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Viologen derivatives with extendedπ-conjugation structures:From supra-/molecular building blocks to organic porous materials

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Chinese Chemical Letters 2020年第7期31卷 1757-1767页

作者： xiao-He Zhou Yu Fan Wan-xia Li xiang Zhang Rong-Ran Liang Feng Lin Tian-Guang Zhan Jiecheng Cui Li-Juan Liu Xin Zhao Kang-Da Zhang Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life ScienceZhejiang Normal UniversityJinhua 321004China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China College of Science Department of PhysicsShanghai UniversityShanghai 200444China College of Chemical Engineering Hunan Chemical Vocational Technology College.Zhuzhou 310027China

Recently,increasing atte ntion has been paid on extending theπ-conjugation structures ofviologens(1,1’-disubstituted-4,4’-bipyridylium salts)by incorporating planar aromatic units into the bipyridinium *** viologen derivative s with extendedπ-conjugation structures have been synthesized,including the N-termini aromatic substituted viologens,the extendedπ-conjugated viologens(denoted as ECVs)as well as theπ-conjugated oligomeric viologens(denoted as COVs).These compounds typically exhibit interesting properties distinguished from those of an isolated viologen unit,which make them as new class of electron deficient supra-/molecular building blocks in supramolecular chemistry and materials *** this review,we would like to highlight the recent advances of viologen derivatives with extendedπ-conjugation structures in versatile applications ranging from electrochromic and energy storage materials,the ECV/COV-based supramolecular self-assembly systems including the linear supramolecular polymers and 2D/3D supramolecular organic frameworks(SOFs),to the viologen-based covalent organic frameworks(COFs)/*** hope this review will serve as an in-time summary worthy of referring,more importantly,to provide inspiration in the rational design of novel molecules with unexplored properties and functions.

关键词： π-Conjugated viologens Self-assembly Supramolecular polymers Supramolecular organic frameworks Ionic organic porous materials

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太赫兹波生物效应

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物理学报 2021年第24期70卷 70-83页

作者：彭晓昱周欢中国科学院重庆绿色智能技术研究院太赫兹技术研究中心重庆400714 中国科学院大学重庆学院重庆400714 重庆大学重庆400044

太赫兹波能被生物组织中的水强烈吸收,能与生物组织中生物大分子和这些分子间的弱相互作用产生共振,因而太赫兹波在生物医学中有许多潜在的应用.尽管单个太赫兹光子能量很低,对生物组织没有电离损伤作用,但是随着强度增大,太赫兹波会对... 详细信息

太赫兹波能被生物组织中的水强烈吸收,能与生物组织中生物大分子和这些分子间的弱相互作用产生共振,因而太赫兹波在生物医学中有许多潜在的应用.尽管单个太赫兹光子能量很低,对生物组织没有电离损伤作用,但是随着强度增大,太赫兹波会对生物细胞和组织产生一系列生物效应.由于太赫兹波参数和受辐照生物材料等辐照条件不同,将导致不同的生物学效应,包括以热效应为主和以非热效应为主导致的生物学效应.本文讨论了这两种效应的物理机理,介绍了适合用于生物效应研究的现今主要的强太赫兹辐射源种类,综述了典型的太赫兹波的生物效应具体表现和已有的研究进展,展望了太赫兹波生物效应的潜在应用以及面临的挑战.

关键词：太赫兹波生物效应热效应非热效应

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竞争光度法研究β-环糊精及其衍生物对左氧氟沙星和氧氟沙星的识别和含量测定

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中国医院药学杂志 2005年第7期25卷 587-590页

作者：彭小丽白小红原红霞山西医科大学药学院山西太原030001

目的:以中性红(NR)作为光谱探针,竞争光度法研究β环糊精(βCD)、羟丙基β环糊精(HPβCD)、甲基β环糊精(DMβCD),在pH7.6的缓冲液中,对左氧氟沙星(LVFX)、氧氟沙星(OFLX)客体分子的识别和LVFX的含量测定。方法:光谱探针竞争光度法。结... 详细信息

目的:以中性红(NR)作为光谱探针,竞争光度法研究β环糊精(βCD)、羟丙基β环糊精(HPβCD)、甲基β环糊精(DMβCD),在pH7.6的缓冲液中,对左氧氟沙星(LVFX)、氧氟沙星(OFLX)客体分子的识别和LVFX的含量测定。方法:光谱探针竞争光度法。结果:测定了β环糊精及其衍生物与LVFX和OFLX的包合常数;在λ=446nm处,LVFX的甲基β环糊精溶液在0.14～2.12g·L-1浓度范围内与吸收度呈良好的线性关系,r=-0.9952(n=5);平均回收率为(98.4±2.3)%。结论:β环糊精及其衍生物与LVFX和OFLX具有较强的手性识别能力,并且该法可用于LVFX含量的测定。

