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The eluent was evaporated to near-dry under nitrogen and then redissolved with methanol-0.1% formic acid(1∶1,by volume),finally determined by HPLC-MS/MS.The linear range of the calibration curve was 0-50 μg/L for all pyridine herbicides.

在大白菜和橙子2种基质中分别添加5.0、10.0和20.0μg/kg3个水平，玉米基质中添加5.0、10.0、20.0和40.0μg/kg 4个水平的4种吡啶类除草剂混合标准溶液，平均回收率为70%~117%，方法的相对标准偏差小于15%。

However, the conversion rate of glycerol produced from the first stage using cornstarch to 1,3-propanediol from the second stage was only 26.5 % in 31h and the final concentration of 1,3-propanediol was 13.4 g/L. The productivity of 0.43 g/ of the second stage was much lower than that of a two-stage-fermentation from glucose （1.65g/ L） or of single fermentation from saponified glycerol, which is

多年来，研究人员在甘油生物歧化过程的代谢途径、动力学特征等方面已进行了较为深入的研究，甘油作为唯一碳源的最大理论摩尔转化率为72％，辅助底物的使用可以将甘油转化率提高至100％，发酵液中1，3一PD的最终浓度可以达到65～70 g／L3 。。。。。。

Content of water-soluble material— Disperse about 10 g, accurately weighed, in 800 mL of water, accurately measured, and stir for 1 minute every 10 minutes during the first 30 minutes. Allow to stand for an additional hour, or centrifuge, if necessary. Decant about 200 mL of the aqueous slurry onto a rapid-filtering filter paper in a vacuum filtration funnel, apply vacuum, and collect about 150 mL of the filtrate. Pour the filtrate into a tared 250-mL beaker, weigh accurately, and calculate the weight, in g, of the filtrate, W3, by difference.

水中可溶物含量：取本品10g，精密称定，准确加入800mL水，在30分钟内，每10分钟摇一次，每次摇一分钟，然后再放置1小时，必要时可用离心机离心，轻轻倒出200mL上清液于一真空过滤漏斗上，快速过滤，收集大约150mL的滤液，置于一已知重量的250mL烧杯中，精密称定，计算以g表示的滤液重量(W3)，。

The linear range of the method was 0.002 5-0.015 μg/mL for Ir with t...

方法的线性范围为0.002 5~0.015μg/mL，检出限为6.38×10-6μg/mL。

Penicillin G sulphoxide is esterified by N,N′-bistrimethylsilyl urea under the temperature 55℃ with a molar ratio 2.5∶1 between BSU and sulphoxide,and the ester obtained is ring-enlarged in the toluene under refluxing with the exist of catalyst-pyridine acetyl bromide.

摘 要 本文在制得青霉素G亚砜的基础上，完成了重排酸的扩环反应，重点探讨了扩环反应的最优化条件。青霉素G亚砜与N，N′-双脲在55℃下反应，得到亚砜的酯化物。

Acetate Substitution, A benzene solution (10 mL, 20% w/v) of alkyl halide also containing 0.5 g of PEG or tergitol was added to 1.5 g of solid, dry potassium acetate and the resulting suspension heated to reflux.

醋酸换人，苯液（ 10毫升， 20 ％瓦/五）烷基卤化物还含0.5 g的聚乙二醇或tergitol添加以1.5克的固体，干燥醋酸钾和由此产生的悬浮加热回流。

It is shown that the sphere-like body-centered cubic Eu2O3 and monoclinic Sm2O3 nanoparticles obtained with sodium dodecylsulfate as surfactant and the rod-like orthorhombic Eu2O3 and body-centered cubic Sm2O3 nanoparticles fabricated with polyvinylpyrrolidone as surfactant possessed a BET surface area of 44~49 and 34~37m^2/g, respectively.

结果表明，以十二烷基硫酸钠作表面活性剂所得产物为类球状体心立方晶相Eu2O3和单斜晶相Sm2O3纳米粒子，比表面积为44~49 平方公尺/g；而以聚乙烯吡咯烷酮作表面活性剂所得产物则是棒状正交晶相Eu2O3和体心立方晶相Sm2O3纳米粒子，比表面积为3437 平方公尺/g。

Inspired by Burnside's theorem and the above other two propositions, we consider the question: whether the structure of a finite group G is restricted provided that the number of character zeros in its character table is"small"?

受Burnside定理及上述两命题的启发，我们考虑这样的问题：当G的特征标表中出现的零点个数&很少&时，是否G的群论结构有很大限制？

Under the optimum concentration of 1.5% glycerol in fermentation medium and feeding of 1% glycerol as precursor after 60 h of incubation, the titer of 2,668 μg/ml was obtained in shake flask culture, an increase of 7.4 times compared with the original strain.

以XC-5-48菌株为试验菌株，当培养基中甘油初始浓度为1.5%，并且在发酵60h时补加1.0%的甘油，摇瓶发酵的效价可达2668μg/ml，较出发菌株(318μg/ml)提高了7.4倍。

Nevertheless, through the widespread attraction of Wii-interacting games, lots of 3C electronic products have applied G-sensor which uses the shifting energy from the movements of X、Y and Z axels to produce signal outputs.

然而在WII的互动游戏带动下，让很多的3C产品慢慢的使用到G-sensor感测器，G-Sensor是利用X、Y、Z轴移动时将变化量转成讯号输出。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。