisture content influenced all tested quality parameters of precooked pasta except firmness. Screw speed showed an effect only on some quality parameters. The extrusion‐cooking process at 30% of dough moisture with 80 rpm is appropriate to obtain rice‐yellow pea precooked pasta with high content of phenolics and adequate quality. These pasta products exhibited firm texture, low stickiness, and regular and compact interne structure confirmed by high score in sensory overall acceptability. 相似文献
16.
Extrusion cooking of fish and rice‐flour blends in a single‐screw cooking extruder was studied under a wide range of variables of barrel temperature, screw speed, fish content and feed‐moisture content which ranged from 100 to 200C, 70–110 rev/min, 5–45% and 20–60%, respectively. Experiments based on rotatable design showed that the physical properties of expansion ratio, bulk density, hardness and water solubility index (WSI) were significantly affected by all the process variables except screw speed. Barrel temperatures greater than 180C and feed moistures less than 58% result in a steep increase in expansion ratio and a decrease in bulk density. At a fish content of 5% and feed‐moisture content of less than 52.5%, the hardness values decreased. When the WSI is at 40–42% of fish content and the feed‐moisture content is less than 55%, a steep increase was noticed, but a maximum WSI value of 11.5% was observed at a fish content of 41.37% and a feed‐moisture content of 35%. 相似文献
17.
以不同比例莲子淀粉与碎米粉进行混合后挤压制备重组米,通过对混合粉的糊化特性和重组米的感官品质、质构特性及蒸煮损失率的分析,确定了莲子淀粉重组米的配比。以物料含水量、模头温度、螺杆转速为影响因素,采用响应面试验优化了莲子淀粉重组米挤压的最佳工艺条件。结果表明:随着莲子淀粉添加量的增加,混合粉的峰值黏度、谷值黏度、崩解值、最终黏度及回生值等均逐渐增加;感官评分先增大后减小,在莲子淀粉添加量为30%时较高;质构特性中硬度逐渐增大,弹性、咀嚼性、黏聚性先增大后减小,在莲子淀粉添加量为30%时最大;蒸煮损失率逐渐增大。综合分析,重组米品质在莲子淀粉添加量为30%时达到最佳。重组米的最佳挤压条件为:物料含水量40%、螺杆转速210 r/min、模头温度95 ℃时,重组米评分为69.13分。 相似文献