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Rare Metals 2021年第10期40卷 2657-2689页

作者： Chan li Dao-Hui Zhao hua-li long Ming li Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional MoleculesHubei Key Laboratory of Polymer MaterialsCollege of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China

The non-noble metal oxygen reduction reaction(ORR) catalysts prepared by carbonization of metal–organic framework(MOF) have attracted more and more attentions in the fields of fuel cells and metal-air batteries due to their unique intrinsic advantages such as high catalytic activity, low price, simple synthesis and good adaptability. Different from the study of traditional high active noble metal catalysts, this review systematically summarizes recent developments on non-noble metal(Fe,Co, Cu, Ni, Mn and Mo) ORR catalysts prepared by various MOFs carbonization in different metal centers. The effects of synthesis strategies and pyrolysis conditions on the catalyst properties are discussed. Meanwhile, the key parameters of catalytic performances(including active sites, dispersed state and specific surface area) are discussed and the prospect is presented. It is expected that this review will provide effective guidance for future studies on carbonized non-noble MOFs for ORR electrochemical catalyst.

关键词： Non-noble metal MOF Pyrolysis Catalyst ORR

Formation of Edge Crack in 1.4%Si Non-oriented Electrical Steel during Hot Rolling

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Journal of Iron and Steel Research International 2014年第2期21卷 269-274页

作者： Ai-hua CHEN Hai-rong GUO hua-long li Toshihiko EMI Institute of Research of Iron and Steel Shasteel

Microstructure evolution, dynamic recrystallization, high temperature oxidation and hot ductility of 1.4 % Si non-oriented electrical steel sheets were investigated to reduce edge cracking. The causes of cracking were found to be coarse as-cast microstructure, grain boundary oxidation in reheating furnace, lack of dynamic recrystallization during hot rolling and increase of temperature, resulting in reduced hot ductility in strip edge region. Countermeas- ures against the edge crack are proposed accordingly. Lowering reheating temperature and reducing holding time re- duced oxidation and decarburization. Hot charging temperature was increased to decrease reheating temperature. And using an edger can refine microstructure in strip edge region. Finally, edge heater can be added to increase edge re- gion formability by inducing dynamic reerystallization and ductility by increasing temperature.

关键词： edge crack non-oriented electrical steel hot rolling

Research status and prospect of direct strip casting manufactured lowcarbon microalloyed steel

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Journal of Iron and Steel Research International 2022年第1期29卷 17-33页

作者： Shuai Xu Shao-hua li Shui-ze Wang Jun-heng Gao Rui Cao Qing-xiao Feng hua-long li Xin-ping Mao Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Jiangsu(ShaGang)Iron and Steel Research Institute Zhangjiagang 215625JiangsuChina

Direct strip casting(DSC)is one of the cutting-edge technologies for the steel industry in the twenty-first *** the background of carbon peak and carbon neutrality,DSC technology has a bright future of applications as it requires less production time and space with reduced energy *** to its sub-rapid cooling rate during solidification and low reduction during hot rolling,DSC process exhibits a series of unique physical metallurgy *** process characteristics of DSC process and the microstructural evolution during the thermomechanical processing of low-carbon microalloyed steel are *** effects of hot rolling,cooling,coiling temperatures and microalloying elements on the microstructure and mechanical properties are then ***,the future development orientations of DSC technology are suggested to fully utilize its unique features for the enhancement of its competitiveness and for the promotion of carbon neutrality of the steel industry.

关键词： Direct strip casting Low-carbon microalloyed steel Hot rolling Coiling Acicular ferrite

A trade-off between antipredatory behavior and pairing competition produced by male-male tandem running in three Reticulitermes species

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Insect Science 2015年第4期22卷 560-568页

作者： Gang-hua li long liu Chao-liang Lei Qiu-Ying huang Hubei Insect Resource Utilization and Sustainable Pest Management Key Laboratory Huazhong Agricultural University Wuhan 430070 China

Due to the omnipresent risk of predation, termites have evolved many antipreda- tory behaviors. The two related species Reticulitermes speratus and R. chinensis have been demonstrated to use homosexual tandem running to decrease individual predation risk after shedding their wings. In this study, we tested risk of predation in the termite R. flaviceps, which is distantly related to the above two species. We determined that homosexual tandem running also led to low individual predation risk in dealates of R. flaviceps. Moreover, by combining a predation model with a competition model, we observed a typical trade-off phenomenon between antipredatory behavior and pairing competition produced by male- male tandem running in the above three Reticulitermes species. Our results indicated that male-male tandem running could effectively protect disadvantaged individuals from being caught, but disadvantaged individuals would be easily eliminated in pairing competition after male-male tandem running, suggesting that male-male tandem running can pro- mote population evolution in termites by repeatedly removing the relatively inferior male individuals.

