以对羟基苯甲酸和1,10菲啰啉为配体铜配合物的合成及与DNA的作用

通过元素分析、红外光谱、紫外光谱及差热热重分析,对合成的一种新型铜配合物Cu(phen)(DPA)0.5·3H_2O(phen=1,10菲啰啉,DPA=对羟基苯甲酸)进行了结构表征,并以鲱鱼精DNA为靶点,采用光谱法、DNA粘度滴定实验和循环伏安法,研究了该配合物与DNA的键合方式。结果发现:在加入DNA后,配合物的吸收峰出现减色和红移,荧光强度增强;DNA的相对粘度随配合物的加入而增大;配合物在加入DNA后的氧化还原峰电流减小,式量电位发生正移。这些实验结果表明配合物与DNA通过嵌插方式发生作用。     

基于配体邻菲啰啉和肉桂酸构筑的铜配合物的合成、电化学性质及与DNA的相互作用

采用了光谱法、粘度法和差示脉冲伏安法,研究了合成的三元铜配合物[Cu(Phen)(CA)2]·2H2O(Phen=1,10-邻菲啰啉,CA=肉桂酸)与鲱鱼精DNA之间的相互作用。结果显示:在加入DNA后,配合物的最大吸收峰发生明显的红移,产生减色效应,配合物的峰电位发生正移,峰电流明显降低。同时配合物也能较大程度地猝灭中性红(NR)-DNA体系的荧光,能使DNA的相对粘度增大。这些信息都证明配合物与DNA存在插入结合。     

铕、铽-α(β)-萘酸-邻菲哕啉三元配合物的合成及性质研究

分别以α-萘甲酸(α-HNMA)、β-萘甲酸(β-HNMA)、α-萘乙酸(α-HNAA)、β-萘乙酸(β-HNAA)为第一配体,1,10-邻菲啰啉(phen)为第二配体,合成了4种Eu(Ⅲ)和4种Tb(Ⅲ)的三元配合物.通过元素分析、配位滴定确定了各配合物的组成.通过红外光谱对配合物的结构进行了初步表征,发现各配体的特征吸收峰(VC=O、VC=N)在形成配合物后不同程度地向低波数方向移动,说明配合物中羧基氧原子和邻菲啰啉中的氮原子均参与了配位.采用TG-DTG技术对8种配合物的热分解过程进行了研究,8种配合物均有较好的热稳定性.室温下测得了各配合物粉末的激发和发射光谱,结果表明,4种铕的三元配合物均发出红色荧光,最强发射峰613 m附近的强度顺序为Eu(β-NMA)3phen＞Eu(α-NMA)3phen·H2O＞Eu(α-NAA)3phen＞Eu(β-NAA)3phen·H2O.4种铽的三元配合物无明显的荧光现象.     

铕、铽-α(β)-萘酸-邻菲啰啉三元配合物的合成及性质研究

分别以α-萘甲酸(α-HNMA)、β-萘甲酸(β-HNMA)、α-萘乙酸(α-HNAA)、β-萘乙酸(β-HNAA)为第一配体,1,10-邻菲啰啉(phen)为第二配体,合成了4种Eu(III)和4种Tb(III)的三元配合物。通过元素分析、配位滴定确定了各配合物的组成。通过红外光谱对配合物的结构进行了初步表征,发现各配体的特征吸收峰(νC=O、νC=N)在形成配合物后不同程度地向低波数方向移动,说明配合物中羧基氧原子和邻菲啰啉中的氮原子均参与了配位?捎肨G-DTG技术对8种配合物的热分解过程进行了研究,8种配合物均有较好的热稳定性。室温下测得了各配合物粉末的激发和发射光谱,结果表明,4种铕的三元配合物均发出红色荧光,最强发射峰613 nm附近的强度顺序为:Eu(β-NMA)3phen>Eu(α-NMA)3phen.H2O>Eu(α-NAA)3phen>Eu(β-NAA)3phen.H2O。4种铽的三元配合物无明显的荧光现象。     

新型稀土荧光材料的合成及表征

合成了3种新型荧光材料Eu(o-OHC6 H4COO)2(phen)2(NO3)、Eu(p-OHC6 H4CH2COO)3(phen)和Eu(C6H5CHOHCOO)3(phen)(H2O),并通过元素分析、红外光谱、紫外光谱和荧光光谱对其进行了表征.通过对配合物荧光性能的研究,表明这3种配合物是较好的荧光材料.     

