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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang Xuheng Chen Junfang Bao qiuyue hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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原料配比对铁焦冶金性能和微观结构的影响机制

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钢铁研究学报 2024年第9期36卷 1163-1173页

作者：郝秋月王炜王杰鲍俊芳段临风李佳武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室湖北武汉430081 武汉科技大学钢铁冶金新工艺湖北省重点实验室湖北武汉430081 宝钢股份中央研究院炼铁技术研究所上海201999 武汉科技大学冶金装备及其控制教育部重点实验室湖北武汉430081 武汉科技大学机械传动与制造工程湖北省重点实验室湖北武汉430081 武汉科技大学精密制造研究院湖北武汉430081

铁焦是高炉实现低碳炼铁的主要潜在技术之一。分析了不同原料配比下铁焦的抗拉强度、机械强度和热性能的演化特性。同时,结合光学显微镜、SEM-EDS、BET和XRD等表征手段分析了原料配比对铁焦显微组织、孔结构和碳结构的影响机制。研究结... 详细信息

铁焦是高炉实现低碳炼铁的主要潜在技术之一。分析了不同原料配比下铁焦的抗拉强度、机械强度和热性能的演化特性。同时,结合光学显微镜、SEM-EDS、BET和XRD等表征手段分析了原料配比对铁焦显微组织、孔结构和碳结构的影响机制。研究结果表明,铁焦中较低的孔隙率和更均匀的孔隙结构有助于提高其抗拉强度。当铁矿粉质量分数超过10%后,铁焦机械强度显著降低。综合考虑铁焦的机械强度和热性能,铁矿粉的添加量(质量分数)不宜超过15%。通过调整1/3焦煤添加量来优化铁焦的冶金性能,当添加量(质量分数)在20%~22%时,铁焦机械强度达到了二级焦的等级。铁焦反应性随着1/3焦煤含量的增加呈现先降后升的趋势,其深层原因是碳结构与微孔结构的变化。

关键词：低碳炼铁铁焦微观结构抗拉强度冶金性能

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Self-assembly of metal-cholesterol oxidase hybrid nanostructures and application in bioconversion of steroids derivatives

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Frontiers of Chemical Science and Engineering 2021年第3期15卷 615-629页

作者： Yu Xin qiuyue Gao Yu Gu Mengyao hao Guangming Fan Liang Zhang Key Laboratory of Industry Biotechnology(Ministry of Education) School of BiotechnologyJiangnan UniversityWuxi 214122China National Engineering Laboratory for Cereal Fermentation Technology Jiangnan UniversityWuxi 214122China

A cholesterol oxidase(COD)was hybridized with Ca^(2+),Zn^(2+),Al^(3+),Fe^(2+) and Mn^(2+).After precipitation with PO_(4)^(3-) at 4℃ for 72 h,the resulting pellets were *** scanning electron microscopy assays,the metal-COD complexes revealed flower-like or granular structures after *** transform infrared spectroscopy assay revealed the characteristic peaks of both the enzyme and metal materials.X-ray diffraction analysis indicated that COD was encapsulated in CaHPO_(4)·2H_(2)O-,Zn_(3)(PO_(4))_(2)·4H_(2)O-,AlPO_(4-),FeP_(4-) and Mn_(3)(PO_(4))_(2)·3H_(2)O-based nanostructures,*** scanning calorimetry assay indicated significant increases in thermo-denaturation temperatures from 60.5℃ to 167.02℃,167.02℃,137.70℃,172.85℃ and 160.99℃,*** steroid derivatives as substrates,this enzyme could convert cholesterol,pregnenolone,dehydroepiandrosterone,ergosterol,b-sitosterol and stigmasterol to related single *** in metal-based nanostructures could significantly enhance the initial conversion ratio and reaction stability of the *** addition,substrate selectivity could be affected by various metal ***,using Ca^(2+),Zn^(2+),Al^(3+),Fe^(2+) and Mn^(2+) as hybrid raw materials could help to encapsulate COD in related metal-enzyme nanostructures,and could help to promote the stability and tolerant properties of the enzyme,while also enhancing its catalytic characteristics.

