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壳聚糖作为表面施胶剂在胶版印刷纸中的应用 总被引:3,自引:0,他引:3
胶版印刷是比较常见的印刷方式。由于所使用的油墨类型以及印刷过程中纸张不断地湿润,因此胶版印刷纸需具有较高的表面强度和内部强度以及较高的表面能和均匀的微孔结构。 相似文献
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Ryan?J.?Kowalski Alexander?Meldrum Siyuan?Wang Helen?Joyner Girish?M.?Ganjyal 《Food and Bioprocess Technology》2017,10(7):1281-1296
A large variety of foods including soups, sauces, and other items that may experience freezing use specialty ingredients to prevent negative effects of freezing. While multiple modified starches derived from maize are available to do this, unmodified flours that may be able to carry a “natural” label are not used widely. To begin to analyze whether other alternative solutions are possible in unutilized flours, waxy wheat flour was subjected to freeze-thaw characterization through rheology to provide insight to textural changes that may occur. In order to determine freeze-thaw-induced changes, gelatinized solutions of waxy and regular wheat flours were subjected to shear rate sweeps, oscillatory rheological tests, and large amplitude oscillatory shear testing before and after freeze-thaw cycles. Minimal changes in rheological behaviors were observed in waxy wheat samples compared to regular wheat samples. Waxy wheat flour was also analyzed through differential scanning calorimetry both before and after being subjected to ten freeze-thaw cycles. Syneresis effects were also determined after each freeze-thaw cycle. Waxy wheat exhibited <5% water loss while regular wheat showed 25–40% water loss. Differential scanning calorimetry after freeze-thaw cycles were found to exhibit negligible retrogradation enthalpy values in waxy wheat samples as compared to 1.3–1.8 J/g in regular wheat samples. Results suggested that waxy wheat can serve as a novel and natural food ingredient for freeze-thaw stabilization in foods such as soups, dressings, and frozen meals. 相似文献
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1小麦基础白度和面筋质数量及质量的化验方法 1)目的 通过化验原粮小麦的基础白度和面筋质数量及质量,结合原粮的其它化验指标来确定其综合质量,间接控制成品的白度和面筋质,以此来确定原粮的搭配比例,稳定产品质量,便于指导生产. 相似文献
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研究了水力空化对麦草脱木素的促进作用。对麦草进行碱(KOH)处理48 h后再在水力空化装置中处理10~15 min,成纸抗张指数提高约50%~55%。通过控制工艺参数及空化参数,可有效控制成纸机械性能。就电耗和生产过程所需时间而言,水力空化已被证实是一种比其他蒸煮脱木素技术更有效的方法。 相似文献
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研究了糯小麦粉添加比例对混合粉理化性质(如Zeleny沉淀值、蛋白质含量、面筋含量、直链淀粉含量、总淀粉含量、稳定时间等)的影响.糯小麦粉以0、10%、20%、30%、40%、50%、60%、70%、80%、90%和100%的比例添加到扬麦17(1)粉中,并且以0、20%、40%、60%和80%的比例添加到扬麦158(1)、扬麦158(2)和扬麦17(2)中.结果表明2种小麦粉混配后降低了损伤淀粉含量,其中在糯小麦粉比例为80%时出现最小值;吸水率随糯小麦粉比例的增加不断升高,而形成时间、稳定时间、公差指数、粉质质量指数等都不呈现规律性变化;混合小麦粉的糊化过程呈现典型的"双峰"曲线,表明2种小麦粉混配后在糊化时仍是独立进行的,并未随着均匀的混配过程而完全融为一体,即使将混合小麦粉放置6个月后进行再次测定,其糊化性质与仅放置2周的测定结果没有显著变化,表明糯小麦的这种糊化特性的原因可能是2种小麦粉的淀粉本身存在一定的结构差异所致. 相似文献
