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New Hydrogen Bonded Supramolecular Hydrogels Formed through Gelating Two Isomeric Building Units Simultaneously

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Chinese Chemical Letters 2006年第10期17卷 1388-1390页

作者： Ji wei WU Li ming tang Kai CHEN Liang YAN Yu Jiang WANG Laboratory of Advanced Materials Department of Chemical Engineering Tsinghua University Beijing 100084

New hydrogen bonded supramolecular hydrogels were formed through simultaneously gelating two isomeric building units, 4-oxo-4-（2-pyridinylamino）butanoic acid （G1） and 4-oxo-4-（3-pyridinylamino）butanoic acid （G2... 详细信息

关键词： Supramolecular hydrogel hydrogen bond gelation.

Activation of peroxymonosulfate by sustainable biomass-based carbon nanotubes for controlling the spread of plant viruses in water environments

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Journal of Environmental Sciences 2025年第3期149卷 99-112页

作者： Jian tang Yujie Wang JunMa Yujie Chen ming Chen College of Resources and Environment Yangtze UniversityWuhan 430100China Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing 400714China Chongqing School University of Chinese Academy of SciencesChongqing 400714China School of Geography and Tourism Chongqing Normal UniversityChongqing 400714China

With the increasing demand for water in hydroponic systems and agricultural irrigation,viral diseases have seriously affected the yield and quality of *** removing plant viruses in water environments,virus transmission can be prevented and agricultural production and ecosystems can be *** so far,there have been few reports on the removal of plant viruses in water ***,in this study,easily recyclable biomass-based carbon nanotubes catalysts were synthesized with varying metal activities to activate peroxymonosulfate(PMS).Among them,the magnetic 0.125Fe@NCNTs-1/PMS system showed the best overall removal performance against pepper mild mottle virus,with a 5.9 log_(10)removal within 1 ***,the key reactive species in the 0.125Fe@NCNTs-1/PMS system is^(1)O_(2),which can maintain good removal effect in real water matrices(river water and tap water).Through RNA fragment analyses and label free analysis,it was found that this system could effectively cleave virus particles,destroy viral proteins and expose their *** capsid protein of pepper mild mottle virus was effectively decomposed where serine may be the main attacking sites by^(1)O_(2).Long viral RNA fragments(3349 and 1642 nt)were cut into smaller fragments(∼160 nt)and caused their *** summary,this study contributes to controlling the spread of plant viruses in real water environment,which will potentially help protect agricultural production and food safety,and improve the health and sustainability of ecosystems.

关键词： Pepper mild mottle virus Removal Plant virus spread Biomass-based carbon nanotubes Water environments

Treatment-seeking behaviour and barriers to service access for sexually transmitted diseases among men who have sex with men in China:a multicentre cross-sectional survey

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Infectious Diseases of Poverty 2017年第1期6卷 118-127页

作者： Jun-Jie Xu Yan-Qiu Yu Qing-Hai Hu Hong-Jing Yan Zhe Wang Lin Lu ming-Hua Zhuang Xi Chen Ji-Hua Fu wei-ming tang Wen-Qing Geng Yong-Jun Jiang Hong Shang Key Laboratory of AIDS Immunology of National Health and Family Planning Commission Department of Laboratory MedicineThe First Affiliated HospitalChina Medical UniversityShenyangChina Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases HangzhouChina Jiangsu Provincial Centers for Disease Control and Prevention NanjingChina He’nan Provincial Centers for Disease Control and Prevention ZhengzhouChina Yunnan Provincial Centers for Disease Control and Prevention KunmingChina Shanghai Municipal Centers for Disease Control and Prevention ShanghaiChina Hu’nan Provincial Centers for Disease Control and Prevention ChangshaChina Shandong Provincial Centers for Disease Control and Prevention JinanChina University of North Carolina Project-China GuangzhouChina

