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Deformation mechanism of commercially pure titanium under biaxial loading at ambient and elevated temperatures

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Journal of Materials Science & Technology 2022年第31期126卷 237-251页

作者： Yuanjie Fu Yao Cheng Yun Cui Yunchang Xin yuyao zeng Xiao Liu Gang Chen School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjingJiangsu 210009China School of Chemical Engineering and Technology Tianjin Ren’ai CollegeTianjin 301636China Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology Tianjin 300350China Zhejiang Institute of Tianjin University NingboZhejiang 315201China Nuclear Power Institute of China ChengduSichuan 610015China

Commercially pure(CP)titanium is thermally processed and subjected to biaxial ***,the evolution of the microstructural deformation mechanisms under such circumstances is not adequately *** this study,the mechanical responses and microstructural deformation mechanisms of TA2 CP titanium sheets under equi-biaxial loading at room temperature(RT),300℃,and 400℃were *** activated slip and twinning systems were investigated by transmission electron microscopy(TEM)after polished cruciform specimens were biaxially tensile-tested at RT and elevated *** results show that{11¯22}contraction twinning and{10¯12}extension twinning are the main deforma-tion mechanisms of RT biaxial deformation,while dislocation glide is predominant in biaxial deformation at 300℃and 400℃.This difference yields varied work-hardening behaviors at RT and elevated *** biaxial deformation at 400℃,the main slip trace type is multiple *** interaction of different slip systems in multiple slip created shear deformation concentration areas and further induced ***,in biaxial deformation at 300℃,the amounts of simplex and multiple slip were significantly reduced compared to those at 400℃because the lower temperature increased the critical resolved shear stress and insufficient activated slip systems were available for grain ***-fore,several stress-concentration areas were generated with the activation of cross-slip.

关键词： CP titanium Biaxial tensile tests High temperature Dislocation glide TEM

Temperature-driven phase transformation and element segregation in Pd-Ru immiscible alloy nanoparticles:Spatial resolving of elements and insights for electrocatalysis

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Nano Research 2023年第7期16卷 9968-9976页

作者： Hui Li Zheng Hu Yu Zhang Wenbo Zhao yuyao zeng Wei Zhou Shi Hu Department of Chemistry School of ScienceTianjin Key Laboratory of Molecular Optoelectronic ScienceTianjin UniversityTianjin 300072China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China Department of Physics School of ScienceTianjin Key Laboratory of Molecular Optoelectronic ScienceTianjin UniversityTianjin 300072China

Bimetallic alloys could form three typical structures including solid solution,heterostructure,and intermetallic compound,depending on the interactions between identical and different *** the trend can be predicted by the types of binary phase diagram,different synthetic protocols will trap the system in various kinetic intermediates among the three typical ***,we studied the phase evolution and elemental segregation in the alloy nanoparticles of immiscible Pd-Ru before and after thermal *** developing an analysis method of local element segregation(LES)based on the energy dispersive spectroscopy(EDS)mapping signals,we were able to quantify the mixing of Pd and Ru atoms during the gradual phase transition from face-centered cubic(fcc)to hexagonal close packed(hcp).Density functional theory was also applied to calculate the energies of all possible PdRu4 structures(93 fcc models and 267 hcp models),which helps to rationalize the phase transition and element *** annealing process also leads to the change of the electronic structure,which further influences the performance in the electrocatalytic hydrogen evolution *** highest activity of PdRu4-400 was largely attributed to the proper interface between the Pd-rich fcc phase and Ru-rich hcp phase,as revolved by the above methods.

关键词： Pd-Ru alloy short-range order local element segregation hydrogen evolution reaction

Immunogenicity and protective efficacy of recombinant fusion proteins containing spike protein of infectious bronchitis virus and hemagglutinin of H3N2 influenza virus in chickens

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Immunogenicity and protective efficacy of recombinant fusion...