关键词： antipredatory behavior pairing competition tandem running termites trade-off

Evolution of interfacial heat transfer,contact behavior and microstructure during sub-rapid solidification of molten steel with different hydrogen contents

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Journal of Iron and Steel Research International 2024年第1期31卷 215-223页

作者： Cheng Lu Wan-lin Wang Chen-yang Zhu Jie Zeng Xin-yuan liu hua-long li School of Metallurgy and Environment Central South UniversityChangsha410083HunanChina National Center for International Research of Clean Metallurgy Central South UniversityChangsha410083HunanChina Institute of Research of Iron and Steel ShasteelZhangjiagang215625JiangsuChina

Typical Q235 low-carbon steel samples with different hydrogen contents(0.0004,0.0008,and 0.0013 wt.%)were prepared by adjusting the environment humidity and *** effects of hydrogen on interfacial heat transfer,contact behavior,and microstructure evolution were investigated using a novel droplet solidification *** results revealed that when the hydrogen content increases from 0.0004 to 0.0013 wt.%,the maximum heat flux between the molten steel and cooling substrate decreases from 8.01 to 6.19 MW/m^(2),and the total heat removed in the initial 2 s reduces from 10.30 to 8.27 MJ/m^(2).Moreover,the final contact angle between the molten steel and substrate increases from 103.741°to 113.697°,and the number of pores on the droplet bottom surface increases significantly from 21 to 210 with the increase in *** surface roughness of the droplet bottom surface increases from 20.902 to 49.181 *** addition,the average grain size of the droplet increases from 14.778 to 33.548 pm with the increase in the hydrogen *** interfacial contact condition becomes worse due to the escape of hydrogen from the steel matrix during the cooling process,which leads to the reduction in the interfacial heat transfer and the increase in the grain size.

关键词： Strip casting Hydrogen content Interfacial heat transfer behavior Contact behavior Microstructure evolution

Corrosion resistance of BN-ZrO_(2)ceramics with different additives by molten steel

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Journal of Iron and Steel Research International 2022年第7期29卷 1101-1109页

作者： Fan Qian hua-long li Wen-gang Yang Hai-rong Guo Guo-qi liu Hong-xia li Bei-yue Ma State Key Laboratory of Advanced Refractories Sinosteel Luoyang Institute of Refractories Research Co.Ltd.Luoyang 471039HenanChina Institute of Research of Iron and Steel ShasteelZhangjiagang 215625JiangsuChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina

BN–ZrO_(2)ceramics with different additives such as SiC,Al_(2)O_(3) and MgAl_(2)O_(4) were fabricated by hot pressing sintering process to study sintering properties and corrosion resistance by the rotary immersion molten steel *** results showed that SiC,Al_(2)O_(3) and MgAl_(2)O_(4) can improve the sintering properties of BN–ZrO_(2)ceramics;especially,the introduction of SiC can significantly improve the hardness of the material;thus,the above compounds will help to improve the wear resistance of BN–ZrO_(2)*** exposed oxide layer is in contact with molten steel and forms liquid phase after BN oxidation and B_(2)O_(3) volatilization,additives can significantly affect the properties of liquid phase,and m-ZrO_(2)grains are sintered and grown by dissolution–precipitation mechanism by liquid ***,Al_(2)O_(3) and MgAl_(2)O_(4) are more conducive to the formation of working layer with solid skeleton,which determines the corrosion resistance of BN–ZrO_(2)ceramics.

