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Rigid Biphenyl-contained Epoxy Resins with Improved Thermal Resistant Properties

Chinese Journal of Polymer Science 2017年第11期35卷 1428-1435页

作者： Xiao-yan Wei bo-xuan zhao 尚亚卓程元荣 Key Laboratory for Advanced Materials School of Chemistry & Molecular Engineering East China University of Science and Technology Shanghai Wujing Optoelectronics Sci&Tech Co. Ltd Department of Materials Science Fudan University

Biphenyl-contained monomer of 1,4-bis[2-（3,4-epoxy cyclohexyl ethyl） dimethylsilyl] biphenyl （BP-SiH-EP） was prepared via hydrosilylation reaction of 1,4-bis（dimethylsilyl） biphenyl （BP-SiH） and 1,2-epoxy-4-vinylcyclohexane in the presence of Karstedt＇s catalyst. ^1H-NMR, 13C-NMR and FTIR were used to characterize the structure of the obtained monomer. BP-SiH-EP was then cured by methyl hexahydrophthalic anhydride （MeHHPA） with 1-cyanoethyl-2-ethyl-4- methylimidazole as an accelerator. The polymerization behavior was studied by DSC. The results of DMA measurement demonstrate that the cured BP-SiH-EP/MeHHPA can maintain high storage modulus （〉1 GPa） in a wide range of temperature up to 176 ℃. According to the damping factor curve of DMA, cured BP-SiH-EP/MeHHPA exhibits a high glass transition temperature （Tg） of 192 ℃, which is 20 ℃ higher than that of cured 1,4-bis[2-（3,4-epoxy cyclohexyl ethyl） dimethylsilyl] benzene （DEDSB）/MeHHPA. TGA results show that cured BP-SiH-EP/MeHHPA has good thermal stability （Tso/o = 339 ℃） due to the high heat-resistance of rigid biphenyl group. Moreover, the crosslinking density of cured BP-SiH-EP/MeHHPA should be lower than that of cured DEDSB/MeHHPA estimated from their chemical structures, which conflicts with the calculated results based on the rubber elasticity equation. The inconsistence indicates that the calculated crosslinking densities are not comparable, possibly owing to their differences in the rigidity of polymer chains and intermolecular interaction.

关键词： Epoxy resin Hydrosilylation Biphenyl group Thermal property Crosslinking density

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A Comprehensive Review of Group Activity Recognition in Videos

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International Journal of Automation and computing 2021年第3期18卷 334-350页

作者： Li-Fang Wu Qi Wang Meng Jian Yu Qiao bo-xuan zhao College of Information and Communication Engineering Beijing University of TechnologyBeijing 100124China Beijing Municipal Key Lab of Computation Intelligence and Intelligent Systems Beijing University of TechnologyBeijing 100124China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

Human group activity recognition(GAR)has attracted significant attention from computer vision researchers due to its wide practical applications in security surveillance,social role understanding and sports video *** this paper,we give a comprehensive overview of the advances in group activity recognition in videos during the past 20 ***,we provide a summary and comparison of 11 GAR video datasets in this ***,we survey the group activity recognition methods,including those based on handcrafted features and those based on deep learning *** better understanding of the pros and cons of these methods,we compare various models from the past to the ***,we outline several challenging issues and possible directions for future *** this comprehensive literature review,readers can obtain an overview of progress in group activity recognition for future studies.

关键词： Group activity recognition(GAR) human activity recognition scene understanding video analysis computer vision

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A network pharmacology approach to explore the mechanism of action of Yiqi Fumai lyophilized injection in the treatment of novel coronavirus disease

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Traditional Medicine Research 2023年第3期8卷 1-9页

作者： Yan Zhou Lei Fan Du-Hong Xie Xiao-Ying Han bo-xuan zhao Yi Zhang De-Kun Li Ai-Chun Ju Hai-Xia Ji Ou Qiao Xin-Yu Zhang Wen-Zhe Wang Chang-Xiao Liu Wen-Yuan Gao School of Pharmaceutical Science and Technology Tianjin UniversityTianjin 300072China School of International Education Tianjin UniversityTianjin 300072China Clinical School of Changsha Health Vocational College Changsha 410100China Tasly Pride Pharmaceutical Company Limited Tianjin 300410China Tianjin Pharmaceutical Research Institute Tianjin 300072China

