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Degradation Characters of La-Mg-Ni-Based Metal Hydride Alloys:Corrosion and Pulverization Behaviors

Acta Metallurgica Sinica(English Letters) 2018年第7期31卷 723-734页

作者： yi-ming li Yang-Huan Zhang Hui-Ping Ren Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and Technology

Degradation behaviors of three typical La-Mg-Ni alloys, La2MgNi9, La1.5Mg0.5Ni7 and La4MgNi19, were studied. La1.5- Mg0.5Ni7 with （La,Mg）2Ni7 as main phase presents better discharge capacity and cycling stability. The three alloys suffer severe pulverization and corrosion after electrochemical cycles, which are considered to be the significant factor attributing to the capacity deterioration. However, the overall corrosion extent of the three cycled alloys aggravates successively, which is inconsistent with the result that LaEMgNi9 presented poor cycling stability and also the assumption that alloy with high Mg content is easy to be corroded. The intrinsic anti-corrosion and anti-pulverization characteristics of the three alloys are mainly focused in this work. Immersion corrosion experiments demonstrate that the Mg-rich phases are more easily to be corroded. The corrosion resistance of the three alloys presents an improved trend which is inversely proportional to abundance of the Mg-rich phases. However, the anti-pulverization abilities present an inverse trend, which is closely related to the mechanical property of various phase structures. LaNi5 with the highest hardness is easy to crack, but the soft （La,Mg）Ni2 is more resistant to crack formation and spreading. Thus, the weaker corrosion of La2MgNi9 after electro- chemical cycling is attributed to the better intrinsic anti-pulverization capability though the anti-corrosion is poor. As La4MgNi19 possesses excellent corrosion resistance, enhancement of the anti-pulverization ability is urgent for improvement in the cycling stability.

关键词： La-Mg-Ni-based alloys Degradation behaviors Corrosion Pulverization

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liver injury in COVID-19: Clinical features, potential mechanisms, risk factors and clinical treatments

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World Journal of Gastroenterology 2023年第2期29卷 241-256页

作者： Shu-Wu Zhao yi-ming li yi-lin li Chen Su Department of Anesthesiology Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of MedicineChangsha 410013Hunan ProvinceChina School of Basic Medical Science Naval Medical University/Second Military UniversityShanghai 200433China Department of Pathology Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of MedicineChangsha 410013Hunan ProvinceChina Department of Anesthesiology and Pain Hunan Cancer Hospital/The Affiliated Cancer Hospital of Xiangya School of MedicineChangsha 410013Hunan ProvinceChina

The coronavirus disease 2019(COVID-19)pandemic has been a serious threat to global health for nearly 3 *** addition to pulmonary complications,liver injury is not uncommon in patients with novel *** the prevalence of liver injury varies widely among COVID-19 patients,its incidence is significantly increased in severe ***,there is an urgent need to understand liver injury caused by *** features of liver injury include detectable liver function abnormalities and liver imaging *** function tests,computed tomography scans,and ultrasound can help evaluate liver *** factors for liver injury in patients with COVID-19 include male sex,preexisting liver disease including liver transplantation and chronic liver disease,diabetes,obesity,and *** date,the mechanism of COVID-19-related liver injury is not fully *** pathophysiological basis can generally be explained by systemic inflammatory response,hypoxic damage,ischemia-reperfusion injury,and drug side *** this review,we systematically summarize the existing literature on liver injury caused by COVID-19,including clinical features,underlying mechanisms,and potential risk ***,we discuss clinical management and provide recommendations for the care of patients with liver injury.

关键词： liver injury COVID-19 Clinical feature Risk factor Treatment and management strategy

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Evolution of microstructure in reheated coarse-grained zone of G115 novel martensitic heat-resistant steel

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Journal of Iron and Steel Research International 2022年第2期29卷 327-338页

作者： Zhong-yi Chen Zheng-zong Chen Dong-xu Kou Yong-qing li Yong-lin Ma yi-ming li School of Material and Metallurgy Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina Institute for Special Steels China Iron and Steel Research InstituteBeijing100081China Technology Center Inner Mongolia North Heavy Industry Group Co.Ltd.Baotou014010Inner MongoliaChina Key Laboratory of Advanced Metals and Materials of Inner Mongolia of Materials and Metallurgy School Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina

