Results 121 to 130 of about 83,678 (232)
Several Original Applications of Water-soluble Phthalocyanines as Optical Probes in Analytical Sciences [PDF]
酞菁化合物大多性质稳定、易于合成、结构可修饰性强,可引入各类活性基团从而获得具有各种功能的衍生物。尤为难得的是,中心配位原子为反磁性的金属酞菁化合物大多具有荧光量子产率高、荧光发射在红色区域且可进行长波激发(因而可有效避开背景荧光和散射光的干扰)等优良荧光特性。本学位论文围绕金属酞菁作为光学分子探针在分析科学的应用而展开,共六章。 第一章首先对酞菁的结构、基本性质与应用作了简要介绍。重点阐述酞菁在分析科学领域的应用,包括酞菁在催化动力学分析中的应用、酞菁作为光学探针的应用以及酞菁作为光学成像探针的应用等。
郭梦林
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ABSTRACT MCrAlX coatings are widely used as bond coats in thermal barrier coating systems to protect turbine blades from high‐temperature oxidation. However, their oxidation resistance is often restricted by uncontrolled microstructures, surface roughness, and aggregation of reactive elements (REs). In this study, high‐repetition‐rate femtosecond laser
Wei Qian +7 more
wiley +1 more source
采用蒙特卡罗方法模拟辐射诱导DNA损伤过程,通过获得的细胞水平数字化损伤产额评估空间辐射环境生物学效应。基于空间环境中的主要辐射来源,结合蒙特卡罗损伤模拟程序(Monte Carlo Damage Simulation,MCDS),首先针对单能状态下的质子、氦离子、碳离子、氧离子、硅离子和铁离子设置了10~105 MeV不等间隔的5个能量点,同时选择典型太阳质子事件能谱以及太阳极小时和极大时银河宇宙射线中的主要粒子能谱作为辐射源项代表,分别进行了DNA双链断裂(Double Strand Breaks ...
齐 婕, 闫 庆倩
doaj +1 more source
Modification of Ge surface by plasma technology and its application in GOI and Al/n-Ge contact [PDF]
锗材料由于具有比硅材料高的电子和空穴迁移率,在通信波段有较高的吸收系数并且与成熟的硅工艺相兼容等优点,使其成为下一代高性能微电子器件的首选替代材料。然而Ge器件存在着漏电流大的致命缺点,同时Ge器件尺寸的缩小会引入一些小尺寸效应。绝缘体上锗(Germanium-on-Insulator,GOI)结合了Ge材料及SOI(Silicon-on-Insulator)结构的优点,其独特的全介质隔离结构可以很好地解决体Ge材料器件的不足。虽然采用智能剥离技术(Smart-cutTM ...
赖淑妹
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Eimeria saudiensis represents a genus of apicomplexan parasites capable of inducing coccidiosis in Arabian oryx. Our research concentrated on the morphological and molecular investigation of Eimeria spp. in the captive oryx herd in Oman. The therapeutic and management practices employed at the Mammals Breeding Center were reassessed to diminish ...
Khalid Al‐Habsi +7 more
wiley +1 more source
Garnet and LISICON-type Solid Electrolytes: Synthesis, Performance and Ionic Diffusion Dynamics [PDF]
相对于有机液体电解液,无机固体电解质在化学与电化学稳定性方面具有无可比拟的优势,能极大提升锂离子电池安全性能及其循环稳定性,近年来成为可充锂(离子)电池研究者所关注的热点。其中,对Li4SiO4-Li3PO4(LISICON)体系的研究已经有近30年的历史,由于其较低的原料成本、较为容易的合成条件及良好的稳定性,研究者对该体系依然保持着很高的研究兴趣。Garnet型固体电解质是新兴锂离子导体,由于其具有高Li+电导率和良好的稳定性,一问世便引起工作者极大的研究兴趣 ...
王大为
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Read the free Plain Language Summary for this article on the Journal blog. Abstract The nested subset pattern (nestedness) has been widely used to explain species distributions in island and fragmented systems. Mountain sky islands serve as critical natural laboratories for understanding the evolutionary consequences of geographic isolation and climate
Caiwen Zhang +5 more
wiley +1 more source
DLC film prepared with multiple gas sources and its applications [PDF]
类金刚石膜(Diamond-LikeCarbon,DLC)是一种介于金刚石和石墨之间的非晶结构材料。类金刚石膜具有和金刚石类似的许多独特的优良性能,因此被广泛应用在机械、光学、电学以及生物等领域。 等离子体化学气相沉积(PECVD)法是生长含氢DLC膜的常见方法,通常把衬底放在PECVD腔体中的源电极上生长DLC薄膜,这样生长的DLC膜具有更高的硬度。本文采用浸入式PECVD方法生长DLC薄膜,把衬底浸入到等离子体中,使其面临的电场强度和离子团密度等生长参数有别于源电极式PECVD法 ...
魏晓丽
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In vitro culture, cryopreservation, and field reintroduction of the endangered Mingan thistle
Abstract Current plant conservation efforts are hindered by, for example, poor seed germination, low viability, and insufficient propagation and preservation technologies. To address these problems, we devised an approach to plant conservation that integrates conservation, preservation, and restoration (CPR), which uses advanced in vitro techniques. We
Mukund R. Shukla +4 more
wiley +1 more source
采用分子印迹固相萃取,实现对海水中莠去津的高效分离富集,消除海水基体效应,以低检出限分子印迹聚合物膜离子选择性电极为传感器敏感元件,实现对莠去津的高灵敏电位检测,结合在线过滤等流动分析自动化处理 技术提高传感器体系分析效率,开发出了一类能够在线快速检测海水中莠去津浓度的新型电位型传感器系统。所开发的检测系统对莠去津检测的线性范围在5×10-10 ~4×10-9 mol L-1 ,检出限可达9×10-11 mol L-1 ...
梁荣宁 高奇 尹坦姬 秦伟 +1 more
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