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journal of Materials Science & Technology 2022年第7期102卷 213-223页

作者： Z.W.Wang j.F.Zhang G.M.Xie L.h.Wu h.Zhang P.Xue D.R.Ni B.L.Xiao Z.Y.Ma Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819China

Ultrahigh-strength quenching and partitioning(Q&P) steels have attracted strong interests in the auto manufactory,while the comprehensive understanding in the microstructure and mechanical behavior of their welded joints is highly needed to enrich their *** the present work,it is designed to make an insight into these imperative *** strength Q&P 1180 steel joints to parent metal were successfully fabricated via friction stir welding(FSW) technique under different parameters. Apparent hardening and softening were observed in stir zone(SZ) and heat-affected zone(hAZ) respectively,whose microstructures strongly depended on the peak temperature and cooling rate during *** formation of fresh martensite was the main mechanism for the SZ hardening,while the decomposition of metastable phases played key roles in the microhardness drop of the hAZ.A heat source zone-isothermal phase transition layer model was proposed to clarify the impregnability of the joint strength under parameter *** dual-phase structure,nano-carbide particles,tempered initial martensite,and ultrafine-grained ferrite synergistically improved the strain hardening ability of the hAZ,which eventually resulted in the equal strength FSW joints.

关键词： Ultrahigh-strength Q&P steel Friction stir welding Microstructure Mechanical property Strain hardening

Electrochemical Oxidative Csp^3—h/S—h Cross-Coupling with hydrogen Evolution for Synthesis of Tetrasubstituted Olefins

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Chinese journal of Chemistry 2019年第6期37卷 547-551,I0002页

作者： Fangling Lu Zengzhuan Yang Tao Wang Tianhao Wang Yuying Zhang Yong yuan Aiwen Lei National Research Center for Carbohydrate Synthesis Jiangxi Province's Key Laboratory of Chemical BiologyJiangxi Normal UniversityNanchangJiangxi 330022China College of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchangJiangxi 330022China College of Chemistry and Molecular Sciences the Institute for Advanced Studies (IAS)Wuhan UniversityWuhanHubei 430072China

Tetrasubstituted olefins are significant scaffolds as they are prevalent in many biologically active compounds and versatile building blocks for organic synthesis. herein, we report an electrochemical oxidative Csp^3—h/S—h cross-coupling reaction, in which various tetrasubstituted olefins were prepared under base-free, transition metal-free, and oxidants-free reaction conditions.

关键词： electrochemistry C-h activation cross-coupling radical reactions synthetic methods

Ultrasound-assisted synthesis and preliminary bioactivity of novel 2h-1,2,4-thiadiazolo[2,3-a]pyrimidine derivatives containing fluorine

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Chinese Chemical Letters 2012年第5期23卷 561-564页

作者： Mao Rong Wang Lin jiang Shao Fang Zhou Ze yuan Zhang Zeng Chen ji College of Chemistry and Material Science Shandong Agricultural UniversityTai'an 271018China

Eight novel 5,7-disubstituted-2-{5-methyl-3-（4-trifluoromethylphenyl）isoxazol-4-ylcarbonylimino}-2h-1,2,4-thiadiazolo[2,3- a]pyrimidines were synthesized by multi-step reactions in yields 68-85%.Reactions were carried out either by ultrasound irradiation or conventional method,and found it was faster and more efficient under ultrasonic *** herbicidal activities against Echinochloa crus-galli,Digitaria sanguinalis and Chenopodium serotinum were also evaluated by flat-utensil method,and the results indicated that the target compounds exhibited significant activities,some were even higher than the control herbicide.

