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Effects of scandium chloride on osteogenic and adipogenic differentiation of mesenchymal stem cells

Journal of Rare Earths 2022年第1期40卷 161-168页

作者： na ren Xin Yu Aizhu Wang na Liang Zhichao Feng Chunhui Sun Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinan 250022China School of Biological Science and Technology University of JinanJinan 250022China

Mesenchymal stem cells(MSCs)are multi-potent cells that are able to differentiate and mature into various types of cells under a certain microenvironment for cell therapy and tissue ***(Sc),an important rare earth element,recently has been intensively investigated in biomedical fields as well as industrial engineering,and chloride channels have been proven to be able to affect osteogenic ***,it is significant to investigate effects of ScCl_(3)on cell activities of *** this paper,rat bone MSCs(rBMSCs)were co-cultured with various concentrations of ScCl_(3)(1×10^(-8),1×10^(-6),and 1×10^(-4)mol/L)to evaluate their influence on cell proliferation as well as osteogenic and adipogenic differentiation in *** results indicate that ScCl_(3)promotes the proliferation of rBMSCs initially,which is yet reduced upon ion *** used immunofluorescence staining,quantitative real time polymerase chain reactions,and assays measuring alkaline phosphatase activity,mineralized deposits,and intracytoplasmic lipids to reveal that rBMSCs treated with ScCl_(3)at concentrations of 1×10^(-8)-1×10^(-6)mol/L can enhance levels of osteogenic differentiation in a dosedependent manner and reduce adipogenic differentiation to a certain degree through Wnt/β-catenin signaling *** results indicate that appropriate concentrations of ScCl_(3)can improve osteogenic differentiation in the lineage commitment of rBMSCs,and thus,promote bone *** study implies that ScCl_(3) possesses great potentials in the treatment of bone diseases and would provide new strategy of designing composites by SiCl3 doping for biomedical applications in the future.

关键词： Scandium Mesenchymal stem cells Osteogenic differentiation Adipogenic differentiation Dose-dependent effects Wnt/3-catenin signaling pathway

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A new algorithm based on C-V characteristics to extract the epitaxy layer parameters for power devices with the consideration of termination

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Chinese Physics B 2021年第4期30卷 616-628页

作者： Jiupeng Wu na ren Kuang Sheng College of Electrical Engineering Zhejiang UniversityHangzhou 310027China Hangzhou Innovation Center Zhejiang UniversityHangzhou 311200China

Doping concentration and thickness of an epitaxy layer are the most essential parameters for power *** conventional algorithm extracts these two parameters by calculating the doping profile from its capacitance-voltage(C-V)*** an algorithm treats the device as a parallel-plane junction and ignores the influence of the *** epitaxy layer doping concentration tends to be overestimated and the thickness *** order to obtain the epitaxy layer parameters with higher accuracy,a new algorithm applicable for devices with field limited ring(FLR)terminations is proposed in this *** new algorithm is also based on the C-V characteristics and considers the extension manner of the depletion region under the FLR *** an extension manner depends on the design parameters of the FLR termination and is studied in detail by simulation and *** analytical expressions of the device C-V characteristics and the effective doping profile are *** accurate epitaxy layer parameters can be extracted by fitting the effective doping profile expression to the C-V doping profile calculated from the C-V *** relationship between the horizontal extension width and the vertical depth of the depletion region is also *** credibility of the new algorithm is verified by *** applicability of our new algorithm to FLR/field plate combining terminations is also *** new algorithm acts as a powerful tool for analyses and improvements of power devices.

