搜索结果: 1-15 共查到“理学 Lewis y”相关记录34条 . 查询时间(0.25 秒)
Research in Focus: Nikole Lewis explains unique worlds among newly discovered exoplanets（图）
系外行星 独特世界 Nikole·Lewis
2023/5/22
In 1995, astronomers found the first known planet around a sun-like star outside our solar system. The news caused a buzz of excitement around the world. Finally we had proof of a planet orbiting anot...
自然界存在大量氧化还原反应, 如光合作用、呼吸作用等, 其中电子的转移经常伴随着质子的同步迁移, 这种现象称为质子耦合电子转移(Proton Coupled Electron Transfer, PCET)。 在能源、环境、生物和化学等领域, PCET是一个十分常见的过程，也是一种被广泛发展的电子转移策略。比较而言，非质子Lewis酸耦合电子转移（Lewis Acid Coupled Electr...
Frank Lewis：教授，博士生导师。现为美国电气和电子工程师协会会士（IEEE Fellow）、国际自动控制联合会会士（IFAC Fellow）、美国国家发明家科学院院士、英国测控学会会士（InstMC Fellow）、英国皇家特许工程师、美国德克萨斯大学阿灵顿分校杰出学者教授、卓越教学教授、Moncrief-O'Donnell讲席教授、先进控制与传感研究所主任。长期从事非线性动态系统、自适...
近日，精密测量院邓风研究员团队在沸石分子筛催化剂Lewis酸性位的研究中取得新进展，实现了对以往“NMR不可观测”骨架三配位铝物种的探测，揭示其独特的Lewis酸性特征。
沸石分子筛作为一类重要的固体酸催化剂，因其具有规整的孔道结构、可调变的酸性（酸种类、酸分布、酸量、酸强度等）而被广泛应用于石油化工、精细化工、环境化工的各种催化过程。分子筛优良的催化反应性能与其独特的酸性紧密相关。
西安交通大学理学院科研人员在Lewis碱催化领域取得新进展（图）
西安交通大学理学院 科研人员 Lewis碱 催化领域
2019/8/26
近两年，西安交通大学理学院徐四龙研究团队采用缺电子环丙烷为底物，借助于三元环环张力和极化C-C键的协同作用，发展了若干Lewis碱催化的新型环化反应，包括叔胺催化环丙基酮的Cloke-Wilson重排反应高效合成二氢呋喃化合物、羟胺参与下的环丙基酮的Cloke-Wilson/Boulton-Katritzky开环重排串联反应合成异噁唑类化合物、叔膦催化缺电子乙烯基环丙烷的扩环重排反应构筑环庚烯酮化...
西安交通大学理学院唐玉海研究团队——在Lewis碱催化环丙烷开环反应研究中取得多项重要进展（图）
西安交通大学理学院 唐玉海 Lewis 碱催化环丙烷 有机合成化学 分子印迹技术 电化学
2018/4/23
Lewis碱催化是现代催化技术的重要组成部分，在有机合成中发挥着举足轻重的作用。Lewis碱催化通常采用n-π*、n-
针对以上问题，西安交通大学理学院唐玉海教授领衔的研究团队采用贫电子环丙烷作为底物，借助其极性碳碳键及环张力的结构特点，发展其在Lewis碱催化下以n-
该研究团队首先发展了叔胺催化环丙基酮的Cloke-Wilson重排反应用于高效合成二氢呋喃化合物（图1），相关研究发表在有机...
Lewis碱催化是现代催化技术的重要组成部分，在有机合成中发挥着举足轻重的作用。Lewis碱催化通常采用n-π*、n-𝜎*和n-n*三种模式实现底物的活化。目前，n-𝜎*活化模式主要涉及有机硅、锡、硫、硒和卤素等杂原子底物，而对于具有重要应用前景的碳碳单键的活化及催化反应研究非常欠缺并存在挑战。针对以上问题，西安交通大学理学院唐玉海教授领衔的研究团队采用贫电子环丙烷...
Professor Mark E. Lewis，School of Operations Research and Information Engineering at Cornell University（图）
Professor Mark E. Lewis School of Operations Research and Information Engineering at Cornell University
2015/8/14
Professor Lewis received his undergraduate degree in Mathematics and Political Science from Eckerd College in 1992, his Master's degree in Theoretical Statistics from Florida State University in 1995,...
Professor Adrian Lewis，School of Operations Research and Information Engineering at Cornell University（图）
Professor Adrian Lewis School of Operations Research and Information Engineering at Cornell University
2015/8/14
Adrian Lewis received his B.A., M.A., and Ph.D. degrees from Cambridge University, U.K. After faculty positions at the University of Waterloo and Simon Fraser University in Canada, he joined Cornell U...
Non-adiabatic KPP fronts with an arbitrary Lewis number
Non-adiabatic KPP arbitrary Lewis number
2015/7/14
We establish existence of travelling fronts in thermo-diffusive systems of the KPP type in a shear flow with an arbitrary Lewis number and a positive heat-loss at the boundary. We then prove that the ...
Travelling fronts for the thermodiffusive system with arbitrary Lewis numbers
Travelling fronts thermodiffusive system arbitrary Lewis numbers
2015/7/14
We consider KPP-type systems in a cylinder with an arbitrary Lewis number (the ratio of thermal and material diffusivities) in the presence of a shear flow. We show that traveling fronts solutions exi...
Associate Professor Katharine (Kate) Lewis，Department of Biology at Syracuse University（图）
Department of Biology at Syracuse University Associate Professor Specification and patterning of spinal cord interneurons
2015/1/12
Katharine (Kate) Lewis,Associate Professor,Department of Biology at Syracuse University.She is Research interests:Specification and patterning of spinal cord interneurons; Formation of functional neur...
Professor Lewis Ashwal，School of Geosciences at South Africa's Wits Universit（图）
School of Geosciences at South Africa's Wits Universit Professor Petrology mineralogy
2014/12/29
Lewis Ashwal,Professor,School of Geosciences at South Africa's Wits Universit.He is Research Interests:Petrology, mineralogy and geochemistry of anorthosite and related rocks; layered mafic intrusions...
Proving the existence of an operator that connects non-perturbed states to perturbed states, an alternative derivation of the Dalgarno-Lewis method is given.To illustrate that the Dalgarno-Lewis metho...
Crystallization of the Lewis-Wahnström ortho-terphenyl model
Crystallization Lewis-Wahnströ m ortho-terphenyl model
2010/11/19
Crystallization is observed during long molecular dynamics simulations of bent trimers, a molecular model proposed by Lewis and Wahnstrom for ortho-terphenyl. In the crystal, the three spheres that m...