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Influences of Temperature and Solvent Ions in Solution on States and Properties of Deoxyribonucleic Acid （DNA）

Communications in Theoretical Physics 2005年第6期43卷 1141-1152页

作者： PANGXiao-Feng fengyuan-ying ZHANGHuai-Wu A.F.Jalbout DONGRui-Xin InstituteofLifeScienceandTechnology UniversityofElectronicScienceandTechnologyofChinaChengdu610054China／／DepartmentofPhysicsNationalUniversityofSingaporeSingapore119260 DepartmentofPhysics NationalUniversityofSingaporeSingapore119260 CollegeofSolid-StateElectronics UniversityofElectronicScienceandTechnologyofChinaChengdu610054China DepartmentofPhysics DillardUniversityNewOrleansLA70112USA InstituteofLifeScienceandTechnology UniversityofElectronicScienceandTechnologyofChinaChengdu610054China

We here study the influences of the temperature and solvent ions in solution on the states and properties of DNA by a new dynamical model. This model admits three degrees of freedom per base-pair: two displacement variables related to the vibrations of the hydrogen atom in the hydrogen bonds and base (nucleotide), respectively, and an angular variable related to the rotation of each base, which delineate different forms of motion of the hydrogen atom and bases and the relations among them. In this -model we stress specially the important role of the hydrogen atom in the hydrogen bonds of the bases in the dynamics of DNA. According to their properties of motion we give the Hamiltonian of the system and the corresponding equations of motion, and End out their soliton solutions. The solitons formed by the displacements of the hydrogen atoms and bases and their rotations are the excitation states arising from the energy absorbed by the DNA working at the biological temperature. We give further the free energy of the thermal excitation state in DNA system by transfer integral way and End out the corresponding specific heat. The specific heat increases with the increasing of the temperature and concentration of the solvent ions in the solution, but is not linear changes in the region of high temperature. If compared with experimental data, they are approximately consistent. Meanwhile we End that the solvent ion conceptration influences seriously on the stability, states, and configurations of DNA.

关键词： dynamical property DNA nonlinearity soliton solvent ion specific heat

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铜催化N-烯基丙烯酰胺氰异丙基化/烯基化反应合成1,3-二氢吡咯-2-酮（英文）

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有机化学 2019年第12期39卷 3524-3531页

作者：戴恩睿罗清陈春琳盈凤元董英刘颖杰王宝玲马银海梁德强昆明学院化学化工学院昆明650214 山东师范大学化学化工与材料科学学院济南250014 哈尔滨商业大学药学院药物工程技术研究中心哈尔滨150076 云南省塑料薄膜制品工程技术研究中心昆明650214

报道了铜催化的化学选择性N-烯基丙烯酰胺氰异丙基化/环化级联反应,利用该反应可以实现1,3-二氢吡咯-2-酮的合成.丙烯酰胺的自由基环合反应中,用于捕获分子内自由基的基团主要局限于芳基、炔基和氰基,而本工作使用烯胺双键作为内置自由... 详细信息

报道了铜催化的化学选择性N-烯基丙烯酰胺氰异丙基化/环化级联反应,利用该反应可以实现1,3-二氢吡咯-2-酮的合成.丙烯酰胺的自由基环合反应中,用于捕获分子内自由基的基团主要局限于芳基、炔基和氰基,而本工作使用烯胺双键作为内置自由基捕获基团,以丙烯酰胺双键作为自由基受体.该反应的化学选择性可能是由自由基反应的极性匹配原则决定.

关键词：烯酰胺烯烃偶氮化合物自由基反应铜

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Valley-filling instability and critical magnetic field for interaction-enhanced Zeeman response in doped WSe_(2) monolayers

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npj Computational Materials 2021年第1期7卷 1842-1849页

作者： fengyuan Xuan Su ying Quek Centre for Advanced 2D Materials National University of Singapore6 Science Drive 2Singapore 117546Singapore Department of Physics National University of Singapore2 Science Drive 3Singapore 117551Singapore NUS Graduate School Integrative Sciences and Engineering Programme National University of SingaporeSingaporeSingapore Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore

Carrier-doped transition metal dichalcogenide(TMD)monolayers are of great interest in valleytronics due to the large Zeeman response(g-factors)in these spin-valley-locked materials,arising from many-body *** develop an ab initio approach based on many-body perturbation theory to compute the interaction-enhanced g-factors in carrier-doped *** show that the g-factors of doped WSe2 monolayers are enhanced by screened-exchange interactions resulting from magnetic-field-induced changes in band *** interaction-enhanced g-factors g*agree well with *** traditional valleytronic materials such as silicon,the enhancement in g-factor vanishes beyond a critical magnetic field Bc achievable in standard *** identify ranges of g*for which this change in g-factor at Bc leads to a valley-filling instability and Landau level alignment,which is important for the study of quantum phase transitions in doped *** further demonstrate how to tune the g-factors and optimize the valley-polarization for the valley Hall effect.