关键词： cholesterol oxidase metal-enzyme hybridization nanostructures sterol derivatives bioconversion

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Tunable Dynamic Black Phosphorus/Insulator/Si Heterojunction Direct-Current Generator Based on the Hot Electron Transport

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Research 2019年第1期2019卷 157-166页

作者： Yanghua Lu Sirui Feng Runjiang Shen Yujun Xu Zhenzhen hao Yanfei Yan haonan Zheng Xutao Yu qiuyue Gao Panpan Zhang Shisheng Lin College of Microelectronics College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Modern Optical Instrumentation Zhejiang UniversityHangzhou 310027China

Static heterojunction-based electronic devices have been widely applied because carrier dynamic processes between semiconductors can be designed through band gap ***,we demonstrate a tunable direct-current generator based on the dynamic heterojunction,whose mechanism is based on breaking the symmetry of drift and diffusion currents and rebounding hot carrier transport in dynamic ***,the output voltage can be delicately adjusted and enhanced with the interface energy level engineering of inserting dielectric *** the ultrahigh interface electric field,hot electrons will still transfer across the interface through the tunneling and hopping *** particular,the intrinsic anisotropy of black phosphorus arising from the lattice structure produces extraordinary electronic,transport,and mechanical properties exploited in our dynamic heterojunction ***,the voltage of 6.1 V,current density of 124.0 A/m^(2),power density of 201.0 W/m^(2),and energy-conversion efficiency of 31.4%have been achieved based on the dynamic black phosphorus/AlN/Si heterojunction,which can be used to directly and synchronously light up light-emitting *** direct-current generator has the potential to convert ubiquitous mechanical energy into electric energy and is a promising candidate for novel portable and miniaturized power sources in the in situ energy acquisition field.

关键词： interface heterojunction phosphorus

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Interfacial Built-In Electric Field-Driven Direct Current Generator Based on Dynamic Silicon Homojunction

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Research 2020年第1期2020卷 935-943页

作者： Yanghua Lu qiuyue Gao Xutao Yu haonan Zheng Runjiang Shen Zhenzhen hao Yanfei Yan Panpan Zhang Yu Wen Guiting Yang Shisheng Lin College of Microelectronics College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China Wuxi Branch of Jiangsu Province Special Equipment Safety Supervision and Inspection Institute Wuxi 214071China State Key Laboratory of Space Power Technology Shanghai Institute of Space Power SourcesShanghai 200245China State Key Laboratory of Modern Optical Instrumentation Zhejiang UniversityHangzhou 310027China

Searching for light and miniaturized functional device structures for sustainable energy gathering from the environment is the focus of energy society with the development of the internet of *** proposal of a dynamic heterojunction-based direct current generator builds up new platforms for developing in situ ***,the requirement of different semiconductors in dynamic heterojunction is too complex to wide applications,generating energy loss for crystal structure ***,dynamic homojunction generators are explored,with the same semiconductor and majority carrier *** experiments reveal that the majority of carrier directional separation originates from the breaking symmetry between carrier distribution,leading to the rebounding effect of carriers by the interfacial electric ***,NN Si homojunction with different Fermi levels can also output the electricity with higher current density than PP/PN homojunction,attributing to higher carrier *** current density is as high as 214.0 A/m^(2),and internal impedance is as low as 3.6 kΩ,matching well with the impedance of electron ***,the N-i-N structure is explored,whose output voltage can be further improved to 1.3V in the case of the N-Si/Al2O3/N-Si structure,attributing to the enhanced interfacial *** approach provides a simple and feasible way of converting low-frequency disordered mechanical motion into electricity.

关键词： interfacial dynamic gathering

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RIPK1 plays a crucial role in maintaining regulatory T-Cell homeostasis by inhibiting both RIPK3-and FADD-mediated cell death

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Cellular & Molecular Immunology 2024年第1期21卷 80-90页

作者： Xiaoxue Deng Lingxia Wang Yunze Zhai qiuyue Liu Fengxue Du Yu Zhang Wenxing Zhao Tingtao Wu Yiwen Tao Jie Deng Yongbing Cao Pei hao Jiazi Ren Yunli Shen Zuoren Yu Yuejuan Zheng Haibing Zhang Haikun Wang State Key Laboratory of Cardiology Shanghai East HospitalTongji University School of MedicineShanghai200120China CAS Key Laboratory of Molecular Virology and Immunology Shanghai Institute of Immunity and InfectionChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai200031China CAS Key Laboratory of Nutrition Metabolism and Food SafetyShanghai Institute of Nutrition and HealthShanghai Institutes for Biological SciencesUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai200031China The Research Center for Traditional Chinese Medicine Shanghai Institute of Infectious Diseases and BiosecurityShanghai University of Traditional Chinese MedicineShanghai201203China Institute of Vascular Disease Shanghai TCM-Integrated HospitalShanghai University of Traditional Chinese MedicineShanghai200433China

Regulatory T(T_(reg))cells play an essential role in maintaining immune balance across various physiological and pathological ***,the mechanisms underlying T_(reg)homeostasis remain incompletely ***,we report that RIPK1 is crucial for T_(reg) cell survival and *** generated mice with T_(reg) cell-specific ablation of Ripk1 and found that these mice developed fatal systemic autoimmunity due to a dramatic reduction in the Treg cell compartment caused by excessive cell *** conventional T cells,Treg cells with Ripk1 deficiency were only partially rescued from cell death by blocking FADD-dependent ***,simultaneous removal of both Fadd and Ripk3 completely restored the homeostasis of Ripk1-deficient Treg cells by blocking two cell death ***,our study highlights the critical role of RIPK1 in regulating Treg cell homeostasis by controlling both apoptosis and necroptosis,thereby providing novel insights into the mechanisms of Treg cell homeostasis.