Background:Shengmai decoction,which has been included in the diagnosis and treatment of coronavirus disease 2019(COVID-19),is effective in the early treatment of patients with severe *** Fumai lyophilized injection(YQFM)is a modern Chinese medicine preparation of the Shengmai *** mechanism of its intervention at the molecular level in the severe stage of COVID-19 remains ***,it is necessary to investigate the mechanism of YQFM in the treatment of patients with severe ***:The corresponding target genes of the main active ingredients in YQFM and COVID-19 were obtained by using multiple databases and literature retrieval.A protein-protein interaction network was constructed,and enrichment analysis of the target was performed using Cytoscape ***,the docking of all the identified compounds with angiotensin-converting enzyme II was confirmed by applying molecular docking ***:YQFM has anti-inflammatory effects on RAW267.4 *** main active compounds of YQFM are all effective anti-inflammatory agents,and these active compounds also show beneficial physiological functions,such as anti-oxidation,anti-bacterial,and anticancer *** Ontology analysis showed enrichment in the following pathways:lipopolysaccharides,interleukins,NF-kappa B,interleukin-2 and others,revealing that YQFM may play a role in the treatment of patients with severe COVID-19 through these ***:YQFM has multicomponent and multitarget characteristics,and it could reduce lung injury by inhibiting inflammatory reactions,promoting antiviral activities,and regulating immunity,among other functions,to treat patients with severe COVID-19.

关键词： network pharmacology novel corona virus traditional Chinese medicine natural compounds inflammation

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Resolving the developmental mechanisms of cardiac microthrombosis of SARS-CoV-2 based on single-cell transcriptome analysis

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Science China Life Sciences 2025年第1期 103-115页

作者： Xizi Luo Nan Zhang Yuntao Liu Beibei Du xuan Wang Tianxu zhao Bingqiang Liu Shishun zhao Jiazhang Qiu Guoqing Wang State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Basic MedicineJilin University State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Veterinary MedicineJilin University College of Mathematics Jilin University Bioinformatic Lab School of MathematicsShandong University Department of Cardiology China-Japan Union HospitalJilin University

The coronavirus disease 2019（COVID-19） outbreak caused by the severe acute respiratory syndrome coronavirus-2（SARS-CoV-2） developed into a global health emergency. Systemic microthrombus caused by SARS-CoV-2 infection is a common complication in patients with COVID-19. Cardiac microthrombosis as a complication of SARS-CoV-2 infection is the primary cause of cardiac injury and death in patietns with severe COVID-19. In this study, we performed single-cell sequencing analysis of the right ventricular free wall tissue from healthy donors,patients who died during the hypercoagulable period of characteristic coagulation abnormality（CAC）, and patients who died during the fibrinolytic period of CAC. We collected 61,187 cells enriched in 24 immune cell subsets and 13 cardiac-resident cell subsets. We found that in the course of SARS-CoV-2 infected heart microthrombus, MYO1EhighRASGEF1Bhighmonocyte-derived macrophages promoted hyperactivation of the immune system and initiated the extrinsic coagulation pathway by activating chemokines CCL3, CCL5. This series of events is the main cause of cardiac microthrombi following SARS-CoV-2 infection. In a SARS-CoV-2 infected heart microthrombus, excessive immune activation is accompanied by an increase in cellular iron content, which in turn promotes oxidative stress and intensifies intercellular competition. This induces cells to alter their metabolic environment, resulting in increased sugar uptake via the glycosaminoglycan synthesis pathway. In addition, high levels of reactive oxygen species generated by elevated iron levels promote increased endogenous malondialdehyde synthesis in a subpopulation of cardiac endothelial cells. This exacerbates endothelial cell dysfunction and exacerbates the coagulopathy process.

