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High-throughput droplet microfluidic synthesis of hierarchical metal-organic framework nanosheet microcapsules

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Nano Research 2019年第11期12卷 2736-2742页

作者： Songting Wu zhong xin Shicheng Zhao Shengtong Sun Shanghai Key Laboratory of Multiphase Materials Chermical Engineering School of Chemical Engineering East China University of Science and Technology 130 Meilong RoadShanghai 200237China Center for Advanced Low-dimension Materials National Engineering Resarch Center for Dyeing and Finishing of TextilsDonghua Unriversity2999 North Renmin RoadShanghai 201620China

Using two-dimensional(2D)metal-organic framework(MOF)nanosheets as new building blocks to create more complex architectures at the mesoscopic/macroscopic scale has attracted extensive interest in recent ***,it remains a great challenge to assemble MOF nanosheets into hierarchical hollow structures so *** this paper,we describe a successful example of hierarchical MOF nanosheet microcapsules,with precisely controlled sizes,produced on large scale within minutes with a continuous droplet microfluidic *** a reaction/diffusion growth mechanism,the microcapsule shells feature a continuous smooth inner layer and a porous outer *** hierarchical structure enables the encapsulation of magnetite nanoparticles inside and loading of dense gold nanoparticles outside the microcapsules,which exhibit highly efficient heterogeneous catalytic activity and easy *** present microfluidic assembly method offers a new pathway for preparing hierarchical MOF nanosheet structures,with the potential for extension to the formation of other 2D nanosheets in general.

关键词： metal-organic framework nanosheet droplet microfluidics microcapsule hierarchical structure

Effect of arginine on stability of GST-ZNF191(243-368)

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Chinese Chemical Letters 2007年第3期18卷 355-356页

作者： Dong xin Zhao zhong Xian Huang Chemical Biology Lab Department of Chemistry Fudan University Shanghai 200433 China

For better understanding the chemical or biological information of ZNF191 （243-368）, we expressed the fusion protein of GST and ZNF191 （243-368）, and used it to obtain the binding DNA sequence of this zinc finger protein. But in the process of expression and purification, we found this fusion protein slowly degradated. For resolving this problem, we simultaneously added charged amino acids L-Arg and L-Glu to the solution of fusion protein, and demonstrated that this method can dramatically increase the stability of this fusion protein. This method can make the fusion protein suitable for the continuous works, especially for situations where high protein concentration and long-term stability without precipitate and degradation of protein are required.

关键词： ZNF191(243-368) GST Stability L-Arg L-Glu

Induction of Hypersensitive Response and Nonhost Resistance by a Cladosporium fulvum Elicitor CfHNNI1 is Dose-Dependent and Negatively Regulated by Salicylic Acid

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Journal of Integrative Agriculture 2012年第10期11卷 1665-1674页

作者： XU You-ping CHEN Hui-ying ZHOU xin CAI xin-zhong Institute of Biotechnology College of Agriculture and Biotechnology Zhejiang University Center of Analysis and Measurement Zhejiang University Key Laboratory of Molecular Biology of Crop Pathogens and Insects Ministry of Agriculture/Zhejiang University

Nonhost resistance is a phenomenon that enables plants to protect themselves against the majority of potential pathogens, and thus has a great potential for application in plant protection. We recently found that CfHNNI1 （for Cladosporium fulvum host and nonhost plant necrosis inducer 1） is an inducer of plant hypersensitive response （HR） and nonhost resistance. In this study, its functional mechanism was analyzed. CfHNN11 was a single copy gene in C. fulvum genome. The functional ORF of the CfHNN11 cDNA was ATG3-TAG780, which showed homology with genes encoding bZIP transcription factors. The functional ORF included in frame an inner one ATG273-TAG780, which was sufficient to induce HR in plants. CfIINN11 induced plant HR in a dose-dependent manner. CfHNNIl-induced necrosis in NahG transgenic tomato plants was significantly stronger than that in their wild type controls. However, the necrosis in Nr and defl tomato mutants was similar to that in their corresponding wild type plants. These data demonstrate that induction of HR and nonhost resistance by CfHNNI1 is negatively regulated by salicylic acid signalling pathway but independent of ethylene and jasmonic acid signalling pathways.