关键词： C-V characteristics doping concentration epitaxy layer thickness field limited ring termination

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Enhanced degradation of refractory organics in ORR-EO system with a blue TiO_(2)nanotube array modified Ti-based Ni-Sb co-doped SnO_(2)anode

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Chinese Chemical Letters 2024年第8期35卷 391-395页

作者： Yifen He Chao Qu na ren Dawei Liang Department of Materials Chemistry School of Materials Science&EngineeringBeihang UniversityBeijing 102206China Department of Environmental Science Faculty of Environment&LifeBeijing University of TechnologyBeijing 100124China

Recently,a novel 2-electron oxygen reduction reaction(ORR)based electro-oxidation(EO)system was developed,which utilizes a H_(2)O_(2)generation cathode instead of H_(2)evolution cathode.A Ti-based Ni-Sb co-doped SnO_(2)(Ti/naTO)anode was selected for efficient degradation of refractory organics and O_(3)*** synergistic reaction of O3/H_(2)O_(2)further accelerated the generation of hydroxyl radicals(·OH)in the ORR-EO ***,the catalytic activity and long-term effectiveness of the Ti/naTO anode limited the large-scale application of the ORR-EO *** this study,a blue TiO_(2)nanotube array(blue-TiO_(2)-NTA)inter-layer was introduced into the fabrication process between the Ti substrate and naTO catalyst *** to the Ti/naTO anode,the Ti/blue-TiO_(2)-NTA/naTO anode achieved higher efficiency of organic removal and O_(3)***,the accelerated lifetime of the Ti/blue-TiO_(2)-NTA/naTO anode was increased by 7 times compared to the Ti/naTO *** combined with CNTs-C/PTFE air cathode in ORR-EO system,all anodic oxidation and O_(3)/H_(2)O_(2)processes achieved higher•OH *** 92%of TOC in leachate bio-effluent was effectively eliminated with a relatively low energy cost of 45 kWh/t.

关键词： Electro-oxidation Blue TiO_(2)nanotube array O_(3)/H_(2)O_(2)process Refractory organics Leachate bio-effluent

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A novel spectrophotometric determination of copper(Ⅱ) with bromosulphonazoⅢ

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Chinese Chemical Letters 2008年第1期19卷 92-94页

作者： Li Yuan Shu Hui Huo Xiao na ren Hui Chen Chemistry ＆ Chemical Engineering College Northwest Normal University Lanzhou 730070 China

A novel chromogenic reaction involving copper（Ⅱ） and bromosulphonazo Ⅲ （Br-SAZⅢ） in hexamethylenetetramine- hydrochloric buffer solution was investigated. The results showed that a blue complex of copper（Ⅱ） and bromosulphonazo Ⅲ was formed with a molar ratio of 1：1. The apparent molar absorptivity was 3.3×10^5Lmol-1cm-1 and the maximum absorption peak was at 616.8 nm. The proposed procedure was used for quantitative estimation of Cu（II） in the concentration range of 0-1.024μg/mL with the detection limit （3σ） of 7.03 × 10^-4 μg/mL （n = 20）. The relative standard deviations （RSDs） were 0.56-4.68%. Under the optimized conditions, total copper in the vegetables and tea was successfully determined. 2007 Li Yuan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： Spectrophotometry Bromosulphonazo Ⅲ Copper(Ⅱ) Vegetable Tea

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Synthesis and Characterization of pH-Responsive Block Copolymers with Primary Amine Groups

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Chemical Research in Chinese Universities 2013年第2期29卷 389-395页

作者： WANG Hong ZHU Yue-jun ren Xiao-na ZHANG Hong TAN Ye-bang Key Laboratory of Special Functional Aggregated Materials Ministry of Education School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China State Key Laboratory of Offshore Oil Exploitation Technology Research Department of Research Center China National Offshore Oil Corporation Beijing 100027 P R. China