Based on the thermal simulation method,a systematical analysis was conducted on the effect of welding peak temperature and the cooling time that takes place from 800 to 500℃ on microstructure,precipitates,substructure and microhardness of the reheated coarse-grained heat-affected zone(CGHAZ)of G115 novel martensitic heat-resistant *** revealed from the results,the microstructure of un-altered CGHAZ(UACGHAZ)and supercritically CGHAZ(SCCGHAZ)was lath martensite,and structural heredity *** reheated CGHAZ(IRCGHAZ)exhibited martensite and over-tempered martensite,and subcritical CGHAZ(SCGHAZ)displayed martensite and under-tempered *** austenite in UACGHAZ and SCCGHAZ was transformed with the diffusion mechanism during the first thermal cycle,but with the non-diffusion mechanism during the second thermal *** this reason,A_(c1) and A_(c3) during the second thermal cycle were significantly lower than those during the first thermal cycle,and A_(c1) and A_(c3) were reduced by nearly 14 and 44℃,*** the content and stability of the austenite alloy during the second thermal cycle of IRCGHAZ were lower than those during the first thermal cycle,M_(s) increased by nearly 30℃.There were considerable precipitates in the over-tempered region of IRCGHAZ,and the Laves phase was contained,which was not conducive to high-temperature creep ***,the dislocation density and the number of sub-grains in the region were lower,resulting in a sharp decrease in the microhardness,and it was the weak area in the reheated CGHAZ.

关键词： Heat-resistant steel G115 steel Reheated coarse-grained heat-affected zone Microstructure evolution Precipitate

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Efficient Chemical Synthesis and Folding of Mirror-Image Tropomyosin Receptor Kinase A Using the Strategy of Removable Glycosylation Modification

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Chinese Journal of Chemistry 2024年第19期42卷 2316-2322页

作者： Tongyue Wang Weiwei Shi Guo-Chao Chu yi-ming li Ministry of Education Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology Department of ChemistryTsinghua UniversityBeijing 100084China School of Food and Biological Engineering Engineering Research Center of Bio-processMinistry of EducationKey Laboratory of Animal Source of Anhui ProvinceHefei University of TechnologyHefeiAnhui 230009China

Comprehensive Summary The strategy of removable glycosylation modification was used to overcome the low-efficiency problem encountered in the chemical synthesis of the mirror-image D-version of the immunoglobulin(Ig)-like domain of tropomyosin receptor kinase A(DlgCTrkA),a protein molecule needed for mirror-image screening of D-peptide ligands targeting this cell membrane *** was found that O-linked-β-N-acetyl-D-glucosamine(O-GlcNAc)modification at^(D)Ser^(312),or^(D)Ser^(320)can significantly improve the efficiency of DlgCTrkA synthesis and folding,while O-GlcNAc modification at^(D)Ser^(330)showed barely any *** study provides a new example demonstrating the power of the removable glycosylation modification strategy in the chemical synthesis and folding of difficult-to-obtain *** also presents evidence that removable glycosylation modification at different sites would significantly affect the efficiency of protein folding promoted by this strategy.

关键词： Chemical protein synthesis Removable glycosylation modification Synthetic methods Protein folding D-protein

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Point source detection performance of Hard X-ray Modulation Telescope imaging observation

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Research in Astronomy and Astrophysics 2015年第11期15卷 1905-1916页

作者： Zhuo-Xi Huo yi-ming li Xiao-Bo li Jian-Feng Zhou Department of Physics Tsinghua University Centre for Astrophysics Tsinghua University Laboratoire de l'Accélérateur linéaire Institute of High Energy Physics Chinese Academy of Sciences Department of Engineering Physics Tsinghua University

The Hard X-ray Modulation Telescope（HXMT） will perform an all-sky survey in the hard X-ray band as well as deep imaging of a series of small sky *** expect various compact objects to be detected in these imaging observations. Point source detection performance of HXMT imaging observation depends not only on the instrument but also on the data analysis method that is applied since images are reconstructed from HXMT observed data with numerical methods. The denoising technique used plays an important part in the HXMT imaging data analysis pipeline along with demodulation and source detection. In this paper we have implemented several methods for denoising HXMT data and evaluated the point source detection performances in terms of sensitivities and location accuracies. The results show that direct demodulation with 1-fold cross-correlation should be the default reconstruction and regularization method, although both sensitivity and location accuracy could be further improved by selecting and tuning numerical methods in data analysis used for HXMT imaging observations.