关键词： CfHNNI1 Cladosporium fulvum ethylene hypersensitive response jasmonic acid nonhost resistance salicylic acid

Mass to light ratio of galaxies and gravitational lensing

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Research in Astronomy and Astrophysics 2013年第9期13卷 1041-1051页

作者： Nan Li Ran Li xin-zhong Er National Astronomical Observatories Chinese Academy of Sciences

We investigate the potential of constraining the mass to light ratio of field galaxies using weak lensing shear and flexions. A suite of Monte Carlo simulations are used to generate weak lensing observations with different noise models. Using mock data, we find that the inclusion of flexions can improve the estimate of foreground halo parameters, but the details are strongly dependent on noise in the model. In the intrinsic noise limit, both shear and flexions are promising tools to study the mass to light ratio of galaxies. However, if the noise model of flexions follows the form described by Rowe et al., there is only - 5% improvement in the constraints even with next generation lensing observations.

关键词： cosmology: dark matter -- galaxies: halos -- gravitational lensing

Polybenzoxazine/organosilicon composites with low dielectric constant and dielectric loss

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Chinese Journal of Chemical Engineering 2023年第12期64卷 241-249页

作者： Manlin Yuan xin Lu Xiaoyun Ma Hao Lin Angui Lu Liyan Shao zhong xin State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

The evolution of electronic communication technology raises higher requirements for low dielectric constant(low-k)*** this,a benzoxazine functional organosilicon(HP-aptes)with dense Si—O—Si crosslinking networks and large sterically hindered tert-butyl groups was prepared by the sol–gel ***,a series of polybenzoxazine composites(PPHP)were prepared from intrinsically low dielectric constant bis-functional benzoxazine monomer(P-aptmds)and *** double crosslinking networks of polybenzoxazine and organosilicon further increased the crosslinking density and decreased the dipole density of composites,which endowed the composites with enhanced low-k *** the content of HP-aptes is 30%(mass),the crosslinking density was 2.05×10^(-3)mol·cm^(-3),while that of PP-aptmds was 3.31×10^(-3)mol·cm^(-3).In addition,the dielectric constant and dielectric loss of PPHP composite at 1 MHz could reach 2.61 and 0.0056,respectively.

关键词： Polybenzoxazine Organosilicon Composite Dielectric constant

miR-181b promotes the oncogenesis of renal cell carcinoma by targeting TIMP3

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BIOCELL 2022年第5期46卷 1309-1317页

作者： YUHUA ZOU LEI ZHANG xin zhong Department of Urology First Affiliated Hospital of Gannan Medical UniversityGanzhou341000China Department of Urology The First People’s Hospital of Xiangtan CityXiangtan411101China Department of General Surgery Shenzhen SAMII Medical CenterShenzhen518118China

Renal cell carcinoma(RCC)has a poor prognosis due to limited diagnosis and ***,it is necessary to find novel prognostic biomarkers and therapeutic *** aberrant expression of microRNAs plays an important role in RCC *** inhibitors of metalloproteinase 3(TIMP3)acts as a downstream target of *** aim of this study was to understand the role and molecular mechanism of miR-181b in RCC *** results showed that miR-181b expression was significantly higher in RCC tumour tissues,especially in those with significant invasion or ***-181b overexpression promoted proliferation and migration of the RCC cell line 786-O,while miR-181b knockdown had the opposite *** addition,miR-181b was inversely correlated with TIMP3 expression in RCC tumour ***-181b overexpression reduced TIMP3 expression in RCC cell line 786-O or OS-RC-2,while miR-181b knockdown had the inverse ***,a luciferase reporter assay confirmed the binding sites of miR-181b on the 3’-UTR of TIMP3,confirming the targeting effect of miR-181b on ***,miR-181b promotes the development and progression of RCC by targeting TIMP3 expression,indicating the potential use of miR-181b in the diagnosis and treatment of RCC.

