查询词典 ir

The results of IR and DSC indicated that the curing reaction of BMI-modified phenolic resin mainly consists of two steps: the allyl groups in the Novolak resin react with maleimide group via"Ene"addition, and addition reactions of the C=C bonds formed thereby are followed.

IR与DSC方法研究表明：BMI改性酚醛树脂的固化反应主要是Novolak树脂上的烯丙基首先与酰亚胺基团的烯加成反应，然后烯加成反应所形成的C=C双键发生进一步加成。

The methods of IR and others were carried on in order toverify the structural formula of XN. The validation of analytical procedures wasconducted according to quality standard of XN in supplement of ChinesePharmacopoeia in 2002. The results show that the structural formula of XN isright and XN can be analysed in accordance with the quality specification of ChP.The results of three lots repeat tests show that the optimal process for XN wasrepeated excellently and quality of products is stable and controllable.

所合成的烟酸占替诺经红外分光光度法等波谱测定，证明其结构正确；经检验方法学验证，确证该产品适用于按《中国药典》质量标准检验；经三批次重复验证试验，结果表明优选的烟酸占替诺合成工艺重现性好，所得产品质量可控，收率为91.1%，接近文献报道的最高收率。

All the derivatives were subjected to elemental analysis, FT-IR analysis, and Congo red test and their degrees of substitution were determined.

对虎奶多糖进行化学修饰，制备了多种不同取代度的羧甲基化和硫酸酯化虎奶多糖，并分别进行了元素分析、FT-IR分析及GPC分析，测定了它们的取代度和分子量。

Their IR, Raman, XPS, TG-DTA and fast-atom-bombardment mass spectra are quite different and indicate that they have different d.p.

这种差异主要因制备方法不同，获得样品中羧基间氢键作用以及Ge-O环尺度和键角不同引起的。

The depressing ability of the macromolecule organic depressants can be improved by the increase of their D.S.. The high D.S. CPVA and CPEG show strong depressing ability to calcite, while CPEG indicates strong depressing ability to diaspore, and HPAM to pyrite.The depressing mechanism of organic depressants was confirmed by the measurements of zeta potential, contact angles, adsorption capacity and IR spectrum.

利用动电位、接触角、吸附量和红外光谱等测试方法和手段，探讨了抑制剂的作用机理：苯氧乙酸类小分子抑制剂与方解石之间可发生较强的化学作用，可以选择性地吸附在方解石表面，使捕收剂发生解吸或阻止捕收剂在矿物表面的吸附而使矿物受到抑制；大分子抑制剂则主要是依靠亲固基吸附在矿物表面，再利用其长链的强亲水性而使矿物受到抑制。

This work is the outcome of the process by which students obtained the ir Architects diploma at the School of Architecture, University of Talca in Chile.

这项工作成果的过程，学生获得了建筑师的文凭在建筑学院，大学在智利塔尔卡。

Finisterre represent Air, Herati represent Fire, Ir'Kithlen represent Water and the Tolgarien represent Earth.

费利斯特利象徵空气，赫拉提象徵火焰，伊尔凯斯伦象徵水而托尔加立安则象徵大地。

TGA, FT-IR, UV, WAXD and ESCA methods were used to detect both gas phase and condensed phase, deriving from decomposition of PVC. Meanwhile, the configuration of FRs was studied. Based on the experiments data, the FRs of PVC was divided into three kinds, and flame retardancy and smoke suppression mechanism mode for each kind of FRs was proposed.

根据所得实验数据的对比，将PVC的阻燃抑烟剂分为三个类别，分别建立了每一类化合物对PVC阻燃抑烟作用的分子模型，分别解释了各种实验现象，复配出两种阻燃抑烟性能最佳的阻燃抑烟剂。

Compound 5 reacted with Grignard reagent of 9 followed by cyclozation to afford target molecule 11. All intermediates and target product were confirmed by IR, 1H NMR and HRMS.

化合物5与9的格氏试剂偶联和关环反应完成目标产物3-羟基－10-去甲基－12-甲氧基－13-甲基罗汉松烷(11)的全合成。

I want to be the f ir st.

我想做第一。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。