前还原

词组短语

pre reduction

与前还原相关的网络例句 [注：此内容来源于网络，仅供参考]

In the one half part, according to the strontium nature, thermodynamic calculation of correlative reaction and the principle of the vacuum aluminothermy reduction process, with the laboratory findings of preparation strontium by vacuum aluminothermy reduction compared and analyzed in different parameter conditions, a variety of factors which effect the decomposition rate of SrCO_3 and the percent reduction of strontia are gotten out. The factors include that the decomposition rate of SrCO_3 is influenced by different addition and pressure. They also include that the percent reduction of strontia is influenced by excess coefficient of reducing agent aluminium powder, the particle size of raw material or reducing agent, the pressure of barbecuing, temperature and reduction time. According to those, we can draw the conclusion as follows:(1) Decomposition temperature of SrCO_3 is decreased by adding carbon and alumina in different degree.(2) With quantitative carbon added under the vacuum condition, the decomposition temperature of SrCO_3 is decreased obviously, which can fall 150℃ compared with atmospheric pressure.(3) In keeping 1150℃ of 2.5h, under the 5Pa vacuum condition, the decomposition rate of SrCO_3 nearly keeps in 99% steadily.

在前半部分的真空铝热还原法中，根据锶的性质、相关反应的热力学计算及真空铝热还原法原理，通过对不同参数条件下的真空铝热还原法生产金属锶的实验结果的分析比较，得出了影响SrCO_3的分解率和氧化锶的还原率的种种因素，具体因素包括不同添加剂、不同气压对SrCO_3分解率的影响，还原剂铝粉的过量系数、原料与还原剂的粒度、制团压力、温度和还原时间等对氧化锶还原率的影响，得出具体结论如下：(1)添加碳和Al_2O_3能不同程度的降低SrCO_3的分解温度；(2)真空条件下加入一定量的碳可显著降低SrCO_3的分解温度，比之常压下可降低150℃之多；(3)在1150℃恒温2.5h、真空度达到5Pa的条件下，SrCO_3的分解率几乎保持稳定在99％；(4)氧化锶的还原率随还原剂过量系数的增大而增大，但是趋势越来越小，当过量系数超过25％后，氧化锶的还原率几乎不再增加；(5)氧化锶的还原率随原料与还原剂的粒度的变细而增加；(6)氧化锶的还原率随制团压力的增加而增加，但超过一定值后，氧化锶的还原率反而会下降；(7)氧化锶的还原率随还原温度的升高而增加；(8)氧化锶的还原率随还原时间延长而增加，在本实验条件下，超过2.5h趋于稳定。

He hypothesis has been proved by SEM and TEM. The characterization of TPR and XPS showed that there had reduction process of oxide species before crystallization, and the reduced species and metalloid content increased generally on the surface of catalysts.

PR和XPS表征证实在负载型非晶态合金Ni-P/TiO〓的晶化温度前，有金属氧化物种的还原过程，还原后，催化剂表面的还原态物种增多，类金属相对含量普遍增加。

Molybdenum carbide catalysts were prepared by temperature-programmed reaction using CH4/H2 gas mixture to carburize molybdenum trioxide at different temperatures, then were characterized with XRD and BET.

以MoO3为前躯体，CH4/H2为还原碳化气，采用自制的程序升温还原碳化反应装置制备出Mo2C催化剂，并用XRD、BET进行表征。

A method of production of a reduction resistant dielectric ceramic composition having a superior low frequency dielectric characteristic and further improved in accelerated lifetime of insulation resistance, specifically a method of production of a dielectric ceramic composition containing a main component including a dielectric oxide of a specific composition, a first subcomponent including a V oxide, a second subcomponent containing an Al oxide, a third subcomponent containing an Mn oxide, and a fourth subcomponent containing a specific sintering aid in a specific ratio, including a step of mixing at least part of the materials of the subcomponents excluding one or both of at least the material of the third subcomponent and material of the fourth subcomponent with the starting materials prepared for obtaining the material of the main component to prepare the pre-reaction material, a step of causing the prepared pre-reaction material to react to obtain a reacted material, and a step of mixing the materials of the subcomponents excluded when preparing the pre-reaction material with the obtained reacted material to obtain a dielectric ceramic composition.

