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Copper（II） Complexes Based on 4＇-R-Terpyridine： Synthesis, Structures, and Photocatalytic Properties

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Chemical Research in Chinese Universities 2017年第1期33卷 1-6页

作者： yan xia ZHANG JiarLxin School of Environmental and Chemical Engineering Tianjin Polytechnic University Tianjin 300387 P. tL China

Complexes Cu（II）（4＇-R-terpyridine）2（C104）2[R=2-thienyl（1）, 2-（5-bromothienyl）（2）, 2-（5-methyl- thienyl）（3） and 2-（5-methoxythienyl）（4）] were synthesized, and their structures were determined by single-crystal X-ray diffraction analyses and were further characterized by high resolution mass spectrometry, infrared spectrosco- py（m）, as well as elemental analysis. Single crystal X-ray diffraction analysis shows that Cu（II） ions in the complexes are both six-coordinated with N6 coordination sphere, displaying distorted octahedral geometries. In addition, the UV-Vis absorption spectra show that the four complexes all exhibit absorption components in both UV and visible light regions. Thus, the photocatalytic activities of the four complexes in the degradation of organic dyes were investigated.

关键词： Copper(ll) complex Single crystal structure Photocatalytic property

Recent advances in electrochemical synthesis of urea via C-N coupling

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Journal of Energy Chemistry 2024年第11期98卷 294-310页

作者： Chen Wang Wenqi gao Wei Hu Wei Wen Shengfu Wang Xiuhua Zhang Dafeng yan Bao Yu xia Hubei Key Laboratory for Precision Synthesis of Small Molecule Pharmaceuticals&Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules&College of Chemistry and Chemical Engineering Hubei UniversityWuhan 430062HubeiChina School of Chemistry and Chemical Engineering State Key Laboratory of Materials Processing and Die&Mould TechnologyKey Laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education)Hubei Key Laboratory of Material Chemistry and Service FailureWuhan National Laboratory for OptoelectronicsHuazhong University of Science and Technology(HUST)Wuhan 430074HubeiChina

Urea is widely used as fertilizer and is a key substance supporting global food production. However, the traditional industrial synthesis of urea faces the challenges with high energy consumption and serious environmental problems. With the increasing global demand for environmental protection and sustainable development, it is much necessary to develop novel and clean methods for the synthesis of *** provides an efficient and renewable synthesis route that can directly produce urea at room temperature and atmospheric pressure by the coupling of CO_(2) and nitrogenous molecules. In this review, we summarized the most recent advances in electrochemical synthesis of urea via CAN coupling systematically, focusing on the coupling of CO_(2) and different nitrogen sources. And the associated coupling mechanism, catalysts optimization, and electrolyzer design are well discussed. Moreover, the challenges and future directions for electrocatalytic CAN coupling are prospected. This review will provide timely and valuable guidance for others and attract more interests to promote the development of electrochemical synthesis of urea or other valuable chemicals containing CAN bond.

关键词： Electrocatalysis CAN coupling Urea synthesis CO_(2)and N_(2)fixation

Improved blending strategy for membrane modification virtue of surface segregation using surface-tailored amphiphilic nanoparticles

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Frontiers of Environmental Science & Engineering 2016年第6期10卷 113-121页

作者： Shuai Liang Peng gao xiaoqi gao Kang xiao xia Huang College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China College of Resources and Environment University of Chinese Academy of Sciences Beijing 100049 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

Membrane modification is one of the most feasible and effective solutions to membrane fouling proble.m which tenaciousl.y hampers .the furher au .gmentation of me .rnbrane *** *** modification with nanoparticles （NPs）, owing to the convenience of being incorporated in established ***. ction lines, possesses an advantag, eous viability in practical ***, the existing blending strategy suffers from a low utilization efficiency due to NP encasement by membrane matrix. The current study proposed an improved blending modification approach with amphiphilic NPs （aNPs）, which were prepared through silanization using 3-（Trimethoxysilyl）propyl methacrylate （TMSPMA） as coupling agents and ZnO or SiO2 as pristine NPs （pNPs）, *** Fourier transform infrared and X-ray photoelectron spectroscopy analyses revealed thepresence of appropriate organic components in both the ZnO and SiO2 aNPs, which verified the success of the silanization process. As compared with the pristine and conventional pNP-blended membranes, both the ZnO aNP-blended and SiO2 aNP-blended membranes with proper silanization （100% and 200% w/w） achieved a significantly increased blending efficiency with more NPs scattenng on the internal and external membrane surfaces under scanning electron microscope observation. This improvement contributed to the increase of membrane hydrophilicity. Nevertheless, an extra dosage of the TMSPMA led to an encasement of NPs, thereby adversely affecting the properties of the resultant membranes. On the basis of all the tests, 100% （w/w） was selected as the optimum TMSPMA dosage for blending modification for both the ZnO and SiO2 types.

