醚的

Block heteric polyethers with different molecular weight were synthesized by block polymerization method.

用嵌段聚合的方法合成了杂嵌型聚醚并用于废纸脱墨，研究了产物分子量对脱墨性能的影响。

In this study, bound residues of [C ring-U-14 C] ZJ0273 in three kinds of soil and dynamics distribution in humus fulvic acid, humin and humic acid were studied by using 14C isotope tracer technique.

利用14C同位素示踪技术研究了［C环－U-14C］丙酯草醚(ZJ0273)在3种不同类型好氧土壤中的结合残留及其在富啡酸、胡敏酸和胡敏素中的动态分布。

In this study, bound residues of [C ring-U-14C]ZJ0273 in three kinds of soil and dynamics distribution in humus fulvic acid, humin and humic acid were studied by using 14C isotope tracer techniques.

本文利用14C同位素示踪技术，研究了[C环-U-14C]丙酯草醚(ZJ0273)在3种不同类型好氧土壤中的结合残留及其在富啡酸、胡敏酸和胡敏素中的动态分布。

Among the 8 herbal extracts, petroleum ether extract of Inula britanica L.

根据杀螨活性初筛结果，选取这3种触杀活性较高的中草药提取物进行毒力活性测定结果为：旋覆花石油醚提取物的LCS。

The results showed polymeric diaryliodonium salts were effective aryl ion transfer reagents. Thirdly, a new type polymer supported hypervalent iodine reagents poly { [4-Hydroxy iodo] styrene} has been developed. It was an effective oxidative reagent, and could be applied to the one pot synthesis of 4-arylthiazoles.

然后，我们以聚苯乙烯羟基对甲苯磺酰氧基碘苯为原料，成功制备了一类新型聚合物高碘试剂—聚苯乙烯负载的炔基碘盐，并研究了其作为炔基转移试剂的有效性：(1)该试剂可对硫、氮、硒等负离子进行亲电炔基化反应，合成炔基亚砜、0，0-二烃基二硫代磷酸炔基酯、1-苯乙炔基苯并噻唑以及炔基硒醚。

This algorithm was applied to a typical epoxy polymeric network based on diglycidyl ether bisphenol A and isophorone diamine, obtaining a highly crosslinked infinite network model with the conversion up to 93.7%.

将其应用到异佛尔酮二胺固化双酚A二缩水甘油醚得到的聚合物，产生了一个高度交联无限扩展的聚合物网络模型，其反应转变率达到了93.7%。

Fourteen new pyrethroids containing isoxazole were designed and synthesized from 4-isopropyl-3-substituted phenyl-5-hydroxyl isoxazoles as major material, whose structures were also characterized by IR, 1H NMR and elemental analysis.

以4-异丙基-3-取代苯基-5-羟基异噁唑和3-苯氧基苄基溴为原料，三乙胺为缚酸剂，设计并合成了14个未见报道的4-异丙基-3-取代苯基-5-异噁唑基-(3'-苯氧基)苄基醚。通过红外光谱、核磁共振、元素分析等手段，确证了它们的化学结构。

Our research fixed that Iridoids composition of Valeriana jatamansi Jones was the active ingredient in Valeriana jatamansi Jones treating IBS for the first time.

综上所述，蜘蛛香环烯醚萜可以抑制胃肠功能亢进，降低内脏敏感性，改善精神状态，并具有良好的镇痛作用，从而改善腹泻型IBS的临床症状。

The effect factors of ethyl linolenate separation by silver nitrate adsorption column were studied.

研究了负载型硝酸银吸附柱分离亚麻酸乙酯过程中的影响因素，考察了载体类型、溶剂种类(石油醚、正己烷、超临界CO2)等对亚麻酸乙酯分离效果的影响。

Furthermore,The results show that alumina is more suitable for the separation of ethyl linolenate than the widely used silica gel, and the supercritical fluids is a good solvent than organic solvent because of its adjustability by changing the extraction conditions.

研究结果表明，超临界流体分离效果优于石油醚和正己烷等有机溶剂，氧化铝载体分离效果优于硅胶，超临界流体结合硝酸银吸附柱分离亚麻酸乙酯具有较好的效果，可得到纯度约95%的亚麻酸乙酯，其工业应用前景诱人。

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。