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Isopropyl ether is an important intermediate for composing organism andindustrial solvent. It is widely used in medicine, baccy, chemical industrialcombination, environment protection and so on.

异丙醚，又称二异丙基醚、异丙基醚，是一种重要的有机原料和工业溶剂，广泛地应用于医药、烟草、化工合成、环保等领域。

Suitable water-immiscible organic solvents include aromatic hydrocarbons, eg toluene, xylene, naphthalene, tetrahydronaphthalene and methyl naphthalene; chlorinated aromatic hydrocarbons, eg chlorobenzene, fluorobenzene, chloronaphthalene and bromonaphthalene; esters, eg butyl acetate, ethyl acetate, methyl benzoate, ethyl benzoate, benzyl benzoate, butyl benzoate, phenylethyl acetate, butyl lactate, benzyl lactate, diethyleneglycol dipropionate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, di(2-ethylhexyl) phthalate; alcohols having six or more carbon atoms, eg hexanol, octanol, benzyl alcohol, phenyl ethanol, phenoxy ethanol, phenoxy propanol and phenoxy butanol; ethers having at least 5 carbon atoms, preferably C 5-14 ethers, eg anisole and phenetol; nitrocellulose, cellulose ether, cellulose acetate; low odour petroleum distillates; turpentine; white spirits; naphtha; isopropylbiphenyl; terpene; vegetable oil; mineral oil; essential oil; and natural oil; and mixtures of any two or more thereof.

适用于水互溶的有机溶剂包括芳香族碳氢化合物，如甲苯，二甲苯，萘，四氢萘和甲基萘；氯代芳香族碳氢化合物，如氯苯，氟，氯萘和萘；酯类，如醋酸丁酯，醋酸乙酯，苯甲酸甲酯，苯甲酸乙酯，苄酯，苯甲酸正丁酯，苯，醋酸丁酯乳酸，乳酸苄，二甘醇二丙酸酯，邻苯二甲酸二甲酯，邻苯二甲酸二乙酯，邻苯二甲酸二丁酯，二（2乙基己基）酯；醇有6个或更多碳原子，如己醇，辛醇，苯甲醇，苯乙醇，苯氧基乙醇，丙醇和苯氧基苯氧丁醇；醚至少有5个碳原子，最好荤5-14醚，如苯甲醚和phenetol；硝化棉，纤维素醚，醋酸纤维素，低气味石油蒸馏；松节油；白酒，石脑油isopropylbiphenyl；萜类，植物油，矿物油，挥发油；和天然油，以及任何两个或两个以上其混合物。

In order to explore the relationship between structure and properties of hydroxyalkyl cellulose ether nitrate, molecular structures of nitrate ester of hydroxylethyl cellulose ether, nitrate ester of hydroxylpropyl cellulose and nitrate ester of cellulose glycerol ether with molar substitution of 1 were simulated by using Synthia module of Materials Studio, and their performances of nitrogen content, glass transition temperature and Young's modulus were predicted.

为探索羟烷基纤维素醚硝酸酯的结构与性能关系，借助Materials Studio软件中的Synthia模块模拟了摩尔取代度为1的羟乙基纤维素醚硝酸酯、羟丙基纤维素醚硝酸酯和二羟丙氧纤维素醚硝酸酯的结构，并预测了它们的含氮量、玻璃化转变温度和杨氏模量。

The present invention relates to the depolymering cyclization reaction of aromatic dithio ether polymer to prepare aromatic cyclic dithio ether compound under the presence of mercapto group containing compound and alkali matter.

本发明涉及利用芳香双硫醚聚合物的解聚成环反应来制备芳香双硫醚环状化合物的方法。该方法采用芳香双硫醚聚合物在含巯基的化合物和碱性物质存在的条件下发生解聚成环反应生成双硫醚环状化合物。

In the presence of NaH and in DMF, the acyclic crown ethers 1a and 1b were synthesized by the reaction of di-or triethyleneglycol ditosylate and o-methoxymethoxybenzyl alcohol, which was obtained from salicylaldehyde via the protection of the hydroxyl group with chloromethyl methyl ether followed by the reduction of the formyl group with NaBH4. The hydrolysis of 1a and 1b with dilute hydrochloric acid provided the diphenolic type acyclic crown ethers 2a and 2b respectively in good yield.

