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Exploring charge and spin fluctuations in infinite-layer cuprate SrCuO_(2)from a phonon perspective

Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 159-167页

作者： Xin Du Pei-Han sun Ben-Chao Gong Jian-Feng Zhang Zhong-yi Lu Kai Liu Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing 100872China Department of Physics School of ScienceJiangsu University of Science and TechnologyZhenjiang 212100China Institute of Physics Chinese Academy of SciencesBeijing 100190China Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education) Renmin University of ChinaBeijing 100872China

The infinite-layer cuprate ACu O_(2)(A=Ca,Sr,Ba)possesses the simplest crystal structure among numerous cuprate superconductors and can serve as a prototypical system to explore the unconventional *** on the first-principles electronic structure calculations,we have studied the electronic and magnetic properties of the infinite-layer cuprate SrCuO_(2)from a phonon *** find that interesting fluctuations of charges,electrical dipoles,and local magnetic moments can be induced by the atomic displacements of phonon modes in SrCuO_(2)upon the hole *** all optical phonon modes of SrCuO_(2)in the antiferromagnetic Néel state,only the A_(1g)mode that involves the full-breathing O vibrations along the Cu-O bonds can cause significant fluctuations of local magnetic moments on O atoms and dramatic charge redistributions between Cu and O ***,due to the atomic displacements of the A_(1g)mode,both the charge fluctuations on Cu and the electrical dipoles on O show a dome-like evolution with increasing hole doping,quite similar to the experimentally observed behavior of the superconducting T_(c);in comparison,the fluctuations of local magnetic moments on O display a monotonic enhancement along with the hole *** analyses indicate that around the optimal doping,there exists a large softening in the frequency of the A_(1g)phonon mode and a van Hove singularity in the electronic structure close to the Fermi level,suggesting potential electron-phonon *** work reveals the important role of the full-breathing O phonon mode playing in the infinite-layer SrCuO_(2),which may provide new insights in understanding the cuprate superconductivity.

关键词： first-principles calculations cuprate superconductors phonon charge and spin fluctuations

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Unveiling the geometric site dependent activity of spinel Co_(3)O_(4)for electrocatalytic chlorine evolution reaction

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Journal of Energy Chemistry 2024年第5期92卷 95-103页

作者： Linke Cai Yao Liu Jingfang Zhang Qiqi Jia Jiacheng Guan Hongwei sun Yu Yu yi Huang Key Laboratory of Pesticide&Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of EducationCollege of ChemistryCentral China Normal UniversityWuhan 430079HubeiChina Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationHubei Key Laboratory of Novel Reactor and Green Chemical TechnologySchool of Chemical Engineering&PharmacyWuhan Institute of TechnologyWuhan 430205HubeiChina College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108FujianChina School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601AnhuiChina

Spinel cobalt oxide(Co_(3)O_(4)),consisting of tetrahedral Co^(2+)(CoTd)and octahedral Co^(3+)(CoOh),is considered as promising earth-abundant electrocatalyst for chlorine evolution reaction(CER).Identifying the catalytic contribution of geometric Co site in the electrocatalytic CER plays a pivotal role to precisely modulate electronic configuration of active Co sites to boost ***,combining density functional theory calculations and experiment results assisted with operando analysis,we found that the Co_(Oh) site acts as the main active site for CER in spinel Co_(3)O_(4),which shows better Cl^(-)adsorption and more moderate intermediate adsorption toward CER than CoTd site,and does not undergo redox transition under CER condition at applied *** by above findings,the oxygen vacancies were further introduced into the Co_(3)O_(4) to precisely manipulate the electronic configuration of Co_(Oh) to boost Cl^(-)adsorption and optimize the reaction path of CER and thus to enhance the intrinsic CER activity *** work figures out the importance of geometric configuration dependent CER activity,shedding light on the rational design of advanced electrocatalysts from geometric configuration optimization at the atomic level.

