The air drying property of unsaturated polyester resin prepared from dipropylene glycol monoallyl ether was studied.
研究了由二丙二醇单烯丙基醚制得的不饱和聚酯树脂的风干性能。
从列表中选择 "ether"。
Advances in the carbonylation synthesis of dimethyl carbonate (DMC) from methanol or dimethyl ether with carbon monoxide or carbon dioxide were summarized.
简述了分别以一氧化碳、二氧化碳与甲醇、二甲醚等进行羰基化反应合成碳酸二甲酯(DMC)的研究进展。
Through using network connecting mode of ether star structure, the distribubuted control system has been changed from busbar network topologic structure into a star network topologic structure.
通过采用以太网星形结构的网络连接方式，将分散控制系统由总线形网络拓朴结构改为星形网络拓扑结构。
Based on the principle of ester hydrolyzation to ether in alkali condition, the process for preparation of dimethyl sulfide from sodium methyl sulfate residue was investigated.
根据酯在碱性条件下水解反应生成醚的原理，研究了以甲基硫酸钠废渣为原料制备二甲基硫醚的方法。
Overview: The Division clouds extract of tobacco from Yunnan mainly as raw materials extracted by petroleum ether extract obtained in Yunnan tobacco.
概述：本司云烟浸膏主要采用云南产的烟叶为原材料，通过石油醚浸提云南地区烟叶制得浸膏。
The results show that it is inefficient to use diisopropyl ether as extractant to extract hydroquinone from water isothermally.
结论是：等温下用二异丙基醚萃取水中对苯二酚并不很有效。
Some emphases on further research are indicated, such as the mechanism of removing amine and ether from malodorous gas and the optimisation of extracting process.
指出对恶臭气体中的胺类和醚类除臭机理、对植物提取液提取工艺优化的研究是今后研究的重点。
The constituents from pickle brine extracted with ethyl ether and identified by GC MS. In the result, 8 acids, 4 alcohol, 2 nitriles, 2benzines and 1 ester were identified.
首先，对雪里蕻腌菜卤汁的乙醚萃取浓缩液组分进行了鉴定，结果发现有机酸组分8个，醇类组分4个，腈类组分2个，酯类组分1个，芳香烃2个。
Methods the extracted liquid with petroleum ether from the geochemical samples in the north of Shaanxi was spectrally analyzed by using the optimized measurement condition.
方法用优化后的条件对陕北地区化探样品中芳烃的石油醚萃取液进行了光谱分析。
The ethanol extract from the twig bark powder of Periploca sepium was suspended in water and successively treated with petroleum ether, ethyl acetate and n-butanol.
将杠柳枝皮粉末的乙醇提取物悬浮于水后，依次用石油醚、乙酸乙酯和正丁醇萃取。
The quaternary ammonium salts of liensinine differ from d-tubocurarine by one less ether linkage in chemical structure.
莲心碱的季铵盐与箭毒块茎碱的化学结构不同，缺少一个氧醚键。
From the 35% EtoAc-petroleum ether portion 1-0-hexanoyl-glycerol ester(12) were isolated.
从35％乙酸乙酯—石油醚部分分离得到了十六碳酸甘油酯（12）。
Besed on the extract with 80% acidities alcohol, separation by silica gel, precipitation by ether, oxysophocarpine was obtained from Sophora flavescens.
采用80%的酸性乙醇提取、硅胶柱层析分离、乙醚分级沉淀、丙酮重结晶的工艺方法，从苦参中分离得到氧化槐果碱单体。
Results To determine the Oridonin extracted from diethyl ether of plasma by RP-HPLC method, the retention time was stable, the linear curve fitted well, and the results were accurate and reliable.
结果RP - HPLC法测定乙醚萃取的血浆中冬凌草甲素保留时间稳定，标准曲线线性良好，结果准确、可靠。
The extractive components from soybean meal by ether or ethanol all contained repellent substances poisonous to silkworm in the ether-soluble component of soybean meal.
