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Synthesis and characterization of carboxymethyl cellulose/organic montmorillonite nanocomposites and its adsorption behavior for Congo Red dye

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Water Science and Engineering 2013年第3期6卷 272-282页

作者： min-min WANG li WANG College of Material Science and Art Design Inner Mongolia Agricultural University

A series of carboxymethyl cellulose/organic montmorillonite （CMC/OMMT） nanocomposites with different weight ratios of carboxymethyl cellulose （CMC） to organic montmorillonite （OMMT） were synthesized under different conditions. The nanocomposites were characterized by the Fourier transform infrared （FT-IR） spectrophotometer, X-ray diffraction （XRD） method, transmission electron microscope （TEM）, scanning electron microscope （SEM）, and thermal gravimetric （TG） analysis. The results showed that the introduction of CMC may have different influences on the physico-chemical properties of OMMT and intercalated-exfoliated nanostructures were formed in the nanocomposites. The effects of different reaction conditions on the adsorption capacity of samples for Congo Red （CR） dye were investigated by controlling the amount ofhexadecyl trimethyl ammonium bromide （CTAB）, the weight ratio of CMC to OMMT, the reaction time, and the reaction temperature. Results from the adsorption experiment showed that the adsorption capacity of the nanocomposites can reach 171.37 rag/g, with the amount of CTAB being 1.0 cation exchange capacity （CEC） of MMT, the weight ratio of CMC to OMMT being l：l, the reaction time being 6 h, and the reaction temperature being 60~C. The CMC/OMMT nanocomposite can be used as a potential adsorbent to remove CR dye from an aqueous solution.

关键词： carboxymethyl cellulose organic montmorillonite nanocomposite adsorption,Congo Red dye

Plasmon-induced local electric field improved hydrogen evolution reaction on Ag/Mo_(2)C nanosheets

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Nano Research 2025年第1期18卷 270-277页

作者： HuangJingWei li Xin Zi Jun Wu Xinli Wang li Zhu Qiyou Wang Jianfu Han Junwei Fu Hongmei li Kai Huang Yu Chen min liu School of Physics State Key Laboratory of Powder MetallurgyHunan Joint International Research Center for Carbon Dioxide Resource UtilizationCentral South UniversityChangsha 410083China School of Metallurgy and Environment Central South UniversityChangsha 410083China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Nano-Institute Munich Faculty of PhysicsLudwig-Maxilimians-Universität MünchenMünchen 80539Germany Hunan Institute of Advanced Sensing and Information Technology Xiangtan UniversityXiangtan 411105China

Electrocatalytic water splitting offers a promising way for hydrogen production with near-zero ***,such as molybdenum carbides(Mo_(2)C),are promising materials for hydrogen evolution reaction(HER)but still suffer from poor intrinsic water activation ***,we developed a plasmon-induced local electric field(PILEF)strategy to solve this ***(Ag)nanoparticles decorated Mo_(2)C nanosheets(Ag/Mo_(2)C)were successfully prepared by electrostatic *** visible light excited the PILEF on Ag/Mo_(2)C remarkably reducing the activation energy by 92.7 kJ·mol^(-1)from 147.3 kJ·mol^(-1)of Mo_(2)C to 54.6 kJ·mol^(-1).As a result,the plasmonic Ag/Mo_(2)C significantly enhances~2.3-fold of the current density from 2.8 mA·cm^(-2)of Mo_(2)C to 6.5 mA·cm^(-2)at-3 V *** and reduces the overpotential by 104 mV from 403 mV of dark state to 299 mV of light state at the current density of 10 mA·cm^(-2),achieving better performance than reported *** research demonstrates that PILEF enhances HER activities,offering a potential strategy for boosting the intrinsic activities of catalysts.

关键词： sliver particles plasmon effect field effect hydrogen evolution reaction(HER) electrocatalysis

Distributed event region fault-tolerance based on weighted distance for wireless sensor networks

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Journal of Systems Engineering and Electronics 2009年第6期20卷 1351-1360页

作者： li Ping li Hong Wu min School of Information Science and Engineering Central South Univ. Changsha 410083 P. R. China

Event region detection is the important application for wireless sensor networks（WSNs）, where the existing faulty sensors would lead to drastic deterioration of network quality of *** single-moment nodes fault-tolerance, a novel distributed fault-tolerant detection algorithm named distributed fault-tolerance based on weighted distance（DFWD） is proposed, which exploits the spatial correlation among sensor nodes and their redundant *** sensor networks, neighborhood sensor nodes will be endowed with different relative weights respectively according to the distances between them and the central *** syncretized the weighted information of dual-neighborhood nodes appropriately, it is reasonable to decide the ultimate status of the central sensor ***, readings of faulty sensors would be corrected during this *** results demonstrate that the DFWD has a higher fault detection accuracy compared with other algorithms, and when the sensor fault probability is 10%, the DFWD can still correct more than 91% faulty sensor nodes, which significantly improves the performance of the whole sensor network.

