多步的

The azo derivatives were hydrolyzed on the condition of alky to get end products. The structures of azo derivatives of 4-ASA and intermediate products were characterized by melting point, TLC, MS, FT-IR, 1H-NMR and 13C-NMR spectra properties in details.

本课题探索了一条4-ASA偶氮化合物的多步合成工艺，得到了目标产物三个，对合成的目标产物和中间产物用熔点、薄层色谱法、MS、FT-IR、1H-NMR和13C-NMR进行了详细的表征，确定了它们的结构。

Multistep deposition process has been adopted in the preparation of superfine inorganic composite antibacterial powder, Ag~+ as crystal nucleus, packed outside by the hydroxid and phosphate precipitate of Ti and Zr elements etc., The optimal process conditions have been found from one-factor influence tests and multi-factor orthogonal test,and the optimal process conditions were: Ag iron was imported by silver ammine, and then 100ml Titanyl sulphate solution mixing with zirconium sulfate keep hot at 90 ℃ for 30 mins, and the Zr/Ti ratio is 0.15,and Na_2HPO_4 was added in the end.

超细无机复合抗菌粉体的制备采用以Ag~+沉淀物作为晶核，外包裹Ti、Zr等金属的氢氧化物沉淀和磷酸盐沉淀物的多步沉淀工艺，并利用单因素和正交试验法对制备工艺进行了优化，其最佳工艺条件是：Ag~+以银氨络合物引入，沉淀钛锆的反应时间为0.5h，反应温度为90℃，水解反应时体系总液量为100ml、Zr/Ti为0.15，沉淀物经水洗、干燥，于700℃煅烧4.0h；即得最终产品。

Then,the particle system in Vega Prime software is used to simulate the cauldron's flame and smoke.

更多一步的主火炬燃烧的视景仿真提供了粒子系统所需的数据。

In the experiment, compared to atmosphere distillation, low-pressure distillation is proved to be able to save more nourishment, remain more yeast for the fermentation with cornstalk and finally give more energy saving.

与常压精馏相比较，低压低温精馏能够减少醪糟中营养物质的损失，更多地保存了酶活力和发酵菌体的活性，为醪糟进行下一步的秸秆固态发酵饲料生产提供保证；而且有利于进行浓醪精馏，实现大幅度的节能。

In identity encryption area, Enyo is situated the first rank of the world, applied for many international and national patents successfully, and also holds security mail technology and products that only possessed by Enyo-Tech.

安邮科技专注于反垃圾邮件，安全邮件技术的研究，在基于身份的密码学领域处于世界领先地位，申请多项国际国内专利，拥有世界独步的安全邮件技术及产品。

Among the more and more intensive researches on NO transfer, a controversial issue regarding the mechanism is whether the NO group transfer from S -nitroso compounds occurs in a direct nucleophilic way where NO serves as the target or in a multi-step sequence initialed by homolysis of the S -NO bond.

NO转移反应的模拟研究日渐活跃。有关S-亚硝基化合物转移NO的机理存在两种争论，即以NO为靶心的直接亲核进攻还是由S-NO键均裂引发的多步过程。

In the first chapter of this thesis, we prepared the desired β-amino acid ester starting from 1-tridecanol and converted it to the corresponding γ-amino alcohol via LAH reduction and hydrogenolysis.

在论文的第一章，我们从十三醇出发，以S型苄基保护的α-甲基苄胺为手性源，经过多步反应制得光学纯的β-氨基酸酯衍生物。

In this subject, hardware circuits of the system were designed based on ATMEL's AT89S8252 single-chip computer and digital humidity-temperature sensor SHT11. This hygroscope finds itself with some attractive features, such as portability, handy operation, low power consumption, etc.

本课题以ATMEL公司的AT89S8252单片机和数字式温湿度传感器SHT11为核心设计了系统的硬件电路，通过液晶屏直观显示出测量结果，具有小型便携、操作简便、低功耗等诸多优点，并能通过串口与上位机通讯，以便对数据进行更深一步的处理。

Concepts covered include creating formulas; using ratios, proportions, and scale; working with integers, simple and multi-step equations, and variables.

概念涵盖的范围包括创造公式；使用的比例，比例和规模；工作与整数，简单和多步方程，和变数。

I'll talk more about this and our business priorities in my employee Webcast on July 19 at4 p.m. Pacific time.

我会在7月19日下午4点的员工网络会议上就我们下一步的工作和计划重点有更多详述。

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％。