A new pH-responsive block copolymer, methoxy poly（ethylene glycol）-b-poly[5-methacrylamido- pentylamine hydrochloride]（mPEG-b-PMAAPA） was synthesized and characterized in this paper. The monomer 5-methacrylamido-pentylamine hydrochloride（MAAPA） and the macroinitiator（mPEG-ACVA） were synthesized, re- spectively, and mPEG-b-PMAAPA was then obtained by free radical polymerization. The structure and molecular weight of mPEG-b-PMAAPA were cont]rmed by hydrogen nuclear magnetic resonance（~H NMR） spectroscopy and gel permeation chromatography with multiangle laser light scattering（GPC-MALLS） measurements. At a low pH, it is hydrophilic due to the protonation of the primary amine groups. With increasing pH value, deprotonation occurs and the hydrophobicity of PMAAPA block increases. This molecular feature leads to interesting aggregation behavior of mPEG-b-PMAAPA in aqueous solutions at different pH values as revealed by dynamic light scattering（DLS） measurements, transmission electron microscopy（TEM） observations and resonance light scattering（RLS） measure- ments.

关键词： Block copolymer Polyamine pH-Responsive Water soluble copolymer

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Pair Production in an Intense Laser Pulse: The Effect of Pulse Length

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Chinese Physics Letters 2012年第7期29卷 47-50页

作者： ren na WANG Jia-Xiang LI An-Kang WANG Ping-Xiao State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062 Key Laboratory of Applied Ion Beam Physics Laboratory(Ministry of Education)and Institute of Modern Physics Department of Nuclear Science and TechnologyFudan UniversityShanghai 200433

Production of positron-electron (e^(+) e^(-) ) pairs in an intense laser pulse is investigated by solving the Dirac equation with analytical and numerical *** observe that the probability of the pair production will firstly decrease slowly as the pulse length T becomes *** it will increase until T is reduced to the Compton time Tc =(h)/(mec) ≈ 1.29 × 10^(-21)s and finally decrease exponentially to ***,for a prominent pair production,we not only require that the electric field strength should be higher than the Schwinger critical value Ecr =m^(2)c^(3)/(e(h)) ≈ 1.32 × 10^(16) V/cm,but also that the pulse duration T should be larger than *** latter is shown to be related to momentum requirement for the *** fields with different pulse lengths,the phase and chirp influences upon the pair production are also explored.

关键词： transition Pulse slowly

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Analgesic effects and structural elucidation of two new flavone C-glycosides from Artemisa sacrorum

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Chinese Journal of natural Medicines 2015年第10期13卷 786-790页

作者： WANG Qing-Hu HAN na-ren-Chao-Ke-Tu DAI na-Yin-Tai WU Rong-Jun WU Jie-Si College of Traditional Mongolian Medicine Inner Mongolia University for Nationalities

The present study was designed to isolate and characterize the analgesic compounds of Artemisa sacrorum Ledeb. The Et OAc crude extracts from the aerial parts of Artemisa sacrorum Ledeb were separated by chromatography and the structures of new compounds were elucidated based on spectral analyses. Analgesic activities of the isolated compounds were assessed in rats with hot plate test and paw pressure assay. Two new flavone C-glycosides, named as Sacroroside A and B(Compounds 1 and 2) were isolated from the Et OAc crude extract of the aerial parts of Artemisa sacrorum Ledeb. They showed significant analgesic effects. In conclusion, Compounds 1 and 2 are new natural products, which show significant analgesic effects in a dose-dependent manner.

关键词： Artemisa sacrorum Ledeb Sacroroside A Sacroroside B Analgesic effect

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Full filling of mesoporous carbon nanotubes by aqueous solution at room temperature

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Chinese Physics B 2019年第3期28卷 304-308页

作者： Xiao-na ren Min Xia Qing-Zhi Yan Chang-Chun Ge School of Materials Science and Technology University of Science and Technology Beijing

Carbon nanotubes(CNTs) have the ideal structure to be used as templates for nanomaterials, especially for nanowires,and the tungsten nanowire is an important nanomaterial that is used as a strengthening phase. Therefore, we have proposed to apply mesoporous CNT(mCNT) as a template to prepare tungsten nanowires. However, the tungsten precursor should fill the hollow tube of mCNT firstly, and very few related studies have been reported. In this paper, we have systematically studied the filling process of ammonium metatungstate(AMT) aqueous solution. The results reveal that owing to the mesopores in the mCNT sidewall, the AMT can be encapsulated into the tube at room temperature(RT) and we can fully fill it without destroying the structure. In addition, vibration and solute concentration are also important factors. Besides,the mesoporous sidewall and hollow tubular core structure of mCNT are prerequisites to realize full filling. Furthermore,tungsten nanowires have been obtained after reduction of AMT in mCNTs.