关键词： Chlorine evolution reaction Geometry effects Active chlorine Electronic configuration optimization Spinel oxides

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Sea cucumber gut tetrapeptide ameliorates alcoholic gastric damage via restoring mitochondrial dynamics

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Food Science and Human Wellness 2024年

作者： Zhihong Zheng na sun Jingqi Yang Zhijie Bao Songyi Lin State Key Laboratory of Marine Food Processing and Safety Control School of Food Science and Technology Dalian Polytechnic University national Engineering Research Center of Seafood School of Food Science and Technology Dalian Polytechnic University Collaborative Innovation Center of Seafood Deep Processing Dalian Polytechnic University Liaoning Engineering Research Center of Special Dietary Food Dalian Polytechnic University

This paper aimed to explore the mechanism of tetrapeptide VTPY in improving alcoholic gastric injury. VTPY has the potential to enhance the growth and movement of normal GES-1 cells. Following ethanol-induced impairment， VTPY effectively improved migration of GES-1 and HUVEC cells， enhanced angiogenesis， eliminated cellular and mitochondrial ROS， inhibited excessive mitochondrial division， enhanced F-actin polymerization and mitochondrial respiratory capacity. To counteract excessive mitochondrial fission， VTPY primarily restores the mitochondria dynamics by reducing the expression of Drp1 and Fis1， while increasing Mfn2. Further studies utilizing inhibitors clarifies that the inhibition of excessive mitochondrial fission can markedly reduce F-actin depolymerization， consequently enhancing cell migration. Additionally， VTPY can inhibit the apoptosis pathway by maintaining potential of mitochondrial membrane， preventing the release of mitochondrial cytochrome c， bolstering the levels of Bcl-XL， while reducing the levels of Bax and cleaved-caspase3. Further investigations using inhibitors demonstrates that excessive mitochondrial fission could activate apoptotic pathway. However， VTPY counteracts this effect and enhance cells viability. Further evidence suggests that VTPY effectively improves ulcer index and pathologic changes， relieves inflammation， enhances the balance of oxidation and anti-oxidation， promotes angiogenesis， improves the expression of mitochondrial dynamics factors， blocks apoptotic pathway， and subsequently ameliorates gastric damage in mice through Fis-1/Bcl-2 pathway.

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Multifaceted role of microRnas in gastric cancer stem cells: Mechanisms and potential biomarkers

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World Journal of Gastrointestinal Oncology 2024年第2期16卷 300-313页

作者： Qian-Hui sun Zi-Yu Kuang Guang-Hui Zhu Bao-yi Ni Jie Li Department of Oncology Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Graduate College Beijing University of Traditional Chinese MedicineBeijing 100029China Department of Oncology Heilongjiang University of Chinese MedicineHarbin 150040Heilongjiang ProvinceChina

MicroRnas(miRnas)have received much attention in the past decade as potential key epigenomic regulators of tumors and cancer stem cells(CSCs).The abnormal expression of miRnas is responsible for different phenotypes of gastric cancer stem cells(GCSCs).Some specific miRnas could be used as promising biomarkers and therapeutic targets for the identification of *** review summarizes the coding process and biological functions of miRnas and demon-strates their role and efficacy in gastric cancer(GC)metastasis,drug resistance,and apoptosis,especially in the regulatory mechanism of *** shows that the overexpression of onco-miRnas and silencing of tumor-suppressor miRnas can play a role in promoting or inhibiting tumor metastasis,apart from the initial formation of *** also discusses the epigenetic regulation and potential clinical applications of miRnas as well as the role of CSCs in the pathogenesis of *** believe that this review may help in designing novel therapeutic approaches for GC.

关键词： Gastric cancer,Cancer stem cells MicroRnas Epigenetics Therapeutic target

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Artificial stepwise light harvesting system in water constructed by quadruple hydrogen bonding supramolecular polymeric nanoparticles

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Chinese Chemical Letters 2024年第2期35卷 370-373页

作者： Tangxin Xiao Xiuxiu Li Liangliang Zhang Kai Diao Zheng-yi Li Xiao-Qiang sun Leyong Wang Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Stepwise energy transfer is ubiquitous in natural photosynthesis,which greatly promotes the widespread use of solar ***,we constructed a supramolecular light harvesting system based on sequential energy transfer through the hierarchical self-assembly of M,which contains a cyanostilbene core flanked by two ureidopyrimidinone motifs,endowing itself with both aggregation-induced emission behavior and quadruple hydrogen bonding *** monomer M can self-assemble into hydrogen bonded polymers and then form supramolecular polymeric nanoparticles in water through a mini-emulsion *** nanoparticles were further utilized to encapsulate the relay acceptor ESY and the final acceptor NDI to form a two-step FRET *** fluorescence including a white-light emission was successfully *** work not only shows a desirable way for the fabrication of efficient two-step light harvesting systems,but also shows great potential in tunable photoluminescent nanomaterials.

