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Chinese Chemical Letters 2024年第7期35卷 188-191页

作者： Wenhao wang Guangpu Zhang Qiufeng wang Fancang Meng Hongbin jia Wei jiang Qingmin ji Herbert Gleiter Institute for Nanoscience School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Chemical Engineering Nanjing University of Science&TechnologyNanjing 210094China Nantong Junjiang Material Science and Technology Co. Ltd.Haimen 226136China

TiO_(2)-based films are one of the most attractive photocatalysts owing to their highly cost-effective ***,most TiO_(2)-based photocatalytic films for dye degradation are in the form of robust films(without flexibility),TiO_(2)coatings on carbon matrix(with leakage risk),or surface-covered TiO_(2)hybrids(not favorite to contact with external molecules).Therefore,the development of durable and highly efficient TiO_(2)photocatalytic films for dye degradation is still ***,we fabricated soft photocatalytic hybrid membranes(TANFs)from TiO_(2)nanotubes(Ti NT)and aramid nanofiber(ANF)by a facile vacuum filtration *** similar morphology and dimension of Ti NT and ANF enable them intricately intertwine with each other in the membrane *** an appropriate mixing ratio,the TANF exhibited significantly improved optical and mechanical *** used for dye degradation,the membrane showed excellent photocatalytic performance and could keep stable activity and integrated state for repeated usage.

关键词： Titanium dioxide nanotube Aramid nanofiber Flexible hybrid membrane Photocatalysis Dye degradation

Brazing 6061 aluminum alloy with Al-Si-Zn filler metals containing Sr

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International Journal of Minerals,Metallurgy and Materials 2013年第4期20卷 365-370页

作者： Wei Dai Song-bai Xue Feng ji jiang Lou Bo Sun Shui-qing wang School of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Zhejiang Xinrui Welding Material Co. Ltd

Al-6.5Si-42Zn and Al-6.5Si-42Zn-0.09Sr filler metals were used for brazing 6061 aluminum alloy. Air cooling and water cooling were applied after brazing. Si phase morphologies in the brazing alloy and the brazed joints were investigated. It was found that zinc in the Al-Si filler metals could reduce the formation of eutectic Al-Si phase and lower the brazing temperature at about 520℃. Adding 0.09wt% Sr element into the Al-6.5Si-42Zn alloy caused a-Al phase refinement and transformed acicular Si phase into the finely fiber-like. After water cooling, Zn element dissolved into the Al-Si eutectic area, and η-Zn phase disappeared in the brazed joints. Tensile strength testing results showed that the Sr-modified filler metal could enhance the strength of the brazed joints by 13% than Al-12Si, while water-cooling further improved the strength at 144 MPa.

关键词： aluminum alloys brazing joints filler metals cooling strontium

A Novel Palladium-Catalyzed Reaction and Its Application in Preparation of Derivatives of Stilbazols

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Chinese Chemical Letters 2001年第5期12卷 399-402页

作者： Zhi Yong wang Chao jiang ji Hui WU Qing Xiang GUO Dept.of Chem. University of Science&Technology of ChinaHefei 230026

A novel palladium-catalyzed coupling reaction for the preparation of derivatives of stilbazoles was presented. A series of stilbazoles were synthesized firstly by this highly efficient method. From this reaction it wa... 详细信息

关键词： Palladium catalyzed preparation stilbazole

Doxorubicin-loaded silicon nanoparticles impregnated into red blood cells featuring bright fluorescence, strong photostability, and lengthened blood residency

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Nano Research 2018年第4期11卷 2285-2294页

作者： Airui jiang Bin Song Xiaoyuan ji Fei Peng Houyu wang Yuanyuan Su Yao He Laboratory of Nanoscale Biochemical Analysis Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhau Nano Science and Technology (NANO-CIC) Soochow University Suzhou 215123 China

Based on the unique advantages of fluorescent silicon nanoparticles （SiNPs）, long circulation red blood cells （RBCs）, and anti-cancer drug molecules （i.e., doxorubicin （DOX））, we developed multifunctional DOX-loaded SiNPs impregnated into RBCs. Importantly, the resulting drug delivery systems （DDSs） simultaneously exhibited bright fluorescence coupled with robust photostability （i.e., - 24% loss of fluorescent intensity after 25 min continuous laser irradiation） and significantly lengthened blood residency （i.e., t1/2 = 7.31 ± 0.96 h, 3.9-fold longer than pure DOX-loaded SiNPs）. Therefore, this novel DDS featuring multi-functionalities shows high potential for cancer diagnosis and therapy, particularly for tumor imaging and chemotherapy in a synchronous manner.