关键词： Treg cell Homeostasis Apoptosis Necroptosis

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北京市绿隔地区生态环境质量变化与驱动因素分析——以“基于自然的解决方案”为视角

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北京大学学报（自然科学版） 2024年第5期60卷 935-944页

作者：张豪习皓龙嘉骞郑秋月冯长春中国电建集团贵阳勘测设计研究院有限公司贵阳550081 北京大学城市与环境学院北京100871

引入“基于自然的解决方案”(NBS)视角,借助空间计量模型,分析绿隔地区的生态环境质量变化及其驱动因素,得到以下结果:1)从生态环境质量变化看,2005—2020年,绿隔地区整体上呈现先下降后回升的趋势,空间上圈层格局明显;2)两道绿隔地区... 详细信息

引入“基于自然的解决方案”(NBS)视角,借助空间计量模型,分析绿隔地区的生态环境质量变化及其驱动因素,得到以下结果:1)从生态环境质量变化看,2005—2020年,绿隔地区整体上呈现先下降后回升的趋势,空间上圈层格局明显;2)两道绿隔地区的生态环境质量变化趋势不同,第一道绿隔地区相对更低,且一直延续下降趋势,第二道绿隔地区2015年后止降回升;3)从驱动因素看,NBS措施对绿隔地区生态环境质量改善具有驱动作用,其中绿色基础设施在两道绿隔地区都表现出显著的驱动作用,而生态基础设施仅在第二道绿隔地区表现出显著的驱动作用。北京市进入减量发展新阶段以来,绿隔地区的生态环境质量明显改善。未来可以更有针对性地应用NBS措施,进一步提升城市生态环境质量,完善城市绿色空间体系建设。

关键词：生态环境质量基于自然的解决方案驱动因素绿隔地区北京

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Effective Production of Dehydrogenation-Streptopyrrole from Streptomyces armeniacus CGMCC 7129 by Combination of Response Surface Methodology and Purification with High Performance Countercurrent Chromatography(HPCCC)

Effective Production of Dehydrogenation-Streptopyrrole from ...

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中国生物工程学会第六次全国会员代表大会暨第九届学术年会

作者：袁博 Chun-xia Yan Ye-Yan Qiu Sheng Qin qiuyue Zhang Yun-xin hao Xiu-Yun Ju Ji-Hong.Jiang 江苏师范大学江苏省药用植物生物技术重点实验室 State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural University Department of Biology and microbiology South Dakota State University The Key Laboratory of Biotechnology for Medicinal Plant of Jiangsu Provice Jiangsu Normal University School of Biology Science Jiangsu Normal University

Dehydro-streptopyrrole(DS) is a new class chemical of dehydrobenzoxazin that was first found in the endophytic streptomyces Streptomyces armeniacusi CGMCC *** has a more widely antimicrobial spectrum than ***,we found that metal ions(Pb,Mn,Cu and Cd) could improve the output of *** order to meet its sample supply for further in vivo pharmacological investigation,an efficient method was developed for the preparation of DS by a combination of response surface methodology(RSM) and preparative high performance liquid chromatography(PHPLC) from strain CGMCC *** heavy metal ion content in the culture was optimized by the RSM to enhance DS *** results revealed a model(P<0.0001) that was highly significant and this could consequently be utilized for optimizing *** maximum concentration of DS was measured at 800.00,382.31,599.97 and 600.00 μM levels of Pb,Mn,Cu and Cd,*** the optimized fermentation conditions,DS production was 75.36 μg/mL compared to 17.44 μg/mL under the original standard fermentation ***,a rapid and efficient method for the separation and purification of DS from crude culture extract was developed using high performance countercurrent chromatography(HPCCC).The liquid phase solvent system employed for HPCCC separation was composed of nhexane-ethyl acete-methanol-water(5:7:6:5,v/v).The isolation was accomplished within 140 min and the significantly purity of DS was over 97%.Collectively,we have therefore established the new technique of production and fast-separation of DS.