关键词： Light harvesting system Supramolecular polymer Quadruple hydrogen bonding AIE Self-assembly

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Insights into Euphorbia diversity: Probing the contrasts between Euphorbia fischeriana Steud and Euphorbia ebracteolata Hayata

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Journal of Pharmaceutical Analysis 2024年第5期14卷 775-779页

作者： Kaicheng Du yi Zhang Lei sun Muke Tao Tiantian Zuo Yumeng Wang Zhengfeng Zhang Dali Meng School of Traditional Chinese Materia Medica Shenyang Pharmaceutical UniversityShenyang110016China NMPA Key Laboratory for Quality Monitoring of narcotic Drugs and Psychotropic Substances Chongqing Institute for Food and Drug ControlChongqing401121China national Institutes for Food and Drug Control Beijing100050China

In traditional Chinese medicine(TCM),Euphorbia fischeriana Steud(***)and Euphorbia ebracteolata Hayata(***),commonly referred to as“Langdu”,are widely extensively utilized for treating lymphatic tuberculosis and ringworm[1].Both plant species are perennial herbaceous plants mainly distributed in northeastern China,Mongolia,Russia(Siberia),and Republic of Korea[2].There have been many reports on the chemical constituents and pharmacological effects of the two plant species,which has made more and more researchers realize that there may be differences between *** and *** some cases,long-term improper use of herbal medicines can even lead to life-threatening conditions[3,4].Therefore,it is essential to employ an effective technology to differentiate between these two plants based on their chemical constituents and biological activities,so as to reduce the harm caused by the mixing and misuse of medicinal ***,the present paper describes a study of the differences between *** and ***,using untargeted plant metabolomics and biological activity *** study aims to provide valuable insight into their equivalence and potential interchangeability in TCM and clinical medication.

关键词： Euphorbia Siberia northeastern

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Plant Chemical Defenses against Insect Herbivores—Using theWild Tobacco as a Model

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Phyton-International Journal of Experimental Botany 2024年第4期93卷 641-659页

作者： Guangwei sun Xuanhao Zhang yi Liu Liguang Chai Daisong Liu Zhenguo Chen Shiyou Lü Hubei Provincial Tobacco Research Institute Wuhan430030China Shiyan Branch of Hubei Tobacco Company Shiyan442000China State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life SciencesHubei UniversityWuhan430062China

The Nicotiana genus, commonly known as tobacco, holds significant importance as a crucial economic crop. Confrontedwith an abundance of herbivorous insects that pose a substantial threat to yield, tobacco has developed adiverse and sophisticated array of mechanisms, establishing itself as a model of plant ecological defense. Thisreview provides a concise overview of the current understanding of tobacco’s defense strategies against *** defenses, exemplified by its well-known tactic of secreting the alkaloid nicotine, serve as a potent toxinagainst a broad spectrum of herbivorous pests. Moreover, in response to herbivore attacks, tobacco enhancesthe discharge of volatile compounds, harnessing an indirect strategy that attracts the predators of the *** delicate balance between defense and growth leads to the initiation of most defense strategies only after aherbivore attack. Among plant hormones, notably jasmonic acid (JA), play central roles in coordinating thesedefense processes. JA signaling interacts with other plant hormone signaling pathways to facilitate the extensivetranscriptional and metabolic adjustments in plants following herbivore assault. By shedding light on these ecologicaldefense strategies, this review emphasizes not only tobacco’s remarkable adaptability in its natural habitatbut also offers insights beneficial for enhancing the resilience of current crops.

关键词： Tobacco herbivore chemical defense jasmonic acid regulation

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Controlling hydrogenation of C=C and C=O bonds in cinnamaldehyde using Pt_(1)/Ni and Pt_(1)/Co single-atom alloy catalysts

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Rare Metals 2024年第6期43卷 2859-2868页

作者： Huan-Shi Lan yi-Da Yang Qing-Di sun Hao Zhang ying Zhang Qian He Ran Chen Guo-yi Bai Xiao-Hui He Hong-Bing Ji School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China Key Laboratory of Bioinorganicand Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research InstituteSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou510275China UBFC CNRSENSMMFEMTO-ST Institute25030 Besancon CEDEXFrance College of Chemistry and Materials Science Hebei UniversityBaoding 071002China State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

Selective hydrogenation of C=C and C=O bonds in cinnamaldehyde(CAL)to produce desired products is a challenging task due to the complex conjugate system of the two unsaturated functional *** this study,a simple ball milling method is presented for synthesizing Pt-based single-atom alloy catalysts(SAAs)that can function as a control switch for the selective hydrogenation of CAL into highly valuable products.

