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Wastewater containing titanium pigment was treated by microfiltration membrane, Nanometer titanium can be purified and concentrated by use of microfiltration. Operational conditions were optimized and the model was built. Finally, the amount of wash water was reduced. Based on the above research, the whole set equipment was designed, which can meet the needs in a titanium industry with a capability of 500 ton per year. Backflush and automatic control were used in the equipment, which has been steadily run two years, has been widely adopted in titanium industry. The technology has been widely adopted in titanium industry.In the recent years, whole set equipment of ceramic membrane was increasingly used in the recovery of desired production from fermentation broth in China. A new membrane process integrated with pretreatment of flocculation or coagulation was exploited to recover Inosine. ZrO2 ceramic membrane was used in the work, and the average permeation flux could reach 150L/m2.h under pH value of 3, transmembrane pressure 0.1MPa, CFV 3m/s, and temperature higher than 70C. The recovery ratio of inosine is higher than traditional recovery method, although inosine degraded under acidic and high temperature condition.

实验表明,ZrO_2膜处理肌苷发酵液的合适条件为pH=3、操作压力为0.1MPa、膜面流速3m/s、温度大于70度,此时可以获得平均渗透通量150L/m~2h,但由于酸性条件、高温下肌苷降解,导致肌苷收率有所降低,但仍高于传统肌苷提取方法得到的收率;为进一步提高肌苷得率,缩短提取工序,实验研究了絮凝剂预处理发酵液,解决碱性条件下由于蛋白析出导致膜污染加重的问题,研究表明采用CaCl_2絮凝并调节pH=11,可以获得平均渗透通量为180L/m~2h,肌苷得率大于95%;比较了三种肌苷提取工艺得到的产品质量,采用预处理与陶瓷南京工业大学博士学位论文膜分离结合的除杂工艺得到的粗昔质量与陶瓷膜分离、离子交换及活性炭吸附工艺生产的粗普质量相当,均优于传统的提取工艺;设计了每小时处理12一巧吨肌普发酵液的陶瓷膜成套装置,采用部分内循环的方式降低设备的能耗,简化了肌昔提取方式,提高了产品的收率和得率,由于减少离子交换和活性炭吸附,使得工厂废水排放量降低30一40%,降低酸、碱用量,有利于环境保护。

A new PA cell structure is designed to accelerate the drift velocity of the sample gas near the cell surface, so that the short response time at the flow rate of 100 sccm (standard cubic centimeter per minute) is achieved.

特殊设计的光声池结构提高了样品气体在池表面的流动速度,从而加快了氨分子在池表面吸附——解吸附的平衡过程,实现光声池对氨气浓度变化的快速响应。

Environmental issue has caused widely public concern. In this thesis, the mechanism of calcite cluster structure absorbing environmental infectant has been investigated using quantum chemistry calculation. Using B3LYP calculation method and taking 6-311++G (3df,2pd) basis set in our Gaussian calculations, the results show that the calcite cluster structure can absorb environmental infectant.

在本次研究中,采用了量子化学计算中的B3LYP方法以及6-311++G(3df,2pd)基组进行理论计算,其结果能很好的反映方解石表面分子簇结构吸附环境污染物的情况,为阐明方解石表面分子簇结构吸附环境污染物的机理提供了理论基础。

The conditions and mechanism of Zn2+ loaded on zeolite 13X and alumina werestudied by the orthogonal test. A series of desulfurizing adsorbents were prepared withzeolite 13X, alumina and 5A molecular sieves loaded with Zn2+ and Cu2+ by themethod of impregnation at ambient termperature and desulfurizing capability of thosewere investigated in model gasoline.

采用正交试验的方法,研究锌离子在 13X 和活性氧化铝上负载条件及锌离子负载机理,并采用室温浸渍法,将锌离子和铜离子负载于 13X 分子筛、活性氧化铝、5A 分子筛上,制备了一系列改性型的脱硫吸附剂,考察了这些脱硫吸附剂在汽油模拟体系中的脱硫性能。

Effect of solute adsorption on vapor pressure osmometry measurment was studied by four low molecular weight organic compounds and five narrow MWD oliomeric polystyrene samples with known average molecular weight in Knauer VPO apparatus.

