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Ferrite features in simulated transition zone of EH36 shipbuilding steel submerged arc welded by CaF_(2)-SiO_(2)-MnO fluxes

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Journal of Iron and Steel Research International 2024年第4期31卷 790-796页

作者： ming Zhong Dong Hu da-ming guo Somnath Basu Cong Wang Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Metallurgical Engineering and Materials Science Indian Institute of Technology BombayMumbai 400076MaharashtraIndia

Ferrite features in the simulated transition zone welded with CaF_(2)-SiO_(2)-MnO fluxes containing various MnO contents have been *** laser scanning microscopy has been applied to simulate the thermal cycling of the transition zone and the phase transformations during cooling have been in-situ *** has been found that the appearance temperature for ferrite side plate decreases with increasing Mn content in the weld metals caused by MnO content ***,growth rates for both ferrite side plate and acicular ferrite are significantly enhanced with a higher Mn content of weld ***,from the statistical fractions of salient microstructures,for all samples,the acicular ferrite,grain boundary ferrite,and polygonal ferrite take over more than 90%.It has also been demonstrated that with the increase in Mn content,the ferrite side plate fraction increases slightly from 5%to 10%and the acicular ferrite fraction shows a tendency of first increasing and then decreasing,which experiences the maximum with the flux containing 30 wt.%*** phenomenon is believed to be controlled by the O and Mn contents in weld metals synergistically.

关键词： Submerged arc welding Transition zone Phase transformation Microstructure

Soil Properties and Yield of Jerusalem Artichoke(Helianthus tuberosus L.)with Seawater Irrigation in North China Plain

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Pedosphere 2008年第2期18卷 195-202页

作者： ZHAO Geng-Mao LIU Zhao-Pu CHEN ming-da guo Shi-Wei College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 （China）

Irrigation with various dilutions of seawater can act as an alternate water resource and thus plays an important role in saving freshwater resources as well as promoting agriculture in the coastal semi-arid areas of the North China Plain. Jerusalem artichoke （Helianthus tuberosus L.） grown in a field experiment was irrigated with seawater diluted with freshwater from 2001 to 2003 to determine the feasibility of seawater irrigation in the Laizhou area. For treatments of CK （non-irrigation） along with seawater concentrations of 25%, 50%, and 75%, total dissolved solid （TDS） in the non-irrigated soil significantly increased （P ≤ 0.05） in both 2002 and 2003 and was 1.3 times higher in 2003 than in 2001. In the 25% and 50% seawater concentration treatments, TDS in 2001 was significantly greater （P ≤ 0.05） than CK; however, TDS in these two treatments decreased by 34.9% and 40.1%, respectively, in 2003 compared with 2001. The sodium adsorption ratio （SAR） remained below 10 mmol^1/2 L^-1/2, indicating that alkalization was low with seawater irrigation. In 2001 and 2002, compared to CK and the irrigation treatment with 75% seawater, irrigation with 25% and 50% seawater increased the yields of Jerusalem .artichoke. This meant that Jerusalem artichoke could be safely grown in salt-affected land of Laizhou area with 25% and 50% seawater irrigation.

关键词： Jerusalem artichoke North China Plain SAR seawater irrigation soil total dissolved solids

Catalytic Performance of Carbon Smoke over Ag-LSCF Composite Catalysts

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 30-34页

作者： guo Guanlun HAN ming LU Shaomin YU Jing JU Hongling 无 Hubei Key Laboratory of Advanced Technology for Automotive Components&Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China College of Mechanical and Transportation Southwest Forestry UniversityKunming 650000China

To improve the catalytic performance of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3)(LSCF)towards carbon soot,we utilized the impregnation method to incorporate Ag into the prepared LSCF *** conducted a series of characterization tests and evaluated the soot catalytic activity of the composite catalyst by comparing it with the LaCoO_(3) group,LaFeO_(3) group,and catalyst-free *** results indicate that the Ag-LSCF composite catalyst exhibits the highest soot catalytic activity,with the characteristic temperature values of 376.3,431.1,and 473.9℃at 10%,50%,and 90%carbon soot conversion,*** values are 24.8,20.2,and 23.1℃lower than those of the LSCF *** also shows that LSCF can improve the catalytic activity of soot after compounding with Ag,and reflects the necessity of using catalysts in soot combustion *** characterization and BET test show that Ag-LSCF has more abundant surface-adsorbed oxygen species,larger specific surface area and pore volume than LSCF,which also proves that Ag-LSCF has higher soot catalytic activity.