关键词： effect interaction critical

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Author Correction:Valley-filling instability and critical magnetic field for interaction-enhanced Zeeman response in doped WSe_(2)monolayers

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npj Computational Materials 2022年第1期8卷 15-16页

作者： fengyuan Xuan Su ying Quek Centre for Advanced 2D Materials National University of Singapore 6 Science Drive 2 Singapore 117546 Singapore Department of Physics National University of Singapore 2 Science Drive 3 Singapore 117551 Singapore NUS Graduate School Integrative Sciences and Engineering Programme National University of Singapore Singapore Singapore Department of Materials Science and Engineering National University of Singapore Singapore Singapore

The original version of the Supplementary Information associated with this Article contained an error in Supplementary Fig.2,in which the equation was incorrect.

关键词： critical Zeeman interaction

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Ideas for Accelerating Development of Deep Processing Industry of Agricultural Products--A Case Study of Nanchong City

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Asian Agricultural Research 2018年第12期10卷 19-25页

作者： fengyuan LI Changjia PENG Jun LUO Jiawei DU ying GAO Ning LU Nanchong Agricultural Information Service Station Nanchong 637000China Nanchong National Modern Agriculture Management Committee Office Nanchong 637000China Nanchong Plant Protection and Quarantine Station Nanchong 637000China Nanchong Sericulture Management Station Nanchong 637000China

In order to provide certain references for further deepening the development of processing industry of agricultural products,this paper analyzed and elaborated the basic principles,construction priorities and safeguard measures of the development of deep processing industry of agricultural products in Nanchong City of Sichuan Province. Besides,it made a scientific planning for accelerating the deep processing of agricultural products in Nanchong City in 2018-2020,to ensure the full implementation of fine and deep processing of agricultural products.

关键词： Agricultural products Fine and deep processing Nanchong City

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Present Situation and Development Countermeasures of Modern Agriculture Industrial Clusters of 100 Billion Output in Nanchong City

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Asian Agricultural Research 2018年第11期10卷 23-30,42页

作者： fengyuan LI Changjia PENG Jun LUO Jiawei DU ying GAO Ning LU Nanchong Agricultural Information Service Station Nanchong 637000 China Nanchong Office of National Modern Agriculture Management Committee Nanchong 637000 China Plant Protection and Quarantine Station of Nanchong City Nanchong 637000 China Nanchong City Sericulture Management Station Nanchong 637000 China

Industrial clusters have an obvious role in promoting regional economic development and can enhance region core *** order to rapidly promote the economic development of Nanchong,from the aspects of agricultural resources,brand advantages,modern agricultural demonstration zones,deep processing of agricultural products and cold chain logistics,the development status of modern agricultural industrial clusters of 100 billion output in Nanchong City is summarized in this article. For existing problems,resolution strategies are proposed from the aspects of focuses,work paths and safeguards.

关键词：产业集群区域经济发展现状经济发展

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Strategic Measures for Implementing 300 Demonstration Projects to Lead the Construction of Modern Agricultural Industrial Clusters with Output of 100 Billion Yuan

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Asian Agricultural Research 2018年第11期10卷 14-22页

作者： ying GAO Changjia PENG fengyuan LI Jun LUO Jiawei DU Feng LUO Ning LU Nanchong Agricultural Information Service Station Nanchong 637000 China Nanchong National Modern Agriculture Management Committee Office Nanchong 637000 China Nanchong Plant Protection and Quarantine Station Nanchong 637000 China Nanchong Sericulture Management Station Nanchong 637000 China Nanchong Soil and Fertilizer Station Nanchong 637000 China

To carefully implement the rural revitalization strategy,further promote the structural reform of the agricultural supply front,implement the "155 Development Strategy",speed up the cultivation of the modern agricultural industrial clusters with output of 100 billion yuan,and constantly consolidate the industrial foundation of the " Second City in Chengdu-Chongqing Line",the Municipal Party Committee and the Municipal Government of Nanchong City decided to implement the " 300 Demonstration Projects" of modern agriculture. It firmly grasps the " bull nose"( key part) of the project,energetically implements the construction of 100 modern circular agricultural demonstration parks,100 agricultural leading enterprises with output value of 100 billion yuan,and 100 agricultural new business model demonstration projects( hereinafter referred to as 300 Demonstration Projects),to realize the goal of the output value of the modern agriculture industrial clusters of Nanchong City exceeds 100 billion yuan in 2020.