Background:Delayed or inappropriate treatment for sexually transmitted diseases(STDs)increases the risk of HIV acquisition and may cause other harmful ***,studies on STD treatment-seeking behaviour and correlated factors in men who have sex with men(MSM)are *** information is crucial for the promotion of STD treatment-seeking behaviour and reduction of HIV transmission among Chinese ***:During 2012-2013,a multicentre cross-sectional study was conducted in 7 Chinese *** completed an interview-questionnaire and gave venous blood samples,which were then tested for antibodies to HIV,syphilis,and herpes simplex virus-2(HSV-2).MSM who tested positive for syphilis/HSV-2 or had obvious STD-related symptoms within the last 12 months were defined as suspected STD-infected ***:Of the 4496 eligible MSM who completed this survey,24.4%(1096/4496)were categorized as suspected STD-infected MSM.35.7%(391/1096)of these MSM with suspected STD infections sought STD treatment in clinics within the last 12 *** MSM who did not attend STD clinics for treatment,the prevalence of syphilis and HSV-2 was significantly higher;the HIV prevalence and incidence within this subpopulation reached as high as 14.5%and 12.2/100 person-years,*** logistic regression analysis indicated that having 7-12 years of education(vs.≤6 years;aOR,2.5;95%CI,1.0-6.1),≥13 years of education(vs.≤6 years:aOR,2.8;95%CI,1.2-7.0),monthly income>500 USD(vs.≤500 USD:aOR,1.5;95%CI,1.1-2.1),obvious STD-related symptoms within last 12 months(aOR,5.3;95%CI,3.7-7.5),being HIV infected(aOR,1.7;95%CI,1.1-2.6),currently syphilis infected(aOR,0.6;95%CI,0.4-0.9)and HSV-2 infected(aOR,0.6;95%CI,0.5-0.9)were independent correlates with seeking STD treatment in clinics among Chinese ***:The high prevalence of STD infection coupled with a low proportion of individuals who exhibit appropriate treatment-seeking behaviour create a high risk of a g

关键词： Sexually transmitted diseases(STDs) Men who have sex with men(MSM) Treatment-seeking behaviour HIV China

A six-variable quasi-3D isogeometric approach for free vibration of functionally graded graphene origami-enabled auxetic metamaterial plates submerged in a fluid medium

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 157-176页

作者： wei CHEN Zhihong tang Yufen LIAO Linxin PENG College of Civil Engineering University of South China College of Civil Engineering and Architecture Guangxi University Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education Guangxi University

This paper presents, for the first time, an effective numerical approach based on the isogeometric analysis(IGA) and the six-variable quasi-three dimensional(3D)higher-order shear deformation theory(HSDT) to study the free vibration characteristics of functionally-graded(FG) graphene origami(GOri)-enabled auxetic metamaterial(GOEAM) plates submerged in a fluid medium. The plate theory incorporates the thickness stretching and the effects of transverse shear deformation without using any shear correction factors. The velocity potential function and Bernoulli's equation are used to derive the hydrodynamic pressure acting on the plate surface. Both horizontally and vertically immersed plate configurations are considered here in the form of inertia *** plates are composed of multilayer GOEAMs, with the GOri content varying through the plate's thickness in a layer-wise manner. This design results in graded auxetic *** material properties are evaluated by mixing rules and a genetic programming(GP)-assisted micromechanical model. The governing equations of motion for the FG-GOEAM plates immersed in a fluid medium are derived by Hamilton's principle. After validating the convergence and accuracy of the present model, a comprehensive parametric study is carried out to examine the effects of the GOri content, GOri distribution pattern, GOri folding degree, fluid level, immersed depth, and geometric parameter on the natural frequencies of the FG-GOEAM plates. The results show that the natural frequencies for the four GOri distribution patterns increase with the increase in the layer number when the lay number is fewer than 10, and then stabilize after the layer number reaches ***, in general, the natural frequency of the FG-GOEAM plate in a vacuum or fluid increases when the GOri content increases, while decreases when the GOri folding degree increases. Some additional findings related to the numerical results are presented in the conclusions. It is belie

关键词： free vibration functionally-graded (FG) graphene origami (GOri)-enabled auxetic metamaterial (GOEAM) plate hydrodynamic pressure isogeometric analysis (IGA) O321 quasi-three dimensional (3D) higher-order shear deformation theory (HSDT)

Low-profile,low sidelobe array antenna with ultrawide beam coverage for UAV communication

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Chinese Journal of Aeronautics 2025年第1期38卷 444-454页

作者： Mei LI Zhiliang SHANG Lin PU ming-Chun tang Lei ZHU School of Microelectronics and Communication Engineering Chongqing UniversityChongqing 400044China Department of Electrical and Computer Engineering University of MacaoMacao SAR 999078China

