查询词典 optimum conditions

The optimum reaction conditions were: at present of acetic anhydride, a stoichiometric quantity of nitric acid, at room temperature for 40 minutes. Nitration of chlorobenzene gave a,50% yield of mononitro compounds, and an ortho-para isomer ratio 0.20 in product distribution of chlorobenzene mononitration.

结果表明：硅钨酸催化性能较好，催化剂载体以纳米二氧化硅最好，反应条件中醋酸酐用量是主要影响因素；SiW_(12)O_(40)~(4-)／纳米SiO_2催化剂具有强对位选择性：在醋酸酐存在下，氯苯与等当量的硝酸室温下反应40分钟，氯苯一硝化产物中邻／对硝基氯苯异构体的质量比达0.2，产率可达50％。

The optimum fermentation culture and fermentation conditions of exopolysaccharides produced by Morchella esculenta were obtained.

对泰山羊肚菌产胞外多糖(exopolysaccharides，EPS)的液体培养基组成和发酵条件进行了优化，最适碳源是葡萄糖，最适氮源是NH4NO3 。

The preparation conditions, such as the ration between naphthenic oil and fuming sulfuric acid, reaction time and reaction temperature, were investigated and the optimum results were obtained.

对产物用红外光谱仪进行了结构分析，并确定了反应的最佳工艺条件：环烷基油与发烟浓硫酸的体积比为5：1；最佳反应时间为4 h；最佳反应温度为40℃。

Through the screening of the nitrosobacteria and the denitrobacteria, each strain of nitrosobacteria and denitrobacteria was separated and screened resp. form the marine culture wastewater, named as ZW38 and ZL5, and their optimum culture conditions were studied.

方法］通过亚硝化细菌筛选和反硝化细菌筛选方法，从海水养殖废水中分离筛选出亚硝化细菌和反硝化细菌各1株，命名为ZW38和ZL5，并对其最佳培养条件进行了研究。

The PDLLA with a viscosity average molecular weight beyond 20×10~4 was obtained under the optimum synthesis conditions of the lactide after being recrystallized 4 times as the monomer,the vacuum level of 0.098 MPa,reaction temperature of 150-160 ℃,reaction time of 6-8 h,and using 0.1%-0.18% stannous octoate as catalyst.

实验结果表明，重结晶4次后的丙交酯作为单体，在辛酸亚锡摩尔分数为0.1%—0.18%，真空度0.098 MPa，聚合温度150—160℃下聚合6—8 h可获得粘均相对分子质量Mη大于20×104的聚D，L-丙交酯。

Thus, in order to attain acetal can be used as precursor of its matrix olefine aldehyde, 2-undecental glycol acetal was synthesized, and the corresponding optimum reaction conditions as: 2-undecental 0.2mol, glycol 0.3mol, cyclohexane as solvent, catalysed by vitamin C, the optium reaction time was 6h, its reaction yield could reach over 77.25%.

为了进一步探求效果更理想的前体化合物，本文继续合成了2-十一烯醛乙二醇缩醛，通过单因素优化实验得到最佳反应条件为：环己烷作溶剂，VC作催化剂，用量0.42%，醛醇物质的量之比0.2：0.3，反应时间6h，此条件下产品收率达77.25%。

Our results showed that the parthenogenetic activation of mouse oocytes was affected by many factors, so the selection of optimum activated conditions was very important for the effect of activation.

实验表明，卵母细胞的孤雌激活受多种因素的影响，选择最佳的激活条件对孤雌激活效果尤为重要。

The experimental results show that the optimum preparation conditions of catalyst of SO42-/Zr-CLC are achieved :pillaring material is 0.5mol/l ZrOCb,Zr/clay is 3mmol/g,accelerant is (NH4)2SO4 and the quantity of SO42- is 30%, the precursor of Zr-CLC is dipped by SO42- and is calcinated at temperature of 500 癈 for 2h.

将聚合羟基锆阳离子交联剂通过离子交换引入膨润土层间域撑柱膨润土，同时通过浸渍将SO42-引入到膨润土层间的锆阳离子表面，高温焙烧活化，合成了催化性能良好的中孔固体酸催化剂SO42／Zr-CLC，同时对催化剂的性能和结构进行了研究。

In this research, the optimum submerged culture medium and fermentation conditions of exopolysaccharides produced by Pleurotus nebrodensis were obtained.

摘 要：以菌丝体生物量及发酵液中胞外多糖（exopolysaccharides， EPS）含量为指标对白灵菇产胞外多糖的液体培养基组成和发酵条件进行了优化。

The objective of this work was to nd a reliable predictor of optimum fruit quality at harvest based on preharvest climatic conditions.

这项工作的目标是找到一个可靠的预测最佳收获果实品质的基础上在穗的气候条件。

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。