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Gel electrophoresis as a nanoseparation tool serving DNA nanotechnology

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Chinese chemical Letters 2015年第12期26卷 1435-1438页

作者： Hui-Qiao Wang Zhao-Xiang Deng College of chemistry and Pharmaceutical engineering Nanyang Normal University department of chemistry University of Science and Technology of China

The past years have witnessed a rapid development of DNA nanotechnology in nanomaterials science with a central focus on programmable material construction on the nanoscale. An efficient method is therefore highly desirable（but challenging） for analytical/preparative purification of DNA-conjugated nano-objects and their DNA-assemblies. In this regard, agarose gel electrophoresis, a traditional technique that has been invented for biomacromolecule separation, has found many innovative *** includes shape, size, charge, and ligand-valence separations of nanoparticle building blocks as well as monitoring a self-assembly process towards product identification and purification.

关键词： nanotechnology DNA assembly programmable challenging valence serving conjugated innovative desirable

GC/MS analyses of fractionated extraction of Shenfu coal with CS2,n-hexane,benzene

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Journal of Coal Science & engineering(China) 2008年第4期14卷 672-674页

作者：王晓华魏贤勇 department of chemistry and chemical engineering Xi'an University of Science and TechnologyXi'an 710054China School of chemical engineering China University of Mining and TechnologyXuzhou 221008China

Shenfu coal was extracted with 0S2, n-hexane, benzene sequentially. The extracts were analyzed with GC/MS. It is presented that group seperation of soluble organic compounds in the coal can be achieved by fractionated extraction using different solvents. Main components in CS2 soluble fraction from Shenfu coal are alkyl-substituted arenes. Aliphatic hydrocarbons are overwhelmingly predominant in n-hexane-soluble fraction. Dito tricyclic aramatic hydrocarbons are identified in benzene-soluble fraction. The molecular structures detection of 2, 4, 6-trichlorobenzenamine and 3, 3＇, 4, 4＇, 5, 5＇-hexachloro-1, 1＇- biphenyl and 2-chlorocyclohexanol firstly provide information for existence form of chlorine in coal.

关键词： solvent fractionated extraction chemical constituent GC/MS

Diatomic active sites nanozymes:Enhanced peroxidase-like activity for dopamine and intracellular H2O2 detection

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Nano Research 2022年第5期15卷 4266-4273页

作者： Shan Wang Zunfu Hu Qiulian Wei Huimin Zhang Weina Tang Yunqiang Sun Haiqiang Duan Zhichao Dai Qingyun Liu Xiuwen Zheng Key Laboratory of Functional Nanomaterials and Technology in Universities of Shandong College of Chemistry and Chemical EngineeringLinyi UniversityLinyi 276000China School of chemical and Biological engineering Shandong University of Science and TechnologyQingdao 266510China School of Materials Science and engineering Linyi UniversityLinyi 276000China

Considering intracellular hydrogen peroxide(H_(2)O_(2))plays pivotal roles in the regulation of serial biological processes,the in-situ detection of intracellular H2O2 has attracted an extensive *** the present work,an atomically dispersed diatomic active sites Nanozymes(FeN_(3)/PtN_(4)-single-atom nanozymes(SAzyme))was prepared exhibiting enhanced peroxidase-like *** obvious synergistic effect between Fe-Pt heteronuclear diatomic active sites was confirmed by series of characterization and density functional theory(DFT).The peroxidase-like activity of Fe-sites could be substantially enhanced by the bonded Pt-sites via the modulation *** a consequence,the gap between the d-band centre(εd)of Fe 3d orbitals and the Fermi energy level was narrowed and the electronic interaction could be strengthened,leading to a lower free energy barrier and a lower activation energy as well as fortified metal-O bonding in the kinetic ***,the constructed FeN3/PtN4-SAzyme exhibited higher peroxidase-like activity than that of *** FeN3/PtN4-SAzyme-assisted oxidation of 3,3',5,5'-tetramethylbenzidine(TMB)facilitated the colorimetric detection of dopamine(DA),an important *** linear detection range and limit of detection(LOD)of DA and H_(2)O_(2) were 1-10 μM,0.01-1.0 mM and 0.109 μM,7.97 μM,*** addition,the constructed SAzymes were also applied for the in-situ detection of intracellular H2O2,expanding the application scope of the newborn SAzymes.