将水杨醛与碱和氯甲基甲基醚反应，再经过NaBH4还原，即制得邻苯甲醇，然后将其在DMF中与NaH和二甘醇二对甲苯磺酸酯反应，得开链冠醚1a和1b.1a和1b经稀酸水解，即脱保护而分别生成新的酚型开链冠醚2a和2b。

Is now an annual production capacity of calcium chloride, bromide, DecaBDE, DBDPE three bromine phenol, Tetrabromobisphenol A, octabromodiphenyl ether, benzyl bromide, diphenyl ether, dibenzo ethane and other chemicals, 5,000 tons of bromine, hydrogen bromide by-product 5000 tons, the product export to Europe and Southeast Asia market, the company owns self import and export rights, and have passed the ISO9001: 2000 certification, is the most full-bromine chemical species, product quality, one of the best high-tech enterprises.

现已形成年产氯化钙，溴素，十溴二苯醚、十溴二苯乙烷、三溴苯酚、四溴双酚A、八溴醚、溴化苄、二苯醚，二苯乙烷等各类溴化学品5000吨，副产溴化氢5000吨，产品出口欧洲和东南亚市场，公司拥有自营进出口权，并已通过ISO9001：2000认证，是国内溴化学品种最全、产品质量最好的高新技术企业之一。

The coordination effect between lariat crown ether and lariat azacrown ether with alkali metal ions has been analyzed and compared according to the obtained parameters.

运用得到的量子化学计算参数，如前线轨道HOMO能级，LUMO能级等，对碳基臂式冠醚与氮基臂式冠醚与碱金属离子的配位能力进行了比较和分析，结果表明氮基臂式冠醚分子B对碱金属的配位能力要大于碳基臂式冠醚分子A。

It is speculated that this components feedback adjusting the this receptor\'s expression through receptor-binding with 5-HT3A receptor.3.3 Effection of Iridoids composition of Valeriana jatamansi Jones on THP1 mRNA expression of IBS rats induced by chronic stressMethods:Animals were randomly divided into 6 groups:normal group,model group, OSD group,FXT group,MSP group and Iridoids composition of Valeriana jatamansi Jones groups.

表明蜘蛛香环烯醚萜不影响色氨酸羟化酶的转录表达。3.1.3蜘蛛香环烯醚萜对5-HT受体的影响目的：探讨蜘蛛香环烯醚萜对慢性应激所致IBS大鼠5-HT3受体mRNA表达的影响方法：动物随机分为对照组、模型组、昂丹司琼组、氟西汀组、蜘蛛香环烯醚萜24.92mg/kg、12.46mg/kg、6.23mg/kg组，除对照组外，其余各组进行慢性应激实验。

It is speculated that this components feedback adjusting the this receptor\'s expression through receptor-binding with 5-HT3A receptor.3.3 Effection of Iridoids composition of Valeriana jatamansi Jones on THP1 mRNA expression of IBS rats induced by chronic stressMethods:Animals were randomly divided into 6 groups:normal group,model group, OSD group,FXT group,MSP group and Iridoids composition of Valeriana jatamansi Jones groups.

表明蜘蛛香环烯醚萜不影响色氨酸羟化酶的转录表达。3.1.3蜘蛛香环烯醚萜对5-HT受体的影响目的：探讨蜘蛛香环烯醚萜对(来源：ABC论文aaaaaa网www.abclunwen.com)慢性应激所致IBS大鼠5-HT3受体mRNA表达的影响方法：动物随机分为对照组、模型组、昂丹司琼组、氟西汀组、蜘蛛香环烯醚萜24.92mg/kg、12.46mg/kg、6.23mg/kg组，除对照组外，其余各组进行慢性应激实验。

It shows that Iridoids composition of Valeriana jatamansi Jones have inhibit function on gastrointestinal function of normal mice.1.2 Effection of Iridoids composition of Valeriana jatamansi Jones on gastrointestinal function of mice with reserpineMethods:Compared with normal group,model group and YJBH group,mice with reserpine which has given Iridoids composition of Valeriana jatamansi Jones as 71.2mg/kg,35.6mg/kg,17.8mg/kg,8.9mg/kg was detected gastric emptying and small intestinal propulsion after 6 days drug given.

结果：蜘蛛香环烯醚萜35.6mg/kg、17.8mg/kg组能减缓胃排空和小肠推作用(P.05)，说明蜘蛛香环烯醚萜对正常小鼠胃肠功能有一定的抑制作用。1.2蜘蛛香环烯醚萜对利血平化小鼠胃肠功能的作用方法：小鼠每日腹腔注射利血平造模，同时灌胃给予蜘蛛香环烯醚萜71.2mg/kg、35.6mg/kg、17.8mg/kg、8.9mg/kg与空白组、模型组和越鞠保和丸组对照，给药6日后测定动物的胃排空率和小肠推进率。

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。