乙烯

It is characterized in that: 2-( 5-(dimethylamino methyl- 2- furyl methyl sulpho ethylamine reacts with 1- methylthio - 1- methylamino- 2- nitro ethylene directly in water phase, crystallizing and separating out ranitidine alkali.

其特征在于：它是由2-(5-(二甲氨基甲基-2-呋喃基甲基硫代乙胺与1-甲硫基-1-甲胺基-2-硝基乙烯直接在水相中反应并结晶析出雷尼替丁碱。

Radiation-induced grafting of binary vinyl monomers of styrene/maleic anhydride, St/dimethylamino ethyl methacrylate and St/vinyl acetate onto cotton cellulose was carried out by γ-radiation from a 60Co source at room temperature under nitrogen.

在氮气气氛下用γ射线辐照的方法在棉纤维上接枝苯乙烯/马来酸酐、苯乙烯/甲基丙烯酸二甲胺乙酯、苯乙烯/醋酸乙烯酯二元单体。

The polymerization reacts from the inverse emulsion . Selecting white oil as continuous medium , Span60 and TX-10 as the complex emulsifier , AM-01﹑(NH4)2S2O4 and NaHSO3 as new-type complex initiator , the copolymerization of dimethylamino ethyl acrylate methyl chloride/acrylamide was developed . The effects of the concentration of monomer﹑emulsifier and initiator﹑ temperature﹑reaction time and pH on the molecular weight﹑intrinsic viscostity﹑conversion ratio and cation degree of copolymer were studied .

以反相乳液为初始聚合体系，油酸失水山梨醇酯Span60和辛基酚聚氧乙烯醚TX-10构成复配乳化剂，白油为连续介质，AM-01、过硫酸铵和亚硫酸氢钠组成新型复合引发体系，进行丙烯酰胺/（2-甲基丙烯酰氧乙基）三甲基氯化铵的反相准微乳液共聚合，研究了单体浓度、乳化剂、反应温度、反应时间、pH等因素对聚合产品分子量、特性粘数、转化率及阳离子度的影响。

Radiation-induced grafting of binary vinyl monomers of styrene/maleic anhydride, St/dimethylamino ethyl methacrylate and St/vinyl acetate onto cotton cellulose was carried out by γ-radiation from a 60Co source at room temperature under nitrogen.

闫宇，伊敏，彭金粉，翟茂林*，哈鸿飞摘要：在氮气气氛下用γ射线辐照的方法在棉纤维上接枝苯乙烯/马来酸酐、苯乙烯/甲基丙烯酸二甲胺乙酯、苯乙烯/醋酸乙烯酯二元单体。

A method for the preparation of microcellular elastomeric polyurethane foams from a reaction mixture comprising a polyisocyanate component containing at least 85% by weight of 4,4'-diphenylmethane diisocyanate or a variant thereof, a polyol composition comprising at least one polyoxyalkylene polyol having an average nominal hydroxyl functionality of from 2 to 6, an average hydroxyl equivalent weight of at least 1300 and an average oxyethylene content of between 50 and 85% by weight, water, a chain extender having an average hydroxyl equivalent weight of from 15 to 250 and optionally a crosslinking agent, the hardblock-content being more than 45% by weight.

本发明是有关一种制备微孔弹性聚氨基甲酸酯泡沫体的方法，其反应混合物包括：一种含至少85重量％的4，4′－二苯甲烷二异氰酸酯或其变体的聚异氰酸酯组分，一种多元醇组合物，其包含至少一种平均标称羟基官能度从2至6、平均羟基当量至少1300且平均氧乙烯含量介于50至85重量％之间的聚氧亚烷基多元醇，水，一种平均羟基当量为15至250之增链剂，以及视需要使用的交联剂，该硬性嵌段－含量（hardblock-content）大于45重量％。

The experiment that aPplication of Put shows that Put can inhibit chlorophyll discomposing and lower POD activity; Lower concentration (about 5mmol/L) can decrease respiration rate; ethylene's synthesis result in prolonging the storage time; Higher concentration (about l0,20mmol/L) Put can activate the respiration in some degree and disadvantage to storage.

外源腐胺处理香蕉果实的实验表明，腐胺可以减缓叶绿素的降解，另外，低浓度的（5mmol/L左右）腐胺可以较好的抑制乙烯的生成和呼吸作用，延缓果实衰老，而高浓度（10、20mmol/L）则在一定程度上刺激了呼吸作用，对贮藏不利。

This dissertation is mainly focused on the reactivity of methylenecyclopropanes and comprises six parts. 1 The reactions of methylenecyclopropanes with phenylsulfenyl chloride, phenylselenyl chloride and diphenyl diselenide; 2 The coupling reactions of the ring-opening products derivated from methylenecyclopropanes; 3 The palladium-catalyzed ring-enlargement of mono-aryl group substituted methylenecyclopropanes to cyclobutenes. 4 The gold-catalyzed domino ring-opening and ring-closing hydroamination of methylenecyclopropanes with sulfonamides; 5 The Lewis acid-catalyzed reactions of mono-aryl group substituted methylenecyclopropanes with diethyl ketomalonate in the presence of water; 6 The iodobenzene diacetate mediated novel 1,3-dipolar cycloaddition of methylenecyclopropanes, vinylidenecyclopropanes, and methylenecyclobutane with phthalhydrazine.

本论文主要研究了亚甲基环丙烷类化合物的一些化学反应性能，共由以下六部分组成：1、亚甲基环丙烷类化合物与苯硫氯、苯硒氯及二苯基二硒的反应；2、亚甲基环丙烷类化合物开环产物的偶联反应；3、单芳基取代的亚甲基环丙烷类化合物在钯催化剂作用下的扩环反应；4、金化合物催化磺酰胺对亚甲基环丙烷类化合物的串联开环关环氨氢化反应；5、路易斯酸催化亚甲基环丙烷类化合物与丙酮二羧酸二乙酯在有水存在下的反应；6、醋酸碘苯促进的亚甲基环丙烷类化合物、亚乙烯基环丙烷类化合物及亚甲基环丁烷类化合物与邻苯二甲酰肼的新型1，3-偶极环加成反应。

The results show that the best addition of OP-10 is 0.10% and it can effectively stabilize the dispersity of the nano-iron/ethanol sol.

结果表明，加入0.10的十二烷醇聚氧乙烯醚对纳米铁颗粒的分散起到很好的稳定作用。

A kind of modified casting polyurethane by styrene and divinyl benzene with good adhesion with ethylene-propylene-diene monomerhas been prepared by one-step process, which can be cured at the room temperature.

采用苯乙烯、二乙烯基苯对聚氨酯进行了改性研究，利用一步法工艺，制备了与三元乙丙橡胶具有优良粘接性能的双组分室温固化的改性浇注胶。

The light filtrating properties were studied through the filling of 3D continuous pores with divinyl benzene as a highly refractive liquid.

研究了三维连续孔道在充满二乙烯基苯高折射液体后的滤光特性，通过引入金属离子改变固体材料折射率的方法，验证了光在高折射液相中的全反射效应，并从定性角度建立三维骨架材料的孔径及分布与透射光波长范围之间的关系，对新光学现象给出了初步解释。

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。