关键词： single-atom nanozymes heteronuclear diatomic active sites peroxidase-like dopamine intracellular H_(2)O_(2)

LOCAL DISCONTINUOUS GALERKIN METHOD FOR ELLIPTIC INTERFACE PROBLEMS

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Acta Mathematica Scientia 2017年第5期37卷 1519-1535页

作者：张志娟蔚喜军常延贞 department of Mathematics Nanchang University Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics department of Mathematics Beijing University of Chemical Technology

In this paper,the minimal dissipation local discontinuous Galerkin method is studied to solve the elliptic interface problems in two-dimensional *** interface may be arbitrary smooth *** is shown that the error estimates in L;-norm for the solution and the flux are O（h;|log h|）and O(h|log h|;),*** numerical experiments,the successive substitution iterative methods are used to solve the LDG *** results verify the efficiency and accuracy of the method.

关键词： elliptic interface problem minimal dissipation local discontinuous Galerkin method error estimates

Experimental Investigation of Thermal Performance of Novel Finned Radiators for Automotive Cooling System

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Journal of Thermal Science 2024年第5期33卷 1726-1743页

作者： SINGH Hardeep TING David S-K READER Graham ESHTIAGHI Nicky ICHIYANAGI Mitsuhisa SUZUKI Takashi Turbulence&Energy Laboratory University of WindsorWindsor N9B 3P4Canada chemical and Environmental engineering School of EngineeringRMIT UniversityMelbourneVictoria 3001Australia department of engineering and applied Sciences Sophia UniversityTokyo 102-8554Japan

This research investigates innovative fin-type radiators for automobile engine cooling ***-channel and helical radiators,along with straight type,were analyzed for heat transfer characteristics under various *** uniqueness of this study is evident in the design of microchannel and helical *** helical radiators,the inner rod features 4/8 helical-shaped water galleries,while the outer tube frame with embedded fins remains *** contrast,the microchannel radiators have compact trapezoidal-shaped water galleries with separate fin ***,the novelty of the research is enhanced by the utilization of 3D printing technology in the manufacturing *** constant fin height analysis at varied water and air flow rate,Microchannel Water Air Radiator with fin height 10.5 mm(MCWAR10.5)depicted a higher heat transfer rate amongst the *** comparison to Straight Water Air Radiator with fin height 9.5 mm(SWAR9.5),the heat transfer rate is 30.3%and 1.3 times ***,in constant fin surface area analysis,microchannel radiator(MCWAR3.2)illustrates lower heat dissipation than Helical radiator(HWAR138)but higher than HWAR134 and Straight radiator(SWAR6).The examination of pumping loss indicated that the Micro-channel radiator outperformed helical radiators due to its lower pressure *** average pressure loss for Micro-channel radiators was 0.74 kPa,making it 1.2 times higher than that of a straight radiator(0.62 kPa),indicating a better trade-off.

关键词： heat exchangers multi-channel helical heat exchanger heat transfer 3D printing

Performance of Ni-Cu bimetallic co-catalyst g-C3N4 nanosheets for improving hydrogen evolution

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Journal of Materials Science & Technology 2020年第14期47卷 144-156页

作者： Zhiliang Jin Lijun Zhang School of chemistry and chemical engineering North Minzu UniversityYinchuan 750021China Ningxia Key Laboratory of Solar chemical Conversion Technology North Minzu UniversityYinchuan 750021China Key Laboratory for chemical engineering and Technology State Ethnic Affairs CommissionNorth Minzu UniversityYinchuan 750021China

The Ni-Cu bimetallic nanoparticles were successfully anchorred on the surface of g-C3N4 nanosheets by a simple heat treatment process which was applied to the photocatalytic hydrogen evolution *** introduction of Ni-Cu could significantly improve the photocatalytic hydrogen evolution performance compared with pure g-C3N4 in the system sensitized by eosin Y under a visible irradiation *** hydrogen production activity of the composite reached 104.4μmol(2088.28μmol g^-1 h^-1)after using the Ni Cu double promoter strategy,which was 24.3 times higher than *** excellent electrical conductivity of the bimetallic Ni-Cu and the close interfacial contact between Ni Cu and g-C3N4 played an important role for increasing the charge transfer *** were also the reasons of more efficient charge separation,which ultimately led to a significant promotion on the photocatalytic hydrogen production ***-Cu/g-C3N4 coupling with a close Schottky interface between metal and semiconductor which enhanced H2-evolution performance and TEOA oxidation *** work provided a new way to load Ni Cu bimetallic nanoparticles in situ onto g-C3N4 and a reference on relative semiconductor materials.

