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Giant magnetoresistance in antiferromagnetic Mn2Au-based tunnel junction

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Science China(Physics,Mechanics & Astronomy) 2020年第9期63卷 111-117页

作者： Xing-Tao jia Xiao-Lin Cai yu jia School of Physics and Electronic Information Engineering Henan Polytechnic UniversityJiaozuo 454000China International Laboratory for Quantum Functional Materials of Henan School of PhysicsZhengzhou UniversityZhengzhou 450001China Key Laboratory for Special Functional Materials of Ministry of Education School of Materials Science and EngineeringHenan UniversityKaifeng 475004China

Recent studies on the electrical switching of tetragonal antiferromagnet(AFM)via Neél spin-orbit torque have paved the way for the economic use of antiferromagnetic *** most difficult obstacle that presently limits the application of antiferromagnetic materials in spintronics,especially in memory storage applications,could be the small and fragile magnetoresistance(MR)in the AFM-based *** this study,we investigated the spin transports in Mn2Au-based tunnel junctions based on the first-principle scattering *** MRs more than 1000%are predicted in some Fe/MgO/Ag/Mn2Au/Ta junctions that are about the same order as that in an MgO-based ferromagnetic tunnel junction with same barrier *** interplay of the spin filtering effect,the quantum well resonant states,and the interfacial resonant states could be responsible for the unusual giant and robust MRs observed in these Mn2Au-based junctions.

关键词： Mn2Au giant magnetoresistance tunnel junction

One-step synthesis of Fe-Ni hydroxide nanosheets derived from bimetallic foam for efficient electrocatalytic oxygen evolution and overall water splitting

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Chinese Chemical Letters 2018年第12期29卷 1875-1878页

作者： Lili Zeng Linjing Yang jia lu Jin jia jiayuan yu yunqie Deng Mingfei Shao Weijia Zhou Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research InstituteSchool of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China Xinhua College of Sun Yat-sen University Guangzhou 510520China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

The research of superior water oxidation electrodes is essential for the green energy in the form of hydrogen by way of electrolytic water splitting, and still remains challenging. Based upon dealloying foam, Fe-Ni hydroxide nanosheets network structure is designed on the surface of Fe-Ni alloy foam. The ratio of Ni/Fe elements was adjusted to realize the optimal catalytic activities for oxygen evolution reaction（OER） and hydrogen evolution reaction（HER）. The obtained electrode of Fe-Ni hydroxide nanosheets/Fe-Ni alloy foam-60% Fe（FN LDH/FNF-60, 60 is the percentage of Fe content） possess low overpotential of 261 mV to reach 10 mA/cm;, small Tafel slope（85.5 mV/dec）, and superior long-term stability（remaining 10 mA/cm;for over 14 h without attenuation） toward OER in 1.0 mol/L ***, an alkaline water electrolyzer is constructed with the FN LDH/FNF-60 as anode and Ni（OH）;/Fe-Ni alloy foam-25% Fe(Ni（OH）;/FNF-25) as cathode, which displays superior electrolytic performance（affording 10 mA/cm;at 1.62 V） and lasting durability.

关键词： One-step synthesis Bimetallic foam Water splitting Fe-Ni hydroxide Nanosheet array

Frontier science and challenges on offshore carbon storage

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Frontiers of Environmental Science & Engineering 2023年第7期17卷 11-34页

作者： Haochu Ku Yihe Miao Yaozu Wang Xi Chen Xuancan Zhu Hailong lu jia Li Lijun yu College of Smart Energy Shanghai Jiao Tong UniversityShanghai 200240China China-UK Low Carbon College Shanghai Jiao Tong UniversityShanghai 201306China Research Center of Solar Power&Refrigeration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Beijing International Center for Gas Hydrate School of Earth and Space SciencesPeking UniversityBeijing 100871China The Hong Kong University of Science and Technology(Guangzhou) Nansha 511458China jiangmen Laboratory for Carbon and Climate Science and Technology Jiangmen 529100China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Carbon capture and storage(CCS)technology is an imperative,strategic,and constitutive method to considerably reduce anthropogenic CO_(2)emissions and alleviate climate change *** ocean is the largest active carbon bank and an essential energy source on the Earth's *** to oceanic nature-based carbon dioxide removal(CDR),carbon capture from point sources with ocean storage is more appropriate for solving short-term climate change *** review focuses on the recent state-of-the-art developments in offshore carbon *** first discusses the current status and development prospects of CCS,associated with the chailenges and uncertainties of oceanic nature-based *** second section outlines the mechanisms,sites,advantages,and ecologic hazards of direct offshore CO_(2)*** third section emphasizes the mechanisms,schemes,influencing factors,and recovery efficiency of ocean-based CO-CH_(4)replacement and CO_(2)-enhanced oil recovery are *** addition,this review discusses the economic aspects of offshore CCS and the preponderance of offshore CCs ***,the upsides,limitations,and prospects for further investigation of offshore CO_(2)storage are presented.

