移动式粮食通风干燥仓的研发

为满足当前农村对小型粮食干燥机的需求,介绍了一种可移动式小型粮食通风干燥仓,并详细论述了它的组成、结构特点及工作原理。采用通风干燥仓对高水分稻谷和玉米进行降水试验,结果表明,该设备具有结构简单,移动方便,操作简便,运行费用低,降水效果好等特点,适合于农村庭院小批量高水分粮食等多种农产品的降水处理,可在中原农村地区推广应用。     

卡尔费休法在油脂水分测定中的应用

用恒温烘箱和真空烘箱方法测定油脂水分含量,测定时间较长,操作繁琐,需要一种快速检验方法来代替.通过卡尔费休法与国标方法在油脂水分测定中的比较,结果卡尔费休法测定油脂水分能取得与国标法相近的结果,且重现性好,操作方便快捷,可以推广使用.     

纸页水分在线测量和标定探讨

主要介绍微波水分传感器的基本工作原理,以及在各纸种生产中的应用,并对在线水分测量值的标定方法进行分析探讨。     

生丝回潮率检验样丝绞数的探讨

将生丝回潮率检验的样丝随机分为两组，并将分组单独测试回潮率的结果与其平均值进行比较，按置信区间计算方法判定生丝回潮率检验样丝绞数在保证检验结果准确的前提下，可在现行标准规定的基础上减少一半，从而节约大量的样丝，给生产企业带来经济效益。     

水分与温度对根霉Q303生长繁殖的影响

根霉曲是采用纯培养技术,将根霉与酵母在麸皮上分开培养后再混合配制而成的.根霉曲具有较强的糖化发酵力,适合各种淀粉质原料小曲酿酒工艺使用.水分和温度是保证根霉Q303菌种质量的关键.在拌麸皮时加45%～50%的水较适宜;制曲过程的品温最好控制在36～38℃;前期干燥温度一般为40～45℃,后期烘干温度可控制在45～50℃.     

双组分聚氨酯涂层剂防水透湿性能的研究

以(PEA、PTMG、PPG)／PEG混合多元醇作为聚醚二醇组分与MDI进行预聚，然后用1，4-丁二醇扩链合成具有防水、透湿性的聚氨酯涂层剂，研究了PEG分子质量、软段w(PEG)、w(硬段)以及软段单体结构对涂层剂防水透湿性能的影响，实验表明，涂层织物的防水透湿性能与涂层剂的w(亲水链段)和交联度有关．当PEG分子质量和软段的w(PEG)增大时，涂层织物的透湿量也随之增大，耐静水压值则减小；当w(硬段)增大时，涂层织物的透湿量则减小，耐静水压值随之增大；当软段单体从PEA到PTMG到PPG亲水性逐级增大日寸，涂层织物的透湿量也随之增大，耐静水压值则减小，     

啤酒糟含水率的软测量

啤酒糟的含水率是安全储存的重要指标，工艺上要求干燥后的啤酒糟含水率8%-10％。但啤酒糟含水率难以实现在线检测，为解决此问题，该文建立了啤酒糟旋转闪蒸干燥过程BP神经网络建模，并基于该模型建立了啤酒糟含水率的实时预测系统，实现啤酒糟含水率的软测量。该系统的预测值与离线分析平均相对误差小于2．5％，满足干燥工艺的要求，预测结果对实际干燥过程的操作具有指导作用。     

Reduction of Streptococcus thermophilus in a whey protein isolate by low moisture extrusion cooking without loss of functional properties

A whey protein isolate powder (WPI) (4–5% water) inoculated with 5x10⁵ viable Streptococcus thermophilus per g, was continuously processed in a twin screw extruder under the following conditions (barrel length = 500 or 1000 mm; screw profile = forward transport and compression elements; moisture content during extrusion = 4–5%; feed rate = 10 kg h^-1; barrel temperature ( T_b ) = 80–204°C; speed of screw rotation = 50 r.p.m.). The minimum residence time determined by pulse injection of erythrosin was 20–25 s (500 mm barrel) or 35–40 s (1000 mm barrel).
Reduction values of viable Streptococcus thermophilus of 10^4.2-fold (500 mm barrel, T_b = 143°C) or 10^4.9-fold (1000 mm barrel, T_b = 133°C) were obtained without any modification of protein solubility or gelling properties. WPI extruded at the highest barrel temperatures (182–204°C) underwent limited browning and reduction of protein solubility. Gel permeation and hydrophobic interaction chromatography of the soluble constituents did not show any aggregates of β-lactoglobulin or α-lactalbumin.
Gels prepared from control or extruded WPI ( T_b 143°C with a barrel length = 500 mm or T_b 133°C with a barrel length = 1000 mm) were identical, as judged by scanning electron microscopy and rheological evaluations.     

改善合成革吸湿透气性能的研究

目前在合成革领域亟待解决的问题就是合成革在吸湿透气方面与天然革的差距还比较明显。本文对非离子聚氨酯干法面层的吸湿透气行为进行了研究。讨论了非离子共聚组分的引入对聚氨酯合成革吸湿透气行为的影响。结果表明亲水基团PEG的引入可以提高合成革吸湿透气性能。并且微相分离大的吸湿透气性能差。     

Effect of High Moisture Maize Storage on Tortilla Quality

We evaluate the effect of high moisture content (MC) stored maize grain on tortilla quality and on the growth of toxigenic fungi. Maize with a MC of 18% was stored for 10, 15, and 20 d at 28 °C. The control seed was stored 20 d with a MC of 10.7% at 4 °C. The high MC grain and the control were processed using the traditional nixtamalization process. Storage conditions had a significant effect on tortilla quality parameters such as pH, color, tensile strength, cut force, viscosity peak, starch retrogradation (setback), and aflatoxin contamination. Tortillas produced with high MC grain presented a lower quality than those produced with low MC grain.