关键词： Bimetallic Ni-Cu g-C3N4 Charge separation Hydrogen evolution

Fatigue Resistance of Filled NR with PMMA-Wrapped and Rare Earth-Doped Alumina-Siloxane Gel

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Journal of Rare Earths 2002年第4期20卷 278-281页

作者：张明邱关明周兰香陈海燕 Inoue Shinich OKAMOTO Hiroshi department of chemistry and chemical engineering Yangzhou University Yangzhou 225002 China Changchun College of Optics & Fine Mechanics Changchun 130022 China Aichi Institute of Technology Toyota 470-0392 Japan

Poly (methyl methacrylate) (PMMA) was used to wrap alumina-siloxane sol which was produced by water glass, aluminum nitrate and α-methacrylic acid, and as a result, alumina-siloxane gel wrapped by PMMA was obtained. Meanwhile, rare earth ions were employed to dope in the course of reaction, and the formed rare earth doped PMMA microcapsule powder was filled into natural rubber (NR). It is found through the analysis of mechanical properties that Young′s modulus universally improves and a remarkable resistance to fatigue is displayed. Retention rate of tensile strength is twice that of the controlled sample after ten thousand times of extension fatigue.

关键词： rare earths alumina-siloxane sol natural rubber(NR) mechanical properties resistance to fatigue

Apoptosis-enhanced ferroptosis therapy of pancreatic carcinoma through PAMAM dendrimer-iron(Ⅲ)complex-based plasmid delivery

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Science China chemistry 2022年第4期65卷 778-788页

作者： Wenjing Ma Yue Gao Zhijun Ouyang Yu Fan Hongwei Yu Mengsi Zhan Han Wang Xiangyang Shi Mingwu Shen State Key Laboratory for Modification of chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China department of Radiology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China

The development of promising strategies to improve the treatment efficacy of pancreatic carcinoma still remains to be a challenging *** report here the development of a new dendrimer-based nanomedicine formulation to tackle pancreatic carcinoma through apoptosis-enhanced ferroptosis *** this article,G5 dendrimers were partially modified with a Fe(Ⅲ)chelator hydroxyquinoline-2-carboxylic acid(8-HQC)on their periphery,entrapped with gold nanoparticles(Au NPs)within their internal cavities,and chelated with Fe(Ⅲ).The thus created dendrimer-entrapped Au NPs(Fe-Au DENP-HQC)with an Au core size of 1.9 nm and 20.0 Fe(Ⅲ)ions complexed per dendrimer are stable,have a pH-dependent Fe(Ⅲ)release profile,and can generate reactive oxygen species under the tumor microenvironment(TME)and effectively compact plasmid DNA encoding p53 protein to form polyplexes with a hydrodynamic size of 143.9 nm and a surface potential of 33.6 *** show that cancer cells treated with the created Fe-Au DENP-HQC/p53 polyplexes can be more significantly inhibited through vector-mediated chemodynamic therapy(CDT)effect via Fe(Ⅲ)-induced Fenton reaction and the p53 gene delivery-boosted cell apoptosis and oxidative stress in the TME than single-mode CDT and gene *** investigations using a xenografted tumor model validated the effectiveness of apoptosis-enhanced ferropotosis therapy through the downregulation of GPX-4 and SLC7A11proteins,upregulation of p53 and PTEN proteins,as well as histological ***,the dendrimer nanoplatform enabled tumor fluorescence imaging through gene delivery-mediated enhanced green fluorescent protein *** Fe(Ⅲ)-complexed dendrimer vector system may be developed as a promising theranostic nanoplatform for ferroptosis or ferroptosis-based combination therapy of other cancer types.

关键词： dendrimers ferroptosis gene delivery pancreatic carcinoma fluorescence imaging

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Recent Progress in Fluorescent Formaldehyde Detection Using Small Molecule Probes

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Journal of Analysis and Testing 2022年第2期6卷 204-215页

作者： Jiao-Jiao Zheng Wen-Cai Liu Feng-Niu Lu Ying Tang Zhi-Qin Yuan College of chemistry Beijing University of Chemical TechnologyBeijing 100029China department of chemistry and chemical engineering Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Plant Resources Research and Development Beijing Technology and Business UniversityBeijing 100048China

Formaldehyde(FA,a typical reactive carbonyl species)is a well-known environmental pollutant and a disease-related biomarker,making its sensitive and selective detection *** probes have been explored for FA perception in environment,intracellular media and in *** this review,we majorly conclude the recently represented fluorescence FA analysis based on small molecule *** general FA sensing mechanisms are first *** the FA detection in various environments,sensing tactics and performances are discussed in order of natural environment,living cells and in *** the end,this review discusses the challenges and future trends of FA detection based on fluorescent probes.

关键词： Formaldehyde Small molecule probe Fluorescence detection Environmental monitoring Intracellular analysis In vivo imaging