关键词：农村振兴战略供应链结构改革

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Main Measures and Achievements in the Development of Organic Agriculture in Nanchong City

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Asian Agricultural Research 2019年第10期11卷 11-17页

作者： ying GAO Changjia PENG fengyuan LI Jiawei DU Jun LUO Ning LU Wanqiu WANG Nanchong Agricultural Information Service Station Nanchong 637000China Nanchong Plant Protection and Quarantine Station Nanchong 637000China Nanchong Silkworm Management Station Nanchong 637000China Nanchong Soil and Fertilizer Station Nanchong 637000China

In order to improve the quality and efficiency of agriculture,increase farmers'income steadily and rapidly,and improve the ecological environment of agriculture,a strong city of organic agriculture should be constructed in Nanchong *** on ecological agriculture,Nanchong makes great efforts to build a strong city of organic agriculture,takes environmental protection supervision as an opportunity to promote sustainable agricultural development feasibly,takes regional brands as the starting point,and promotes the development of agricultural *** main measures and achievements of the development of organic agriculture in Nanchong City are analyzed and discussed starting with the next work plan.

关键词： Organic agriculture Main measures Achievements Next work plan

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基于阶跃射流的撞击流反应器流场动态特性分析

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化工学报 2022年第2期73卷 622-633页

作者：张建伟安丰元董鑫冯颖沈阳化工大学机械与动力工程学院辽宁沈阳110142

利用实验与数值模拟方法对动态阶跃型撞击流反应器流场特性进行研究,分析不同入口速度条件下流体流动规律、湍流特性以及能量水平。结果表明,动态阶跃型入口条件下,撞击面在两喷嘴之间周期性移动,流动参数也会发生周期性变化。随着入口... 详细信息

利用实验与数值模拟方法对动态阶跃型撞击流反应器流场特性进行研究,分析不同入口速度条件下流体流动规律、湍流特性以及能量水平。结果表明,动态阶跃型入口条件下,撞击面在两喷嘴之间周期性移动,流动参数也会发生周期性变化。随着入口平均速率的增大,驻点速度逐渐增大;随着两喷嘴入口速率差的增加,撞击面移动速度加快,撞击区流体湍流强度逐渐增加;随着入口平均速率与入口速率差的增大,XOZ平面在一个周期内的平均湍动能逐渐减小。对比动态撞击流反应器与稳态撞击流反应器内流场特性,探究动态入口条件对撞击流反应器流场特性的影响。结果表明,动态阶跃撞击流反应器湍流黏度、湍流强度和湍动能等参数均明显高于稳态撞击流反应器,撞击轴线上的湍动能梯度分布大于稳态撞击流反应器。动态入口条件下撞击流反应器流体湍动更剧烈,能量水平更高,有利于增加流场内流体扰动与促进混合。

关键词：撞击流动态调节数值模拟湍流实验验证

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Space Life Science of China

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空间科学学报 2018年第5期38卷 820-828页

作者： MA Hong REN Hao LI Xiaoqiong YANG Chunhua CHEN Yu WANG Rui ying Zhang WANG Changyong ZHOU Jin LI Hong JIANG Xiaoxia ZHANG Fengzhi HAO Tong ZHU Huimin DONG Xiaohui ZHENG Huiqiong WANG Lihua SUN Weining TONG Guanghui ZHENG Weibo ZHANG Tao LONG Mian LIU Hong ZHUANG fengyuan DENG Yulin School of Life Science Beijing Institute of Technology Institute of Military Cognitive and Brain Sciences Academy of Military Medical Sciences Center for Excellence in Molecular Plant Sciences Institute of Plant Physiology and EcologyChinese Academy of Sciences Shanghai Institute of Technical Physics Chinese Academy of Sciences National Microgravity Laboratory Institute of Mechanics Chinese Academy of Sciences School of Biological Science and Medical Engineering Beihang University

With the human space exploration activities, space life science is an emerging interdiscipline,which covers a wide range of researches. Based on our country's manned space station and recoverable satellite science experimental platform, the development of space life science research is very important to acquire new knowledge or new technological innovation, to give further services to the human space exploration activities,to improve the national economic and social development. Both ground-based and flight applied studies were continuously performed in the previous 2 years. Here, we review and summarize the researches on space life sciences contributed by Chinese scientists.

关键词：空间生命科学中国科学家探索活动科学研究国家经济太空站试验性开发

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