查询词典 SN

A hydrolysis approach has been developed to prepare polyurushiol -SnO 2 hybrid film from urushiol-Sn polymer which is synthesized with urushiol and stannic chlorde.

先由漆酚和四氯化锡合成非螯合型漆酚锡聚合物，然后采用水解法由该聚合物与NaOH水溶液制得聚合漆酚-SnO2 杂化材料。

The present state of stress field of Yadong-Golmud-Xitieshan profile section takes SN direction compression, EW direction expansion and vertical direction uprising as the dominant factors.

青藏高原亚东-格尔木-锡铁山地学剖面以南北向挤压、东西向拉张、垂直方向隆升为主的现今应力场状态。

The paper describes the process ofφ20mm Cu-Sn alloy wirebar production in continuous casting and roiling process,analyzes the impact of the wirebar s oxygen and tin content distribution on production stability, describes the cold-forming process of contact wire manufacturing by drawing machine,and studies and compares anti-drawing strength and extension capability of it.

介绍了采用连铸连轧工艺生产φ20mm铜锡合金线坯的过程，分析了线坯氧含量、锡含量对生产稳定性的影响。

A prize of 50 is not to be sn zed at.

50英镑的奖金可不是个小数。

The results show that the sample is well dispersed particles with high purity and an average size of about 1 μm. Favorable substances of Ca2 and Sn appear during the cycling of zinc electrode containing CaSn6, Ca2 has continues to react with ZnO to produce calcium zincate, which can highly reduce the dissolvability of anode active materials and greatly improve the cycling performance of zinc electrode. The simulated Ni/Zn battery using CaSn6 and ZnO as the active material of zinc electrode has a high discharge plateau and an excellent cycling ability, and it can retain about 72.6% of initial discharge capacity after 50 charge-discharge cycles.

研究结果表明：通过共沉淀方法合成的CaSn6粒度分布均匀，平均粒径在1 μm左右，并且具有较高的纯度；添加CaSn6的锌负极在循环过程中游离出了Ca2和金属锡等有益物质，并进一步与ZnO反应生成锌酸钙，降低了锌负极活性物质在电解液中的溶解性，从而显著提高了锌电极的循环性能；以CaSn6与ZnO的混合物为负极活性物质的模拟锌镍电池具有较高的放电平台和优良的循环性能，经过50次循环后，电池放电容量保持为起始容量的72.6%。

The super microporous tin-doped zirconium oxides were successfully synthesized by sol-gel method using zirconyl chloride as Zr source, tin chloride as Sn source and cetyltrimethylammonium bromide as template under hydrothermal or refluxing conditions.

以二氯氧锆和四氯化锡为金属源，十六烷基三甲基溴化铵为模板剂，用溶胶-凝胶法在水热或回流条件下成功合成出了锡掺杂的超微孔二氧化锆材料。

The albitite is characterized by enrichment of Na2O and SiO2 as well as trace elements suchas Au, As Sb,B and depletion of MgO, MnO,K,O and trace elements which include Cu, Ni,Co,Pband Zn.

钠长石岩富Na、St、Al、Mg、Mn、K，在微量元素方面富An、As、Sn、B、Cu、Ni、Co、Ph、Zn，稀土元素的含量较低，配分模式为平缓右倾曲线。

WH525 antiwear type oil film bearing oil, composed of deeply refined Daqing 500 SN as base oil and some additives such as antioxidant, emulsion breaker, EP antiwear agent , rust inhibitor and antifoaming agent, and so on, was developed.

以大庆500SN为原料油，经深度精制后作为基础油，添加适量的抗氧剂、破乳剂、极压抗磨剂、防锈剂和消泡剂等，研制出WH525抗磨型油膜轴承油，其质量指标达到MobilVacuoline525油膜轴承油指标要求。

Objective To study the changes in maxilla,mandible and SN after orthodontic treatment with four premolars extracted in bimaxillary protrusion in adolescents and provide clinical useful data for predicting curative effect after orthodontic treatment.

目的：研究青少年双颌前突患者拔牙矫治前后上颌骨、下颌骨及前颅底的变化，为临床预测矫治后疗效提供临床依据。

Methods This study selects 17 bimaxillary protrusion's adolescents and contrast 8 hard-tissue controls before and after orthodontic treatment with Paired t Test to evaluate the changes in maxilla, mandible and SN.

对17名青少年双颌前突患者拔牙矫治前后的8项硬组织指标进行对比，通过配对t检验来评价治疗后患者上颌骨、下颌骨及前颅底的生长变化。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。