关键词： event region detection weighted distance distributed fault-tolerance wireless sensor network.

Nitrobenzene biodegradation ability of microbial communities in water and sediments along the Songhua River after a nitrobenzene pollution event

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Journal of Environmental Sciences 2008年第7期20卷 778-786页

作者： li Zonglai YANG min li Dong State Key Laboratory of Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

More than 100 t of nitrobenzene (NB) and related compounds were discharged into the Songhua River,the fourth longest river in China,because of the world-shaking explosion of an aniline production factory located in Jilin City on November 13,*** one of the efforts to predict the fate of residual NB in the river,NB biodegradation abilities by microbes in the water and sediments from different river sections were evaluated *** results indicated that microbial communities from any section of ...

关键词： nitrobenzene the Songhua River pollution accident biodegradation low temperature

Nonlinear in-plane thermal buckling of rotationally restrained functionally graded carbon nanotube reinforced composite shallow arches under uniform radial loading

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Applied Mathematics and Mechanics(English Edition) 2022年第12期43卷 1821-1840页

作者： Cheng li Chengxiu ZHU C.W.lim Shuang li School of Automotive Engineering Changzhou Institute of TechnologyChangzhou 213032Jiangsu ProvinceChina School of Rail Transportation Soochow UniversitySuzhou 215131Jiangsu ProvinceChina Department of Architecture and Civil Engineering City University of Hong KongTat Chee AveKowloonHong Kong Special Administrative RegionChina

The nonlinear in-plane instability of functionally graded carbon nanotube reinforced composite(FG-CNTRC)shallow circular arches with rotational constraints subject to a uniform radial load in a thermal environment is *** arches with thickness-graded material properties,four different distribution patterns of carbon nanotubes(CNTs)are *** classical arch theory and Donnell’s shallow shell theory assumptions are used to evaluate the arch displacement field,and the analytical solutions of buckling equilibrium equations and buckling loads are obtained by using the principle of virtual *** critical geometric parameters are introduced to determine the criteria for buckling mode *** studies are carried out to demonstrate the effects of temperature variations,material parameters,geometric parameters,and elastic constraints on the stability of the *** is found that increasing the volume fraction of CNTs and distributing CNTs away from the neutral axis significantly enhance the bending stiffness of the *** addition,the pretension and initial displacement caused by the temperature field have significant effects on the buckling behavior.

关键词： functional gradient carbon nanotube(CNT)reinforcement buckling in-plane instability nonlinear

Characteristics of Pre-summer Daytime Cloud Regimes over Coastal South China from the Himawari-8 Satellite

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Advances in Atmospheric Sciences 2022年第12期39卷 2008-2023,I0001-I0015页

作者： mingxin li Yali LUO min min State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster StudiesSun Yat-sen UniversityGuangzhou 519082China

Using the high spatiotemporal resolution(2 km-and-10 min)data from the Advanced Himawari Imager onboard the Himawari-8 satellite,this study documents the fine-scale characteristics of daytime cloud regimes(CRs)over coastal South China during the pre-summer rainy season(April–June).Six CRs(CR1–CR6)are identified based on the joint frequency distribution of cloud top brightness temperature and cloud optical thickness,namely,the optically thin-to-moderate cloud mixture,optically thin warm clouds with cirrus,optically thick warm clouds,weak convective cloud mixture,strong convective clouds,and extreme,deep convective *** optically thick warm clouds are the major CR during April and May,with higher frequencies over land,especially along the urban agglomeration,rather than the offshore which may be an indicator of the higher aerosol concentrations being a contributing factor over the *** CRs with weak convective cloud mixtures and strong convective clouds appear more frequently over the land,while the two CRs with optically thinner clouds occur mainly *** flow patterns(SPs)are objectively identified and examined focusing on those favoring the two major rainproducing CRs(CR5 and CR6)and the highly reflective CR with optically thick warm clouds(CR3).The two SPs favoring CR5 and CR6 are characterized by abundant moisture with low-level jets after monsoon onset,and a northwest highsoutheast low pattern with strong dynamic convergence along the coastline,*** non-convective CR3 with high reflectance is related to a SP that features the western North Pacific subtropical high extending more westward,leading to a moderate moisture supply and a wide range of convective available potential energy,but also,large convective inhibition.

