丙烷

The surface action mechanism of sodium polydithio dipropyl sulfonate in acidic Cu plating bath indicates that the surface complex produced by adsorbed sodium polydithio dipropyl sulfonate and Cu + resists copper ions' electrodeposition.

酸性镀铜溶液中表面活性剂聚二硫二丙烷磺酸钠的表面作用机理表现为：吸附态的聚二硫二丙烷磺酸钠与Cu＋形成表面络合物阻化铜离子的电沉积。

It makes an all-round research, analysis and study to it with the extinctive theory, planning demand and systemic conservation of FM-200, including the design for automatic alarm systems and some essential claim for safety decentralization and the economy budget for the whole system.

本文根据深圳高阳万国电脑有限公司通讯楼的具体工程概况，采用全淹没式七氟丙烷（FM-200）灭火系统对其进行保护，同时对目前哈龙灭火系统替代产品的灭火性能、使用场所及对环境与人身安全影响进行了分析，对七氟丙烷（FM-200）气体灭火系统的灭火机理、设计要求以及系统维护进行了全面的调查、分析与研究，包括自动报警系统的设计和一些必要的安全疏散要求以及对系统的经济预算，完成了本文设计。

It makes an all-round research, analysis and study to it with the extinctive theory, planning demand and systemic conservation of FM-200, including the design for automatic alarm systems and some essential claim for safety decentralization and the economy budget for the whole complete the design of this substitution.

本文根据深圳高阳万国电脑有限公司通讯楼的具体工程概况，采用全淹没式七氟丙烷（FM-200）灭火系统对其进行保护，同时对目前哈龙灭火系统替代产品的灭火性能、使用场所及对环境与人身安全影响进行了分析，对七氟丙烷（FM-200）气体灭火系统的灭火机理、设计要求以及系统维护进行了全面的调查、分析与研究，包括自动报警系统的设计和一些必要的安全疏散要求以及对系统的经济预算，完成了本文设计。

2A series of alternating polyamide-imideswith fluorenyl cardo structure was synthesized by "one-pot" polycondensation of cardo diamines,trimellitic anhydride and various aromatic diamines including p-phenylene diamine,m-phenylene diamine, 4,4\'-oxydianiline,3,4\'-oxydianiline,2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2-bis[4-(3-aminophenoxy)phenyl]propane respectively using triphenyl phosphite as condensing agents.

采用&一锅法&(One—pot Synthesis)，由Cardo二胺、偏苯三酸酐和不同二胺包括对苯二胺、间苯二胺、4，4\'—二氨基二苯醚、3，4\'—二氨基二苯醚、2，2—双[4—(4—氨基苯氧基苯基]丙烷和2，2—双[4—(3—氨基苯氧基)苯基]丙烷合成了一系列含有芴基Cardo结构的交替聚酰胺酰亚胺。

2A series of alternating polyamide-imideswith fluorenyl cardo structure was synthesized by "one-pot" polycondensation of cardo diamines,trimellitic anhydride and various aromatic diamines including p-phenylene diamine,m-phenylene diamine, 4,4\'-oxydianiline,3,4\'-oxydianiline,2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2-bis[4-(3-aminophenoxy)phenyl]propane respectively using triphenyl phosphite as condensing agents.

采用&一锅法&O(来源：88AB57C论文网www.abclunwen.comne—pot Synthesis，由Cardo二胺、偏苯三酸酐和不同二胺包括对苯二胺、间苯二胺、4，4\'—二氨基二苯醚、3，4\'—二氨基二苯醚、2，2—双[4—(4—氨基苯氧基苯基]丙烷和2，2—双[4—(3—氨基苯氧基)苯基]丙烷合成了一系列含有芴基Cardo结构的交替聚酰胺酰亚胺。

Influences of several factors on the image quality of the poststack migration are further investigated, including interstation spacing, noise level of the data, velocity model used in migration, and earthquake distribution (incident direction of source fields).

首先，考虑盐的浓度的影响，建立了天然气含有甲烷和丙烷两种组分的水合物形成的相变曲线，即温度和压力关系曲线，同时也建立了甲烷和丙烷两种组分天然气溶解度的加权关系。

Chapter 6: Iodobenzene diacetate-mediated reactions of methylenecyclopropanes, vinylidenecyclopropanes and a methylenecyclobutane with phthalhydrazine give the corresponding [3+2] cycloaddition products in good yields under mild conditions. In these reactions, phthalhydrazine was transformed to a 1,3-dipole intermediate in the presence of iodobenzene diacetate. A plausible reaction mechanism has been proposed.

本论文对亚甲基环丙烷类化合物的一些化学反应性能进行了研究，发现了亚甲基环丙烷类化合物在不同试剂或不同催化剂作用下的一些新的化学转化并合成了一些结构简单但具有潜在应用价值的有机小分子。

Synthesis of organic sulfuric compounds in aqueous media is carried out by: using thio-olefin compounds with carbonyl compounds, acetal/keltone, hydrazone, oxime, osazone and enamine to synthesize mercaptal/keltone compounds in aqueous media; using thio-olefin compounds with alpha-hydroxyaldehyde/keltone or alpha-halogenated aldehyde/keltone to synthesize thia-olefin derivatives in a queous media; using thio-olefin compounds with alpha, beta-unsaturated hydroxy compounds, C-C treble bond, C-N treble bond, C-C double bond, N-N double bond, C-N double bond, C-S double bond, epoxy and its derivatives, aziridine and its derivatives, cyclopropane and its derivatives and halogenated carboxy to synthesize sulfoether compounds in a queous media.

含水介质中有机硫化合物的合成方法，本发明属于有机合成方法，用硫缩烯酮类化合物与羰基化合物、缩醛/酮、腙、肟、脎、烯胺在含水介质中合成缩硫醛/酮化合物，与α-羟基醛/酮或α-卤代醛/酮在含水介质中合成噻烯类衍生物，与α，β-不饱和羰基化合物、碳碳叁键、碳氮叁键、碳碳双键、氮氮双键、碳氮双键、碳硫双键、环氧乙烷及其衍生物、氮杂环丙烷及其衍生物、环丙烷及其衍生物、卤代烃等在含水介质，中合成硫醚化合物。

Influences of reaction temperature, catalyst concentration, molar ratio of methanol to propylene oxide and reaction time on conversion of propylene oxide, yield and selectivity of propylene glycol monomethyl ether were studied.

在反应温度为120～130℃、催化剂用量为0.20%～0.30%、甲醇与环氧丙烷摩尔比为3/1～5/1的反应条件下，环氧丙烷的转化率在98％以上，丙二醇甲醚的选择性达95％，收率达93％，产品中伯醚的选择性为92％～93％。

According to the problem of outlet leakage of propane on the propane pump mechanical seal in the olefine factory of Qilu petro-chemical company, the new-type assembling non-contacting mechanical seal for propane pump was developed firstly on the basis of the principle of non-contacting of mechanical seal .

针对齐鲁石化公司烯烃厂丙烷泵机械密封频繁出现汽喷现象、密封端面泄漏严重的问题，根据非接触式机械密封原理，研制开发出了丙烷泵用新型非接触式机械密封。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。