产下

The yield of product was 56.1% when rare-earth composite solid superacid SO(superscript 2- subscript 4)/ZrO2-CeO2 was used as catalyst at dosage of 3 % of the mass of β-pinene, while mass ratio of borneol to isoborneol in the product reached 46.0:23.2, showing higher borneol selectivity than other catalysts.

当用稀土复合固体超强酸SO(上标 2-下标 4)/ZrO2-CeO2为催化剂，用量3%时，粗龙脑产率为56.1%，但对正龙脑的选择性高于其他催化剂，正、异龙脑比为

A verification experiment was performed and the productivity of levulinic acid was 19.86%, which is almost the same as the model prediction.

通过验证实验，在上述优化条件下乙酰丙酸产率达到了19.86％，与模型预测值19.75％十分吻合，原料中纤维素的利用率达到68.8％。

Using design of L9 (3^4), the extraction conditions of total flavonoids from Lithocarpus polystachyus Rehd. in Huaihua were optimized by ethanol solution extraction assisted with ultrasonic, and the variety trends of total flavonoids content were investigated with different natural storage time, different gathering seasons, differrent Lithocarpus polystachyus Rehd.

以怀化产多穗柯为原料，采取乙醇为溶剂超声波辅助提取，以L9(3^4)正交试验方法优化总黄酮提取工艺，然后在该工艺条件下对自然存放时间不同、采摘季节不同、不同叶的多穗柯原料进行总黄酮含量的动态变化考察。

Ethanol yield could reach 20.52 g/L (74.5 %of theoretical yield) under the following conditions: fermentation temperature at 28 ℃, initial pH value as 5.0, 150 mL liquid loadage in 250 mL rotating flask, and rotating speed at 160 r /min, and 0.5 % corn steep liquor and 0.024 % urea. Tran. by YUE Yang

在28 ℃，初始pH值5.0，160 r/min，250 mL三角瓶装液量150 mL，木糖浓度60 g/L，玉米浆0.5 %，含尿素0.024 %的条件下，休哈塔假丝酵母发酵木糖能产乙醇20.52 g/L，得率达到理论值的74.5 %。

Ethanol yield could reach 20.52g/L (74.5%of theoretical yield) under the following conditions: fermentation temperature at 28 ℃, initial pH value a 5.0, 150mL liquid loadage in 250mL rotating flack, and rotating speed at 160r/min, and 0.5% corn steep liquor and 0.024% urea.

在28℃，初始pH值5.0，160r/min，250mL三角瓶装液量150mL，木糖浓度60g/L，玉米浆0.5%，含尿素0.024%的条件下，休哈塔假丝酵母发酵木糖能产乙醇20.52g/L，得率达到理论值的74.5%。

N-(6-methyl-2-pyridine)-amino-methylene-diethyl malonate was produced by condensation reaction of 2-amino-6-methyl pyridine with ethoxymethylene diethyl malonate under optimal conditions that n(2-amino-6-methyl pyridine)∶n(ethoxymethylene diethyl malonate) is 1∶1.3, reacting time 45 min and temperature 130 ℃,the yield of this reaction was 96%,which was 6% higher than that of literature.

在250℃的反应温度下，分别以二苯醚、石蜡油和邻苯二甲酸二乙酯为热载体进行成环反应，得到4-氧-7-甲基-1，8-萘啶-3-羧酸乙酯的收率分别为88.6%、56.3%和61.2%，确定二苯醚为最佳热载体，并发现反应温度对产率的影响最大，原料配比次之，反应时间基本无影响。

The free-radical addition reaction of malonic ester with a series of alkenes under the uniform conditions has been studied.

在相同反应条件下，进行一系列烯烃与丙二酸二乙酯的加成反应，求得产率与烯烃结构间的定量关系，即反S型曲线。

The optimum conditions for making microspheres were obtained via orthogonal experiment with adsorptive capacity as the index as follows: the mass fraction of water phase is 2%(ratio between starch and β-cyclodextrin is 1:2), 110 mL oil, 3.3 g Span60, 6.6 g Tween60, 15 mL water, 18 mL assistant surfactant, 0.07 g metaphosphoric acid trisodium salt. The microspheres were characterized by microscope and the average particle size is about 329.3 nm with productive rate of 41%.

结果表明，质量分数为2%的可溶性淀粉与β-环糊精溶液为水相（二者的质量比为1：2），油相用量为110 mL，水相用量为15 mL，乳化剂Span60用量为3.3 g，Tween60用量为6.6 g，助乳化剂用量为18 mL，三偏磷酸钠用量为0.07 g，制备得到的复合纳米微球在扫描电子显微镜下，微球大小分布均匀，所得纳米微球产率为41%，平均粒径为329.3 nm。

Raw enzyme was extracted after the bacteria were ultrasonically broken, and its 2-oxoalde-hyde reductase activity was detected by HPLC and UV absorbency spectrum in the presence of NADH and methylglyoxal as a substrate.

破碎该菌细胞后提取粗酶，以甲基乙二醛作反应底物，在还原性辅酶Ⅰ存在条件下，紫外光谱和HPLC的分析表明，该菌能代谢甲基乙二醛；并对其产酶条件进行了研究。

At last, combining with space convergence of surround rock, numerical analysis conclusion and field support measurements, it gives a security and stability appraisal of flat dip layer in Xi Shanping Tunnel; also, some advices are given about the monitorial work and numerical simulation.

本文结合西山坪隧道的修建背景，以施工量测与监控的结果为基础，选择了有代表性断面，对单一巨厚围岩不同产状、穿煤系地层段、上伏及下伏采空回填区段的内空收敛情况进行了对比分析。

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。