关键词： mesoporous carbon nanotube(mCNT) capillarity aqueous solution tungsten nanowire

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Sn/n3O4-x heterostructure rich in oxygen vacancies with enhanced visible light photocatalytic oxidation performance

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 150-159页

作者： Rui-qi Yang na Liang Xuan-yu Chen Long-wei Wang Guo-xin Song Yan-chen Ji na ren Ya-wei Lü Jian Zhang Xin Yu Institute for Advanced Interdisciplinary Research(IAIR) University of JinanJinan 250022China School of physics and electronics Hunan UniversityChangsha 410082China Institute Charles Gerhardt UMR 5253CNRS-UM-ENSCMUniversitéde MontpellierPlace Eugène BataillonF-34095 Montpellier cedex 5France

Sn3O4, a common two-dimensional semiconductor photocatalyst, can absorb visible ***, owing to its rapid recombination of photogenerated electron-hole pairs, its absorption is not sufficient for practical *** this work, a Sn nanoparticle/Sn3O4-x nanosheet heterostructure was prepared by in situ reduction of Sn3O4 under a H2 *** Schottky junctions formed between Sn and Sn3O4-x can enhance the photogenerated carrier separation *** the hydrogenation process, a portion of the oxygen in the semiconductor can be extracted by hydrogen to form water, resulting in an increase in oxygen vacancies in the *** heterostructure showed the ability to remove Rhodamine *** cytocompatibility experiments proved that Sn/Sn3O4-x can significantly enhance cell compatibility and reduce harm to *** work provides a new method for the fabrication of a Schottky junction composite photocatalyst rich in oxygen vacancies with enhanced photocatalytic performance.

关键词： photocatalysis tin oxide oxygen vacancy Schottky junction photodegradation

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Ferromagnetic coupling in a two-dimensional Cairo pentagonal Ni_(2)(TCNQ)_(2) lattice

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Journal of Materiomics 2022年第3期8卷 627-632页

作者： Aizhu Wang Hongguang Wang Xiaopeng Wang na ren Longhua Ding Xin Yu Mingwen Zhao Institute for Advanced Interdisciplinary Research University of JinanJinanShandong250022China Qingdao Institute for Theoretical and Computational Sciences Shandong UniversityQingdaoShandong266237China School of Physics and State Key Laboratory of Crystal Materials Shandong UniversityJinanShandong250100China

Magnetism has revolutionized important technologies,and continues to bring forth new phenomena in emergent materials and reduced ***,using first-principles calculations,we demonstrate that the already-synthesized two-dimensional(2D)Ni-tetracyanoquinodimethane(Ni_(2)(TCNQ)_(2))lattice is a stable ferromagnetism material with multiple spin-polarized Dirac *** conical bands in proximity of the Fermi level can be tuned by external tensile strain and show the fourfold degenerate electronic states at the critical tensile strain of~2.35%,whose energy dispersion is consistent with 2D Cairo pentagonal *** addition,spin-orbital coupling can open a band gap at the Dirac point of A,leading to topologically nontrivial electronic states characterized by the non-zero Chern number and the edge states of *** results offer versatile platforms for the realization of massless spintronics with full-spin polarization in 2D Cairo pentagonal Ni_(2)(TCNQ)_(2) Lattice.

关键词： First-principles calculations Ferromagnetic coupling Linear dispersion 2D Cairo pentagonal lattice Quantum anomalous Hall effect

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