Ce改性CuO/γ-Al_(2)O_(3)用于催化燃烧中Ce作用的探究

第六届中国兽药大会

作者： Lijuan Yin yuyao zeng Wei Wang Ying Wei Chunyi Xue Yongchang Cao State Key Laboratory of Biocontrol School of Life SciencesSun Yat-sen University Linyi Institute for Food and Drug Control

Infectious bronchitis(IB) is an acute and highly contagious viral respiratory disease of chickens and vaccination is the main method for disease *** S1 protein,which contains several virus neu

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天津大学学报（自然科学与工程技术版） 2021年第6期54卷 627-635页

作者：李阳邱鹏志王博威曾钰耀陈立功闫喜龙天津大学化工学院天津300350 天津化学化工协同创新中心天津300072 天津市功能精细化工工程研究中心天津300072

针对CuO(20%)/γ-Al_(2)O_(3)催化剂催化燃烧性能的欠缺,通过共沉淀捏合法制备了CuO(20%)/Ce_(x)Al_(100-x)O_(y)(x=1,3,5,7,10,12)系列催化剂,并通过XRD、BET、XPS、H2-TPR、TEM等系列表征方法对催化剂进行了表征,研究了Ce掺杂对催化燃烧效果的影响.表征结果表明,Ce掺杂可以促进催化剂表面CuO的分散,为反应提供更多活性位点,增强催化剂的低温还原性,并提供更多的表面吸附氧,这些都有利于催化燃烧活性的提高.同时,所有催化剂均在以典型的VOC甲苯作为底物的催化燃烧实验中进行了评估,其中CuO(20%)/Ce_(7)Al_(93)O_(y)表现出最高的催化燃烧活性,与CuO(20%)/γ-Al_(2)O_(3)相比,其T90降低了约30℃.比较其他结果,掺杂量低时,催化剂改性结果较差;而在掺杂量过多时,反而会严重损害催化剂性质,如催化剂中的γ-Al_(2)O_(3)骨架可能会坍塌,影响催化燃烧活性.这可以证明Ce掺杂可以有效提高催化剂的燃烧活性,而合适的Ce掺杂量对催化剂改性是很关键的.同时,还对所得的最优催化剂进行了稳定性和普适性的测试,并得出了较好的结果.综上,本研究集中于掺杂量对催化剂的影响,为后续研究提供了理论基础.

关键词：催化燃烧铜基铈改性掺杂量的影响

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某砖砌挡土墙垮塌事故的原因分析

长沙航空职业技术学院学报 2013年第2期13卷 65-69页

作者：荣誉曾钰尧长沙航空职业技术学院 95402部队

针对某砖砌挡土墙垮塌事故,分析了事故发生的原因,通过对现场砂浆强度及排水措施等项目进行检测鉴定,得出砂浆强度与排水不满足要求,按照现行规范对挡土墙进行了设计复核,得出挡土墙抗滑移与抗倾覆不满足要求。对类似挡土墙的鉴定与排... 详细信息

针对某砖砌挡土墙垮塌事故,分析了事故发生的原因,通过对现场砂浆强度及排水措施等项目进行检测鉴定,得出砂浆强度与排水不满足要求,按照现行规范对挡土墙进行了设计复核,得出挡土墙抗滑移与抗倾覆不满足要求。对类似挡土墙的鉴定与排查有借鉴意义。

关键词：挡土墙砂浆强度滑移

Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man Han Deyang zeng Wei Tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen Wei Yufei Mei Yan zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

Glucocorticoid receptor signaling in the brain and its involvement in cognitive function

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Neural Regeneration Research 2025年第9期20卷 2520-2537页

作者： Chonglin Su Taiqi Huang Meiyu Zhang Yanyu Zhang Yan zeng Xingxing Chen Brain Science and Advanced Technology Institute Hubei Province Key Laboratory of Occupational Hazard Identification and ControlSchool of MedicineWuhan University of Science and TechnologyWuhanHubei ProvinceChina