安息香-邻菲罗啉-铕三元配合物的合成及光致发光性能

合成了配体安息香(BZ)和新的铕配合物Eu(BZ)_3 phen,并用元素分析(EA)、IR、~1H-NMR和UV对配合物进行了表征;配合物Eu(BZ)_3 phen在波长310nm激发下,发出以铕的特征发射谱线612nm左右为主的强荧光,对应跃迁为~5D_0→~7F_2;安息香对铕离子具有敏化作用,是铕配合物的良好配体.     

铕-月桂酸-邻菲罗啉三元配合物的合成及发光性能研究

合成了铕(Eu)-月桂酸(L1)-邻菲罗啉(phen)三元配合物Eu(L1)3phen,通过元素分析、红外光谱、紫外吸收光谱、透射电镜及荧光光谱对配合物进行了表征,结果表明配合物的紫外吸收主要是配体吸收,在聚乙烯吡咯烷酮(PVP)中基本达到均匀分散;配合物在617nm处能发出较强的特征荧光,对应跃迁为5 D0→7 F2,说明配合物具有很好的荧光性质。     

一种新的可聚合铕配合物单体的合成及其发光性质

合成了新的可聚合的β-二酮(MADBM)及其铕配合物Eu(MADBM)3phen,并用元素分析(EA)、IR、1HNMR,XPS和UV对配合物进行了表征;配合物Eu(MADBM3phen在波长340nm激发下,发出以铕的特征发射谱线615nm左右为主的强荧光,对应跃迁为5D0→7F2;MADBM对铕离子具有强烈的敏化作用,是铕离子的良好配体并具有可聚合性.     

2-苄基-1,3-二苯基-1,3-丙二酮的合成及其铕配合物光致发光

合成了新的配体2-苄基-1,3-二苯基-1,3-丙二酮和新的铕配合物Eu(RDBM)3phen,并用元素分析(EA)、IR和UV对配合物进行了表征;配合物Eu(RDBM)3phen在波长328nm激发下,发出以铕的特征发射谱线615nm左右为主的强荧光,对应跃迁为5D0→7F2;2-苄基-1,3-二苯基-1,3-丙二酮对铕离子具有敏化作用,是铕配合物的良好配体.     

多元苯甲酸铕配合物的合成及其荧光性能研究

分别合成了Eu3+-苯甲酸(BA)-丙烯酸(AA)和Eu3+-苯甲酸(BA)-丙烯酸(AA)-邻菲罗啉(phen)有机稀土配合物,通过元素分析、红外光谱和紫外光谱确定了它们的结构式分别为Eu3+(BA)2(AA)和Eu3+(BA)2(AA)(phen),同时研究了样品的荧光性和热性能,荧光光谱表明样品引入邻菲罗啉后,荧光强度和荧光单色性大大提高,热分析表明该配合物具有优异的热稳定性.     

凝固科学技术与材料

从凝固科学与实践发展的角度介绍了当前凝固材料体系的基本框架和凝固科学主要发展阶段的基本理论。作为材料科学与工程的基本组成，凝固科学技术正在现代科学理论的基础上针对传统材料的改性提高和新材料的发展需求，以控形、控构、控性为目标开展优质铸件的定向、晶体生长、快凝、深过冷及各种新型和超常领域凝固过程的研究，并介绍了其中某些方面和展望了可能的发展趋势。     

Development and challenges of planning and scheduling for petroleum and petrochemical production

Production planning and scheduling are becoming the core of production management, which support the decision of a petrochemical company. The optimization of production planning and scheduling is attempted by every refinery because it gains additional profit and stabilizes the daily production. The optimization problem considered in industry and academic research is of different levels of realism and complexity, thus increasing the gap. Operation research with mathematical programming is a conventional approach used to address the planning and scheduling problem. Additionally, modeling the processes, objectives, and constraints and developing the optimization algorithms are significant for industry and research. This paper introduces the perspective of production planning and scheduling from the development viewpoint.     

