查询词典 A.G.

The thiopeptides, by binding within a cleft located between the ribosomal protein L11 and helices 43 and 44 of the 23S rRNA, overlap with the position of domain V of EF-G, thus explaining how this class of drugs perturbs translation factor binding to the ribosome.

核糖体蛋白L11和23SrRNA的43/44螺旋结构形成裂隙，L11的构象变化能够加宽该裂隙从而允许延伸因子EF-G插入，促使GTP水解，为肽链延伸合成过程中核糖体的构象变化提供能量，而Thio能够与L11和23sRNA结合，阻止L11的构象变化，使该裂隙处于闭合状态，抑制EF－G在延伸过程中的作用。

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 。。。。。。

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？

Methods A routine culture system of melanocytes was established, cells were irradiated with different dosages of UVB(30 and 90mJ/cm2 respectively), and then incubated with different concentrations of TMP for 72h. MTT method, NaOH assay and DOPA oxidization reaction were employed to determine the cell proliferation, melanin synthesis, tyrosinase activity of melanocytes.

常规分离培养正常人黑素细胞，分别用30mJ/cm2、90mJ/cm2的UVB照射细胞，然后加入100μg/ml、300μg/ml、600μg/ml的TMP孵育至72h，采用噻唑蓝法测定细胞增殖情况；多巴氧化法测定酪氨酸酶活性；NaOH裂解法测定黑素含量。

Bobbins of thread in various colors, needles of various sizes, beautiful pieces of cotton print, scissors, rulers…and several cups of coffee sendin g forth a g ood smell, several females are creatin g their own needlework stitch by stitch.

线圈的线程各种颜色，不同大小的针，美丽件花布，剪刀，统治者。。。和派遣提出了咖啡的香味几杯，几个女性创造他们自己的针针线缝。

The industrial process to synthesize 7-ADCA mainly involves a chemical ring expansion of penicillin G to phenylacetyl-7-ADCA, and followed an enzymatic side chain cleavage of phenylacetyl-7-ADCA.

目前工业上生产7-ADCA主要是利用化学法将青霉素G扩环为头孢素G，接著再利用酵素法移去侧链制得7-ADCA。

A good linear relationship between the carbon content and absorbance was in the concentration range from 5 to 120μg/mL cabon.

碳量在5~120μg/mL范围内与吸光度呈良好的线性关系，方法的检出限为2.9μg/mL。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。