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the yield up to
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     Experimental results indicated that the optimum conditions of esterificationreaction are as follows: the mole ratio of oleic acid, n-butyl alcohol and p-toluene sulfonic acid 1∶2∶0.15, the reaction time 70 minand the yield up to 93.92%.
     实验结果表明,酯化反应的优化条件为油酸、正丁醇、对甲苯磺酸摩尔比为1:2:0.15,反应时间70min,产率可达93.92%。
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     The factors of influencing reaction were investigated. Experimental results indicated that the optimum conditions of esterification reaction are:the molar ratio of acetic acid and p-cresol and p-toluene sulphonic acid supported on active carbon is 1∶2∶0.064,the reaction temperature is 130~150 ℃,the reaction time is 30min,and the yield up to 95.87%.
     考察了影响反应的因素,实验结果表明酯化反应的最佳条件:乙酸、对甲苯酚、活性碳负载对甲苯磺酸的摩尔比为1∶2∶0.064,反应温度在130~150℃,反应时间30 m in,产率可达95.87%。
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     Experimental results indicated that the optimum conditions of esterification reaction are the molar ratio of o-phthalic acid, n-butyl alcohol and sodium hydrogen sulfate 1:2. 6:0. 22, the reaction time 1. 5 h,and the yield up to 94.24%.
     实验结果表明:酯化反应的优化条件为邻苯二甲酸、正丁醇、硫酸氢钠物质的量比为1:2.6:0.22,反应时间1.5h。 产率可达94.24%。
短句来源
     The factors influencing reaction were discussed. The results indicated the optimum conditions of esterification reaction are the molar ratio of hexanoic acid isopentanol and phsphotungstic acid pure 1:3:0.00024,the reaction time 40min,and the yield up to 98.92%.
     考察了影响反应的因素,实验结果表明酯化反应的最佳条件:己酸、异戊醇、磷钨酸的摩尔比为1∶3∶0.00024,反应时间40min. 产率可达98.92%.
短句来源
     The factors of influencing reaction were investigated. Experimental results indicated that the optimum conditions of esterification reaction are the molar ratio of hexanoic acid isopentanol and p-tolueue sulphonic acid 1:3:0.074,the reaction timel 15min,and the yield up to 98.92%.
     考察了影响反应的因素 ,实验结果表明酯化反应的最佳条件 :己酸、异戊醇、对甲苯磺酸的摩尔比为 1:3:0 0. 74 ,反应时间 15~2 0min。 产率可达 98 .92 %。
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  “the yield up to”译为未确定词的双语例句
     The optimal conditions obtained by the orthogonal design experiment for the esterification reaction with the yield up to 62% is that reaction time 55 min,reaction temperature 70℃,catalyst amount 110 g/L and reactants molar ratio of ethanol to acetic acid 1.5∶1.
     通过正交实验得到优化反应条件:反应时间为55 min,反应温度为70℃,催化剂用量为110 g/L,醇与酸摩尔比为1.5∶1,乙酸乙酯收率可达62%。
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     The optimal conditions was obtained by orthogonal experiment as follows: n(NaNO 2)∶n(6-APA)=2∶1, m(PEG-400)∶m(6-APA)=0.08∶1, n(Br 2)∶n(6-APA)=2.0∶1, reaction temperature 8~12 ℃, reaction time 4 h with the yield up to 95% and purity 97%.
     通过正交实验得到最佳反应条件为 :n(NaNO2 )∶n(6 APA) =2∶1; m(PEG 4 0 0 )∶m(6 APA) =0 .0 8∶1;
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     This compound efficiently catalyzed the direct asymmetric aldol reaction with the yield up to 90.0% and enanti- omeric excess up to 89.5%.
     该化合物对映选择性催化直接羟醛反应,产率最高达到90.0%,对映体过量最高达89.5%.
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     Results indicated that the purity is 94.67% with the yield up to 68%.
     由高效液相法测得纯度为94.67%,收率达到68%。
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     The results showed that regressionequation could anticipate the yield up to 4.1%~4.6% at 27MPa, 35℃ by the figure of response surface.
     结果表明:回归方程能较好预测萃取得率; 通过响应曲面分析预测在27MPa,35℃条件下,紫草萘醌得率为4.1%~4.6%。
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     Its yield is higher by c.
     使用C.
短句来源
     and the yield raised.
     并有一定的防虫增产效果。
     10 yield.
     结果表明,复合肥不同施用量对油研10号的产量产生显著影响。
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     The yield is 65%.
     产品收率为65%。
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     It is the main factor of it' s yield.
     主要结论如下:
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  the yield up to
Shoot excision every week from week three improved the yield up to 7 shoots per explant.
      