关键词： Membrane modification Nanoparticle Hydrophilic Amphiphilic Blending

Error-detected N-photon cluster state generation based on the controlled-phase gate using a quantum dot in an optical microcavity

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Frontiers of physics 2020年第2期15卷 1-11页

作者： Lei-xia Liang yan-yan Zheng Yuan-xia Zhang Mei Zhang Department of Physics Applied Optics Beijing Area Major LaboratoryBeijing Normal UniversityBeijing 100875China School of Physics and Electronic Information Yan’an UniversityYan’an 716000China

We propose a scheme for error-detected generation of an AT-photon cluster state with a quantum dot(QD)embedded in a single-sided optical niicrocavity(QD-cavity system).The basic structure of this scheme is an error-detected controlled-phase(C-phase)gate on the hybrid electron-photon *** this scheme,the fidelity of N-photon cluster state generation can be reached imity even if low-Q cavity and cavity leakage are *** using error detecting,the generation of an AT-photon cluster state can be performed by repeating until success,which also leads to a high success probability,compared with other schemes assisted by the QD-cavity *** error-detected generation of an N-photon cluster state in the highly controllable way may benefit on the quantum network in the future.

关键词： controlled-phase gate cluster state error-detected QD-cavity system

Empirical Likelihood for Partially Linear Errors-in-variables Models with Longitudinal Data

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Acta Mathematicae Applicatae Sinica 2022年第3期38卷 664-683页

作者： Li yan xiao-yan TAN xia CHEN School of Mathematics and Statistics Shaanxi Normal UniversityXi’an 710119China

Empirical likelihood inference for partially linear errors-in-variables models with longitudinal data is *** regularity conditions,it is shown that the empirical log-likelihood ratio at the true parameters converges to the standard Chi-squared ***,we consider some estimates of the unknown parameter and the resulting estimators are shown to be asymptotically *** simulations and a real data analysis are given to illustrate the performance of the proposed method.

关键词： empirical likelihood measurement error confidence regions coverage probability longitudinal data

Approximate subgradient projection algorithm for convex feasibility problem

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Journal of Systems Engineering and Electronics 2010年第3期21卷 527-530页

作者： Li Li yan gao Business School University of Shanghai for Science and Technology Shanghai 200093 P. R. China

An ε-subgradient projection algorithm for solving a convex feasibility problem is *** on the iterative projection methods and the notion of ε-subgradient,a series of special projection hyperplanes is ***,compared with the existing projection hyperplanes methods with subgradient,the proposed hyperplanes are interactive with ε,and their ranges are more *** convergence of the proposed algorithm is given under some mild conditions,and the validity of the algorithm is proved by the numerical test.

关键词： ε-subgradient projection algorithm convex feasibility problem.

Contralateral needling at unblocked collaterals for hemiplegia following acute ischemic stroke

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Neural Regeneration Research 2013年第31期8卷 2914-2922页

作者： Huanmin gao Xugang Li xia gao Benxu Ma Department of Neurology People’s Hospital of Ningxia Hui Autonomous Region Department of Intensive Care Unit People's Hospital of Rizhao City Department of Rehabilitation the Second Affiliated Hospital of Qingdao University Medical College