关键词： fluorescent silicon nanoparticles mulfi-function red blood cells drug delivery system

Controllability of multi-agent systems based on agreement protocols

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Science in China(Series F) 2009年第11期52卷 2074-2088页

作者： wang Long jiang FangCui XIE GuangMing ji Zhijian Center for Systems and Control College of Engineering and Key Laboratory of Machine Perception (Ministry of Education) Peking University Beijing 100871 China College of Automation Engineering Qingdao University Qingdao 266071 China

This paper investigates the controllability of multi-agent systems based on agreement protocols. First, for a group of single-integrator agents, the controllability is studied in a unified framework for both networks with leader-following structure and networks with undirected graph. Some new necessary/sufficient conditions for the controllability of networks of single-integrator agents are established. Second, we prove that, under the same topology and same prescribed leaders, a network of high-order dynamic agents is completely controllable if and only if so is a network of single-integrator agents. Third, how the selection of leaders and the coupling weights of graphs affect the controllability is analyzed. Finally, some numerical simulations are presented to demonstrate the effectiveness of the theoretical results.

关键词： multi-agent systems controllability structural controllability agreement protocols high-order dynamic agents graphs

Characterization of submicron particles during autumn in Beijing,China

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Journal of Environmental Sciences 2018年第1期30卷 16-27页

作者： Peng Xu Junke Zhang Dongsheng ji Zirui Liu Guiqian Tang Changsheng jiang Yuesi wang State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Eco-environments in Three Gorges Reservoir Region Ministry of EducationCollege of Resources and EnvironmentSouthwest UniversityChongqing 400716China

In this study, we performed a highly time-resolved chemical characterization of nonrefractory submicron particles（NR-PM_1） in Beijing by using an Aerodyne high-resolution time-of-flight aerosol mass spectrometer（HR-ToF-AMS）. The results showed the average NR-PM_1 mass concentration to be 56.4 ± 58.0 μg/m^3, with a peak at 307.4 μg/m^3. Due to the high frequency of biomass burning in autumn, submicron particles significantly increased in organic content, which accounted for 51% of NR-PM_1 on average. Secondary inorganic aerosols（sulfate ＋ nitrate ＋ ammonium） accounted for 46% of NR-PM_1, of which sulfate,nitrate, and ammonium contributed 15%, 20%, and 11%, respectively. To determine the intrinsic relationships between the organic and inorganic species, we used the positive matrix factorization（PMF） model to merge the high-resolution mass spectra of the organic species and NO＋and NO_2~＋ions. The PMF analysis separated the mixed organic and nitrate（NO＋and NO_2~＋） spectra into four organic factors, including hydrocarbon-like organic aerosol（HOA）, oxygenated organic aerosol（OOA）, cooking organic aerosol（COA）, and biomass burning organic aerosol（BBOA）, as well as one nitrate inorganic aerosol（NIA） factor. COA（33%） and OOA（30%） contributed the most to the total organic aerosol（OA） mass, followed by BBOA（20%） and HOA（17%）. We successfully quantified the mass concentrations of the organic and inorganic nitrates by the NO＋and NO2＋ions signal in the organic and NIA factors. The organic nitrate mass varied from 0.01-6.8 μg/m^3, with an average of 1.0 ±1.1 μg/m^3, and organic nitrate components accounted for 10% of the total nitrate mass in this observation.

关键词： Submicron particles Biomass burning Source apportionment Organic and inorganic nitrates

Carbon nanotubes/TiO_2 nanotubes composite photocatalysts for efficient degradation of methyl orange dye

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Particuology 2013年第6期11卷 737-742页

作者： Tingshun jiang Lei Zhang Meiru ji Qian wang Qian Zhao Xiaoqi Fu Hengbo Yin School of Chemistry and Chemical Engineering Jiangsu University

A series of carbon nanotubes/TiO2 nanotubes （CNTs/TNTs） composite photocatalysts were successfully prepared by incorporation of CNTs in HNO3 washing process. These photocatalysts were characterized by XRD, N2 physical adsorption, UV-vis diffuse reflectance spectroscopy, TEM and Raman spectroscopy, respectively, and their photocatalytic activities were tested by using methyl orange （MO） as a model compound. Also, the effects of amount of CNTs incorporated, calcination temperature and amount of catalyst on the photocatalytic activity of the composite photocatalyst were systematically investigated. The results show that the CNTs/TNTs composite exhibits much higher photocatalytic activity than that of the TNTs or CNTs alone.

关键词： Carbon nanotube TiO2 nanotube Composite photocatalyst Characterization Photocatalytic activity Methyl orange

Detection of Internal Leaf Structure Deterioration Using a New Spectral Ratio Index in the Near-Infrared Shoulder Region

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Journal of Integrative Agriculture 2014年第4期13卷 760-769页

作者： LIU Liang-yun HUANG Wen-jiang PU Rui-liang wang ji-hua Key Laboratory of Digital Earth Science Center for Earth Observation and Digital EarthChinese Academy of Sciences Department of Geography Environmentand PlanningUniversity of South Florida National Engineering Research Center for Information Technology in Agriculture