本发明提供一种介电陶瓷组合物的制造方法，其中介电陶瓷组合物以特定的比例含有如下成分：含有特定组成的介电体氧化物的主成分，该主成分可以提供具有优异的低频率介电特性的、绝缘电阻的加速寿命进一步提高的耐还原性介电陶瓷组合物的制造方法，含有V氧化物的第1副成分，含有Al氧化物的第2副成分，含有Mn氧化物的第3副成分，以及含有特定的烧结助剂的第4副成分；该方法包含如下工序：将至少除去第3副成分的原料和第4副成分的原料的一种或两种的其它副成分原料的至少一部分，与为了得到主成分原料而准备的起始原料混合，准备反应前原料的工序；使准备的反应前原料反应而得到反应后原料的工序；以及在所得的反应后原料中，混合在准备反应前原料时除去的副成分原料，得到介电陶瓷组合物原料的工序。

The banjo-type axle housing 10 comprises an enlarged central, or banjo, portion 12 defining a hollow interior adapted for housing a differential assembly therein, and a pair of sleeve-like axle beam portions 14R and 14L outwardly laterally extending from opposite sides of the center portion 12 for housing axle shafts. The central portion 12 has a front carrier opening 16 formed therethrough on its forwardly facing side, and a rear opening 18 formed therethrough on its rearwardly facing side.

桥壳banjo-type组成的中央，放大10分12个定义斑鸠，或是一个空洞的室内适合住房差动总成，和一双sleeve-like轴部分梁横向延伸14L 14R外，从两端的中心部分12住房刚性车轴。12有一个中央部分开放前载体上16形成籍由氧化还原，使得面对18形成一个开放其rearwardly面对籍由氧化还原。

MgO-C brick has a good erosion resistance but Al〓O〓-C brick is better. Corrosion mechanism for refractory without carbon is that FeO and oxides of molten slag take place chemical reaction with constituents of refractory and forming low fusing point compounds to be dissolved in molten slag. For those refractory containing graphite carbon is to be decarburized in advance and to form decarburizing layer and metamorphosis layer. The subsequent corrosion is decarburizing and taking chemical reaction to form low fusing point compounds and dissolved in molten slag at the same time.

铁浴中硅和钛的扩散是影响铁浴及熔渣与耐火材料作用的重要因素，耐火材料中添加的TiO〓和SiC受熔渣氧化和侵蚀，将被部分还原形成Si，Ti向铁浴中扩散，Si、Ti在铁浴中的扩散研究结果是： D〓=1.84×10〓exp（－5988.7/T） cm〓/S E〓=49766 J/mol D〓=7.76×10〓exp（－53225.5/T） cm〓/S E〓=442304 J/mol 铁浴式熔融还原熔体对粘土砖，高铝砖，镁砖的侵蚀速度很高，镁碳砖抗侵蚀能力比前几种耐火材料强，但不如铝碳砖；对不含碳耐火材料在熔体中的侵蚀是熔渣中FeO及其它氧化物与耐火材料组分的化学反应形成低熔点物熔蚀进入渣相，产生损毁。

By injecting commercially pure argon to make pressure in furnace up to 66.66 kPa and controlling refining temperature between 1 450 ℃ to 1 500 ℃, adding Mg-Ca alloy 50 kg/t and fluxed additions CaF\-2 11 kg/t, after refining the phosphorus content in steel 00Cr18Ni10 further decreased to (50～60)×10 -6, and oxygen and sulphur content in steel decreased to (4～6)×10 -6 and 15×10 -6 respectively.

