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A nematicidal sesquiterpene was isolated from the ethyl acetate extract of Michelia hedyosperma Law according to bioassay-guided fractionation.

根据活性追踪分离，从香子含笑叶的乙酸乙酯提取物中分离纯化到一个杀线虫的倍半萜。

Results Five compounds were isolated and their structures were identified as crenatoside (1),torachrysone(2), emodin(3),emodin-1-O-β-D-glucopyranoside(4) and β-sitosterol(5) respectively.

结果从黄药地上部分的95%乙醇提取物的乙酸乙酯部分中分离得到了5个化合物：黄药苷(1)、torachrysone(2)、大黄素(3)、大黄素-1-O-β-D-葡糖苷(4)和β-谷甾醇(5)。

Results Five compounds were isolated and their structures were identified as crenatoside (1), torachrysone (2), emodin (3), emodin-1-O-β-D-glucopyranoside (4) and β-sitosterol (5) respectiely.

结果 从黄药地上部分的95%乙醇提取物的乙酸乙酯部分中分离得到了5个化合物：黄药苷(1)、torachrysone(2)、大黄素(3)、大黄素－1-O-β-D-葡糖苷(4)和β-谷甾醇(5)。

Solanine was extracted from peel of a potato variety 'Zhong Shu 3' by using microwave and ethanol/acetic acid solvent. Crude extract was further purified and then qualified by HPLC.

应用微波辐射技术，用乙醇—乙酸双溶剂法从中薯3号马铃薯薯皮中提取了马铃薯植株和块茎中的生物碱龙葵素，对所得初提物进行了纯化，并应用HPLC技术对提取的龙葵素进行了定量分析。

In our previous study, we found that the EtOAc extract of the roots contained many oligostilbenes which had multi-faceted bioactivities. Kobophenol A (1) is a stilbene tetramer, accounts for nearly 20% of the EtOAc extract.

我们研究发现金雀根乙醇浸膏的乙酸乙酯部位主要化学成分是二苯乙烯类化合物，具有多样的生物活性。

The yield of borneol and isoborneol was 52.93%,and selectivity for borneol was 60.46%at the conditions of programmed temperatures,reaction time 315 min,saponification time 1h,mass part of catalyst 5%,and terpineol:chloroacetic acid 100∶25.

酯化反应采用程序升温，时间315 min，皂化时间1 h。催化剂用量为松节油质量的5%，松节油∶氯乙酸为100∶25时，龙脑得率为52.93%，正龙脑的选择性为60.46%。

The yield of borneol and isoborneol was 52.93%,and selectivity for borneol was 60.46%at the conditions of programmed temperatures,reaction time 315 min,saponification time 1h,mass part of catalyst 5%,and terpineol:chloroacetic aci...

酯化反应采用程序升温，时间315 min，皂化时间1 h。催化剂用量为松节油质量的5%，松节油∶氯乙酸为100∶25时，龙脑得率为52.93%，正龙脑的选择性为60.46%。

Results show that, by using thionyl chloride and N,N-dimethyl formamide as chlorinating reagent and dichloromethane as solvent and taking -15℃ as reaction temperature, Z-iomer crystals with pale white color and stable to temperature can be obtained with an overall yield of 70%.

以2-（2-氨基噻唑－4-基）－2-甲氧亚氨基乙酸为原料，经盐酸化、氯代等反应合成了Z-2-（2-氨基噻唑－4-基）－2-甲氧亚氨基乙酰氯盐酸盐；氯代时以用亚硫酰氯和N，N-二甲基甲酰胺的混合物代替五氯化磷作氯化剂，并考察了温度和溶剂对氯代产物中Z-异构体和E-异构体收率的影响。

With glycerol triacetate and emulsion of soyabean oil as a substrate, by determining the current responded from the microbial electrode to the substrate, the esterase and lipase activity could be determined.

以三乙酸三甘油酯及豆油乳液作为底物，通过测定微生物电极对底物的响应电流来测定微生物体内酯酶及脂肪酶的活性。

Resin transfer molding mould was manufactured with bisphenol-A epoxide vinylester resin as matrix,poly as low shrinkage additive and glass fiber tricot as reinforcing material,according to the basic requirement of matrix resin of RTM mould.

根据树脂传递模塑模具对基体树脂的基本要求，选用双酚A环氧乙烯基酯树脂为基体，聚乙酸乙烯酯为低收缩添加剂，玻璃纤维经编织物为增强材料，并加入相应的助剂，制备了复合材料RTM模具。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。