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以二聚氰胺、乙二醛为原料,制备了用于涂布的三聚氰胺乙二醛(MG)抗水剂;采用X射线衍射分析对产物结构进行了表征,研究了MG对涂布纸性能的影响;初步分析了MG对涂料的流变行为的影响;通过扫描电镜(SEM)观察了纸张表面及断面的微观结构.结果表明,随着MG用量的增加,纸张的抗张强度增大,耐破度先增人然后略有下降,纸张的湿强度大幅增加,而白度随MG与淀粉质量比的增大而减小.当MG用量与淀粉用量的质量比为0.2~1.0时,涂料的触变性随着MG的添加先增大后减小.SEM结果显示,经MG处理的纸样,纤维结合的更加紧密. 相似文献
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Peanut hull flour (PHF) at 0, 4, and 8% was added to wheat bread (WB) to increase the dietary fiber content. The bread was tested for textural properties, proximate composition, dietary fiber content, specific volume, color, and some sensory attributes. While addition of PHF caused some changes in the bread, all samples were evaluated by a panel as being acceptable. From the standpoint of bread quality, PHF is an acceptable material which can be added to WB to increase the level of dietary fiber. 相似文献
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就阴离子聚丙烯酰胺的合成进行了研究,改变反应条件获得了不同分子量的聚丙烯酰胺。并讨论了阴离子单体含量及分子量对纸张强度的影响。 相似文献
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小麦粉的品质及其营养强化 总被引:1,自引:0,他引:1
小麦粉经过加工、贮存等过程造成部分营养成分的损失,根据人体营养需要,向小麦粉中添加其含量不足或缺乏的营养成分,以提高小麦粉的营养价值,这对公众营养健康具有十分重要的意义. 相似文献
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中国主食面制食品及其对小麦品质的要求 总被引:1,自引:0,他引:1
以面粉为原料的中国主食品种类繁多,其中主要是蒸煮食品,如馒头、包子、面条、水饺,占面制食品总量的80%以上。此外,还有煎炸类和面点等传统面制食品,如油条、油饼,煎饼和月饼等其它中式面点占10%以上,而世界上许多国家作为主食的焙烤食品,如面包、饼干、蛋糕等,在我国则处于次要地位,总量<10%,其中面包只占3%左右。因此,加强对我国主食蒸煮面制食品的制作工艺、食用品质要求以及与之相适应的小麦品质、加工工艺及面粉添加剂的研究,是一项非常重要的工作。 1 中国主食面制蒸煮食品的特点就蒸煮食品而言,主要是馒头、包子、面条和水 相似文献
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<正>小麦制粉厂的新建是一个系统工程。从项目的可行性分析,到选址、选择设计院进行工艺、土建、给排水及电气等设计,是一个很复杂的系统工程。土建完成后,现场工艺设备安装调试也是一个至关重要 相似文献
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The effect of moisture content (MC) on texture and properties of extrudates with varied ratios of soybean flour (SF) and wheat flour (WF) was studied. A single-screw extruder was used at screw speed 200 rpm. MCs of blends were 16, 17 or 18%, w.b. The properties of extrudates depended on flow rate of the material during extrusion. The flow rate revealed a nonlinear dependence on the blend composition and the MC at the same volume of filling of the screw feeding section. The expansion ratio of WF or SF extrudates increased with lowering of the MC. Unexpectedly, the expansion ratio decreased with lower MC for the composite extrudates. Optimal extrudate properties at 16% (w.b.) MC corresponded to 80, 90 or 100% (d.b.) WF and 20, 10% or no SF, respectively. At 17 and 18% MC, optimal properties were found for products containing 80 or 90% WF and 20 or 10% SF, respectively. 相似文献
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通过对小麦磨粉品质与制粉适应性的探讨,揭示了影响小麦生产、小麦加工品质性状、制粉工艺,小麦出粉率、面粉的颜色和灰分、电耗诸多因素之间的相关性。 相似文献
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把不同品种、不同数量的强筋剂分别添加到筋力不同的面粉中,按照GB5506—85中的方法测定空白样及添加样的湿面筋含量,发现添加样的面筋含量都有不同程度的增加,其增加值一般在0.4%~1.0%之间,平均增加0.7%。用布拉班德粉质仪和拉伸仪对各种强筋剂的改良效果进行研究,证明强筋剂的强筋作用与原面粉的筋力大小、出粉部位及面团的延伸性和抗延伸性阻力密切相关。 相似文献