关键词： cloud regime monsoon onset synoptic pattern satellite data spatiotemporal distribution

Polysaccharide from Astragalus membranaceus promotes the activation of human peripheral blood and mouse spleen dendritic cells

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Chinese Journal of Natural Medicines 2021年第1期19卷 56-62页

作者： lim Seong-min Park Hae-Bin Jin Jun-O Department of Medical Biotechnology Yeungnam UniversityGyeongsan 38541South Korea Shanghai Public Health Clinical Center Shanghai Medical CollegeFudan UniversityShanghai201508China

Astragalus membranaceus(***)is a widely used traditional herb in China and *** polysaccharides(AMP),which make up a major part of the root extract,have been shown to modulate immune modulations,especially activation of bone marrow-derived dendritic cells(BMDCs)and T ***,the immune stimulatory effect of AMP in the mouse in vivo and human peripheral blood DCs(PBDCs)has not been well *** this study,we found that intravenous(i.v.)injection of AMP in C57 BL/6 mice induced remarkable elevations in co-stimulatory and MHC class I and II molecule levels in the splenic DCs and its *** stimulatory effect of DCs by AMP was elevated 6 h after treatment,which rapidly decreased 18 h after ***,AMP promoted intracellular production of pro-inflammatory cytokines in spleen DC subsets,which contributed elevation of serum cytokine ***,the AMP promoted PBDC ***,these results demonstrate that AMP can be used as an immune stimulatory molecules in human and mouse.

关键词： Astragalus membranaceus polysaccharide Spleen dendritic cell Human peripheral blood dendritic cell

Rapid Repair of Earthquake Damaged RC Interior Beam-wide Column Joints and Beam-wall Joints Using FRP Composites

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四川大学学报（工程科学版） 2009年第3期41卷 258-265页

作者： li Bing lim Chee Leong Inst. for the Environment Nanyang Technological Univ. Singapore

This paper studies the seismic performance of FRP-strengthened RC interior non-seismically detailed beam-wide columns and beam-wall joints after limited seismic *** eccentric and concentric beam-wide column joints and two beam-wall joints,initially damaged in a previous study,were repaired and tested under constant axial loads(0.1fc′Ag and 0.35fc′Ag) and lateral cyclic *** rapid repair technique developed,aimed to restore the original strength and to provide minimum drift *** repair schemes were characterized by the use of:(a) epoxy injections and polymer modified cementitious mortar to seal the cracks and replace spalled concrete;and(b) glass(GFRP) and carbon(CFRP) sheets to enhance the joint *** FRP sheets were effectively prevented against possible debonding through the use of fiber *** between responses of specimens before and after repair clearly indicated reasonable restoration in strength,drift capacity,stiffness and cumulative energy dissipation *** specimens failed with delamination of FRP sheets at beam-column joint *** rapid repair technique developed in this study is recommended for mass upgrading or repair of earthquake damaged beam-column joints.

关键词： FRP 建筑物抗震设计抗震结构

MDMX phosphorylation-dependent p53 downregulation contributes to an immunosuppressive tumor microenvironment

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Journal of Molecular Cell Biology 2020年第9期12卷 713-722页

作者： Bing Wang Chuan-Bian lim Jiawei Yan lizhen li Jufang Wang John B.little Zhi-min Yuan Key Laboratory of Space Radiobiology of Gansu Province&Key Laboratory of Heavy Ion Radiation Biology and Medicine of Chinese Academy of Sciences Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina University of Chinese Academy of Sciences BeijingChina John B.little Center for Radiation Sciences Harvard T.H.Chan School of Public HealthBostonMAUSA Present address:School of life Sciences and Technology ShanghaiTech UniversityShanghaiChina

A role of tumor-suppressive activity of p53 in the tumor microenvironment(TME)has been implicated but remains fairly *** address this knowledge gap,we leveraged our MdmxS314A mice as recipients to investigate how implanted tumor cells incapacitate host p53 creating a conducive TME for tumor *** found that tumor cell-associated stress induced p53 downregulation in peritumor cells via an MDMX-Ser314 phosphorylation-dependent *** a result,an immunosuppressive TME was developed,as reflected by diminished immune cell infiltration into tumors and compromised macrophage M1 ***,ablation of MDMX-Ser314 phosphorylation attenuated p53 decline in peritumor cells,which was associated with mitigation of immunosuppression and significant tumor growth *** data collectively uncover a novel role of p53 in regulating the tumor immune microenvironment,suggesting that p53 restoration in the TME can be exploited as a potential strategy of anticancer therapy.

关键词： p53 MDMX tumor microenvironment immune cell infiltration macrophage polarization