关键词： microRNA microRNA-181b Tissue inhibitors of metalloproteinase 3 Renal cell carcinoma 3’-UTR region

Continuous-flow synthesis and crystal modification of Pigment Red 53

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Chinese Chemical Letters 2023年第8期34卷 153-157页

作者： Yuxin Mao Changlu Zhou Chaoying Wang zhong xin Shanghai Key Laboratory of Multiphase Materials Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

In this study,a continuous-flow procedure containing four steps has been developed to synthesize Pigment Red 53 and modify its crystal *** process avoided the problems of conveying highly insoluble reaction intermediates by removing intermediate operating *** optimization,the overall yield of Pigment Red 53:1 reached 97.1%in the total residence time of 80 s by this diazotizationcoupling-laking-crystal transition *** batch to continuous flow,the purity of products increased from 97.1%to 98.2%and the median diameter of pigment particles decreased from 14μm to 1.9μ*** process achieved a similar crystal transition effect in 18 s as in batch,producingα,δandνcrystals of Pigment Red 53:2 as *** conclusion,this continuous-flow procedure displays advantages in both synthesis and crystal transition,indicating another potential use for industrial application.

关键词： C.I.Pigment Red 53 Continuous synthesis Process optimization Crystal modification

Understanding and improving Yangtze River Basin summer precipitation prediction using an optimal multi-Physics ensemble

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Frontiers of Earth Science 2024年第1期18卷 256-277页

作者： Yang ZHAO Fengxue QIAO xin-zhong LIANG Jinhua YU Climate Environment and Sustainability CenterNanjing University of Information Science and TechnologyNanjing 210044China Key Laboratory of Geographic Information Science(Ministry of Education) East China Normal UniversityShanghai 200241China School of Geographic Sciences East China Normal UniversityShanghai 200241China Department of Atmospheric and Oceanic Science University of MarylandCollege Park MD 20740USA Earth System Science Interdisciplinary Center University of MarylandCollege Park MD 20740USA Key Laboratory of Meteorological Disaster(KLME)(Ministry of Education)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD) Nanjing University of Information Science and TechnologyNanjing 210044China

This study employs the regional Climate-Weather Research and Forecasting model(CWRF)to first investigate the primary physical mechanisms causing biases in simulating summer precipitation over the Yangtze River Basin(YRB),and then enhance its predictive ability through an optimal multi-physics ensemble *** CWRF 30-km simulations in China are compared among 28 combinations of varying physics parameterizations during 1980−***-term average summer biases in YRB precipitation are remotely correlated with those of large-scale *** teleconnections of biases are highly consistent with the observed correlation patterns between interannual variations of precipitation and circulations,despite minor shifts in their primary action *** YRB precipitation aligns with a southward shifted East Asian westerly jet,an intensified low-level southerly flow south of YRB,and a south-eastward shifted South Asian high,alongside higher moisture availability over ***,decreased YRB precipitation corresponds to an opposite circulation *** CWRF control configuration using the ensemble cumulus parameterization(ECP),compared to other cumulus schemes,best captures the observed YRB precipitation characteristics and associated circulation *** ECP with the Morrison or Morrison-aerosol microphysics and the CCCMA or CAML radiation schemes enhances the overall CWRF *** to the control CWRF,the ensemble average of these skill-enhanced physics configurations more accurately reproduces YRB summer precipitation’s spatial distributions,interannual anomalies,and associated circulation *** Bayesian Joint Probability calibration to these configurations improves the ensemble’s spatial distributions but compromises its interannual anomalies and teleconnection *** findings highlight substantial potential for refining the representation of climate system physics to improve YRB precipitation *** is notabl

关键词： physics parameterization regional climate model downscaling skill enhancement multi-physics ensemble teleconnection bias reduction

Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane composite

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Frontiers of Chemical Science and Engineering 2009年第2期3卷 167-171页

作者： Jiangbo WANG zhong xin State Key Lab of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

The thermal degradation behaviors of poly-carbonate/polymethylphenylsilsesquioxane(FRPC)com-posites were investigated by thermogravimetric analysis(TGA)under isothermal conditions in nitrogen *** isothermal kinetics equation was used to describe the thermal degradation *** results showed that activation energy(E),in the case of isothermal degradation,was a quick increasing function of conversion(α)for polycarbonate(PC)but was a strong and decreasing function of conversion for *** the isothermal condition,the addition of polymethylphenylsilsesquioxane(PMPSQ)retardanted the thermal degradation and enhanced the thermal stability of PC during the early and middle stages of thermal *** also indicated a possible existence of a difference in nucleation,nuclei growth,and gas diffusion mechanism in the thermal degradation process between PC and ***,the addition of PMPSQ influenced the lifetime of PC,but the composite still met the demand in manufacturing and application.

关键词： polycarbonate polymethylphenylsilsesquiox-ane thermal degradation kinetics activation energy life-time