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Progress in the study of antiplatelet and antithrombotic effects of salvia polyphenolic acid for injection

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Drug Combination Therapy 2022年第4期4卷 1-7页

作者： Lei Fan Du-Hong Xie Yan Zhou bo-xuan zhao Xiao-Ying Han De-Kun Li Ai-Chun Ju Xin-Yu Zhang Wen-Zhe Wang Chang-Xiao Liu Wen-Yuan Gao School of International Education Tianjin UniversityTianjin 300072China Changsha Health Vocational College Changsha 410100China School of Pharmaceutical Science and Technology Tianjin UniversityTianjin 300072China Tasly Pride Pharmaceutical Company Limited Tianjin 300410China Tianjin Pharmaceutical Research Institute Tianjin 300072China

Salvia polyphenolic acid for injection is a new generation of Chinese medicine injectable,which is developed by extracting and separating the water-soluble phenolic acid active ingredients of Salvia divinorum by using modern advanced technology as raw *** research shows that salvia polyphenolic acid has anti-inflammatory,anti-oxidative stress,neurotrophic,regenerative and protective effects on ischemic brain injury and can reduce myocardial ischemic *** clinical practice,it is mainly used in the treatment of stroke(mild to moderate cerebral infarction)in the recovery period of fetish blood *** recent years,it has also been gradually extended to treating acute cerebral infarction and respiratory *** its launch,the pharmacological effects and clinical applications of Danshen polyphenolic acid for injection are reviewed to provide research clues for further essential trials and reference basis for clinical promotion and application.

关键词： salvia polyphenolic acid for injection oxidative stress cardiomyopathy thrombosis anti-inflammator apoptosis

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Research progress on pharmacological action and mechanism of injection Yiqi Fumai lyophilized injection in treating cardiomyopathy

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TMR Pharmacology Research 2022年第3期2卷 31-35页

作者： Du-Hong Xie bo-xuan zhao Lei Fan Xiao-Ying Han Yan Zhou De-Kun Li Ai-Chun Ju Xin-Yu Zhang Wen-Zhe Wang Chang-Xiao Liu Wen-Yuan Gao Changsha Health Vocational College Changsha 410100China School of Pharmaceutical Science and Technology Tianjin UniversityTianjin 300072China School of International Education Tianjin UniversityTianjin 300072China Tasly Pride Pharmaceutical Company Limited Tianjin 300410China Tianjin Pharmaceutical Research Institute Tianjin 300072China

The pharmacological studies of Yiqi Fumai lyophilized injection in cardiovascular system mainly include anti-cardiac failure,improvement of myocardial ischemia,improvement of myocardial hypertrophy and myocardial injury caused by ischemia and *** recent years,a large number of studies have shown that Yiqi Fumai Lyophilized Injection has good protective effects on myocardial injury caused by ischemia and hypoxia by enhancing myocardial contractility and delaying ventricular remodeling.

关键词： YQFM cardiomyopathy thrombosis abnormal endothelial function myocardial apoptosis

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Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment

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Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： zhao-Jun Zhang Wen-Wei Wang Jing-Shui Zhen bo-Cheng Li De-Cheng Cai Yang-Yang Du Hui Huang Offshore Oil Engineering Co.Ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer(GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs,and a calculation method based on the conjugate beam method was *** composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab *** methods,epoxy resin bonding,and stud connection,were used to connect the composite slabs with the steel *** experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process:concrete cracking and steel bar yielding at the internal *** contrast,the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the concrete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced compressive failure of concrete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.

