Abstract:In this paper, the steady-state mathematical model for an industrial prefractionator is devloped. The advanced UNIFAC group method has been used for calculating-vapor-liquid equilibrium in situation where no experimenta linformation is available. A new me

Abstract:本文对龙虾片的蒸煮挤压工艺进行了探索性的研究,发现在挤压机筒温度T_b=90℃,挤压螺杆旋转速度V_s=78r/min,绝对干料进料速度V_F=150g/min~(-1)以及物料水分含量M_c=50%的工艺条下,可以生产出品质优良的龙虾片。本文还就龙虾片的油炸膨化机理进行了讨论。

Abstract:用硝酸根电极同时测定肉制品中硝酸盐和亚硝酸盐含量。以0.1mol/l硫酸钠作为总离子强度调节剂,在pH3.4±0.1,硝酸根电极在硝酸钠4.0—30μg/ml浓度范围内呈良好的能斯特应答。一次标准加入法定量。在酸性条件下,用过氧化氢氧化提取液中NO_2~-,测得NO_3~-总量,然后用差减法求得NO_2~-含量。用本法测定了13种市售肉制品中硝酸盐和亚硝酸盐含量。变异系数2.31%—9.83%,回收率95.0%—108.4%。用NO_3~-和镉柱还原法,NO_2~-和萘乙二胺比色法进行了对照,结果无显著性差异(α0.05)。

Abstract:This paper mainly studies the new method of separating maltose from maltose syrup with the paper chromatography or thin-layer chromatography. The content of the eluded maltose is determined by anthrone colorinetry.

Abstract:从土壤中筛选到一能分泌碱性高温淀粉酶的芽孢杆菌属菌株。用质粒pTB522作载体,该淀粉酶基因(amyA)被克隆并在枯草芽孢杆菌ANA-1中得到表达。又通过亚克隆,得到含酶基因的更小重组质粒pTBX32(14.6kb)。携带该重组质粒的枯草芽孢杆菌ANA-1分泌的淀粉酶的特性与供体菌的相同。该酶作用最佳pH为8.5、最适温度为75℃,但在65℃,pH8.5条件下处理1h,该酶活性不降低。通过硫铵沉淀、热处理、DEAE——纤维素色谱和亲和色谱等分离技术,从培养液中部分纯化了该酶,其分子量估计为56000。

Abstract:The harmfulness and its root causes of bad animal feed quality are elaborated in this paper. The fresh-keeping programs of corn, premixing animal feed, prescription particle animal feed, fish powder (as the representations of cereals) and special type ani

Abstract:This paper introduces how to separate ionic and nonionic composition of polyester short fibre oil agent, polyester long fibre oil agent, polyester tire cord oil agent polyamide tire cord oil agent, polypropylene staple flare oil agent by applying ion exch

Abstract:The basis and method of the determination of carbonyl compoundsby automatic potentiometic titration is introduced. The experimental results show that this method is simple and easy.

Abstract:In this paper, a new method, is developed to lines of complexurved faces in accordance with the topology conversion, principle, The approach is of great worth in making practical application of the topology conversion principle in engineering.

Abstract:本文拟在概率赋范线性空间(E、F、△),且具有可列基的空间上建立概率A-proper映象拓扑度及其相应的不动点定理。作为特例,我们讨论了在上述空间情形的概率紧连续场的拓扑度。