江澳两地高校文创设计的协同研究与商业实践

目的 探索江门世遗文化的传承、发展和转化的新思路,践行国家在《粤港澳大湾区发展规划》纲要中要求江门承担与港澳地区文化创意合作与开发任务的分工。方法 与澳门高校紧密合作,开展专业培训课程,以开平碉楼为例,从人文视角开展设计研究,梳理开平碉楼的文化脉络,把世遗文化的元素和其背后的文化融入文创产品中,提升文创产品的附加值,推动当地文创产业结构的变革。结果 两地高校构建了稳定的科研团队,开设长期有效的设计培训课程,与景区建立了研究协作关系,帮助景区构建了一套产销研的商业模式。结论 以跨区域高校合作为平台,以文创产品为抓手,依托江澳两地的资源优势,可以构建江门世遗文化全新的品牌形象,最终推动开平世遗文化的活化。     

Error and uncertainty in modeling and simulation

This article develops a general framework for identifying error and uncertainty in computational simulations that deal with the numerical solution of a set of partial differential equations (PDEs). A comprehensive, new view of the general phases of modeling and simulation is proposed, consisting of the following phases: conceptual modeling of the physical system, mathematical modeling of the conceptual model, discretization and algorithm selection for the mathematical model, computer programming of the discrete model, numerical solution of the computer program model, and representation of the numerical solution. Our view incorporates the modeling and simulation phases that are recognized in the systems engineering and operations research communities, but it adds phases that are specific to the numerical solution of PDEs. In each of these phases, general sources of uncertainty, both aleatory and epistemic, and error are identified. Our general framework is applicable to any numerical discretization procedure for solving ODEs or PDEs. To demonstrate this framework, we describe a system-level example: the flight of an unguided, rocket-boosted, aircraft-launched missile. This example is discussed in detail at each of the six phases of modeling and simulation. Two alternative models of the flight dynamics are considered, along with aleatory uncertainty of the initial mass of the missile and epistemic uncertainty in the thrust of the rocket motor. We also investigate the interaction of modeling uncertainties and numerical integration error in the solution of the ordinary differential equations for the flight dynamics.     

Density and viscosity of tetralin and trans-decalin

New measurements are reported for the density and viscosity of tetralin and trans-decalin. The density was determined from room temperature to 60°C for tetralin and to 95°C for trans-decalin. The kinematic viscosity was measured up to temperatures slightly above 100°C. Our results improve upon the values recommended by the American Petroleum Institute for these liquids.     

The Candela and Photometric and Radiometric Measurements

The national measurement system for photometric and radiometric quantities is presently based upon techniques that make these quantities traceable to a high-accuracy cryogenic radiometer. The redefinition of the candela in 1979 provided the opportunity for national measurement laboratories to base their photometric measurements on optical detector technology rather than on the emission from high-temperature blackbody optical sources. The ensuing technical developments of the past 20 years, including the significant improvements in cryogenic radiometer performance, have provided the opportunity to place the fundamental maintenance of photometric quantities upon absolute detector based technology as was allowed by the 1979 redefinition. Additionally, the development of improved photodetectors has had a significant impact on the methodology in most of the radiometric measurement areas. This paper will review the status of the NIST implementation of the technical changes mandated by the 1979 redefinition of the candela and its effect upon the maintenance and dissemination of optical radiation measurements.     

Creation and motion of dislocations and fracture in metal and silicon crystals

By making a step on one surface ( ) of a rectangular small paralellepiped copper crystal, dislocations could be created by the molecular dynamic method. The dislocation created was not a complete edge dislocation but a pair of Heidenreich-Shockley partial dislocations. Each time a dislocation was created, the stress on the surface was released. Small copper crystals having a notch were pulled (until fracture), compressed and buckled by use of the molecular dynamic method. An embedded atom potential was used to represent the interaction between atoms. Dislocations were created near the tip of the notch. A very sharp yield stress was observed. The results of high speed deformations of pure silicon small crystals using the molecular dynamics are presented. The results suggest that plastic deformation may be possible for the silicon with a high speed deformation even at room temperature. Another small size single crystal, the same size and the same surfaces, was compressed using molecular dynamic method. The surfaces are {110}, {112} and {111}. The compressed direction was [111]. It was found that silicon crystals are possible to be compressed with a high speed deformation. This may suggest that silicon may be plastically deformed with high speed deformation.     

SMC／BMC的回收与再利用

SMC／BMC废弃物对工业及环境造成了很大影响，指出了SMC／BMC回收再利用的紧迫性。通过对目前国际上SMC／BMC回收再利用的3种典型途径优缺点的对比，参照国外SMC／BMC回收再利用的先进方法，对我国SMC／BMC回收再利用提供了可行的建议．