日本传统发酵食品味噌与中国豆豉的比较

通过比较我国豆豉与日本传统发酵食品味噌的发展现状、生产工艺、食用价值、营养价值和生理功能,同时借鉴其研究和发展经验,分析了我国豆豉今后发展的方向。     

瓶级聚酯切片生产中色值的控制

论述了瓶级聚酯切片生产过程中瓶级切片与基础切片、基础切片烘与不烘、基础切片与酯化物及缩聚物之间的 b值关系 ,并对瓶级切片生产中的明度关系进行了研究 ,并据此提出了如何控制瓶级切片色值的简要方法     

ZK60镁合金磷酸盐及锡酸盐化学转化膜

为了提高ZK60镁合金的耐腐蚀性能,利用磷酸盐溶液或锡酸盐溶液,考察了在ZK60镁合金上形成磷酸盐或锡酸盐化学转换膜的工艺条件及膜层的耐蚀性能。通过改变处理时间和温度,可以得到性能不同的转换膜。通过电化学阻抗谱技术和极化曲线技术研究转化膜的耐腐蚀性能,利用扫描电镜研究其微观结构。结果表明:在磷酸盐溶液中,当处理温度为50℃时,磷化30min后试样的电荷转移电阻(Rct)为224.03Ω·cm2;当温度为80℃,反应时间为45min时,所得转换膜的Rct为377.67Ω·cm2,阻值最大,耐腐蚀性能最好;对于锡酸盐化学转化膜,90℃下,处理60min的膜层耐蚀性能最好,其Rct为388.32Ω·cm2,与磷酸盐化学转化膜相比,两种膜的保护性能相差不大。     

Corrosion properties ofAZ31 magnesium alloy and protective effects of chemical conversion layers and anodized-coatings

The corrosion properties of AZ31 magnesium alloys were studied by potentiodynamic polarization curves and electrochemical impedance spectroscopy（E1S） techniques, meanwhile, the protective properties of two environmentally protective types of chemical conversion layers and anodized coatings of AZ31 magnesium alloys were also discussed. The component of chemical conversion bath is NaH2PO4·12H2O 20 g/L, H3PO4 7.4 mL/L, NaNO2 3 g/L, Zn（NO3）2·6H2O 5 g/L and NaF 1 g/L, and components of the anodization bath is Na2SiO3 60 g/L, C6H5Na3O7·2H2O 50 g/L, KOH 100 g/L and Na2B4O7·2H2O 20 g/L. The results show that the corrosion resistance of AZ31 magnesium increases with the increase of pH value of the corrosive medium. For the chemical conversion layer acquired at 80 ℃, 10 min is the best processing time and the charge transfer resistance of the chemical conversion layer is enhanced nearly by 10 times. The optimum processing time for the anodization of AZ31 is 60 min, the charge transfer resistance value of the anodized sample at the early immersion stage is nearly 26 times of that of the blank sample and the corrosion type of the anodized samples is pitting.     

混凝土搅拌输送车电子恒速液压传动系统的设计

混凝土搅拌输送车的拌筒驱动装置在完成进料、搅拌和卸料等不同的作业中 ,可靠性高、操作简便、效率高、有利于环境保护和使用寿命长等。在传统的静液压传动中 ,我们加装电子恒速传动 ,通过控制电流进行控制 ,使拌筒保持恒速 ,保障混凝土的质量。1　拌筒驱动的标准计算用车辆发动机 (取力器 )或独立的发动机驱动变量泵 ,拌筒进料、搅拌和出料时 ,车辆发动机往往仅以较低的转速 (ｎｍａｘ=160 0ｒ/ｍｉｎ)运转 ,而采用独立发动机 ,转速可达 2 50 0ｒ/ｍｉｎ左右。下面以6ｍ3搅拌输送车为例 ,对泵、马达作相应计算。1 1　最高转速的确定根据经…