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Rh(Ⅱ) and Zn(Ⅱ) co-catalyzed multi-component reaction for the synthesis of vicinal diols

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Chinese Chemical Letters 2009年第11期20卷 1299-1302页

作者： xu Zhang Xin Guo Li Ping Yang wen hao Hu Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu 610041 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China Department of Chemistry East China Normal University Shanghai 200062 China

Oxonium ylide intermediates generated from α-diazocarbonyl compounds and water were trapped by Zn（Ⅱ）-activated α- dicarbonyl compounds. The reaction gave α,β-dihydroxyl acid derivatives in moderate yield.

关键词： Multi-component reaction α-Diazocarbonyl compounds Zn(OTf)2 α-Dicarbonyl compounds

A fluorescent guest used to determinate the effective content of CB[8] and to further detect methyl viologen

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Chinese Chemical Letters 2013年第9期24卷 857-860页

作者： hao Chen Hui Yang wen-Chao xu Ye-Bang Tan Key Laboratory of Special Functional Aggregated Materials Ministry of Education Shandong University School of Chemistry and Chemical Engineering Shandong University

A fluorescent pyrene derivate, N-allyl-l-pyrenemethylammonium hydrochloride （APA＊）, was reported to form a stable host-guest complex with cucurbit[8]uril （CB[8]）, and this property can be utilized to determinate the purity of CB[8] via emission titration. Moreover, the 1：1 complex of APA and CB[8] can further bind methyl viologen （MV^2＋）, which is the main ingredient of a widely used herbicide, providing a good method to detect MV^2＋, especially at low concentrations.

关键词： Cucurbituril Supramolecular chemistry Fluorescence Host-guest chemistry

Direction-Dependent Switching in Nonlinear Chirped Gratings

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Chinese Physics Letters 1996年第4期13卷 285-288页

作者： LIU Jun-min LIAO Chang-jun LIU Song-hao xu wen-cheng Institute of Quantum Electronics South China Normal UniversityGuangzhou 510631

Chirped gratings with uniform Kerr nonlinearity are numerically demons traced to have direction-dependent switching behavior,which is caused by the different energy storage between the two incident *** effect can iind... 详细信息

关键词： Chirped optical Switching

Native conjugation between proteins and [60]fullerene derivatives using SpyTag as a reactive handle

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Chinese Chemical Letters 2021年第1期32卷 353-356页

作者： Guangzhong Yin Jingjing Wei Yu Shao wen-hao Wu Lianjie xu wen-Bin Zhang Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of the Ministry of EducationCollege of Chemistry and Molecular EngineeringCenter for Soft Matter Science and EngineeringPeking UniversityBeijing 100871China College of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000China

Herein,we report the facile conjugation between proteins and water-soluble [60]fullerene derivatives(DC_(60)) under native conditions using SpyTag as a reactive ***-soluble [60] fullerene derivatives were first prepared via sequential Bingel-Hirsch reaction and "clicked" with SpyTag to give DC_(60)-SpyTag for native conjugation with proteins by the highly efficient SpyTag-SpyCatcher *** bioconjugation was confirmed by MALDI-TOF MS spectra and SDS-PAGE *** TEM and UVvis spectroscopic study further revealed that the DC_(60) could alter the optical performance and induce aggregation of the target *** thus provides a general and robust method for modifying proteins with C_(60) derivatives and could potentially be adapted for native conjugation between proteins and other nonbiological motifs as well.

关键词： SpyTag Spy Catcher Fullerene Protein Bioconjugate

Graphene quantum dots modulated solution-derived InGaO thin-film transistors and stress stability exploration

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Rare Metals 2023年第7期42卷 2294-2306页

作者： Xiao-Fen xu Gang He Lei-Ni Wang wen-hao Wang Xiao-Yu Wu School of Materials Science and Engineering Anhui UniversityHefei230601China