关键词： metallic composites carbon smoke oxidation perovskite catalyst soot

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键合型掺铒纳米晶-聚合物波导放大器的制备

中国光学 2017年第2期10卷 219-225页

作者：李彤张美玲王菲张大明汪国平深圳大学电子科学与技术学院广东省微纳光机电工程技术重点实验室光电子器件与系统教育部/广东省重点实验室广东深圳518060 吉林大学电子科学与工程学院集成光电子学国家重点联合实验室吉林大学实验区吉林省光通信用聚合物波导器件工程实验室吉林长春130012

为了克服主客掺杂型有源材料均匀性和稳定性差的问题,采用键合掺杂方法,将高温热解法制备的油酸修饰掺铒氟钇钠纳米晶粒与甲基丙烯酸甲酯发生共聚反应,形成键合型有源芯层材料。纳米晶粒均匀固定在聚合物分子链上,抑制了高浓度掺杂时的... 详细信息

为了克服主客掺杂型有源材料均匀性和稳定性差的问题,采用键合掺杂方法,将高温热解法制备的油酸修饰掺铒氟钇钠纳米晶粒与甲基丙烯酸甲酯发生共聚反应,形成键合型有源芯层材料。纳米晶粒均匀固定在聚合物分子链上,抑制了高浓度掺杂时的团聚析出且材料更稳定。纳米粒子在聚合物中的质量百分比达到约1wt%,具有良好的成膜性,用原子力显微镜照片观察薄膜表面粗糙度为1.76 nm。用椭偏仪测量薄膜光学性质,并用柯西色散模型拟合出薄膜折射率随波长的变化关系,材料在1550 nm信号光波长的折射率为1.485。设计嵌入式波导结构,采用有限元方法进行模式分析和计算光场强度分布。采用紫外光刻和感应耦合等离子体刻蚀工艺制备凹槽形下包层,填充有源材料制备条形波导放大器。实验结果表明,当1550 nm信号光功率为0.1mW,1480 nm泵浦光功率为390 mW时,在1.2 cm长的样品中得到了3.58 d B的信号光相对增益。

关键词：光波导放大器集成光学器件聚合物光增益

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网格监控系统研究

计算机科学 2003年第9期30卷 144-147,151页

作者：黄达明李国东张德富南京大学计算机软件新技术国家重点实验室南京210093

1.引言网格是以资源共享为目的,支持对可计算资源的远程和并发访问,用高速网络连接的地理上分布的可计算资源所组成的一个具有单一系统映像的高性能计算和信息服务环境.

关键词：网格监控系统集群系统网络资源标准化体系结构

A versatile synthetic strategy towards rare earth based metal-organic frameworks

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Science China Chemistry 2025年

作者： Quan Shi Yun-Hao Xu ming-Hui Chen Peng Zhao Wen-Bo Deng Ji Xiong Kai guo Ya-Qing Feng Bao Zhang School of Chemical Engineering and Technology Tianjin University Tianjin Collaborative Innovation Center of Chemical Science and Engineering Guangdong Laboratory Chemistry & Fine Chemical Industry Jieyang Center

Rare earth metal-organic frameworks (RE-MOFs) have drawn wide attention owing to diverse network structures and various application ***,due to the unpredictable formation of the nodes,it is still challenging to design novel RE-MOFs.A novel versatile strategy was developed employing a RE-acetate complex (RE2(CH3COO)6·4H2O) as a precursor to construct RE-MOFs.2D RE-MOFs (RE-DBP) and 3D RE-MOFs (RE-TCPP) could be obtained by using dicarboxylic porphyrin ligands H2DBP and tetracarboxylic porphyrin ligands H2TCPP,*** RE-MOFs were further synthesized to verify the universality of the *** crystalline RE-MOFs could also be prepared at room temperature via the developed strategy,which could significantly promote large-scale preparation and practical application of *** proof of the concept,the performance of porphyrin-based RE-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the RE-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic performance,which was also greater than that of the corresponding 3D MOF Tb-TCPP(Co) due to the optimal 2D structure and thus the accelerated photogenerated charge separation and transfer *** work not only provides a novel versatile strategy to design and develop RE-MOFs,but also proposes a promising approach for the potential bulk production of RE-MOFs at room temperature.

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Palladium installed copper-organic framework for C–C coupling reactions

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Science China Chemistry 2025年

作者： Yu-Mei Wang Mei-Xia Tao Kai-ming Mo Xu Chen Shu-Hua Zhong Elena S Shubina guo-Hong Ning dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences

The formation of C–C bonds is a crucial aspect of organic synthesis. Synthesists' long-term objective is to identify novel catalysts to optimize reaction systems based on traditional transition metal catalysis. This study explores the synthesis and catalytic potential of palladium-installed covalent metal-organic frameworks(CMOFs) based on copper cyclic trinuclear units(Cu-CTUs). By incorporating palladium ions into the imine-based framework JNM-7 through a straightforward immersion method, we achieved a notable enhancement in catalytic activity for critical C–C coupling reactions, including C–H arylation and Sonogashira cross-coupling. The resulting JNM-7-Pd demonstrated remarkable stability and recyclability, maintaining its efficiency over at least three cycles without any decline in efficiency.