The main products of the reaction are α, ω-dicarboxylic acids obtained with the yield up to 77% depending on the size of acetals ring.
      
Plastic behavior beyond the yield up to failure 4.1 Prebuckling behavior In this region, the lateral load is increased until the buckling of plate.
      


Two new azoxybisbenzocrown ethers were synthesized. Preparative method of azo-xybisbenzo-15-crown-5 has been improved with the yield up to 65.3%. It was obser-ved that the degree of dissociation of electron-transfer agent plays an important rolein product yield. The results were interpreted in terms of solvent polarity.Photo-andthermo-isomerization of azoxybisbenzocrown ethers have been studied preliminarily.

合成了两种新的氧化偶氮双苯并冠醚,改进了氧化偶氮双苯并15-冠-5的制备方法,使其收率提高到65.3%。工作中观察到,电子转移剂的离解程度对产物收率起重要作用,井以溶剂的极性给予解释。对这类双冠醚的光和热异构化做了初步探讨。

The extraction and isolation of Midecarnycin experiments have been carried out with macroreticular resin adsorbent CAD-45. The yield up to 84.8% was achieved with our procedure. It was found that factors such as flow rate, pH of elution and eluant would affect the extraction efficiency.The experiment showed that the pH value was maintained at 8.3- 8.5; flow rate 1 / 6 ml/min; before eluation. The column was washed with 1% NH4OH 1 : 1 (V/V); an optimal eluate solvent was found to be butylacetate to obtain...

The extraction and isolation of Midecarnycin experiments have been carried out with macroreticular resin adsorbent CAD-45. The yield up to 84.8% was achieved with our procedure. It was found that factors such as flow rate, pH of elution and eluant would affect the extraction efficiency.The experiment showed that the pH value was maintained at 8.3- 8.5; flow rate 1 / 6 ml/min; before eluation. The column was washed with 1% NH4OH 1 : 1 (V/V); an optimal eluate solvent was found to be butylacetate to obtain satisfactory results. An isolation technique of Midecamycin was thus established.

用国产非离子型大孔网状树脂CAD—45吸附提取麦迪霉素,取代了传统的溶媒萃取法。试验确定了提取工艺条件:吸附最佳pH为8.38~8.5,流速为1/6ml/min;解吸前先用1%氨水1:1(V/V)洗柱;最佳解吸剂为醋酸丁酯,流速为1/12 ml/min。收率可达84.8%。

The alfalfa pastures in the low land of heilonggang region has developed adout 1 million mus in acreage. The traditirational cultivation methods in this district are prevented seeding or seeding on the stubbles. Those methods always cause slow growing, less roots developing, small community, short vegetation and a poor yield in alfalfa pastures. Generally, the yield of biennial alflafa pastures is about 250kg/mu. Adopting changed seeding model, which inclues a series of agronomy practices such as plouthing and...

The alfalfa pastures in the low land of heilonggang region has developed adout 1 million mus in acreage. The traditirational cultivation methods in this district are prevented seeding or seeding on the stubbles. Those methods always cause slow growing, less roots developing, small community, short vegetation and a poor yield in alfalfa pastures. Generally, the yield of biennial alflafa pastures is about 250kg/mu. Adopting changed seeding model, which inclues a series of agronomy practices such as plouthing and levelling the fields, etc can improve the early stage developmant, promote the community forming of the alfalfa and increase the yield up to more than 600kg/mu. with reasonable irrigation and fertilization, on the above, basis the yieds of alfalfa may reach 1000~1200kg/mu. increased by 140~380%. Doing these, the alfalfa pastures may enter into the pumper period three years earlier than that of the traditional methods. The technology for early-maturing high yield alfalfa is easy to handling and adopting. If it can be applied to a large scale in alfalfa planting, the significant ccological and economical efficency will be realized.

黑龙港低平原区的人工苜蓿草地,在传统种植方式和不加管理的条件下往往早期生长缓慢,群体小、产量低,二年生苜蓿地通常亩产只有250公斤;采用早期丰产技术并辅之以合理灌溉、施肥等农艺措施后,可促进苜蓿早期发育,缩短建群阶段,亩产量可提高到1000~1200公斤,增产140~380%,并使苜蓿提早三年进入产量盛期。

 
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