关键词： Thin strip continuous casting Side-dam Hot-pressing sintering BN–ZrO_(2)ceramic

Understanding thermal compression and deformation behavior of 3.15 wt.%Si non-oriented electrical steels prepared by sub-rapid solidification

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Journal of Iron and Steel Research International 2024年第9期31卷 2207-2216页

作者： Hui-hui Wang Wan-lin Wang hua-long li Sheng-jie Wu Pei-sheng Lyu Bao-jun Zhao Chen-yang Zhu School of Metallurgy and Environment Central South UniversityChangsha410083HunanChina Institute of Research of Iron&Steel Sha-Steel Co.Ltd.Suzhou215625JiangsuChina Faculty of Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000JiangxiChina Sustainable Minerals Institute The University of QueenslandBrisbane4072QueenslandAustralia

Sub-rapid solidification has the potential to enhance the columnar structure and the magnetic property of electrical ***,research on the hot deformation behavior of sub-rapid solidified non-oriented electrical steel,particularly at varying strain rates,has yet to be fully *** effect of thermal compression on the microstructure and mechanical properties of 3.15 wt.%Si non-oriented electrical steel strips produced through a strip casting simulator was systematically *** findings reveal that increasing the deformation temperature enhances grain recrystallization,while the peak stress decreases with higher ***,a lower strain rate favors dynamic recrystallization and reduces thermal *** can be seen that sub-rapid solidification can effectively reduce the thermal activation energy of non-oriented electrical steel,and the thermal activation energy is calculated to be 204.411 kJ/*** addition,the kinetic models for the dynamic recrystallization volume fraction of the studied 3.15 wt.%Si non-oriented electrical steel were established.

关键词： Non-oriented electrical steel Hot thermal compression Recrystallization Sub-rapid solidification

Anti-proliferation activity of terpenoids isolated from Euphorbia kansui in human cancer cells and their structure-activity relationship

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Chinese Journal of Natural Medicines 2017年第10期15卷 766-774页

作者： HOU Jin-Jun SHEN Yao YANG Zhou FANG lin CAI Lu-Ying YAO Shuai long hua-li WU Wan-Ying GUO De-An Shanghai Research Center for Modernization of Traditional Chinese Medicine National Engineering Laboratory for TCM Standardization Technology Shanghai Institute of Materia Medica Chinese Academy of Sciences Haike Road 501 Shanghai 201203 China

Euphorbia kansui is a commonly used traditional Chinese medicine for the treatment of edema,pleural effusion,and asthma,*** to the previous researches,terpenoids in *** possess various biological activities,e.g.,anti-virus,anti-allergy,antitumor *** this work,twenty five terpenoids were isolated from ***,including thirteen ingenane-and eight jatrophane-type diterpenoids(with two new compounds,kansuinin P and Q)and four *** of them were analyzed by MTS assay for in vitro anticancer activity in five human cancer cell ***-activity relationship for 12 ingenane-type diterpenoids in colorectal cancer Colo205 cells were preliminary *** anti-proliferation activities were observed in human melanoma cells breast cancer MDA-MB-435 cells and Colo205 *** than half of the isolated ingenane-type diterpenoids showed inhibitory activities in MDA-MB-435 *** ingenane-and one jatrophane-type diterpenoids possessed much lower IC_(50) values in MDA-MB-435 cells than positive control *** structure-activity relationship analysis showed that substituent on position 20 was important for the activity of ingenane-type diterpenoids in Colo205 cells and substituent on position 3 contributed more significant biological activity of the compounds than that on position 5 in both MDA-MB-435 and Colo205 cells.

关键词： Terpenoids Anti-proliferation activity Human cancer cells Structure-activity relationship

Active constituents and mechanisms of Respiratory Detox Shot, a traditional Chinese medicine prescription, for COVID-19 control and prevention: Network-molecular docking-LC–MS^E analysis

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Journal of Integrative Medicine 2020年第3期18卷 229-241页

作者： Zi-jia Zhang Wen-yong Wu Jin-jun Hou lin-lin Zhang Fei-fei li Lei Gao Xing-dong Wu Jing-ying Shi Rong Zhang hua-li long Min Lei Wan-ying Wu De-an Guo Kai-xian Chen Lewis A.Hofmann Zhong-hua Ci Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China World Health Science Organization LeesburgVA 20176USA