关键词： Moment redistribution GFRP-concrete composite slabs bending moment experimental study analysis model

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Homologous CoS2 interface with directed electron transfer and strong chloridion repulsion for efficient seawater oxidation

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Science China Chemistry 2025年

作者： Yuan Tian Jiang-bo Chen Jie Ying Ge Tian Yu-xuan Xiao Yi Lu Si-Ming Wu Wei Geng Ling Shen Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering and Shenzhen Research Institute & Laoshan Laboratory Wuhan University of Technology School of Chemical Engineering and Technology Sun Yat-Sen University National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory

Seawater electrolysis is a highly promising method to produce high energy density hydrogen,especially in dry areas that have scarce freshwater ***,application of seawater electrolysis is confronted by two major problems associated with catalysts employed for the anodic oxygen evolution reaction （OER） including the competitive hypochlorite evolution reaction（HCER） and strong chloridion （Cl–） triggered *** studies aimed at overcoming these problems,a facile method has been developed to synthesize a homologous CoS2heterojunction as an OER *** to a difference in work functions at the interface and increased electron density,this material has directed electron transfer and strong chloridion repulsion properties,*** have shown that CoS2achieves low overpotentials of 289 and 322 mV at 10 mA cm-2current density in respective alkaline （1 M KOH） and alkaline simulated seawater ***,the outstanding stability of CoS2is reflected in a negligible decline in activity during promotion of the OER for 100 *** of density functional theory calculations reveal that the homologous CoS2heterojunction promotes directed electron transport for optimizing adsorption/desorption of reactive species and heightens the Cl-adsorption energy for strongly repulsing Cl-,phenomena that enhance OER performance in alkaline simulated seawater.

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High sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber

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Optoelectronics Letters 2025年

作者： CUI Nan PAN Honggang ZHANG Ailing zhao Zihong CHEN Zhipan ZHANG bo Tianjin Key Laboratory of Film Electronic and Communication Devices， Engineering Research Center of Optoelectronic Devices and Communication Technology， Ministry of Education， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

In this paper， we propose and numerically characterize the optical characteristics of a high sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber （PCF）. Four light transmission channels are constructed by using big air holes. The small rectangular air hole in the center of the fiber core is used to add asymmetry. We use gold plasma material to achieve better sensing performance. A thin film of TiO2is placed on the PCF surface， which assists gold in the adhesion on PCF. The maximum wavelength sensitivity of the sensor can reach 20000 nm/RIU in both x and y polarization modes. While the maximum wavelength resolution of the sensor is 5×10-6RIU. The average wavelength sensitivity reached 15900nm/RIU and 15800nm/RIU in x and y polarization mode. The sensor features R2=0.9969 / R2=0.9966 high linear performance in x and y polarization mode and the maximum FOM values 509.13 RIU-1/ 489.63 RIU-1in x and y polarization mode. Besides the sensor’s detection range is 1.26-1.36， which is a wide refractive index detection range. The sensor has a wide range of applications in biomedical and other fields.

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A versatile synthetic strategy towards rare earth based metal-organic frameworks

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Science China Chemistry 2025年

作者： Quan Shi Yun-Hao Xu Ming-Hui Chen Peng zhao Wen-bo Deng Ji Xiong Kai Guo Ya-Qing Feng Bao Zhang School of Chemical Engineering and Technology Tianjin University Tianjin Collaborative Innovation Center of Chemical Science and Engineering Guangdong Laboratory Chemistry & Fine Chemical Industry Jieyang Center

Rare earth metal-organic frameworks (RE-MOFs) have drawn wide attention owing to diverse network structures and various application ***,due to the unpredictable formation of the nodes,it is still challenging to design novel RE-MOFs.A novel versatile strategy was developed employing a RE-acetate complex (RE2(CH3COO)6·4H2O) as a precursor to construct RE-MOFs.2D RE-MOFs (RE-DBP) and 3D RE-MOFs (RE-TCPP) could be obtained by using dicarboxylic porphyrin ligands H2DBP and tetracarboxylic porphyrin ligands H2TCPP,*** RE-MOFs were further synthesized to verify the universality of the *** crystalline RE-MOFs could also be prepared at room temperature via the developed strategy,which could significantly promote large-scale preparation and practical application of *** proof of the concept,the performance of porphyrin-based RE-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the RE-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic performance,which was also greater than that of the corresponding 3D MOF Tb-TCPP(Co) due to the optimal 2D structure and thus the accelerated photogenerated charge separation and transfer *** work not only provides a novel versatile strategy to design and develop RE-MOFs,but also proposes a promising approach for the potential bulk production of RE-MOFs at room temperature.

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