查询词典 chemical method

The article described the procedure and result of preparing Silicon-oil -based Fe_3O_4 magnetic liquid with chemical coprecipitation method.

文章阐述了用化学共沉淀法制备硅油基Fe_3O_4磁性液体的研究结果。

Methods Dextran-coated iron oxide nanoparticles were prepared by ultrasonic and chemical coprecipitation method and the characteristics were evaluated.

利用超声波的粉碎空化作用，采用化学共沉淀法合成葡聚糖磁性纳米微粒。

Experiments are performed to confirm the chemical etching method for defining the crystallographic orientation of silicon single crystals.

通过实验肯定了硅单晶的化学侵蚀定向方法，找出抛光液的最佳配比及抛光时间。

By using chemical simulation method and reaction kinetics principle,optimumization of The temperature distribution and the cuprammonia composition control have been performed.

本文分析研究了铜洗塔的反应吸收和传质机理，采用化工模拟技术及反应动力学原理对铜洗塔温度分布、铜氨液稳定控制进行了优化研究和设想。

Methods:After the animal models of leukodermia had been prepared by chemical decolour method,the animal models were separately treated with Qu-Bai tincture and Sicorten ointment,and the curative effects of both were compared.

用化学脱色法制备白癜风动物模型，用祛白酊对白癜风动物模型进行治疗，并与新适确得进行比较实验。

The experimental vitiligo models were prepared by chemical decolour method in Guinea Pigs. And we choose the Meladinines recommeded level (0.15%) as high concentration, use the high, middle and low concentration levels (0.15%, 0.075 %, 0.03 %) of LMOP gels to progress the pharmacodynamics comparative study, 8-MOP tincture was used as controll group, observing the melanin distribution, the number of DOPA active cells, the number of hair follicles contented melanin, the levels of ChE and MDA of the experimental vitiligo models.

用化学脱色法制备豚鼠实验性白癜风动物模型，以市售敏柏宁酊的推荐使用浓度(0.15％)为最高浓度，设定LMOP凝胶低、中、高三个浓度组(0.03％，0.075％，0.15％)，进行药效学比较性研究，以8-MOP酊剂(敏柏宁酊稀释至含8-MOP 0.15％)为对照，考察其对皮肤黑素分布、DOPA阳性细胞数、含黑素毛囊数、胆碱酯酶及丙二醛的影响。

Take DMSO swollen treatment and DEA-SO2-DMSO decrystallization treatment for example, the X-ray diffraction and the Tobolsky's intermittent stress relaxation of treated woods were determined during soaking in water, analyzed the effects of water on crystal degree and inter-cohesion of treated woods. According to these continuous relaxation curves measured in water with different temperatures, various thermodynamic quantities were obtained by using Eyring absolute rate theory, and reviewed the chemical reactions in wood which occur in different relaxation process. For the first time quantify these crosslinkings formed in the process of tensional relaxation by using the SMCIR intermittent stress relaxation way, and defined the cross-linking reaction types. In order to find out the contribute of drying to the fixation of deformation of chemically treated wood, stress relaxation of oven-dry untreated and treated wood was measured during the process of temperature elevation and descend, then analyzed the effect of temperature change on relaxation mechanism of treated oven-dry wood. According to continuous relaxation curves of oven-dry treated wood under various constant temperature, calculated the thermodynamics of relaxation process and discussed the mechanism of molecule change in wood, at the same time, also quantified these cross-linkings produced in wood by intermittent method and on the basis of which the model of molecular change during relaxation process of chemically treated was constructed.

以DMSO膨胀处理及DEA- SO2-DMSO非晶化塑化处理为例，测定了两种处理木材在水浸渍过程中的X射线衍射及Tobolsky间歇应力松弛，分析了水对处理木材结晶度及内部凝聚力的影响；通过未处理和两种处理木材在不同温度水中的连续应力松弛测定，应用Eyring的绝对速度反应理论计算并获得了松弛过程中的各热力学量，分析了在水中松弛过程中不同阶段木材内部发生的化学反应；并首次采用SMCIR连续·不连续双曲线应力松弛法定量了轴向拉伸应力松弛过程中木材内部产生的架桥量，明确了交联反应的类型；为了了解干燥对处理木材塑性变形固定的影响，测定了未处理和两种处理绝干木材在温度下降过程和上升过程中的应力松弛，分析了温度变化对处理绝干木材应力松弛的影响；根据多个温度水平下的连续应力松弛测定曲线，计算松弛过程的热力学量，考察了绝干木材在松弛过程中内部发生的分子变化机理，同时也用间歇法定量了木材内部新形成的架桥量，并在此基础上构筑处理木材在松弛过程中内部分子构造的变化模型。

To definitize the research object, task and basic research method of chemical reaction engineering.

明确化学反应工程的研究对象、任务和基本研究方法。

We prepared the ordered porous alumina membrane by a two-step anodization method in oxalic or sulfuric acids, which is a self-ordered hexagonal array of cells with an adjustable pore diameter of 20-150nm and a different pore structures (i.e. Y-branched, dendriform, toothed and torous ones). Furthermore, the template-electrodeposition, vapor-catalytic growth, and controlled chemical etching were developed for well-aligned carbon nanotubes and oxide nanopillars with adjustable diameter, Al2O3-AlN one-dimensional heterojunction, Y-junction and dendriform metal nanowires, as well as Y-junction, and torous carbon nanotubes. The resultant one-dimensional junctions were characterized by XRD, SEM, TEM,HRTEM, and STM, and the field emission of the well-aligned carbon nanotubes and the luminescence of ZnO nanopillar array have also been mearsured.

完善和发展了阳极腐蚀法制备多孔氧化铝膜的方法，制备出了孔径在20-150nm之间可调和具有不同孔结构（如Y形、树枝状、锯齿状）的系列多孔氧化铝模板，在此基础上，利用电化学沉积、气相催化生长和化学控制腐蚀等方法，成功地生长出具有可调直径的碳纳米管和氧化物纳米柱有序阵列、Al2O3-AlN异质结纳米线、Y形和树枝状的金属纳米线以及Y形、藕节形和锯齿形的碳纳米管等多种一维结纳米材料及其阵列体系，探索了基于模板孔壁内沿生长一维结纳米材料的机制，较系统的研究了碳纳米管阵列的场发射性能和氧化锌纳米柱的发光性能，为低维纳米材料器件化提供了实验基础。

Pyrolytic carbon coating and successive SiC matrix were respectively prepared by chemical vapor infiltration in T700 kind integer felt. The subsequent reactive melt infiltration method was adopted to densify it further and C/SiC composites were successively prepared. The microstructure and effect of interface on flexural properties were thoroughly investigated.

摘 要：以T700炭纤维准三维编织针刺整体毡为预制体，在炭纤维表面CVI预沉积热解炭涂层，利用化学气相渗透-反应熔体浸渗法制备C/SiC复合材料，观察材料的微观形貌，并探讨界面对弯曲性能的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。