Objective: Lung-toxin Dispelling Formula No. 1, referred to as Respiratory Detox Shot(RDS), was developed based on a classical prescription of traditional Chinese medicine(TCM) and the theoretical understanding of herbal properties within TCM. Therapeutic benefits of using RDS for both disease control and prevention, in the effort to contain the coronavirus disease 2019(COVID-19), have been shown. However,the biochemically active constituents of RDS and their mechanisms of action are still unclear. The goal of the present study is to clarify the material foundation and action mechanism of ***: To conduct an analysis of RDS, an integrative analytical platform was constructed, including target prediction, protein–protein interaction(PPI) network, and cluster analysis;further, the hub genes involved in the disease-related pathways were identified, and the their corresponding compounds were used for in vitro validation of molecular docking predictions. The presence of these validated compounds was also measured in samples of the RDS formula to quantify the abundance of the biochemically active constituents. In our network pharmacological study, a total of 26 bioinformatic programs and databases were used, and six networks, covering the entire Zang-fu viscera, were constructed to comprehensively analyze the intricate connections among the compounds-targets-disease pathways-meridians of ***: For all 1071 known chemical constituents of the nine ingredients in RDS, identified from established TCM databases, 157 passed drug-likeness screening and led to 339 predicted targets in the constituent–target network. Forty-two hub genes with core regulatory effects were extracted from the PPI network, and 134 compounds and 29 crucial disease pathways were implicated in the target–constitu ent–disease network. Twelve disease pathways attributed to the Lung–Large Intestine meridians, with six and five attributed to the Kidney–Urinary Bladder and Stomach–Spleen meridian

关键词： Lung-toxin Dispelling Formula No.1 COVID-19 3C-like protease Network pharmacology Molecular docking Meridian tropism

Presence of notched QRS on paced electrocardiographs as a predictor of poor response to cardiac resynchronization therapy

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Chinese Medical Journal 2014年第15期127卷 2727-2734页

作者： Wang Jiayu Zhang Ping li Xuebin Zhu Tiangang li hua Wang long li Ding Wu Cuncao Gao Ying Tian Yun Guo Jihong Department of Cardiac Electrophysiology People's Hospital PekingUniversity Beijing 100044 China

Background Cardiac resynchronization therapy （CRT） on patients with advanced and refractory heart failure has made remarkable ***,notched QRS （nQRS） is commonly seen on electrocardiographs （ECGs） with bundle branch block morphology and on paced ECGs after implantation of a CRT device,which may reflect the heterogeneity of ventricular myocardial depolarization and electrical *** aim of this study was to determine whether patients with more nQRS myocardial segments on paced ECGs had a worse response to CRT than patients with fewer nQRS myocardial *** We prospectively enrolled 56 patients of CRT with chronic heart failure from People＇s Hospital affiliated to Peking University from January 2007 to October *** on nQRS segments on ECGs before CRT,we allocated them to two groups：fewer nQRS （〈2） myocardial segments （lateral,inferior,anterior segments） group （F-nQRS,G1,n=23） and more nQRS （≥2） myocardial segments group （M-nQRS,G2,n=33）.Then according to nQRS segments on ECGs after CRT,we divided them into two groups similarly：fewer nQRS （〈2） myocardial segments group （G3,n=24） and more nQRS （≥2） myocardial segments group （G4,n=32）.This study was approved by the ethics committee of People＇s *** At 6 months in the baseline-ECG group,there was a greater absolute increase in left ventricular ejection fraction （LVEF） in G2 than in G1 （（11.5±8.9）% vs.（5.5±10.4）%,P=0.023）,with the incidence of nonresponse lower in G2than in G1 （9.1% vs.39.1%,P=0.018）.In the paced-ECG group,the absolute increase in LVEF was less in G4 than in G3 （（6.4±8.8）% vs.（12.5±10.4）%,P=0.024） and the incidence of nonresponse was higher in G4 than in G3 （31.3% vs.8.3%,P=0.039）.Multivariate analysis showed that fewer nQRS （〈2） myocardial segments on paced ECGs （odds ratio 13.920） was a predictor of positive response to *** nQRS ≥2 myocardial segments （lateral,inferior,anterior） on paced ECGs may predict a poor response to CRT.

关键词： cardiac resynchronization therapy electrocardiography notched QRS