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Highly efficient production of 2,5-dihydroxymethylfuran from biomass-derived 5-hydroxymethylfurfural over an amorphous and mesoporous zirconium phosphonate catalyst

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Journal of Energy Chemistry 2019年第10期28卷 82-92页

作者： Lei Hu Ning Li Xiaoli Dai Yuqi Guo Yetao Jiang aiyong he Jiaxing Xu Jiangsu Key Laboratory for Biomass-Based Energy and Enzyme Technology Jiangsu Collaborative Innovation Center of Regional Modern Agriculture &Environmental Protection School of Chemistry and Chemical Engineering Huaiyin Normal University

The development of high-efficiency and low-cost catalysts is very crucial for the MeerweinPonndorf-Verley (MPV) reduction of biomass-derived 5-hydroxymethylfurfural (HMF) into 2,5-dihydroxymethylfuran (DHMF). In this work, an amorphous and mesoporous zirconium phosphonate catalyst (Zr-DTMP), which is a zirconium-containing organic-inorganic nanohybrid, was successfully designed and synthesized by the simple assembly of zirconium tetrachloride (ZrCl4) and diethylene triaminepenta(methylene phosphonic acid)(DTMP). Satisfactorily, when Zr-DTMP was employed for the MPV reduction of HMF in the presence of 2-butanol (secBuOH), DHMF yield could be achieved as 96.5% in 3 h under a relatively mild reaction temperature of 140℃. Systematic investigations indicated that this high catalytic activity should be mainly due to the cooperative role of enhancive Lewis acid site (Zr4+) and Lewis base site (O2-) in activating the carbonyl group of HMF and dissociating the hydroxyl group of secBuOH, respectively. Additionally, Zr-DTMP showed excellent catalytic stability, when it was successively used 5 recycles, its surface characteristics and textural properties still remained almost unchanged, and so, the catalytic activity was not obviously affected. More interestingly, Zr-DTMP could also be applied for the selective reduction of other biomass-derived carbonyl compounds, such as 5-methylfurfural (MF), furfural (FF), levulinic acid (LA), ethyl levulinate (EL) and cyclohexanone (CHN), into the corresponding products with high yields, which is beneficial to the effective synthesis of various valuable bio-based chemicals.

关键词： 5-Hydroxymethylfurfural 2,5-Dihydroxymethylfuran 2-Butanol Zirconium phosphonate catalyst Meerwein-Ponndorf-Verley reduction

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Posterior dislocation of the shoulder with a fracture of the humeral anatomical neck:a case report and concise review of the literature

Posterior dislocation of the shoulder with a fracture of the...

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中华医学会第10届全国显微外科学术会议暨世界首例断肢再植成功50周年庆典

作者： Jiangdong Ni Jianwei Wei Biao Wang Zhonggen Dong Lihong Liu aiyong he Department of Orthopedics the Second Xiangya HospitalCentral South University

The posterior dislocation of the shoulder with a displaced fracture of the humeral anatomical neck is rare. here we reported a case that a man suffered from the posterior dislocation of the shoulder with a displaced fracture of the humeral anatomical *** admission to the emergency department,he was physically examined and received anteroposterior radiological examination;however,the lateral and axial radiological

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Pipkin骨折17例外科手术疗效

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中南大学学报（医学版） 2019年第12期44卷 1391-1396页

作者：肖波曹志远何爱咏中南大学湘雅二医院骨科

目的:探讨髋关节脱位合并股骨头骨折(Pipkin骨折)手术治疗的效果。方法:回顾性分析17例Pipkin骨折患者外科治疗的临床资料,受伤至手术时间1~30(平均9.5) d。按Pipkin分型,Ⅰ型4例,Ⅱ型6例,Ⅲ型1例,Ⅳ型6例。13例入院后予以皮牵引或骨牵... 详细信息

目的:探讨髋关节脱位合并股骨头骨折(Pipkin骨折)手术治疗的效果。方法:回顾性分析17例Pipkin骨折患者外科治疗的临床资料,受伤至手术时间1~30(平均9.5) d。按Pipkin分型,Ⅰ型4例,Ⅱ型6例,Ⅲ型1例,Ⅳ型6例。13例入院后予以皮牵引或骨牵引,术后持续牵引4周。结果:17例患者的随访时间为8~84(平均43)个月。所有患者无伤口感染、皮瓣坏死及内植物松动、断裂等。随访时按照Thompson-Epstein评价系统评价关节功能,Ⅰ型中优3例,可1例;Ⅱ型中获优3例,良2例,差1例;Ⅲ型1例为良;Ⅳ型中获2例,良2例,可2例;优良率为76.47%。结论:Pipkin骨折早期诊断并根据Pipkin分型合理选择手术入路及内固定方式,有助于患者获得满意的髋关节功能并改善预后。