Graphene quantum dots(GQDs)doped InGaO(IGO)thin film transistors(TFTs)have been fabricated based on solution-driven ZrO_(x) as gate *** to pure IGO TFTs,superior electrical performance of the GQDs-IGO TFTs can be achieved by adjusting the doping *** has been demonstrated that GQDs-modified IGO TFTs devices with GQDs doping content of0.3 mg·ml^(-1)have the optimized performances,including field-effect mobility(μ_(FE))of 22.02 cm^(2)·V^(-1)·s^(-1),on/off current ratio(I_(on)/I_(off))of 7.06×10^(7),subthreshold swing(SS)of 0.09 V·dec^(-1),hysteresis of 0.04 V and interfacial trap states(D_(it))of 1.03×10^(12)cm^(-2).In addition,bias stress and illumination stress tests have been performed and excellent stability has been achieved for optimized *** GQDs-IGO TFTs device showed smaller threshold voltage shift of 0.12 and 0.04 V under positive bias stress(PBS)test and negative bias stress(NBS)test for 3600 s,*** it showed smaller threshold voltage shift of 0.27 and 0.34 V for red light under the PBS and NBS test for 3600 s,***,it showed smaller threshold voltage shift of0.20 and 0.22 V for green light under PBS and NBS test for3600 s,*** also showed smaller threshold voltage shift of 0.17 and 0.12 V for blue under the positive bias illumination stress(PBIS)test and negative bias illumination stress(NBIS)test for 3600 s,*** noise(LFN)characteristics of GQDs-IGO/ZrO_(x)TFTs indicated that the noise source came from the fluctuations in ***,a low voltage resistor-loaded unipolar inverter has been built based on GQDs-IGO/ZrO_(x)TFT,demonstrating good dynamic response behavior and a maximum gain of *** experimental results have suggested that solution-processed GQDs-IGO/ZrO_(x)TFT may envision potential applications in low-cost and large-area electronics.

关键词： Graphene quantum dots doped InGaO(GQDs-IGO) Thin-film transistors Stability Inverter Low-frequency noise

Mechanism of a dual-phase Ti-Nb alloy exhibiting near-linear elastic deformation

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Rare Metals 2024年第5期43卷 2282-2289页

作者： Yan Guo Wang Ding wen Ma Shun Guo hao-Dong Meng Nian-Yao xu School of Automotive Engineering Changzhou Institute of TechnologyChangzhou 213032China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Youke Publishing Co. LtdChina Grinm Group Co.LtdBeijing 100088China

In this work,the underlying mechanism responsible for the near-linear elastic deformation behavior of a dual-phase Ti-Nb alloy consisting of β and α'' phase with large recoverable strain was systematically *** on in situ synchrotron X-ray diffraction(SXRD)analyses,it was found that besides intrinsic elastic deformation,a slight reversible β-α'' stress-induced martensitic(SIM)transformation,which proceeded in a consecutive mode under the retarding effect of micro-defects,took place during the near-linear elastic *** unloading,a small amount of residual macroscopic strain remained in the specimen due to the incomplete reverse α''→β transformation on *** high near-linear elastic deformability of the cold drawing(CD)Ti-Nb alloy has been revealed to be attributed to the coupling actions of intrinsic elasticity as well as the consecutive and reversible β-α'' SIM *** research may contribute to a new avenue for the design and development of novel dual-phase Ti-based alloys with desirable elastic deformability.

关键词： Titanium alloys Dual-phase Near-linear elastic deformation Martensitictransformation

Assessment of rehabilitation treatment for patients with acute poisoning-induced toxic encephalopathy

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World Journal of Emergency Medicine 2024年第6期15卷 441-447页

作者： hao Wu Yu Zhou Baogen xu wen Liu Jinquan Li Chuhan Zhou hao Sun Yu Zheng Department of Emergency and Critical Care Medicine Jiangsu Province Hospital/First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China The Key Laboratory of Modern Toxicology of Ministry of Education Nanjing Medical UniversityNanjing 210000China Department of Emergency Medicine Yancheng Clinical Medical CollegeNanjing Medical UniversityNanjing 211100China Drum Tower Clinical Medical College Nanjing Medical UniversityNanjing Drum Tower HospitalNanjing 210008China Institute of Poisoning Nanjing Medical UniversityNanjing 210000China Center for Rehabilitation Medicine Jiangsu Province Hospital/First Affiliated Hospital of Nanjing Medical UniversityNanjing 210000China

BACKGROUND:Poisoned patients often suffer damage to multiple systems,and those experiencing central nervous system disorders present more severe conditions,prolonged hospital stays,and increased mortality *** aimed to assess the efficacy of rehabilitation interventions for patients with toxic ***:This retrospective,observational,comparative cohort study was performed at the teaching hospital affiliated of Nanjing Medical University,from October 2020 to December *** who met the diagnostic criteria for toxic encephalopathy and exclusion criteria were included,and patients were divided into three subgroups according to Glasgow Coma Scale(GCS).Demographic and clinical characteristics were *** effect of the rehabilitation intervention on patients were assessed in the improvement of consciousness status(Glasgow Coma Scale[GCS]score),muscle strength and movement and swallowing function(Fugl-Meyer Assessment[FMA]scale,Water Swallow Test[WST],and Standardized Swallowing Assessment[SSA]).Subgroup analysis was based on different toxic ***:Out of the 464 patients with toxic encephalopathy,184 cases received rehabilitation *** the severe toxic encephalopathy patients,patients without rehabilitation intervention have a 2.21 times higher risk of death compared to patients with rehabilitation intervention(Hazard ratio[HR]=2.21).Subgroup analysis revealed that rehabilitation intervention significantly increased the survival rate of patients with pesticide poisoning(P=0.02),while no significant improvement was observed in patients with drug/biological agent poisoning(P=0.44).After rehabilitation intervention,significant improvement in GCS and FMA were observed in severe patients with toxic encephalopathy(P<0.01).CONCLUSION:Active rehabilitation intervention for patients exposed to poisons that can potentially cause toxic encephalopathy may improve the prognosis and reduce the mortality rate in clinical practice.