Spectral reflectance in the near-infrared （NIR） shoulder （750-900 nm） region is affected by internal leaf structure, but it has rarely been investigated. In this study, a dehydration treatment and three paraquat herbicide applications were conducted to explore how spectral reflectance and shape in the NIR shoulder region responded to various stresses. A new spectral ratio index in the NIR shoulder region （NSRI）, defined by a simple ratio of reflectance at 890 nm to reflectance at 780 nm, was proposed for assessing leaf structure deterioration. Firstly, a wavelength-independent increase in spectral reflectance in the NIR shoulder region was observed from the mature leaves with slight dehydration. An increase in spectral slope in the NIR shoulder would be expected only when water stress developed sufficiently to cause severe leaf dehydration resulting in an alteration in cell structure. Secondly, the alteration of leaf cell structure caused by Paraquat herbicide applications resulted in a wavelength-dependent variation of spectral reflectance in the NIR shoulder region. The NSRI in the NIR shoulder region increased significantly under an herbicide application. Although the dehydration process also occurred with the herbicide injury, NSRI is more sensitive to herbicide injury than the water-related indices （water index and normalized difference water index） and normalized difference vegetation index. Finally, the sensitivity of NSRI to stripe rust in winter wheat was examined, yielding a determination coefficient of 0.61, which is more significant than normalized difference vegetation index （NDVI）, water index （WI） and normalized difference water index （NDWI）, with a determination coefficient of 0.45, 0.36 and 0.13, respectively. In this study, all experimental results demonstrated that NSRI will increase with internal leaf structure deterioration, and it is also a sensitive spectral index for herbicide injury or stripe rust in winter wheat.

关键词： spectral ratio index spectral reflectance vegetation index dehydration paraquat herbicide stripe rust

Genome-Wide Identification and Expression Analysis of the GSK3 Gene Family in Sunflower under Various Abiotic Stresses

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Phyton-International Journal of Experimental Botany 2024年第8期93卷 1839-1850页

作者： Xianwen ji Ziying jiang jichao wang Lili Dong Xinyi Deng Department of Ornamental Horticulture Anhui Agricultural UniversityHefei230061China

Genes in the glycogen synthase kinase 3(GSK3)family are essential in regulating plant response to stressful *** study employed bioinformatics to uncover the GSK3 gene family from the sunflower genome *** expressions of GSK3 genes in different tissues and stress treatments,such as salt,drought,and cold,were assessed using transcriptome sequencing and quantitative real-time PCR(qRT-PCR).The study results revealed that the 12 GSK3 genes of sunflower,belonging to four classes(Classes I–IV),contained the GSK3 kinase domain and 11–13 *** majority of GSK3 genes were highly expressed in the leaf axil and flower,while their expression levels were relatively lower in the *** a result of salt stress,six of the GSK3 genes(HaSK11,HaSK22,HaSK23,HaSK32,HaSK33,and HaSK41)displayed a notable increase in expression,while HaSK14 and HaSK21 experienced a significant *** regard to drought stress,five of the GSK3 genes(HaSK11,HaSK13,HaSK21,HaSK22,and HaSK33)experienced a remarkable rise in *** exposed to cold stress,seven of the GSK3 genes(HaSK11,HaSK12,HaSK13,HaSK32,HaSK33,HaSK41,and HaSK42)showed a substantial increase,whereas HaSK21 and HaSK23 had a sharp *** research is of great importance in understanding the abiotic resistance mechanism of sunflowers and developing new varieties with improved stress resistance.

关键词： Sunflower abiotic stress GSK expression analysis

Interdiffusion behavior between Cr and Zr and its effect on the microcracking behavior in the Cr-coated Zr-4 alloy

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Nuclear Science and Techniques 2021年第12期32卷 1-12页

作者： ji-Shen jiang Dong-Qing wang Ming-Yue Du Xian-Feng Ma Chen-Xue wang Xiu-jie He Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China

High-temperature chromium(Cr)-zirconium(Zr)interdiffusion commonly occurs in Cr-coated zircaloys applied for enhanced accident-tolerant fuel(ATF)clad*** interdiffusion changes the interfacial microstructure and thus the fracture mechanism of the coating under external *** this study,the interdiffusion behavior in a magnetron sputtered Cr coating deposited on a Zr-4 alloy was studied in a vacuum environment at 1160*** addition,the effect of interdiffusion on the microcracking behavior of the Cr coating was determined by in situ three-point bending *** experimental results show that the interdiffusion behavior resulted in the formation of a ZrCr2 layer,accompanied by the consumption of Cr coating and interfacial *** growth of the diffusion layer followed a nearly parabolic law with respect to annealing time,and the residual stress of the annealed coating decreased with increasing annealing *** external loading,a large number of cracks were generated in the brittle interlayer,and some interfacial cracks were formed and grew at the ZrCr2/Zr-4 *** the remarkable microcracks in the ZrCr2 layer,the vacuum-annealed Cr coating has significantly fewer cracks than the original coating,mainly because of the recrystallization of the coating during annealing.

关键词： Accident-tolerant fuel Surface coating Interdiffusion Three-point bending test Crack propagation