This paper presents a design method to implement an antenna array characterized by ultra-wide beam coverage,low profile,and low Sidelobe Level(SLL)for the application of Unmanned Aerial Vehicle(UAV)air-to-ground *** array consists of ten broadside-radiating,ultrawide-beamwidth elements that are cascaded by a central-symmetry series-fed network with tapered currents following Dolph-Chebyshev distribution to provide low ***,an innovative design of end-fire Huygens source antenna that is compatible with metal ground is presented.A low-profile,half-mode Microstrip Patch Antenna(MPA)is utilized to serve as the magnetic dipole and a monopole is utilized to serves as the electric dipole,constructing the compact,end-fire,grounded Huygens source ***,two opposite-oriented end-fire Huygens source antennas are seamlessly integrated into a single antenna element in the form of monopole-loaded MPA to accomplish the ultrawide,broadside-radiating *** consideration has been applied into the design of series-fed network as well as antenna element to compensate the adverse coupling effects between elements on the radiation *** indicates an ultrawide Half-Power Beamwidth(HPBW)of 161°and a low SLL of-25 dB with a high gain of 12 d Bi under a single-layer *** concurrent ultrawide beamwidth and low SLL make it particularly attractive for applications of UAV air-to-ground communication.

关键词： Array antenna Broad beam Fan beam Low sidelobe level Chebyshev synthesis UAV communication

High HIV incidence epidemic among men who have sex with men in china: results from a multi-site cross-sectional study

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Infectious Diseases of Poverty 2016年第1期5卷 753-763页

作者： Jun-Jie Xu wei-ming tang Hua-Chun Zou Tanmay Mahapatra Qing-Hai Hu Geng-Feng Fu Zhe Wang Lin Lu ming-Hua Zhuang Xi Chen Ji-Hua Fu Yan-Qiu Yu Jin-Xin Lu Yong-Jun Jiang Wen-Qing Geng Xiao-Xu Han Hong Shang Key Laboratory of AIDS Immunology of National Health and Family Planning Commission Department of Laboratory MedicineThe First Affiliated HospitalChina Medical UniversityShenyang 110001People’s Republic of China Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases HangzhouPeople’s Republic of China University of North Carolina at Chapel Hill Project-ChinaNo.2 Lujing RoadGuangzhou 510085People’s Republic of China Guangdong Provincial Center for Skin Diseases and STIs Control Guangzhou 510085People’s Republic of China Kirby Institute the University of New South WalesSydneyNSW 2052Australia Department of Epidemiology Fielding School of Public HealthUniversity of CaliforniaLos Angeles 90095USA Jiangsu Provincial Centers for Disease Control and Prevention NanjingChina He’nan Provincial Centers for Disease Control and Prevention ZhengzhouChina Yunnan Provincial Centers for Disease Control and Prevention KunmingChina Shanghai Municipal Centers for Disease Control and Prevention ShanghaiChina Hu’nan Provincial Centers for Disease Control and Prevention ChangshaChina Shandong Provincial Centers for Disease Control and Prevention JinanChina

Background:Recent upsurge of new HIV infections among men who have sex with men(MSM)is a major concern in *** of national-level information regarding the burden and predictors of this progressive epidemic of new infections called for a multi-centric,timely and comprehensive ***:Mixed methods were used to recruit MSM from seven cities in China between 2012 and *** and established HIV infections were estimated by Western Blot and BED HIV-1 capture enzyme *** and herpes simplex virus-2(HSV-2)were also ***:A total of 4496 eligible MSM were *** majority was aged≤35 years(77.5%),migrants(60.3%),never married(69.8%),and played receptive role in anal sex(70.5%).The HIV prevalence was 9.9%,and 41.9%were recently infected,with sensitivity/specificity adjusted HIV incidence of 8.9(95%CI:7.6-10.2)/100 *** prevalence of history HSV-2 and syphilis were 12.5%and 8.5%,*** HIV infection was associated with having multiple male partners(aOR=1.4,95%CI 1.1-1.9),recreational drug use(aOR=2.2,95%CI 1.6-3.0),anal bleeding(aOR=2.1,95%CI 1.4-3.0),syphilis infection(aOR=2.8,95%CI 1.9-4.3)and history HSV-2 infection(aOR=2.3,95%CI 1.5-3.3).Conclusion:High rate of recent HIV infection is potentially resulting in progressive deterioration of the overall HIV epidemic among MSM in *** interventions to address high-risk MSM including those having multiple partners,history of recreational drug use and syphilis or HSV-2 infection seemed to be the need of the hour.