关键词： 2h-1 2 4-Thiadiazolo[2 3-a]pyrimidine Synthesis Ultrasound Bioactivity

PVP治疗骨质疏松性椎体压缩骨折术后24 h疗效分析

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科学技术与工程 2024年第3期24卷 952-956页

作者：袁宇飞张存樊凯彬颜珍珍何娟李健斐苗洁邯郸市中心医院骨五科邯郸056001 邯郸市中心医院骨七科邯郸056001 邯郸市中心医院医学影像科邯郸056001

为了探讨影响经皮椎体成形术(percutaneous vertebroplasty,PVP)治疗骨质疏松性椎体压缩骨折(osteoporotic vertebral compression fractures,OVCF)术后24 h手术效果的影响因素,通过回顾性分析2015年1月—2022年1月邯郸市中心医院骨五科行PVP治疗的351名OVCF患者,根据Macnab量表将术后24 h手术效果分类,将患者分为满意组(A)和不满意组(B),分析患者骨折时间、术前VAS(visual analogue scale)评分、抑郁症病史等相关因素,将有统计学意义的变量进行二元Logistic回归分析。结果表明:两组比较,患者骨折时间、术前VAS评分、有无抑郁症病史均存在显著性差异(Ph患者不满意的独立危险因素。可见PVP术后手术效果与患者骨折时间、术前VAS评分、有无抑郁症病史有关;骨折时间≤3周、术前VAS评分≥7分、无抑郁症的患者手术效果好,患者满意度更高。

关键词：腰痛经皮椎体成形术骨质疏松性椎体压缩骨折椎体增强术抑郁症

Chemical looping conversion of methane via Fe_(2)O_(3)-LaFeO_(3)calcined from LaFe-MOF precursor

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Chinese journal of Chemical Engineering 2023年第10期62卷 225-237页

作者： jitong Deng Yongjun Zhang Xiaopeng Wang Wei Zhang hongjing han haiying Wang huimin yuan Yanan Zhang Yanguang Chen College of Chemistry&Chemical Engineering Northeast Petroleum UniversityDaqing 163318China PetroChina Daqing Petrochemical Research Center Daqing 163714China CNPC Safety and Environmental Technology Research Institute Co.LTD. Beijing 102206China

The effective utilization of natural gas resources is a promising option for the implementation of the"dual carbon"***,the capture of carbon dioxide with relatively lower concentration after the combustion of natural gas is the crucial ***,the lattice oxygen is used for chemical cycle conversion of methane to overcome the shortcomings mentioned above.A method was proposed to synthesize perovskite for methane cycle conversion using metal organic framework as a *** and pore structure of Fe_(2)O_(3)-LaFeO_(3)composite oxides were regulated by precursor synthesis conditions and calcination ***,the chemical looping conversion performance of methane was *** results showed that the pure phase precursor of La[Fe(CN)_(6)]·5h_(2)O was synthesized with the specific surface area of 23.91 m^(2)·g^(-1)under the crystallization of 10 h and the ph value ***_(2)O_(3)-LaFeO_(3)was obtained by controlled calcination of La[Fe(CN)_(6)]·5h_(2)O and Fe_(2)O_(3)with variable mass *** selectivity of CO_(2)can reach more than 99%under the optimal parameters of methane chemical looping conversion:m(Fe_(2)O_(3)):m(LaFeO_(3))=2:1,the reaction temperature is 900℃,the lattice oxygen conversion is less than 40%.Fe_(2)O_(3)-LaFeO_(3)still has good phase and structure stability after five redox reaction and regeneration cycles.

关键词： Composite Chemical looping conversion Carbon dioxide Metal organic frameworks Lattice oxygen Methane

Facile fabrication of ultrathin freestanding nanoporous Cu and Cu-Ag films with high SERS sensitivity by dealloying Mg-Cu(Ag)-Gd metallic glasses

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journal of Materials Science & Technology 2021年第11期70卷 205-213页

作者： yuan-Yun Zhao Feng Qian Chengliang Zhao Chunxiao Xie jianguo Wang Chuntao Chang Yanjun Li Lai-Chang Zhang Neutron Scattering Technical Engineering Research Center School of Mechanical EngineeringDongguan University of TechnologyDongguan523808China Department of Materials Science and Engineering Norwegian University of Science and TechnologyTrondheim7491Norway Edith Cowan University School of Engineering270 Joondalup DriveJoondalupPerthWA6027Australia School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China

