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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。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。