关键词：髋关节后脱位合并股骨头骨折 Pipkin分型 Thompson-Epstein评价系统疗效

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bFGF与VEGF复合磷酸钙骨水泥修复兔桡骨缺损的实验研究

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中南大学学报（医学版） 2010年第6期35卷 622-629页

作者：谢求恩何爱咏宋坤修中南大学湘雅二医院骨科长沙410011

目的:探讨碱性成纤维细胞生长因子(bFGF)与血管内皮生长因子(VEGF)促进骨生长是否具有协同作用。方法:36只家兔的双侧桡骨均建立1.0cm的骨缺损实验模型后随机分为A,B,C,D组。其中A组为对照组,于骨缺损部位植入单纯磷酸钙骨水泥(CPC);B... 详细信息

目的:探讨碱性成纤维细胞生长因子(bFGF)与血管内皮生长因子(VEGF)促进骨生长是否具有协同作用。方法:36只家兔的双侧桡骨均建立1.0cm的骨缺损实验模型后随机分为A,B,C,D组。其中A组为对照组,于骨缺损部位植入单纯磷酸钙骨水泥(CPC);B组植入复合bFGF的CPC,C组植入复合VEGF的CPC,D组植入联合应用bFGF和VEGF的CPC。分别于术后3,6,12周切取标本,通过X线摄片、骨密度测量、生物力学测试、组织形态学观察等手段,观察各个时期新骨形成的情况。结果:X线摄片显示12周时D组骨缺损完全修复,材料基本降解;B,C组骨缺损基本修复。骨密度测量显示术后12周时D组骨密度明显高于B,C两组(P<0.05)。生物力学测试(12周时)显示D组最大抗折载荷明显高于B,C两组(P<0.05)。组织形态学观察显示12周时,编织骨改建为成熟的板层骨,D组中皮质骨和髓腔的正常关系以及骨小梁正常的排列结构重新恢复,B和C组则未见骨髓腔再通。结论:CPC/bFGF,CPC/VEGF和CPC/bFGF+VEGF3组复合物均能促进骨组织生长及加速骨缺损的修复;CPC/bFGF+VEGF复合物促进骨组织生长的能力明显优于CPC/bFGF和CPC/VEGF复合物,说明bF-GF与VEGF促进骨生长具有协同作用。

关键词：磷酸钙骨水泥碱性成纤维细胞生长因子血管内皮生长因子骨缺损修复

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Honeycomb-like biochar framework coupled with Fe_(3)O_(4)/FeS nanoparticles as efficient heterogeneous Fenton catalyst for phenol degradation

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Journal of Environmental Sciences 2024年第2期136卷 390-399页

作者： Aihua Cheng Yi he Xiaohe Liu Chi he Department of Environmental Engineering College of Geology and EnvironmentXi’an University of Science and TechnologyXi’an 710054China State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China National Engineering Laboratory for VOCs Pollution Control Material and Technology University of Chinese Academy of SciencesBeijing 101408China

Achieving an efficient and stable heterogeneous Fenton reaction over a wide pH range is of great significance for wastewater ***,a pollen-derived biochar catalyst with a unique honeycomb-like structure,coupled with the dispersion of magnetic Fe_(3)O_(4)/FeS(Fe/S)nanoparticles,was synthesized by simple impregnation precursor,followed by *** prepared Fe/S-biochar catalyst demonstrated outstanding phenol degradation efficiency across a wide pH range,with 98%of which eliminated even under neutral conditions(pH 7.0).The high catalytic activity was due to the multilevel porous structure of pollenderived biochar provided enough active sites and allowed for better electron transfer,then increases oxidation ability to promote the ***,the acid microenvironment formed by SO_(4)^(2-)group from Fe/S composite extended the pH range for Fenton reaction,and S^(2-)facilitated the conversion of≡Fe^(3+)to≡Fe^(2+),resulting in remarkable degradation ***,biochar can effectively promote cycling stability by limiting Fe *** work may provide a general strategy for designing 3D framework biochar-based Fe/S catalysts with excellent performance for heterogeneous Fenton reactions.

关键词： Biomass Biochar Fenton reaction Fe_(3)O_(4)/FeS(Fe/S) Phenol degradation

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H-and J-aggregation of conjugated small molecules in organic solar cells

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Journal of Energy Chemistry 2024年第6期93卷 174-192,I0005页

作者： Qiaoqiao Zhao Feng he State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353ShangdongChina Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and TechnologyShenzhen 518055GuangdongChina Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and TechnologyShenzhen 518055GuangdongChina

As H-and J-aggregation receive more and more attention in the research of organic solar cells(OSCs),especially in small molecular systems,deep understanding of aggregation behavior is needed to guide the design of conjugated small molecular structure and the fabrication process of OSC *** this end,this review is ***,the review firstly introduced the basic information about H-and J-aggregation of conjugated small molecules in ***,the characteristics of H-and J-aggregation and the methods to identify them were ***,it reviewed the research progress of H-and J-aggregation of conjugated small molecules in OSCs,including the factors influencing H-and J-aggregation in thin film and the effects of H-and J-aggregation on OPV performance.