关键词： alloy hydrogenation conjugate

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Mechanism and control of nonuniform phase transformation of microalloyed dual-phase steel during cooling process after hot rolling

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Journal of Iron and Steel Research(International) 2024年第2期31卷 428-441页

作者： Wen-quan sun Sheng-yi Yong Tie-heng Yuan Chao Liu San-bao Zhou Rui-chun Guo Meng-xia Tang national Engineering Research Center for Advanced Rolling and Intelligent Manufacturing University of Science and Technology BeijingBeijing100083China Strip Production Plant Xichang Steel and Vanadium Corporation of Pangang GroupXichang615000SichuanChina

After cooling in the hot rolling process,the metallographic structure of microalloyed dual-phase steel is nonuniform along the rolling direction,while the thickness fluctuation of microalloyed dual-phase steel with a nonuniform metallographic structure will occur during cold *** mechanism of nonuniform phase transformation of microalloyed dual-phase steels was studied during the cooling process after hot rolling,and the nonuniform phase transformation of microalloyed dual-phase steel was regulated during the cooling process after hot rolling through process ***,the empirical equation of phase transformation temperature was measured by a dilatometer considering thermal ***,the phase field and temperature field of laminar cooling process were calculated to provide initial boundary conditions for the finite element *** that,the coupling finite element model of the temperature phase transformation of the strip steel in coiling transportation process was *** simulation results show that the different thermal contact conditions of the microalloyed dual-phase steel during coil transportation lead to uneven cooling of the coil,which leads to nonuniform transformation of the coil along the rolling *** addition,by prolonging the time interval from coiling to unloading,the phenomenon of nonuniform phase transformation of microalloyed dual-phase steel can be effectively *** simulation results are applied to industrial *** application results show that prolonging the time interval from coiling to unloading can effectively improve the nonuniform phase transformation of microalloyed dual-phase steel in the cooling process after hot rolling.

关键词： Microalloyed dual-phase steel Thickness fluctuation Cooling Heat conduction Nonuniform phase transition Finite element method

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Prediction of Health Level of Multiform Lithium Sulfur Batteries Based on Incremental Capacity Analysis and an Improved LSTM

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Protection and Control of Modern Power Systems 2024年第2期9卷 21-31页

作者： Hao Zhang Hanlei sun Le Kang yi Zhang Licheng Wang Kai Wang School of Materials Science and Engineering Xi’an University of Architecture and Technology in Xi’anShanxi ProvinceChina School of Electrical Engineering Qingdao UniversityQingdao 266000China College of Materials Science and Engineering Xi’an University of Science and TechnologyXi’anShaanxi ProvinceChina School of Energy Sciences and Engineering Nanjing Tech UniversityNanjingJiangsu ProvinceChina School of Information Engineering Zhejiang University of TechnologyHangzhou provinceChina

Capacity estimation plays a crucial role in battery management systems,and is essential for ensuring the safety and reliability of lithium-sulfur(Li-S)*** paper proposes a method that uses a long short-term memory(LSTM)neural network to estimate the state of health(SOH)of Li-S *** method uses health features extracted from the charging curve and incre-mental capacity analysis(ICA)as input for the LSTM *** enhance the robustness and accuracy of the network,the Adam algorithm is employed to optimize specific *** data from three different groups of batteries with varying nominal capac-ities are used to validate the proposed *** results demonstrate the effectiveness of the method in accurately estimating the capacity degradation of all three ***,the study examines the impact of different lengths of network training sets on capacity *** results reveal that the ICA-LSTM model achieves a prediction accuracy of mean absolute error 4.6%and mean squared error 0.21%with three different training set lengths of 20%,40%,and 60%.The analysis demonstrates that the lightweight model maintains high SOH estimation accu-racy even with a small training set,and exhibits strong adaptive and generalization capabilities when applied to different Li-S ***,the proposed method,supported by experimental validation and analysis,demonstrates its efficacy in ensuring accurate and reliable SOH estimation,thereby enhancing the safety and per-formance of Li-S *** Terms—Adam algorithm,incremental capacity analysis,Li-S battery,long short-term memory,state of health.

关键词： Adam algorithm incremental capacity analysis Li-S battery long short-term memory state of health

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