Nanoporous metals prepared by dealloying have attracted increasing attention due to their interesting size-dependent physical,chemical,and biological ***,facile fabrication of metallic ultrathin freestanding nanoporous films(UF-NPFs)by dealloying is still ***,we report a novel strategy of facile preparation of flexible Cu,Cu_(3)Ag,and CuAg UF-NPFs by dealloying thick Mg-Cu(Ag)-Gd metallic glass *** dealloying,the local reaction latent heat-induced glass transition of the precursor ribbons leads to the formation of a solid/liquid interface between the initially dealloyed nanoporous layer and the underlying supercooled liquid *** to the bulging effect of in situ generated h2 on the solid/liquid interface,Cu,Cu_(3)Ag,and CuAg UF-NPFs with thicknesses of~200 nm can self-peel off from the outer surface of the dealloying ***,it was found that the surfaceenhanced Raman scattering(SERS)detection limit of Rhodamine 6G(R6G)on the Cu and CuAg UF-NPF substrates are 10^(-6)M and 10^(-11)M,respectively,which are lower than most of the Cu and Cu-Ag substrates prepared by other *** work presents a reliable simple strategy to synthesize a variety of cost effective and flexible metallic UF-NPFs for functional applications.

关键词： Metallic glasses Dealloying Nanoporous metals Ultrathin freestanding films Surface-enhanced Raman scattering(SERS)

Non-alcoholic fatty liver disease in irritable bowel syndrome:More than a coincidence?

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World journal of hepatology 2021年第12期13卷 1816-1827页

作者： huw Purssell Peter j Whorwell Varinder S Athwal Dipesh h Vasant hepatology Manchester University NHS Foundation TrustManchester M239LTUnited Kingdom Division of Diabetes Endocrinology and GastroenterologyUniversity of ManchesterManchester M239LTUnited Kingdom Neurogastroenterology Unit Wythenshawe HospitalManchester University NHS Foundation TrustManchester M239LTUnited Kingdom Neurogastroenterology Unit Department of GastroenterologyManchester University NHS Foundation TrustWythenshawe HospitalManchester M239LTUnited Kingdom

Irritable bowel syndrome(IBS)and non-alcoholic fatty liver disease(NAFLD)are amongst the most common gastrointestinal and liver conditions encountered in primary and secondary ***,there has been interest in the apparent coincidence of NAFLD in patients with IBS mainly driven by improved understanding of their shared risk factors and *** this paper we summarize the shared risk factors which include;overlapping nutritional and dietary factors as well as shared putative mechanisms of *** include changes in the gut microbiome,gut permeability,immunity,small bowel bacterial overgrowth and bile acid *** paper describes how these shared risk factors and etiological factors may have practical clinical implications for these highly prevalent *** also highlights some of the limitations of current epidemiological data relating to estimates of the overlapping prevalence of the two conditions which have resulted in inconsistent results and,therefore the need for further *** recognition and management of the overlap could potentially have impacts on treatment outcomes,compliance and morbidity of both *** with known IBS who have abnormal liver function tests or significant risk factors for NAFLD should be investigated appropriately for this ***,IBS should be considered in patients with NAFLD and symptoms of abdominal pain associated with defecation,an altered bowel habit and bloating.

关键词： Irritable bowel syndrome Non-alcoholic fatty liver disease Metabolic syndrome Obesity Prevalence Pathophysiology

Effects of the hierarchical pyrolysis polyaniline on reversible hydrogen storage of LiBh4

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Progress in Natural Science:Materials International 2018年第4期28卷 529-533页

作者： Zhenmin Ding Yufei Ma DANDan Peng Lu Zhang Yumeng Zhao yuan Li Shumin han State Key Laboratory of Metastable Materials Science and Technology Yanshan University hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical Engineering Yanshan University Lucky healthcare Company Limited

