外加

Based on the theory of shrinkage, capillary force theory, the influence of road concrete additives in common use on surface tension of water is studied, and the results show that the influence of water reducer is very small whereas shrinkage-reducing agent and air entrainer can reduce surface tension of solution significantly. The relation between surface tension and additive dosage are non-linear relation. Each additive has an obvious critical micelle concentration.

从混凝土收缩的基本理论——毛细管张力理论出发，通过道路混凝土外加剂对水的表面张力的影响研究发现，减水剂对水的表面张力的影响很小，而减缩剂和引气剂可以大幅度降低溶液的表面张力，溶液的表面张力随外加剂的掺量呈非线性形式降低，而且都存在临界胶束浓度。

Except for this, the others such as ionic bridge (e. g. Me〓, I〓), appositional replacement and destroying the binding site etc. is involved in also. 5. The type of BSA intrinsic fluorescence being quenched is mainly static quenching, and the nonradiative energy transfer is attributed to BSA intrinsic fluorescence being quenched also.

各种类型的外加剂对中药小分子-蛋白质作用过程的影响方式各不相同，与BSA结合引致BSA分子构象改变是外加剂参与并影响中药小分子-BSA相互作用过程的共通机制；除此共通机制外，还可能存在离子架桥、同位取代以及对BSA分子上药物结合部位的破坏等作用形式。

Simplier and more efficient ion extraction methods for atomic vapor laser isotope separation AVLIS were evaluated using a 2-D electron-equilibrium model to compute and compare three electrostatic methods the parallel electrode method, the Π type electrode method, and the improved M type electrode method.

为探索用于原子蒸气激光同位素分离AVLIS的简单有效的离子引出方法，用二维流体理论电子平衡模型计算比较了3种静电场方法平行板电场法，Π型电极法，改进M型电极法计算发现，二维流体理论电子平衡模型并不能很好地描述Π型电极法对另外两种静电场方法，计算了不同外加电压、不同的初始原子密度和不同的目标同位素丰度等条件下的离子引出情况从计算结果可以看出，改进M型电极法不论是从离子引出时间还是从碰撞损失率，都要比平行板电极法好得多当外加电压较高或初始原子密度较高时，这种好处就更加明显因此，改进M型电极法是一种可供实际采用的比较好的静电场方法

The results showed that:(1) 5'-nucleotide contents in yeast autolysate was slightly increased by adding RNase frommalted barley roots;(2) higher pH did not improve the 5'-nucleotide contents even in the presence of RNase from malted barleyroots, but at the pH 8.0, the addition of Acalase could increase the final yield, soluble protein contents and 5'-nucleotide inthe presence of RNase from malted barley roots.

酵母核酸酶的pH稳定性和温度稳定性均比麦芽根核酸酶的要差。这说明自溶法生产酵母提取物时，即使外加5'-磷酸二酯酶不能有效提高呈味核苷酸的原因并非由于外加的5'-磷酸二酯酶性质不稳定，而是另有其它原因。

In order to simulate working atmosphere of additives in concrete, the influence of additives on surface tension of calcium hydroxide solution is studied in this paper too.

为了更好的模拟外加剂在混凝土中的工作环境，本文同时研究了外加剂在饱和石灰水溶液的表面张力。

A 125W UV lamp (365nm) was used as light source. The photoelectrochemical system consisted of three electrodes. As follows, Ti/TiO2 thin film was used as the working electrode, graphite electrode as the counter electrode and saturated calomel electrode as the reference electrode. Methyl orange was used as the objective substance. The photoelectrocatalytic degradation of Methyl orange on the Ti/TiO2 thin film was studied .The effects of some factors such as external bias potential, ventilation were also observed.

并以125W紫外线高压汞灯为光源，Ti/TiO2薄膜为工作电极，石墨电极为辅助电极，饱和甘汞电极为参比电极，建立了三电极的光电催化体系，甲基橙溶液为降解对象，并对其在Ti/TiO2薄膜电极上的光电催化降解进行了研究，观察外加电压、通空气等外加因素对甲基橙降解速率的影响。

This essay tries to improve the performance of mineral additive agent and compound many kinds of existing chemic additive agent.

本文对水泥稳定类基层外加剂进行研究是在已有研究的基础上，对其进行了改良，并在此基础上复合了不同种类的化学外加剂。

The main production and sales of concrete admixture series, the company was founded in 2006, are professional manufacturers of new admixture production, advanced production technology, a unique management tool to enable the company soon a large number of concrete alongside the dramatic title of the manufacturer.

主要生产销售混凝土外加剂系列，公司成立于2006年，是新型外加剂生产专业厂家，先进的生产工艺，独特的管理手段使本公司很快傲立于众多的混凝土生产厂家的头衔。

The results show that, in the lower voltage regime, the molecular currents decreased exponentially with the molecular length, and the corresponding decay constant is about 1.41/CH2. Furthermore, the decay constant is demonstrated to be almost independent of the external voltage.

研究结果表明，在低的外加偏压下，烷烃硫醇分子电流值随着分子链长度的增加而指数减小，其衰减常数约为1.41/CH2，且衰减常数基本上与外加偏压值的大小无关。

Based on the judgement on the existing of whether leading functional group or unleading functional group,if unleading exists,what about its bond type,with these pre-classification information,a new classification methods and uint structure model which can reflect the name,composition,stucture and function was put forward in this paper.

前言 高性能混凝土外加剂分子只存在磺酸、羧酸两种主导官能团，以磺酸、羧酸、&磺酸-羧酸&三种方式存在，因而把高性能外加剂分成磺酸、羧酸、&磺酸-羧酸&三大系列 [1、2 ]。磺酸系列外加剂的一个重要性能是高减水率，故有时将它称之为高效减水剂。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。