采用CaC2 CaF2 法脱磷容易增碳，使后期冶炼工艺复杂，因此最好在吹氧前使用；CaC2 CaF2 也可用作喷吹SiCa粉脱磷时的覆盖渣，可起到保持还原气氛的作用。SiCa CaF2 法是唯一在工业规模上有少量应用的还原脱磷法，而且氧化脱除增加的硅比较容易。

Are you sure you can do for packaging business card printing and membership card making high-quality printing, such as mesh point of reducing passbys can be produced by more than the traditional print version of dot, richer figure, image level, so that the packaging business card printing and membership card making quality be increased; membership card before digital version of a single stage, eliminating film at work affected by environmental pollution by dust, so that the printed matter almost no stains, suites a cleaner, clearer, and so on, these advantages, there is no dispute, but the point is, since the packaging business card printing and membership card making products with other color business card printing and membership card making products product characteristic of the existence of a certain amount of difference, is targeted at users of the product quality requirements there are differences, as opposed to the traditional membership card before production, CT

确实能为包装制卡和会员卡制作提供高品质的印版，比如网点还原性较好，能产生比传统印版更锐化的网点、更丰富的图，的图象层次，从而使包装制卡和会员卡制作品质量得到提高；会员卡制作前数字化生产一次成版，避免了胶片在工作中受环境灰尘的污染，使印品几乎无脏点，版面更干净、更清晰等，这些优势是没有任何争议的，但关键是，由于包装制卡和会员卡制作品与其他彩色制卡和会员卡制作品在产品特点上存在一定的差别，所针对的用户对产品品质要求存在差异，相对于传统会员卡制作前生产的印版，CT

Then we applied these chrial ligands to asymmetric borane reduction of w-bromoacetophenone and diketones.

将其应用于前手性单酮及二酮的还原中，其中双方酰化脯氨酸在1，6-二苯基-1，6-己二酮的还原反应中可获得最高为90％的ee值。

The new system has been applied to the asymmetric catalytic reduction of pro ketones .

第一次成功设计、合成了新型的双手性口恶唑硼烷还原体系，并将其应用于前手性酮的不对称还原。

与前还原相关的网络解释 [注：此内容来源于网络，仅供参考]

grapevine：交叉步

向左侧交叉步(grapevine)两臂前后摆动. 右脚原地小跳四次,同时左腿摆至侧下举、右前下举、左侧下举、还原.

p simile：弱奏同前

a tempo还原速度 | p simile弱奏同前 | molto leggiero很轻巧地

superoxide anion：超氧阴离子

探讨中性粒细胞参与银屑病的机制.方法 作中性粒细胞培养.应用酶联免疫吸附法检测脂多糖(LPS)刺激前后中性粒细胞分泌白细胞介素-8(IL-8)、肿瘤坏死因子-α(TNF-α)的水平,应用细胞色素C还原法检测LPS刺激前后中性粒细胞超氧阴离子(Superoxide anion)的水平.结果 在脂多糖刺激前、后,

prerectal：直肠前的

prerecord 事先录音 | prerectal 直肠前的 | prereducing 预还原

prerectal ridge：直肠前脊

prerecorded track 预记录道 | prerectal ridge 直肠前脊 | prereduced burden material 预还原炉料

prereduction：预先还原 前减数

prereducing 预还原 | prereduction 预先还原 前减数 | prereductional 前减数的

prereduction：前减数

prereducing 预还原 | prereduction 前减数 | prereduction 预先还原

prereduction method：预还原法

prereduced burden material 预还原炉料 | prereduction method 预还原法 | prereduction purification 还原前净化

prereduction purification：还原前净化

prereduction method 预还原法 | prereduction purification 还原前净化 | prereductional division 前减数分裂

defender closes in：防守关门

因为防守方没有练习这些因应技巧,例如交换防守(switching)或者由前硬挤跨过防守(over the top)、由设立掩护者中间穿出防守(slide through)、防守关门(defender closes in)、甚至做障碍缓冲(show or hedge)固守禁区之障碍还原(show and recover)等技巧,