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富血小板纤维蛋白通过Wnt/β-catenin信号通路促进BMSCs成骨分化的研究

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口腔颌面外科杂志 2016年第6期26卷 393-398页

作者：杨世茂郭延伟李大鲁王明国济南市口腔医院山东济南250001 济宁市口腔医院山东济宁232000 山东大学附属济南市中心医院山东济南250013

目的 :研究富血小板纤维蛋白(PRF)通过Wnt/β-catenin信号通路对骨髓基质干细胞(BMSCs)分化的影响。方法:分离、培养原代兔BMSCs,取第三代细胞进行干细胞鉴定,收集同一只兔耳缘静脉血离心制备PRF,将PRF与BMSCs置于Transwell小室中共培... 详细信息

目的 :研究富血小板纤维蛋白(PRF)通过Wnt/β-catenin信号通路对骨髓基质干细胞(BMSCs)分化的影响。方法:分离、培养原代兔BMSCs,取第三代细胞进行干细胞鉴定,收集同一只兔耳缘静脉血离心制备PRF,将PRF与BMSCs置于Transwell小室中共培养并进行成骨分化。实验分组:A组为单纯BMSCs对照组;B组为PRF与BMSCs共培养组;C组为加入DKK1的PRF与BMSCs共培养组;D组为加入Wnt3a的PRF与BMSCs共培养组。茜素红染色观察各组钙结节形成情况,碱性磷酸酶(ALP)试剂盒检测各组ALP活性,定量聚合酶链反应(q RT-PCR)检测成骨成脂相关基因Runx2、OCN、PPARγ2及LPL的m RNA表达,同时检测Wnt/β-catenin信号通路关键因子Cyclin D1及β-catenin的m RNA表达。结果:流式细术检测结果显示,原代培养的BMSCs符合间充质干细胞鉴定标准。茜素红染色结果显示,B组和D组的钙结节数量明显多于A组和C组,A组和C组之间无明显差异。碱性磷酸酶(ALP)活性检测结果显示,B组与D组的ALP活性较A组和C组明显增加(P<0.05),且两组之间差异无明显统计学意义。q RTPCR结果显示B组与D组中的成骨分化标志基因Runx2、OCN的m RNA表达,较A组和C组显著增加(P<0.05),而成脂分化标志基因PPARγ2、LPL的m RNA表达显著降低(P<0.05)。此外,B组和D组中Wnt/β-catenin信号通路关键因子Cyclin D1及β-catenin的m RNA表达较A组和C组显著增加(P<0.05)。结论:PRF通过激活Wnt/β-catenin信号通路促进BMSCs成骨分化而抑制其成脂分化。

关键词：富血小板纤维蛋白骨髓基质干细胞成骨分化成脂分化 Wnt/β-catenin信号通路

A Mn-porphyrinic metal–organic framework immobilizing glucose oxidase for combined photodynamic/chemodynamic/starvation therapy

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Tungsten 2025年第1期 183-194页

作者： Xin-Ran Sun Hao-ming Yuan guo-da Zhang Chao Wang Shu-Juan Sun Peng-Fei Shi Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers School of Chemistry and Chemical Engineering Linyi University

The combination of photodynamic therapy（PDT） and chemodynamic therapy（CDT） in tumor treatment has attracted considerable ***,tumor hypoxia and glutathione（GSH） overproduction in the tumor tissue restricted the progress of their ***,a Mn-porphyrinic metal-organic framework（Mn-TCPP） was constructed by the one-pot method and further used for immobilizing glucose oxidase（GOx） to obtain GOx@*** would rapidly exhaust endogenous glucose into hydrogen peroxide（H2O2） and gluconic acid,thus shutting off the energy supply of tumor cells for starvation ***-TCPP catalyzed H2O2to produce oxygen,regulating the hypoxic tumor microenvironment and in turn improving1O2generation under laser ***,Mn-TCPP can reduce reactive oxygen species consumption owing to the redox reaction between Mn3+and GSH,thus greatly enhancing ***,benefiting from GOx-mediated starvation therapy,Mn2+produced by Mn3+reduction can react with sufficient intracellular H2O2to generate ·OH with high cytotoxicity through a Fenton-like *** treatment by GOx@Mn-TCPP under laser irradiation in vitro,the cell viability of 4T1 and A549 tumor cells reached to 20%,reflecting GOx@Mn-TCPP could give full play to the advantages of PDT/CDT/starvation *** results in vivo demonstrated that GOx@Mn-TCPP mediated synergistic cascade therapy could significantly inhibit tumor growth and improve the therapeutic effect.

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