The hypothalamic-pituitary-adrenal axis regulates the secretion of glucoco rticoids in response to environmental *** the brain,a nuclear receptor transcription fa ctor,the glucocorticoid recepto r,is an important component of the hypothalamicpituitary-a d renal axis's negative feedback loop and plays a key role in regulating cognitive equilibrium and *** glucoco rticoid receptor influences cognitive processes,including glutamate neurotransmission,calcium signaling,and the activation of brain-derived neurotrophic factor-mediated pathways,through a combination of genomic and non-genomic *** interactions within the central nervous system can alter the expression and activity of the glucocorticoid receptor,there by affecting the hypothalamic-pituitary-a d renal axis and stress-related cognitive *** appropriate level of glucocorticoid receptor expression can improve cognitive function,while excessive glucocorticoid receptors or long-term exposure to glucoco rticoids may lead to cognitive *** with cognitive impairment-associated diseases,such as Alzheimer's disease,aging,depression,Parkinson's disease,Huntington's disease,stroke,and addiction,often present with dysregulation of the hypothalamic-pituitary-adrenal axis and glucocorticoid receptor *** review provides a comprehensive overview of the functions of the glucoco rticoid receptor in the hypothalamic-pituitary-a d renal axis and cognitive *** emphasizes that appropriate glucocorticoid receptor signaling fa cilitates learning and memory,while its dysregulation can lead to cognitive *** provides clues about how glucocorticoid receptor signaling can be targeted to ove rcome cognitive disability-related disorders.

关键词： brain-derived neurotrophic factor calcium signaling glucocorticoid receptor glucocorticoid glutamate transmission hypothalamic-pituitary-adrenal axis long-term potentiation neurocognitive disorders neuroplasticity stress

Role of metabolic dysfunction and inflammation along the liver-brain axis in animal models with obesity-induced neurodegeneration

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Neural Regeneration Research 2025年第4期20卷 1069-1076页

作者： Evridiki Asimakidou Eka Norfaishanty Saipuljumri Chih Hung Lo Jialiu zeng Department of Clinical Neurosciences University of CambridgeCambridgeUK School of Applied Science Republic PolytechnicSingaporeSingapore Lee Kong Chian School of Medicine Nanyang Technological UniversitySingaporeSingapore

The interaction between metabolic dysfunction and inflammation is central to the development of neurodegenerative diseases such as Alzheimer’s disease and Parkinson’s ***-related conditions like type 2 diabetes and non-alcoholic fatty liver disease exacerbate this *** lipid accumulation,particularly in the liver,initiates a cascade of inflammatory processes that extend to the brain,influencing critical metabolic regulatory *** and palmitate,key lipid components,along with lipid transporters lipocalin-2 and apolipoprotein E,contribute to neuroinflammation by disrupting blood–brain barrier integrity and promoting *** insulin resistance further exacerbates brain insulin resistance and *** interventions targeting peripheral lipid metabolism and insulin signaling pathways have shown promise in reducing neuroinflammation in animal ***,translating these findings to clinical practice requires further investigation into human *** conclusion,metabolic dysfunction,peripheral inflammation,and insulin resistance are integral to neuroinflammation and *** these complex mechanisms holds potential for identifying novel therapeutic targets and improving outcomes for neurodegenerative diseases.

关键词： Alzheimer’s disease inflammatory cytokines insulin resistance lipid

Boosting hydrocarbon conversion via Cu-doping induced oxygen vacancies on CeO2 in CO2 electroreduction

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Journal of Energy Chemistry 2025年第1期100卷 66-76页

作者： Lei Xue Tong Shi Chenhui Han Heng Zhang Fenrong Liu Haorun Li Yan Wang Xiaojun Gu Shanghong zeng Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials School of Chemistry and Chemical Engineering Inner Mongolia University State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Institute of Catalysis Department of Chemistry Zhejiang University National Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare Earths

Conversion of CO2back to hydrocarbons is the most direct way of closing the“carbon cycle”,and its significance is further enlarged if this process is driven by renewable energies such as ***,precisely controlling the product selectivity towards hydrocarbons against the competitive hydrogen evolution remains challenging,especially for Cu-based ***,we report a novel defect engineering strategy,by which Cu-doping-induced oxygen vacancies on CeO2nanorods were effectively created,with adjustable vacancy/Cu *** resulting optimum catalyst shows up to 79% catalytic current density to hydrocarbons （excluding CO）,with 49% faradaic efficiency to *** and density functional theory unveil that the ratio between oxygen vacancy and Cu affects significantly the formation of*CHO and activation of H2O,which leads to the following deep hydrogenation to *** findings may spur new insights for designing and developing more controllable chemical process relevant to CO2utilization.

关键词： Oxygen vacancy Hydrocarbon production Reaction mechanism