大豆粉的醚溶性成分及乙醇提取物中均含有抑制桑蚕摄食的忌避因子，酸溶性成分中还存在对蚕有毒性的物质。
Method the extracts of petroleum ether, ether, ethyl acetate, ethanol and hot water from the whole plant were used to determine the in vitro miti-oxidant and antibacterial activity.
方法对楮头红的石油醚、乙醚、乙酸乙酯、乙醇和热水的粗提取物分别进行体外抗氧化和抑菌试验。
MethodsTo obtain chemical constituents from Musa basioo, in this paper the methods of water extraction, ethanol extraction and petroleum ether extraction were used.
方法采用水提取法、醇提取法和石油醚提取法对芭蕉根的化学成分进行定性实验。
To obtain chemical constituents from the fruit of Catalpa ovata G. Don, the methods of water extraction, ethanol extraction and petroleum ether extraction were used.
采用水提取法、醇提取法和石油醚提取法对梓树果实的化学成分进行了比较全面的定性实验。
The invention relates to a catalyst for use in the direct synthesis of dimethyl ether from a synthesis gas, a preparation method and use thereof.
本发明涉及一种用于合成气直接合成二甲醚的催化剂及其制法和应用。
The air drying property of unsaturated polyester resin prepared from dipropylene glycol monoallyl ether was studied, the related influential effects were discussed.
用一缩二丙二醇单烯丙基醚所制备的不饱和聚酯树脂的气干性能，并对有关影响因素作了研究。
The yield of petroleum ether extractives from the crowns of C. lanceolata was 5 4% of its dry weight.
杉木绿冠的石油醚提取物得率，为其绝干重量的5．4％。
Compared with petroleum ether extraction method, the extraction rate from SFE -co2 is higher and extraction time shorter.
并与传统的石油醚萃取法相比较，其萃取时间短，得油率高。
The crude glucuronides of the various alcohols were isolated from the urine by extraction with ether or mixtures of ether and ethanol.
各种乙醇的粗葡萄糖醛酸甙从尿中用醚或醚和乙醇混合物提取分离的。
The causes after the poisoning deactivation and thermal deactivation of bifunctional catalysts for direct synthesis of dimethyl ether (DME) from biomass syngas and the countermeasures were reviewed.
概述了生物质气一步法合成二甲醚双功能催化剂的热失活、中毒失活的原因及其解决方案。
When the content of cellulose ether increasing from 0 to 0.6%, water retention rate increased from around 60% to 90% above.
纤维素醚掺量为0.6%时即可使保温砂浆拌合物的保水性从不掺时的60%左右上升至90%以上，保水效果十分明显。
The viscosity of saturated liquid methyl tert-butyl ether(MTBE) was presented over the temperature range from 268.123 to 373.131 K with a calibrated Ubbelohde-type capillary viscometer.
利用改进型的乌别洛特毛细管黏度计，对268.123~373.131K温度区间内的甲基叔丁醚的饱和液相黏度进行了实验研究。
In four extracts from PMEW treated with methyl alcohol and water, petroleum ether, chloroform and ethyl acetate, extract rate of methyl alcohol and water was the highest.
通过对PMEW萃取分离发现，在甲醇水、氯仿、石油醚和乙酸乙酯四种萃取物中仍以甲醇水的萃取率最高。
The fir essential oil was extracted from fir root by steam distillation method, from which cedrol was extracted, and then, cedrol methyl ether was synthesized based on cedrol.
以杉木根为原料通过水蒸气蒸馏法提取杉木精油，从杉木根精油中精制提取柏木脑，再以柏木脑为原料合成甲基柏木醚。
The fir essential oil was extracted from fir root by steam distillation method, from which cedrol was extracted, and then, cedrol methyl ether was synthesized based on cedrol.
以杉木根为原料通过水蒸气蒸馏法提取杉木精油，从杉木根精油中精制提取柏木脑，再以柏木脑为原料合成甲基柏木醚。
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