关键词： Toxic encephalopathy Poisoning Rehabilitation Efficacy

Robust resource allocation for NOMA-assisted heterogeneous networks

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Digital Communications and Networks 2022年第2期8卷 208-214页

作者： hao Xie Yongjun xu School of Communication and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China

As a promising technology to improve spectrum efficiency and transmission coverage,Heterogeneous Network(HetNet)has attracted the attention of many scholars in recent ***,with the introduction of the Non-Orthogonal Multiple Access(NOMA)technology,the NOMA-assisted HetNet cannot only improve the system capacity but also allow more users to utilize the same frequency band resource,which makes the NOMA-assisted HetNet a hot ***,traditional resource allocation schemes assume that base stations can exactly estimate direct link gains and cross-tier link gains,which is impractical for practical HetNets due to the impact of channel delays and random *** further improve energy utilization and system robustness,in this paper,we investigate a robust resource allocation problem to maximize the total Energy Efficiency(EE)of Small-Cell Users(SCUs)in NOMA-assisted HetNets under imperfect channel state *** considering bounded channel uncertainties,the robust resource optimization problem is formulated as a mixed-integer and nonlinear programming problem under the constraints of the cross-tier interference power of macrocell users,the maximum transmit power of small base station,the Resource Block(RB)assignment,and the quality of service requirement of each *** original problem is converted into an equivalent convex optimization problem by using Dinkelbach's method and the successive convex approximation method.A robust Dinkelbach-based iteration algorithm is designed by jointly optimizing the transmit power and the RB *** results verify that the proposed algorithm has better EE and robustness than the existing algorithms.

关键词： Heterogeneous network Imperfect channel state information Non-orthogonal multiple access Robust resource allocation Energy efficiency maximization

高频超声下老年女性腓肠肌形态参数与身体活动能力的相关性分析

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中国组织工程研究 2025年第5期29卷 1058-1063页

作者：温子星徐欣朱胜群上海杉达学院国际医学技术学院上海市201209 上海师范大学天华学院健康学院上海市201815

背景:高频超声技术的应用为老年人骨骼肌形态的精准评估提供了有效工具,但获取的骨骼肌形态参数与身体活动能力之间的关联性尚不明确。目的:探究高频超声成像技术下老年女性腓肠肌形态学参数与身体活动能力的相关性,进而发现老年人身体... 详细信息

背景:高频超声技术的应用为老年人骨骼肌形态的精准评估提供了有效工具,但获取的骨骼肌形态参数与身体活动能力之间的关联性尚不明确。目的:探究高频超声成像技术下老年女性腓肠肌形态学参数与身体活动能力的相关性,进而发现老年人身体活动能力的有效预测指标。方法:于上海杉达学院周边社区招募年龄>60周岁,具有独立活动能力的老年女性受试者59例,采集受试者腓肠肌高频超声图像,获取相关参数:包括肌肉厚度、肌纤维长度、羽状角和肌纤维长度/肌肉厚度(fiber length/muscle thickness,Lf/Tm)指数;并进行身体活动能力测试:包括10 m步行、计时起立行走、30 s坐站和握力的测试,对各形态参数和身体活动能力测试指标进行相关性分析。结果与结论:①各骨骼肌形态参数间均存在显著相关性(P<0.05);②羽状角与10 m步行测试结果呈负相关(r=-0.35,P<0.05),与计时起立行走测试结果呈正相关(r=0.32,P<0.05);③Lf/Tm指数与10 m步行测试、握力测试结果呈正相关(r=0.39,P<0.01;r=0.30,P<0.05),与计时起立行走测试结果呈负相关(r=-0.32,P<0.05);④结果表明:腓肠肌羽状角和Lf/Tm指数与老年女性身体活动能力表现出了较好的相关性,可作为身体活动能力预测的有效指标。

关键词：老年女性高频成像身体活动能力骨骼肌形态 10 m步行 Lf/Tm指数