关键词： Men who have sex with men(MSM) HIV Incidence BED HIV-1 capture enzyme immunoassay(BED-CEIA)

Highly efficient catalytic transfer hydrogenation for the conversion of nitrobenzene to aniline over PdO/TiO_(2):The key role of in situ switching from PdO to Pd

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Journal of Environmental Sciences 2025年第2期148卷 515-528页

作者： Anqi Lu Xiaokang Xiang ming Lei Shuangshuang Huang Bingbing Liang Siyu Zhao Lihua Zhu Heqing tang College of Resources and Environmental Science South-Central Minzu UniversityWuhan 430074China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Physics and Technology Center for Electron MicroscopyMOE Key Laboratory of Artificial Micro-and Nano-Structuresand Institute for Advance StudiesWuhan UniversityWuhan 430072China

The reduction of nitrobenzene to aniline is very important for both pollution control and chemical ***,difficulties still remain in developing a catalytic system having high efficiency and selectivity for the production of ***,it was found that PdO nanoparticles highly dispersed on TiO_(2)support(PdO/TiO_(2))functioned as a highly efficient catalyst for the reduction of nitrobenzene in the presence of *** favorable conditions,95%of the added nitrobenzene(1 mmol/L)was reduced within 1 min with an ultra-low apparent activation energy of 10.8 kJ/mol by using 0.5%PdO/TiO_(2)as catalysts and 2 mmol/L of NaBH4 as reductants,and the selectivity to aniline even reached up to 98%.The active hydrogen specieswere perceived as dominant species during the hydrogenation of nitrobenzene by the results of isotope labeling experiments and ESR spectroscopic.A mechanismwas proposed as follows:PdO activates the nitro groups and leads to in-situ generation of Pd,and the generated Pd acts as the reduction sites to produce active hydrogen *** this catalytic system,nitrobenzene prefers to be adsorbed on the PdO nanoparticles of the PdO/TiO_(2)***,the addition of NaBH4 results in in-situ generation of a Pd/PdO/TiO_(2)composite from the PdO/TiO_(2)composite,and the Pd nanoclusters would activate NaBH4 to generate active hydrogen species to attack the adsorbed nitro *** work will open up a new approach for the catalytic transfer hydrogenation of nitrobenzene to aniline in green chemistry.

关键词： Catalytic transfer hydrogenation Reduction Pd Nitrobenzene Aniline

Research progress on piperidine-containing compounds as agrochemicals

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Chinese Chemical Letters 2025年第1期36卷 58-67页

作者： wei Sun Anjing Liao Li Lei Xu tang Ya Wang Jian Wu State Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationGuizhou UniversityGuiyang 550025China

Piperidine is a crucial pharmacophore and a special scaffold in the realm of drug *** flexibility increases the molecule’s capability to bind to the *** piperidine-containing compounds are distinguished by their remarkable activity,and are increasingly becoming a vital category of *** this review,the research progress of piperidines in the discovery of pesticides was updated according to their active *** structure-activity relationships(SARs),and mechanisms of action of piperidine-containing compounds were also *** article is meant to enable readers to quickly understand piperidines,while providing ideas for creating piperidines with novel structures and unique mechanisms of action.

关键词： Piperidine Agrochemicals Biological activity Structure-activity relationships Mechanism of action

Mixed reality technology improves liver surgery in lower-volume medical center

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Hepatobiliary & Pancreatic Diseases International 2025年第1期24卷 117-118页

作者： Qi-Fu Yan wei Yang Jian-ming Ma Zhaxiyundan Yong-Zhi Chen Rui tang General Surgery Department Lhasa People’s HospitalXizang Autonomous RegionLhasa 850000China Hepatopancreatobiliary Center Beijing Tsinghua Changgung HospitalKey Laboratory of Digital Intelligence Hepatology(Chinese Ministry of Education)School of Clinical MedicineTsinghua UniversityBeijing 102218China

To the Editor:We read with great interest the recent article by Balci et al.[1].In the study,the authors mentioned that their mixed reality(MR)technology has already successfully been applied in open and laparoscopic living donor hepatectomy and in complex laparoscopic liver *** such operations,the MR models of the liver are pulled out and superimposed onto the actual *** can verify the relationship between tumors and crucial areas in order to enhance margin clearance and R0 resection and reduce the risk of injuring major blood *** applying MR(including augmented reality)technology,blood vessels and tumor structures in the liver can be displayed during surgery,which permits precise navigation during complex surgical *** MR was used in surgical education,and most learners believed that 3D models were useful in planning safer surgical paths,reducing intraoperative complications and training of young surgeons[2].

关键词： surgery precise operations