在气相渗透仪上,用四个低分子量有机化合物和五个已知平均分子量的窄分布聚苯乙烯低聚体,对VPO方法中的溶质吸附效应作了研究,提出了一种对吸附效应作改正的方法。

Molecularly imprinted polymers of sulfamethazine(SM 2 ) were prepared with silica gel as a sacrificial material, methacrylic acid and 4 vinylpyridine(4 Vp) as functional monomers, glycol dimethacrylate as crosslinker. The polymer properties were investigated by static adsorption experiments. Scatchard analysis shows that the adsorption ability of MAA MIP is superior to that of 4 Vp MIP. The dissociation constant of MAA MIP is 9 59×10 -4 mol/L. The value of apparent binding a...

以磺胺二甲嘧啶为模板分子,分别用甲基丙烯酸和4乙烯基吡啶为功能单体,二甲基丙烯酸乙二醇酯为交联剂,采用牺牲硅胶法合成了磺胺分子印迹聚合物,通过静态吸附实验,系统研究了不同单体对聚合物识别性能的影响;Scatchard分析表明,以甲基丙烯酸为单体的聚合物具有较高的吸附能力,其离解常数Kd为959×10-4mol/L,最大表观结合位点数Qmax为3070μmol/g。

Cryptomelane was prepared by precipitation method and characterized as tetragonal crystal with specific surface area and abundant hydroxyl groups at its surface.

文章表征了由沉淀法合成的锰钾矿型化合物的多种理化特性,并应用于铅离子吸附的研究,对吸附反应机理进行了初步探讨。

In the course of establishing standard operating procedure, The temperature, time , the feasibility without decorticating and efficiency were investigated when alliinase was deactivated used a dry heating apparatus in tunnel type, but the efficiency can be achieved less than 70%, need to be improved; The reformative cribriform plate has been proved to be good in practice result in pulping enzyme-deactivated garlic without dehulling; The extraction efficiency achieved more than 90% when volumic ratio of 20% alcohol and water is 3 I 1 and 2:1 was adopted to extract alliin two times respectively; During exact filtration, the ratio of diatomite in precoating and filtration was 3% and 1% respectively, the losses of alliin adsorbed by diatomite in extraction solution were not remarkable. In the stage of alliin isolation by ion exchange resin, three simple and sensitive detected measures were successfully adopted to control the whole process; the efficiency of alliin isolation was similar to laboratory results; The alliin yield was over 50% in acidic fractions and the purity quotient of alliin achieved above 50% after drying; Furthermore, the phenomenon was found that losses of alliin were seriously affected by the temperature and time periods in concentration.

在制定中试生产标准操作规程中,考察了隧道式干热烘干机杀酶的温度、时间和效率,干热灭酶效率只能达到70%,待改进;改良的筛板使带皮打浆效果良好,证明非脱皮熟蒜打浆的可行性,减少了工序,降低了成本;提取过程中,20%酒精分别1∶3和1∶2提取2次,效率达90%以上;硅藻土板框过滤时,探索了精滤过程中提取液中预涂和过滤时硅藻土的比例分别为3%和1%,并考察硅藻土对蒜氨酸的吸附损失,滤液澄明度良好,蒜氨酸损失很少;在树脂吸附分离阶段,采用三种简便灵敏检测手段控制生产过程,分离蒜氨酸的效果与实验室一致,酸性流分中蒜氨酸收率可达50%以上,干燥后蒜氨酸纯度达50%以上;试验发现浓缩蒜氨酸洗脱液时温度和浓缩时间对蒜氨酸损失的具有很大影响。

The influence of many factors on hydrogen storage capacity is emphatically analyzed, such as the zeolitic structures, Si/Al ratio, type of cations in zeolites and the difference of adsorption experimental conditions, etc.

重点分析了沸石的结构类型、硅铝比、阳离子类型及吸附实验条件差异对储氢量的影响,并讨论了超临界吸附理论模型的发展状况,最后探讨了沸石作为储氢材料的可行性和发展方向。

A simple and efficient method for concentration of enteroviruses from water sample was established based on the membrane adsorption-elution method combined with eluant concentration.

文章摘要:在膜吸附-洗脱和洗脱液浓缩相结合的基础上,建立了一种简便实用的水中肠道病毒浓缩方法,通过实时定量RT-PCR检测,比较了不同材料和不同孔径的微孔滤膜对病毒的吸附效果;对膜洗脱方式进行了改进;研究了在洗脱液浓缩过程中,PEG浓度对于病毒回收率的影响。

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But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。