查询词典 quaternary

Then, inhibition mechanism and the relations between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles and quaternary ammonium salts are studied from microscope through quantum chemistry calculation, and according to the results, theory predicting and proof testing of a benzene nitrile (2-benzo butyl nitrile) are made.

利用Hansch关系的研究结果表明，苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀效率，可用苯腈类化合物氰基氮原子的净电荷密度和分子最高占据轨道能量或分子最低空轨道能量构成的表达式表达。量子化学计算研究结果表明：1、苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀机理可能是：苯腈类化合物分子以其氰基氮原子上的电子提供给铁的3d空轨道，形成配位键；同时铁的3d轨道上的电子提供给苯腈类化合物分子的能量最低空轨道，形成&反馈键&。

With the progress of the theory and methodology of Cosmogenic surface exposure dating, the technique has been widely used in studies of Quaternary glaciations, impact craters, volcanic surfaces, and fault faces.

宇宙成因核素地表暴露测年技术的理论和方法日臻完善，目前它已被广泛到第四纪冰川、撞击坑、火山地貌、断层面等地学问题中来。

METHODS The HPLC system consisted of G1314A variable wavelength uv-visible detector, Hypersil ODS (4.6mm × 250mm,Sμ m), HP chemstation,Hp1100 series quaternary pump and vacuum degasser (G1322A). The mobile phase was acetonitrile:water (30: 70, v/v).

方法采用HP1100高效液相色谱仪(包括G1314A可变波长紫外检测器，HP化学工作站，G1322A真空脱气机，HP1100四元泵)，Hypersil ODS柱(4.6mm×250mm，5μm)。

According to the analysis result,the condition of the Chengbei Sea ground settlement were summarized:1 The stratum of the study area above 30m is Quaternary Holocene deltaic deposit and neritic facies deposit,and the geologic structure is silty soil,muddy-silty clay,silty clay and silt.

根据分析结果，对埕北海域的地面沉降情况进行了总结：1研究区埋深30m以浅地层为第四纪全新世三角洲沉积和浅海相沉积地层，其结构是粉土、淤泥质粉质粘土、粉质粘土和粉砂。

The fault, stretching about 20km, with strike NE45° and dip NW, is situated in the place between the bed rock and Quaternary sediments. Fault deltidial surface and scratch can be seen at the bare bed rock of bottom wall.

之间。断裂位于台地前缘基岩与盆地南缘第四纪沉积层之间，断裂延伸约20km以上；断裂下盘基岩一侧有清楚的断层三角面和断层擦痕等，断层走向NE45。

An organic cationic flocculant containing quaternary ammonium ion was synthesized using epichlorohydrin, diethylamine and 1, 2-diaminoethane as raw materials. The intrinsic viscosity, charge density and turbidity removal rate of PEFD were determined and its structure was characterized by FT-IR.

以环氧氯丙烷、二乙胺和乙二胺为原料合成了有机阳离子絮凝剂PEFD，对其电荷密度、特性粘度以及絮凝性能进行了测试，并采用红外光谱对其结构进行了表征。

This mudstone formation is deposited from the late Tertiary to the early Quaternary. Due to the shorter digenetic period, it has some unfavorable properties such as lower strength, swelling and slaking behaviors, lower resistance of weathering, etc.

泥岩形成於第三纪的末期及第四纪前期，成岩时间较短，强度较低，遇水后易产生回胀、崩解的现象，抵抗外在环境的能力较差，特别是水的影响。

In this Ph. D. dissertation, reverse microemulsion method was fully used infabricating and modifying polyacrylamide with functional and high-relative moleculeweight. The copolymerization of 2-acrylamide-2-methylpxopanesulfonic acid, fluorescent monomer 4-methoxy-N-(2-N\', N\'-dimethylamino ethyl)naphthalimide alkyl chloride quaternary ammonium salt, fluorescentmonomer 4-(N\'-methyl-1-piperazinylallyl)-N-butyl-naphthalimide chloride quaternaryammonium salt, Cationic monomer dimethylethylammonium bromide and hydrophobical monomer octadecylacrylate with acrylamide and properties of the copolymers werestudied. The interaction between five polymers and Al_2O_3(012) crystal surface have beensimulated by Materials Studio 3.0 program package, binding energies and non-bondinteraction energies and deformation energies have also been acquired.

本文以制备具有较高相对分子质量和功能型PAM为研究目的，将反相微乳液法运用到其制备及改性的有关环节，通过反相微乳液聚合工艺，将几种改性功能单体2-丙烯酰胺基-2-甲基-丙磺酸、荧光单体2-(4-甲氧基-1，8-萘二甲酰亚胺基)-乙基二甲基烯丙基氯化铵、荧光单体4-(N'-甲基-1-哌嗪基)-N-丁基-1，8-萘烯丙氯季铵盐、阳离子单体丙烯酰氧乙基-二甲基-乙基溴化铵和疏水单体丙烯酸十八酯与AM共聚，制备AMPS改性PAM、荧光示踪型PAM、阳离子单体DMB改性PAM和OA改性PAM等四类不同功能单体改性PAM，并研究其应用性能。

This paper mainly studied the synthesis and characterization of some dissymmetric bis-quaternary ammonium gemini surfactants, then determined the surface tensions of their water solutions, finally calculated their critical micelle concentrations and build a surface tension-concentration model.

本文主要研究了非对称型季铵盐双子表面活性剂的合成与表征，测定了其水溶液的表面张力，并计算出其临界胶束浓度。

A bis-imdazoline corrosion inhibitor JUC was synthesized by reacting with divinyl three amine,and its quaternary ammonium JUCI was also synthesized for corrosion inhibition in acids.

以己二酸、二乙烯三胺为原料合成了双环咪唑啉缓蚀剂JUC，并对其季铵化后得到了适于酸化用的双环咪唑啉季铵盐缓蚀剂JUCI；采用静态挂片失重法对合成的缓蚀剂在酸化条件下的缓蚀性能及与非离子表面活性剂SA-1复配后的缓蚀性能进行了评价研究。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。