关键词： Offshore carbon storage Direct CO_(2),injection CO_(2),-CH_(4)replacement CO_(2)-EOR CCS hubs CO_(2),transport

Synthesis of tanshinoneⅡA analogues and their inhibitory activities against Cdc25 phosphatases

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Chinese Chemical Letters 2009年第12期20卷 1461-1464页

作者： Wei Gang Huang Jing Ya Li yu luo jia Li Wei lu Department of Chemistry East China Normal University Shanghai 200062 China The National Center for Drugs Screening Shanghai Institute ofMateria Medica SIBS Chinese Academy of Sciences Shanghai 201203 China

Two series of tanshinone ⅡA derivatives were synthesized and evaluated for their antitumor activities as Cdc25 phosphatase inhibitors. Most of them demonstrated potent Cdc25 inhibitory activity and powerful cytotoxicity against A549 tumor cell line, producing IC50 values in very low micromolar range. At last, the preliminary SAR was discussed.

关键词： Tanshinone ⅡA Cdc25 phosphatases Synthesis Antitumor

Numerical Modeling of the Compression Process of Elastic Open-cell Foams

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Chinese Journal of Aeronautics 2007年第3期20卷 215-222页

作者： ZHANG jia-lei lu Zi-xing Institute of Solid Mechanics Beijing University of Aeronautics and Astronautics Beijing 100083 China

The random models of open-cell foams that can reflect the actual cell geometrical properties are constructed with the Voronoi technique. The compression process of elastic open-cell foams is simulated with the nonlinear calculation module of finite element analysis program. In order to get the general results applicable to this kind of materials, the dimensionless compressive stress is used and the stress-strain curves of foam models with different geometrical properties are obtained. Then, the influences of open-cell geometrical properties, including the shape of strut cross section, relative density and cell shape irregularity, on the compressive nonlinear mechani- cal performance are analyzed. In addition, the numerical results are compared with the predicted results of cubic staggering model. Nu- merical results indicate that the simulated results reflect the compressive process of foams quite well and the geometrical properties of cell have significant influences on the nonlinear mechanical behavior of foams.

关键词： Voronoi technique open-cell foam nonlinear compressive stress

Progress in preparation of AlN-reinforced magnesium matrix composites:A review

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China Foundry 2024年第1期21卷 1-10页

作者： lu Chen Shu-lin Lü Di-jia Zhao Wei Guo jian-yu Li Shu-sen Wu State Key Lab of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

As a ceramic material,AlN has very good thermophysical and mechanical *** addition,AlN is an effective refining agent for Mg alloys because it has a lattice constant similar to that of ***,AlN is an ideal reinforcement for magnesium matrix composites(MMCs),and is attracting increasing *** review addresses the development of preparation technologies for AlN-reinforced Mg matrix *** mainstream preparation techniques include stir casting,melt infiltration,powder metallurgy,and in-situ *** addition,the advantages and disadvantages of these techniques are analyzed in depth,and it is pointed out that the next direction for the preparation of high-performance AlN-reinforced MMCs is less aluminization and multiple technologies integration.