关键词： β-环糊精中性红氧氟沙星竞争光度法

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Influence of thermomechanical treatment on recrystallization and softening resistance of Cu-6.5Fe-0.3Mg alloy

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Transactions of Nonferrous Metals Society of China 2024年第9期34卷 2900-2917页

作者： Zhen-xia LIU Da-wei YUAN Xin LUO Lan-hao WANG Jin-shui CHEN Hui-ming CHEN xiang-peng xiao Bin YANG College of Advanced Copper Industry Jiangxi University of Science and TechnologyYingtan 335000China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China

The recrystallization and softening resistance of a Cu-6.5Fe-0.3Mg(mass fraction,%)alloy prepared by Process 1(cold rolling heat treatment)and Process 2(hot/cold rolling heat treatment)were studied using Vickers hardness tests,tensile tests,scanning electron microscopy and transmission electron *** softening temperature,hardness and tensile strength of the alloy prepared by Process 2 were 110°C,HV 15 and 114 MPa higher,respectively,than those of the alloy prepared by Process 1 after aging at 300°*** recrystallization activation energy of the alloys prepared by Process 1 and Process 2 were 72.83 and 98.11 kJ/mol,*** pinning effects of the precipitates of the two alloys on grain boundaries and dislocations were basically the *** softening mechanism was mainly attributed to the loss of dislocation *** higher Fe fiber density inhibited the average free migration path of dislocations and grain boundary migration in the alloy,which was the main reason for higher softening temperature of the alloy prepared by Process 2.

关键词： Cu−6.5Fe−0.3Mg alloy hot rolling recrystallization activation energy softening mechanism dislocation strengthening

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Effect of Electromagnetic Stirring on Fine Grain Formation and Tensile Property Improvement for Fe-Ni Superalloy

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Journal of Iron and Steel Research International 2012年第S1期19卷 369-372页

作者： JIA peng LU Hui ZUO xiao-wei WANG En-gang HE Ji-cheng Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern University

Due to its excellent creep rupture strength and low cost,superalloy GH2984 has becoming a promising material to be used as heat exchanger in the prospective 700 oC fossil power *** mechanical strength,which is a particularly important indicator for the superalloy,strongly depends on the grain size and crabide *** current study,we have investigated the influence of a rotating magnetic field(RMF)on the solidified microstructures and tensile properties of superalloy *** has been applied to provide a forced convection within the solidifying *** melt stirring by a sufficiently high magnetic field provides homogeneous grain size and elements distribution in the sample ***,yield strength is found to be effectively enhanced for the sample solidified under magnetic *** result has demonstrated that the RMF method on the melt solidification process shows a promising perspective for refining the grains and promoting the mechanical strength of superalloy GH2984.

关键词： Superalloy rotating magnetic field grain refinement tensile property

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SiC_w/Si_3N_4复合陶瓷的制备及介电性能的研究

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稀有金属材料与工程 2017年第4期46卷 1061-1066页

作者：肖伟玲肖鹏周伟罗衡中南大学粉末冶金国家重点实验室湖南长沙410083 航天科工武汉磁电有限责任公司湖北武汉430080

采用凝胶注模成型工艺制备了SiC_w/Si_3N_4复合陶瓷,由扫描电镜(SEM)可以看出,随热处理温度升高,碳化硅晶须的长径比逐渐减小;随烧结温度升高,复合陶瓷开孔率降低,密度随晶须含量的增加而增加。研究表明,SiC_w/Si_3N_4复合陶瓷的介电常... 详细信息

采用凝胶注模成型工艺制备了SiC_w/Si_3N_4复合陶瓷,由扫描电镜(SEM)可以看出,随热处理温度升高,碳化硅晶须的长径比逐渐减小;随烧结温度升高,复合陶瓷开孔率降低,密度随晶须含量的增加而增加。研究表明,SiC_w/Si_3N_4复合陶瓷的介电常数实部和虚部随碳化硅晶须含量的增加而升高,当烧结温度为1600℃,晶须含量从5%增加到15%时,8 GHz时介电常数实部从13.4增加到22.8,虚部从0.67增加到4.86;当烧结温度为1750℃时,8 GHz时介电常数实部从9.2增加到21.7,虚部从0.51增加到3.02。由反射率曲线可以看出,烧结温度为1750℃比1600℃时反射衰减随晶须含量的增加向低频移动的更快,频宽更宽。

关键词： SiCw Si3N4 复合陶瓷凝胶注模成型介电性能

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云环境中基于弹性预留机制的虚拟资源供给策略

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系统工程理论与实践 2015年第6期35卷 1573-1581页

作者：屈喜龙肖鹏白泉湖南工程学院计算机与通信系湘潭411104 华南理工大学计算机科学与工程学院广州510641

针对云计算环境中资源过度供给的问题,提出一种基于弹性预留机制的虚拟机供给策略.该策略在按需供给的基础上引入弹性预留机制,通过分析用户预留请求的统计特征,允许系统在一定条件下接纳用户的超额预留请求,从而在保证用户满意度的前... 详细信息