Hemiplegia caused by stroke indicates dysfunction of the network between the brain and limbs, namely collateral shock in the brain. Contralateral needling is the insertion of needles into acupoints on the relative healthy side of the body to treat diseases such as apoplexy. However, there is little well-designed and controlled clinical evidence for this practice. This study investigated whether contralateral needling could treat hemiplegia after acute ischemic stroke in 106 randomly selected patients with acute ischemic stroke. These patients were randomly assigned to three groups： 45 in the contralateral needling group, receiving acupuncture on the unaffected limbs; 45 in the conven- tional acupuncture group, receiving acupuncture on the hemiplegic limbs; and 16 in the control group, receiving routine treatments without acupuncture. Acupuncture at acupoints Chize （LU5） in the upper limb and Jianliao （TEl4） in the lower limb was performed for 45 minutes daily for 30 consecutive days. The therapeutic effective rate, Neurological Deficit Score, Modified Barthel Index and FugI-Meyer Assessment were evaluated. The therapeutic effective rate of contralateral nee- dling was higher than that of conventional acupuncture （46.67% vs. 31.11%, P 〈 0.05）. The neuro- logical deficit score of contralateral needling was significantly decreased compared with conven- tional acupuncture （P 〈 0.01）. The Modified Barthel Index and FugI-Meyer Assessment score of contralateral needling increased more significantly than those of conventional acupuncture （both P 〈 0.01）. The present findings suggest that contralateral needling unblocks collaterals and might be more effective than conventional acupuncture in the treatment of hemiplegia following acute ischemic stroke.

关键词： neural regeneration acupuncture stroke hemiplegia collateral neurological function cerebralischemia grants-supported paper neuroregeneration

Sample size adaptive strategy for time-dependent Monte Carlo particle transport simulation

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Nuclear Science and Techniques 2023年第4期34卷 127-134页

作者： Dan-Hua ShangGuan Wei-Hua yan Jun-xia Wei Zhi-Ming gao Yi-Bing Chen Zhi-Cheng Ji Institute of Applied Physics and Computational Mathematics Beijing 100094China

When multiphysics coupling calculations contain time-dependent Monte Carlo particle transport simulations, these simulations often account for the largest part of the calculation time, which is insufferable in certain important cases. This study proposes an adaptive strategy for automatically adjusting the sample size to fulfil more reasonable simulations. This is realized based on an extension of the Shannon entropy concept and is essentially different from the popular methods in timeindependent Monte Carlo particle transport simulations, such as controlling the sample size according to the relative error of a target tally or by experience. The results of the two models show that this strategy can yield almost similar results while significantly reducing the calculation time. Considering the efficiency, the sample size should not be increased blindly if the efficiency cannot be enhanced further. The strategy proposed herein satisfies this requirement.

关键词： Time-dependent Monte Carlo particle transport simulation Shannon entropy Adaptive strategy

Self-Assembled Nanomicelles of Affibody-Drug Conjugate with Excellent Therapeutic Property to Cure Ovary and Breast Cancers

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Nano-Micro Letters 2022年第2期14卷 190-205页

作者： Xuelin xia xiaoyuan yang Wei Huang xiaoxia xia Deyue yan School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China State Key Laboratory of Microbial Metabolism School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Affibody molecules are small nonimmunoglobulin affinity proteins,which can precisely target to some cancer cells with specific overexpressed molecular ***,the relatively short in vivo half-life of them seriously limited their application in drug targeted delivery for cancer *** an amphiphilic affibody-drug conjugate is self-assembled into nanomicelles to prolong circulation time for targeted cancer *** an example of the concept,the nanoagent was prepared through molecular self-assembly of the amphiphilic conjugate of Z_(HHR2:342)-Cys with auristatin E derivate,where the affibody used is capable of binding to the human epidermal growth factor receptor 2(HER2).Such a nanodrug not only increased the blood circulation time,but also enhanced the tumor targeting capacity(abundant affibody arms on the nanoagent surface) and the drug accumulation in *** a result,this affibody-based nanoagent showed excellent antitumor activity in vivo to HER2-positive ovary and breast tumor models,which nearly eradicated both small solid tumors(about 100 mm^(3)) and large established tumors(exceed 500 mm^(3)).The relative tumor proliferation inhibition ratio reaches 99.8% for both models.

关键词： Molecular self-assembly Affibody-drug conjugate Nanoagent Targeted cancer therapy