关键词： regularization reconstructed selecting demodulation pixel wavelet pipeline neighborhood tuning histogram

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Effect of Ce on solute redistribution in liquid ahead of solid–liquid interface during solidification of Fe–4 wt.%Si alloy

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Journal of Iron and Steel Research International 2021年第10期28卷 1251-1258页

作者： Yun-ping Ji ming-xing Zhang Yuan Hou Tong-xin Zhao yi-ming li Hui-ping Ren School of Material and Metallurgy Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina Inner Mongolia Autonomous Region Key Laboratory of Advanced Metal Materials Baotou014010Inner MongoliaChina School of Mechanical and Mining Engineering The University of QueenslandBrisbaneQLD4072Australia Testing Center Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina Analytical Applications Center SHIMADZU(China)Co. Ltd.Shanghai200233China

The high efficiency of Ce addition in grain refinement ofδ-ferrite in a cast Fe–4 wt.%Si alloy was *** order to further understand the solute effect of Ce on the grain refinement of δ-ferrite,the conventional directional solidification technique,which enabled to freeze the solid–liquid interface to room temperature,was used to investigate the interfacial morphology and solute redistribution in the liquid at the front of the interface,together with thermodynamic calculation of the equilibrium partition coefficients of Ce and Si in Fe–4 wt.%Si–Ce system using the Equilib module and the FsStel database in FactSage software *** examination using a laser scanning confocal microscope showed a transition of the solid–liquid interface from planar to cellular in the Fe–4 wt.%Si alloy after adding 0.0260 wt.%Ce during the directional solidification ***,electron probe microanalysis revealed an enhanced segregation of Si solute in the liquid at the front of the solid–liquid interface due to the Ce *** solute segregation is considered as the cause of planar to cellular interface transition,which resulted from the creation of constitutional supercooling *** calculation indicated that Ce also segregated at the solid–liquid interface and the Ce addition had negligible effect on the equilibrium partition coefficient of *** is reasonable to consider that the contribution of Ce to the grain refinement ofδ-ferrite in the cast Fe–4 wt.%Si alloy as a solute was marginal.

关键词： Ce Fe-4 wt.%Si alloy Solute redistribution Directional solidification Electron probe microanalysis Thermodynamic calculation

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Phycocyanobilin accelerates liver regeneration and reduces mortality rate in carbon tetrachloride-induced liver injury mice

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World Journal of Gastroenterology 2015年第18期21卷 5465-5472页

作者： Jie liu Qing-Yu Zhang li-ming Yu Bin liu ming-yi li Run-Zhi Zhu Department of Hepatobiliary Surgery Affiliated Hospital of Guangdong Medical College Department of Maxillofacial Surgery Affiliated Hospital of Guangdong Medical College

AIM: To investigate the hepatoprotective effects of phycocyanobilin(PCB) in reducing hepatic injury and accelerating hepatocyte proliferation following carbon tetrachloride(CCl4) ***: C57BL/6 mice were orally administered PCB 100 mg/kg for 4 d after CCl4 injection, and then the serum and liver tissue of the mice were collected at days 1, 2, 3, 5 and 7 after CCl4 treatment. A series of evaluations were performed to identify the curative effects on liver injury and recovery. Aspartate aminotransferase(AST), alanine aminotransferase(ALT), albumin and superoxide dismutase(SOD) were detected to indirectly assess the anti-inflammatory effects of PCB. Meanwhile, we detected the expressions of hepatocyte growth factor, transforming growth factor alpha(TGF-α), TGF-β, tumor necrosis factor-alpha(TNF-α) and interleukin-6(IL-6), the factors which are associated with inflammation and liver regeneration. The protein expressions of proliferating cell nuclear antigen(PCNA), TNF-α and cytochrome C were detected by western blot. Furthermore, the survivalrates were analyzed of mice which were administered a lethal dose of CCl4(2.6 mg/kg)with or without ***:In our research,PCB showed a strongly anti-inflammatory effect on CCl4-induced liver injury in *** ALT was significantly decreased after CCl4 treatment from day 1(Pliver SOD were increased from day2(P0.05).PCB protected the structure of liver from the injury by *** assay showed that PCB dramatically reduced the number of apoptotic cells after CCl4 treatment compared to the control(101.0±25.4 vs 25.7±6.4,Pliver failure(ALF)mice which were injecte