关键词： AlN MMCs preparation thermophysical property mechanical property

Analysis of the characteristics and management of critical values in a newborn tertiary center in China

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World Journal of Pediatrics 2017年第1期13卷 49-56页

作者： Zheng-Li Wang Li-Zhong Du Yi-yu Chen lu-Quan Li Qi lu Ying Liu lu-Ying Cao yu He jia-Lin yu Department of Neonatology Children's Hospital of Chongqing Medical UniversityMinistry of Education Key Laboratory of Child Development and DisordersKey Laboratory of Pediatrics in Chongqing and Chongqing International Science and Technology Cooperation Center for Child Development and DisordersChongqingChina Department of Neonatology Children's HospitalZhejiang University School of Medicine

Background."Critical value reporting has been widely adopted by hospitals throughout the world,but there were few reports about neonatal critical *** study aimed to analyze characteristics of the neonatal critical values considered at our center and to provide information on improving neonatal intensive ***:A retrospective study of critical values at a newborn tertiary center in China was conducted to assess neonatal critical values according to test,distribution,reporting time,patient outcome and the impact to the therapy.

关键词： critical care critical value management strategies newborn

Mechanism of action of Linggui Zhugan Decoction in treating non-alcoholic fatty liver disease using untargeted metabolomics approach

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Traditional Medicine Research 2025年第2期10卷 65-76页

作者： Huan Pei Ren-Lin Li Xin-Ran Song Qian-Qian Wan yu-Ming Wang Han-Zhou Li Wei-Quan Xu jia-Bao Liao Wei-Bo Wen Jing Miao Huan-Tian Cui School of Basic Medicine Yunnan University of Chinese MedicineKunming 650599China School Clinical Medical College Yunnan University of Chinese MedicineKunming 650599China First School of Clinical Medicine Yunnan University of Chinese MedicineKunming 650599China School of Integrative Chinese and Western Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Department of Pharmacy Tianjin Second People's HospitalTianjin 300192China

Background:Non-alcoholic fatty liver disease(NAFLD)is a liver disorder characterized by the accumulation and degeneration of fat in the liver cells,a condition that may further deteriorate and lead to cirrhosis and liver *** studies showed that metabolic dysfunction can promote NAFLD *** Zhugan Decoction(LGZGD)has therapeutic effects on *** mechanism of LGZGD still remains *** study was to examine the impact of LGZGD on the metabolic processes involved in the development of ***:A mice model of NAFLD was treated with *** therapeutic potential of LGZGD was evaluated by assessing the activity of transaminases,lipids levels of blood,and pathological changes in the liver of the mice model of ***,this study also evaluated the influence of LGZGD on liver inflammation and oxidative ***:The results of untargeted metabolomics analysis showed that LGZGD reduced the disordered lipid metabolism in NAFLD *** improved the oxidative stress and also reduced the levels of pro-inflammatory cytokines in the *** metabolomics analysis of liver samples revealed that LGZGD treatment improved metabolic disorders,including alanine,aspartate,glutamate,glycerophospholipid metabolism,and citrate *** RT-qPCR and Western blot results showed that LGZGD could regulate the expression of key enzymes in the metabolic pathway of the citrate cycle,including ATP-citrate lyase(ACLY),alanine-glyoxylate aminotransferase-2(AGXT2),phosphatidylethanolamine N-methyltransferase(PEMT),and succinate dehydrogenase(SDH).Conclusion:We found that LGZGD can treat NAFLD by reducing inflammatory responses,inhibiting oxidative stress,regulating alanine,aspartate,glutamate,and glycerophospholipid metabolism,and citrate cycle pathways.

关键词： NAFLD LGZGD untargeted metabolomics glycerophospholipid metabolism citrate cycle

How Does Debt Structure Influence Stock Price Crash Risk?

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Journal of Systems Science & Complexity 2018年第2期31卷 473-492页

作者： jia Zichao DENG lu XU Ruiyang School of Economics and Management BeiHang University

This paper uses the financial data of Chinese listed firms to explore the relationship between the debt structure, which is measured as the ratio of trade credit to bank loan, and future stock price crash risk. The empirical results show that the ratio of trade credit to bank loan is positively associated with the firm-specific crash risk while a good institutional environment reduces this positive relationship. In addition, considering the firm＇s ownership type, the authors find that the positive relationship between the debt structure and crash risk is more significant in the SOEs.

关键词： Bank loan crash risk debt structure trade credit.