关键词： Streptomyces armeniacus Dehydrogenation-streptopyrrole(DS) Response surface methodology High performance countercurrent chromatography

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N,N′-双(2-吡啶甲酰胺)-1,4-二乙烯三胺稀土配合物的合成、表征及与DNA作用的研究

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中国稀土学报 2010年第2期28卷 141-146页

作者：王娜贺新前林秋月郝仕油朱红娟浙江师范大学化学与生命科学学院化学系浙江金华321004 浙江师范大学物理化学研究所浙江省固体表面反应化学重点实验室浙江金华321004

首次合成了四种N,N′-双(2-吡啶甲酰胺)-1,4-二乙烯三胺(L=C16H19N5O2)稀土配合物。经过元素分析、红外光谱、热重分析和摩尔电导值的分析,确定配合物的组成为[Ln(H3L)(NO3)2].NO3.C l3.3H2O,(Ln=La(Ⅲ),Eu(Ⅲ),Gd(Ⅲ),Ho(Ⅲ))。光谱测... 详细信息

首次合成了四种N,N′-双(2-吡啶甲酰胺)-1,4-二乙烯三胺(L=C16H19N5O2)稀土配合物。经过元素分析、红外光谱、热重分析和摩尔电导值的分析,确定配合物的组成为[Ln(H3L)(NO3)2].NO3.C l3.3H2O,(Ln=La(Ⅲ),Eu(Ⅲ),Gd(Ⅲ),Ho(Ⅲ))。光谱测试结果表明:配体中两个酰胺基氧和两个吡啶氮分别与稀土离子配位,两个硝酸根均为双齿配体,稀土离子的配位数为8,Ln(Ⅲ)与H3L形成了1∶1的配合物。另外,进一步采用荧光光谱、表面增强拉曼光谱和粘度法研究了系列配合物与DNA的作用情况。研究结果表明,系列配合物与DNA之间存在相互作用,其作用模式主要为沟面结合和静电作用。

关键词：稀土配合物 2-吡啶甲酰胺二乙烯三胺表面增强拉曼光谱 DNA作用

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不同信号通路对牙周膜干细胞成骨分化的影响

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中国组织工程研究 2023年第24期27卷 3910-3919页

作者：付秋月兰兴明徐溶蔚王浩杨琨遵义医科大学贵州省遵义市563000

背景:牙周膜干细胞作为牙源性间充质干细胞的一种,具有成骨分化潜能,可应用于牙周组织再生修复,而牙周膜干细胞的成骨分化涉及多种信号通路的调控。目的:综述目前已研究因子介导的与牙周膜干细胞成骨分化相关的信号通路及其对成骨分化... 详细信息

背景:牙周膜干细胞作为牙源性间充质干细胞的一种,具有成骨分化潜能,可应用于牙周组织再生修复,而牙周膜干细胞的成骨分化涉及多种信号通路的调控。目的:综述目前已研究因子介导的与牙周膜干细胞成骨分化相关的信号通路及其对成骨分化的影响。方法:在PubMed和中国知网数据库,设置检索时间为2010-2022年,总结了2010年以来与牙周膜干细胞成骨分化相关的8个信号通路的研究进展,最终纳入60篇文献进行分析讨论。结果与结论:(1)牙周膜干细胞作为牙源性间充质干细胞,具有良好的增殖、自我更新及多向分化潜能的特点;作为牙周组织再生修复的种子细胞,牙周膜干细胞应用于牙周炎的治疗具有广阔的前景。(2)目前已有大量研究证实各类因子与牙周膜干细胞成骨分化之间的潜在关系是通过介导各信号通路产生,虽然各信号通路在促进牙周膜干细胞成骨分化方面均有一定作用,但研究最多的是MAPK信号通路和Wnt信号通路。(3)MAPK信号通路包括4条途径,广泛存在于细胞中,对于调节细胞的增殖及分化发挥着重要作用;经典的Wnt/β-连环蛋白通路是控制骨稳态的最重要信号通路之一,已有大量研究证实其与牙周膜干细胞成骨分化存在相关性。(4)目前大多数研究仅通过体外矿化实验证实了某些因子可以激活MAPK信号通路和经典的Wnt/β-连环蛋白通路,提高矿化基因的表达,进而促进牙周膜干细胞成骨分化,但对于这些通路如何被激活,以及该通路影响牙周膜干细胞成骨分化的具体机制还有待进一步研究。(5)不同研究因子介导的各类信号通路的激活或抑制显著地影响了牙周膜干细胞的成骨分化;了解牙周膜干细胞成骨分化相关信号通路,将有利于牙周膜干细胞应用于牙周组织再生,从而有效减少因牙周炎而导致的牙齿脱落。

关键词：牙周膜干细胞成骨分化信号通路牙周炎牙周组织再生修复组织工程综述

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