针对云计算环境中资源过度供给的问题,提出一种基于弹性预留机制的虚拟机供给策略.该策略在按需供给的基础上引入弹性预留机制,通过分析用户预留请求的统计特征,允许系统在一定条件下接纳用户的超额预留请求,从而在保证用户满意度的前提下提高云系统的资源有效利用率.理论分析给出了弹性预留机制的概率计算方法,实验分析则验证了所提资源供给策略的有效性以及关键策略参数对系统性能的影响.实验结果显示,与已有虚拟资源供给策略相比,本文所提策略能够有效提高云系统中的资源有效利用率,同时降低过度预留所导致的短期资源供给不足问题.

关键词：云计算虚拟机弹性预留资源供给

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Analysis of the Relationship between PI3K/Akt Signaling Pathway and Insomnia of Liver Depression Syndrome

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Precision Medicine Research 2019年第2期1卷 32-36页

作者： Yun-Qiao Wang Meng xia xiao Jiang Guangxi University of Chinese Medicine Nanning 530299China

Some studies have shown that the co-morbidity of insomnia and anxiety and depression is very prominent, among which 70% of anxiety patients are accompanied by sleep disorders, which is commonly referred to as insomnia of liver depression syndrome in traditional Chinese medicine. The etiology and pathogenesis of traditional Chinese medicine is liver-qi discomfort, and soothing liver and relieving depression should be taken as the basic treatment method and treatment principle. By sorting out the relevant literature on PI3K/Akt signaling pathway, the relationship between PI3K/Akt signaling pathway and depression and insomnia was sorted out, and the possible mechanism of Liver-soothing and Depression-Relieving therapy for insomnia of liver-depression syndrome was found.

关键词： Liver depression Insomnia PI3K/Akt signaling pathway

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Treatment of Ankle Sprain by Intradermal Acupuncture and Magnetic Therapy in 34 Cases

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Journal of Acupuncture and Tuina Science 2003年第3期1卷 51-52页

作者： WANG Hong-bin peng xiao-ping xiao Yuan-chun Shangluo District Hospital Shaanxi 726000 China Shangluo District Hospital Shaanxi 726000 China

Treatment of 34 cases of Simple ankle sprain mainly by Ashi point and in cooperation with magnetic therapy, and Qiuxu (GB40), Shenmai(BL62), Jinmen (BL 63) and Pucan (BL 61) were added in the presence of strephenopodia sprain, Zhaohai (KI 6), Shuiquan (KI 5) and Taixi (KI 3) were added in the presence of strephexopodia sprain, the effective rate was 91.7%. Key Words Acupuncture-Moxibustion - Electromangetic Acupuncture - Ankle Joint - Sprains Author: Wang Hong-bin (1971-), male, acupuncturistTranslator: xiao Yuan-chun

关键词： Acupuncture-Moxibustion Electromangetic Acupuncture Ankle Joint Sprains

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Understanding paraquat resistance mechanisms in Arabidopsis thaliana to facilitate the development of paraquat-resistant crops

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Plant Communications 2022年第3期3卷 30-40页

作者： Tahmina Nazish Yi-Jie Huang Jing Zhang Jin-Qiu xia Alamin Alfatih Chao Luo xiao-Teng Cai Jing Xi Ping Xu Cheng-Bin xiang Division of Life Sciences and Medicine Division of Molecular&Cell BiophysicsHefei National Science Center for Physical Sciences at the MicroscaleMOE Key Laboratory for Membraneless Organelles and Cellular DynamicsUniversity of Science and Technology of ChinaThe Innovation Academy of Seed DesignChinese Academy of SciencesHefeiAnhui Province 230027China Shanghai Key Laboratory of Plant Functional Genomics and Resources Shanghai Chenshan Botanical GardenShanghai201602China Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjingJiangsu Province 210037China Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing University of AgricultureBeijing 102206China These authors contributed equally Present address:Natural Products Utilization Research USDA-ARSUniversityMS 38677USA

Paraquat(PQ)is the third most used broad-spectrum nonselective herbicide around the globe after glyphosate and *** usage and overreliance on this herbicide have resulted in the emergence of PQ-resistant weeds that are a potential hazard to *** is generally believed that PQ resistance in weeds is due to increased sequestration of the herbicide and its decreased translocation to the target site,as well as an enhanced ability to scavenge reactive oxygen ***,little is known about the genetic bases and molecular mechanisms of PQ resistance in weeds,and hence no PQ-resistant crops have been developed to *** genetics of the model plant Arabidopsis thaliana has advanced our understanding of the molecular mechanisms of PQ *** review focuses on PQ resistance loci and resistance mechanisms revealed in Arabidopsis and examines the possibility of developing PQ-resistant crops using the elucidated mechanisms.

关键词： herbicide paraquat paraquat resistance Arabidopsis thaliana weed

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