关键词： liver injury Hepatoprotective Tumor necrosis factor-alpha Phycocyanobilin Cytochrome C

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Changes of crystal structure and hydrogen storage performances for multiphase La0.7Mg0.3Ni3 alloy upon gas–solid cycling

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Rare Metals 2017年第2期36卷 101-107页

作者： yi-ming li Han-Wei Zhang Yang-Huan Zhang Zhuo-Cheng liu Hui-Ping Ren School of Materials Science and Engineering Shanghai UniversityShanghai 200072China Analytical and Testing Center Inner Mongolia University of Science and TechnologyBaotou 014010China Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010China

In order to examine the effects of structure stability on the degradation behaviors of multiphase La0.7Mg0.3Ni3 alloy,changes of the crystal structure and hydrogen storage properties after gas-solid cycling were investigated in *** structural analysis identifies that（La,Mg）Ni3（PuNi3-type） phase transforms to amorphous,i.e.,hydrogen-induced amorphization（HIA） occurs whereas LaNi5（CaCu5-type）,（La,Mg）2Ni7（Ce2Ni7-type）,and（La,Mg）5Ni19（Pr5Co19-type） phases still keep crystalline upon hydriding/dehydriding *** amorphization remarkably affects both the gas-solid and electrochemical storage *** plateau of PCT curves becomes narrow and steep with ***,the maximum electrochemical capacity decreases notably after gas-solid hydrogenation *** electrochemical capacity reduction could be ascribed to both drop of the maximum storage capacity and the slope of plateau induced by partial *** direct electrochemical cycling,it is suggested that the capacity decay is mainly attributed to HIA in the initial stage.

关键词： RE-Mg-Ni hydrogen storage alloys Gas-solid cycling Partial amorphization Capacity degradation

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Degradation behaviors of La–Mg–Ni-based metal hydride alloys:structural stability and influence on hydrogen storage performances

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Acta Metallurgica Sinica(English Letters) 2018年第9期31卷 897-909页

作者： yi-ming li Bao-Yu Duan Zhuo-Cheng liu Yang-Huan Zhang Hui-Ping Ren Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and Technology Analytical and Testing Center Inner Mongolia University of Science and Technology

The present work focuses on the structural stability upon hydrogenation of three typical La-Mg-Ni-based alloys： La2 MgNi9, LaaMgNi14 and La4MgNi19. Structural changes during gaseous and electrochemical cycles were characterized, and the influence of the structure distortion on the hydrogen storage properties was concerned. Hydrogen-induced amor- phization （HIA） and disproportionation of the three alloys have occurred during both the gaseous and electrochemical cycles. Structural stability of the phase structures in the La-Mg-Ni system is found to follow the order： LaNi5- 〉（La,Mg）5Ni19 〉（La,Mg）2Ni7 〉（La,Mg）Ni3 〉（La,Mg）Ni2. HIA increases thermal stability of the metal hydrides and difficulty to dehydrogenation and leads to degradation of both the gaseous and electrochemical capacities. Interestingly, LaEMgNi9 with poor stability presents elevated discharge capability even at 60 ℃ which can be attributed to increase in the hydrogen desorption capability and inhibition of the self-discharge induced by severe HIA at higher temperatures. In addition, HIA in the electrochemical reactions is obviously weaker than the extent during the gaseous cycles, which is mainly due to the slower hydrogenation speed. The development of HIA in the gaseous and electrochemical process is considered to follow the direct and gradual modes, respectively.

关键词： La-Mg-Ni-based alloys Degradation behaviors Hydrogen-induced amorphization Electrochemicalproperties

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A highly selective and easy-to-synthesize Zn(Ⅱ) fluorescent probe based on 6-methoxyquinolin

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Chinese Chemical Letters 2011年第9期22卷 1013-1016页

作者： Hua Yang Zhao yi ming li Tian Jun Gong Qing Xiang Guo Department of Chemistry University of Science and Technology of China Hefei 230026 China Department of Chemistry Tsinghua University Beijing 100084 China

A novel fluorescent Zn^2＋ probe based on 6-methoxyquinolin was synthesized in four steps from inexpensive starting materials. It exhibits very strong fluorescence responses and has a remarkably high selectivity to Zn^2＋ than other physiological relevant metal ions. This new compound could be used as low-priced yet high-quality Zn^2＋ probe.

关键词： Zn^2+ probe 6-Methoxyquinolin Fluorescence Selectivity

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