水溶液

On the basis of summarizing separation method of acetic acid-water system, we studied the azeotropic distillation process of acetic acid-water system, selecting butyl acetate, isobutyl acetate and isopropyl acetate as entrainers. The influence of packing height, ratio of water to entrainer and acetic acid initial concentration to separation effect of azeotropic distillation was studied in detail. Simulation calculations of general distillation and azeotropic distillation were carried out. The influence of reflux ratio, theoretical plate, feed position, feed temperature and feed concentration to distillation process were discussed. Preferred process operation parameter, which had guiding meaning to practical production of distillation process were obtained. Basic data for the process amplifying design of azeotropic distillation tower were provided. Invest and operation energy consumption of two distillation methods were compared. The elementary technical design of azeotropic distillation tower was carried out on the basis of result of simulation calculation. The type of major auxiliary equipments and inner parts of packed tower were selected.The research results are as follows:(1) Butyl acetate, isobutyl acetate and isopropyl acetate could be selected as entrainer, and separation effect was near.

本文在综述醋酸-水体系分离方法的基础上，以醋酸丁酯、醋酸异丁酯、醋酸异丙酯为挟带剂，对醋酸水溶液进行共沸精馏过程研究，详细研究了填料高度、水与挟带剂的配比、醋酸初始浓度等对共沸精馏分离效果的影响；对醋酸-水体系进行普通精馏和共沸精馏过程模拟计算，讨论了回流比、理论板、进料位置、进料温度和浓度对精馏过程的影响，获得了对醋酸-水体系精馏过程实际生产具有指导意义的较佳的工艺操作参数、共沸精馏塔的工艺设计放大的基础数据，并对两种精馏方法的投资、操作能耗进行了比较；同时在共沸精馏模拟计算的基础上进行了共沸精馏塔的初步工艺设计计算，并对填料塔的主要辅助设备及塔内件进行了初步选型。

Remember to clean your wild bird feeders at least twice a week with a mild soap and water solution.

记住要清洁您的野生鸟类喂食器至少两次温和的肥皂水溶液一个星期。

In the invention, the water soluble chitosan is adopted as a vector and directly coupled with the folacin in water solution.

本发明采用水溶性壳聚糖为载体，在水溶液中直接与叶酸偶联，所用试剂价格低廉，制备方法简单，便于大规模的工业化生产。

After 3d of gastric gavages,peripheral blood was taken from experimental mice to extract the lym phocytes.Then single cell gel electrophoresis test Was used to detect the inhibition of DNA.DNA damage in mice.

材料与方法：固相萃取水中有机物，用不同浓度维生素C水溶液(50、100、200 ms／ks)与有机物以不同方式处理(同时灌胃、维生素C预处理、维生素C后处理)，分别给小鼠灌胃3 d后，取外周血淋巴细胞进行单细胞凝胶电泳实验，检测细胞DNA的损伤情况。

In butter, globules of a watery solution are locked away in a sea of fat.

在黄油中水溶液的小球体藏在很多脂肪之中。

The adsorption of goethite, hematite and amorphous ferrihydrite for phosphate was studied through the isothermal adsorption experiment.

本文通过铁氧化物对水溶液中磷酸根的等温吸附实验，初步对比研究了针铁矿、合成氧化铁黄、赤铁矿和无定形氢氧化铁对水中低浓度磷的吸附作用。

0Wt% sodium chloride solution using gold capsule in rapid quench pressure vessel on supercritical conditions.

超临界条件下用金管作容器进行氯化钠水溶液体系中WO〓溶解度实验时，金管中的金可以溶解到体系中。

Methods BTXA labeled with125Iwas obtained. The radioactivitymeasurementwas taken tomeasure the solubility ofBTXA in gel and BTXA solution. The rightgastrocnemiusmuscles of12 SD ratswere injectedwithBTXA geland the leftgastrocnemiusmuscles injectedwith normal salinewere used as controls. HE staining and 1% gold chloride stainingwere used to study the tissue changes 6 months and 12 months afterBTXA gel injection and transmission electronmicroscopy was used to observe the ultrastructural changes.

将BTXA行示踪标记配制125I-BTXA水凝胶与125I-BTXA水溶液，进行样品放射性强度测定。12只SD大鼠用随机数字表法分为A、B两组，每组6只，大鼠右侧腓肠肌注射BTXA水凝胶，左侧腓肠肌注射等体积生理盐水作对照，于注射后6个月、12个月切取腓肠肌标本，常规病理HE染色、1%氯化金染色，透射电子显微镜观察组织结构变化。

A novel guar gum-g-poly superabsorbent was synthesized by the solution copolymerization between natural guar gum and acrylic acid using ammonium persulfate as an initiator and N,N′-methylenebisacrylamide as a crosslinker.

以天然瓜尔胶和丙烯酸为原料，过硫酸铵为引发剂，N，N′-亚甲基双丙烯酰胺为交联剂，采用水溶液聚合法制备了瓜尔胶接枝聚丙烯酸高吸水性树脂。

The mixing properties of two-layer combined impellers in xanthan gum water solution is sutdied,different kinds of combinations of impellers are compared by oxygen transfer coefficient which can indicate the mixing state of microcosos.

对两层组合桨在黄原胶水溶液中的混合性能进行了研究，采用能反映微观混合状态的容积传氧系数对多种组合桨进行了比较。

This paper demonstrated the impact on the environment today, an important factor is Education.

本文主要展示了当今影响环境的一个重要因素——教育。

Article 16 The power to interpret these Procedures shall remain with the Ministry of Agriculture and CAA.

第十六条本程序由农业部、国家认证认可监督管理委员会负责解释。