In this work,LiBh;–20 wt%PP composite was prepared by ball-milling with as-synthesized hierarchical pyrolysis polyaniline（PP）and LiBh;,and the hydrogen sorption performance as well as catalytic mechanism of the composite was *** is found that the onset desorption temperature of the composite decreases to 75°C,almost 235°C lower than that of the milled LiBh;.Moreover,the composite could release 4.1 wt%h;and rehydrogenate a total of 4.4 wt%h;when the temperature raiseds up to 400°C,showing an outstanding reversibility,which even 3.9 wt%h;can be kept after five *** scanning electron microscopy（SEM）observation and X-ray diffraction（XRD）analysis,we found that the PP surface forms some nanoholes after hydrogenation-dehydrogenation cycles,which leads to the confinement of some LiBh;in the PP nanoporous structure,therefore,the hydrogen sorption kinetics and reversibility are significantly *** addition,we also found the oxygenic groups of the PP can react with LiBh;forming LiBO;and Li;BO;,where the containing Li–B–O bonds loaded in the porous structure of the PP catalyze the hydrogenation reaction of LiBh;.

关键词： LiBh4 Pyrolysis polyaniline Complex hydride hydrogen storage materials Reversible de/hydrogenation

气体绝缘开关设备(GIS)的运行连续性和模块设计对其运行、维护和扩建的影响

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高压电器 2021年第1期57卷 136-142页

作者：沈威 BAUSCh j KOCh h 上海西门子高压开关有限公司上海200245 西门子股份公司德国埃尔兰根91050

可靠性是所有电力部门追求的共同目标,气体绝缘开关设备(GIS)的运行连续性是电力系统的重要课题。此外,可扩展性、运行和维护友好性对于电力部门来说也是非常重要的。文中首先介绍了在最新标准中对运行连续性的定义,接着对变电站接线方... 详细信息

可靠性是所有电力部门追求的共同目标,气体绝缘开关设备(GIS)的运行连续性是电力系统的重要课题。此外,可扩展性、运行和维护友好性对于电力部门来说也是非常重要的。文中首先介绍了在最新标准中对运行连续性的定义,接着对变电站接线方式、气体绝缘开关设备的设计、包括气室和隔板的布置方式对运行连续性的影响做了分析。最后用两个案例对运行连续性在实际设计中的应用做了解释,第一个案例是缓冲气室如何影响运行连续性;第二个案例是被动母线系统如何实现不停电扩建。

关键词：运行连续性气室分隔缓冲气室被动母线扩建

Binary molten salt in situ synthesis of sandwich-structure hybrids of hollowβ-Mo2C nanotubes and N-doped carbon nanosheets for hydrogen evolution reaction

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Carbon Energy 2023年第12期5卷 111-124页

作者： Tianyu Gong Yang Liu Kai Cui jiali Xu Linrui hou haowen Xu Ruochen Liu jianlin Deng Changzhou yuan School of Materials Science&Engineering University of JinanJinanPeople's Republic of China School of Chemical Engineering Shandong Institute of Petroleum and Chemical TechnologyDongyingPeople's Republic of China

Focused exploration of earth-abundant and cost-efficient non-noble metal electrocatalysts with superior hydrogen evolution reaction(hER)performance is very important for large-scale and efficient electrolysis of ***,a sandwich composite structure(designed as MS-Mo2C@NCNS)ofβ-Mo2C hollow nanotubes(hNT)and N-doped carbon nanosheets(NCNS)is designed and prepared using a binary NaCl–KCl molten salt(MS)strategy for *** temperature-dominant Kirkendall formation mechanism is tentatively proposed for such a three-dimensional hierarchical *** to its attractive structure and componential synergism,MS-Mo2C@NCNS exposes more effective active sites,confers robust structural stability,and shows significant electrocatalytic activity/stability in hER,with a current density of 10 mA cm-2 and an overpotential of only 98 mV in 1 M *** functional theory calculations point to the synergistic effect of Mo2C hNT and NCNS,leading to enhanced electronic transport and suitable adsorption free energies of h*(ΔGh*)on the surface of electroactive *** significantly,the MS-assisted synthetic methodology here provides an enormous perspective for the commercial development of highly active non-noble metal electrocatalysts toward efficient hydrogen evolution.

关键词： binary molten-salt synthesis hydrogen evolution reaction Mo2C hollow nanotubes N-doped carbon nanosheets sandwich structure