关键词： H-aggregation J-aggregation Organic solar cells Small molecules Efficiency Stability

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A theory for three-dimensional response of micropolar plates

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1403-1414页

作者： Dianwu HUANG Linghui he College of Civil Engineering and Architectural Jiaxing UniversityJiaxing 314001Zhejiang ProvinceChina Department of Modern Mechanics and State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026China

Through combined applications of the transfer-matrix method and asymptotic expansion technique,we formulate a theory to predict the three-dimensional response of micropolar *** ad hoc assumptions regarding through-thickness assumptions of the field variables are made,and the governing equations are two-dimensional,with the displacements and microrotations of the mid-plane as the *** the deformation of the mid-plane is solved,a three-dimensional micropolar elastic field within the plate is generated,which is exact up to the second order except in the boundary region close to the plate *** an illustrative example,the bending of a clamped infinitely long plate caused by a uniformly distributed transverse force is analyzed and discussed in detail.

关键词： micropolar plate transfer-matrix asymptotic expansion three-dimensional response

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Distributed Optimal Variational GNE Seeking in Merely Monotone Games

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1621-1630页

作者： Wangli he Yanzhen Wang IEEE the Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China

In this paper, the optimal variational generalized Nash equilibrium(v-GNE) seeking problem in merely monotone games with linearly coupled cost functions is investigated, in which the feasible strategy domain of each agent is coupled through an affine constraint. A distributed algorithm based on the hybrid steepest descent method is first proposed to seek the optimal v-GNE. Then, an accelerated algorithm with relaxation is proposed and analyzed, which has the potential to further improve the convergence speed to the optimal v-GNE. Some sufficient conditions in both algorithms are obtained to ensure the global convergence towards the optimal v-GNE. To illustrate the performance of the algorithms, numerical simulation is conducted based on a networked Nash-Cournot game with bounded market capacities.

关键词： Distributed algorithms equilibria selection generalized Nash equilibrium(GNE) merely monotone games

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Distributed Nash Equilibrium Seeking on Compact Action Sets over Jointly Strongly Connected Switching Networks

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Journal of Systems Science & Complexity 2024年第1期37卷 63-81页

作者： he Xiongnan HUANG Jie Department of Mechanical and Automation Engineering The Chinese University of Hong KongHong Kong 999077China.

This paper studies the distributed Nash equilibrium seeking(DNES)problem for games whose action sets are compact and whose network graph is switching satisfying the jointly strongly connected *** keep the actions of all players in their action sets all the time,one has to resort to the projected gradient-based *** the assumption that the unique Nash equilibrium is the unique equilibrium of the pseudogradient system,an algorithm is proposed that is able to exponentially find the Nash ***,the authors also consider the distributed Nash equilibrium seeking problem for games whose actions are governed by high-order integrator dynamics and belong to some compact *** examples are used to illustrate the proposed approach.

关键词： Compact action sets jointly strongly connected switching graphs Nash equilibrium seeking projected gradient-based algorithm.

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High-Order Two-Scale Asymptotic Paradigm for the Elastodynamic Homogenization of Periodic Composites

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Acta Mechanica Solida Sinica 2024年第1期37卷 124-138页

作者： Wei-Zhi Luo Mu he Liang Xia Qi-Chang he State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Laboratoire Modélisation et Simulation Multi-Echelle MSME UMR 8208 CNRSUniversite Gustave Eiffel77454 Marne-la-ValléeFrance

The classical two-scale asymptotic paradigm provides macroscopic and microscopic analyses for the elastodynamic homogenization of periodic composites based on the spatial or/and temporal variable,which offers an approximate framework for the asymptotic homogenization analysis of the motion ***,in this framework,the growing complexity of the homogenization formulation gradually becomes an obstacle as the asymptotic order *** such a context,a compact,fast,and accurate asymptotic paradigm is *** work reviews the high-order spatial two-scale asymptotic paradigm with the effective displacement field representation and optimizes the implementation by symmetrizing the tensor to be ***,the modified implementation gets rid of the excessive memory consumption required for computing the high-order tensor,which is demonstrated by representative one-and two-dimensional *** numerical results show that(1)the contrast of the material parameters between media in composites directly affects the convergence rate of the asymptotic results for the homogenization of periodic composites,(2)the convergence error of the asymptotic results mainly comes from the truncation error of the modified asymptotic homogenized motion equation,and(3)the excessive norm of the normalized wavenumber vector in the two-dimensional inclusion case may lead to a non-convergence of the asymptotic results.

关键词： Composites Homogenization Asymptotic analysis Dynamics Dispersion

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