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Research on the impact of high-temperature aging on the thermal safety of lithium-ion batteries 被引量:11
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作者 Guangxu Zhang Xuezhe Wei +5 位作者 Siqi Chen Gang Wei Jiangong Zhu Xueyuan Wang Guangshuai Han Haifeng Dai 《Journal of Energy Chemistry》 SCIE EI CSCD 2023年第12期378-389,I0010,共13页
Understanding the thermal safety evolution of lithium-ion batteries during high-temperature usage conditions bears significant implications for enhancing the safety management of aging batteries.This work investigates... Understanding the thermal safety evolution of lithium-ion batteries during high-temperature usage conditions bears significant implications for enhancing the safety management of aging batteries.This work investigates the thermal safety evolution mechanism of lithium-ion batteries during high-temperature aging.Similarities arise in the thermal safety evolution and degradation mechanisms for lithium-ion batteries undergoing cyclic aging and calendar aging.Employing multi-angle characterization analysis,the intricate mechanism governing the thermal safety evolution of lithium-ion batteries during high-temperature aging is clarified.Specifically,lithium plating serves as the pivotal factor contributing to the reduction in the self-heating initial temperature.Additionally,the crystal structure of the cathode induced by the dissolution of transition metals and the reductive gas generated during aging attacking the crystal structure of the cathode lead to a decrease in thermal runaway triggering temperature.Furthermore,the loss of active materials and active lithium during aging contributes to a decline in both the maximum temperature and the maximum temperature rise rate,ultimately indicating a decrease in the thermal hazards of aging batteries. 展开更多
关键词 Lithium-ion batteries high-temperature aging Thermal safety DEGRADATION Lithium plating
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Quantifying Global Black Carbon Aging Responses to Emission Reductions Using a Machine Learning-based Climate Model 被引量:1
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作者 Wenxiang SHEN Minghuai WANG +5 位作者 Junchang WANG Yawen LIU Xinyi DONG Xinyue SHAO Man YUE Yaman LIU 《Advances in Atmospheric Sciences》 2026年第2期361-372,I0004-I0009,共18页
Countries around the world have been making efforts to reduce pollutant emissions. However, the response of global black carbon(BC) aging to emission changes remains unclear. Using the Community Atmosphere Model versi... Countries around the world have been making efforts to reduce pollutant emissions. However, the response of global black carbon(BC) aging to emission changes remains unclear. Using the Community Atmosphere Model version 6 with a machine-learning-integrated four-mode version of the Modal Aerosol Module, we quantify global BC aging responses to emission reductions for 2011–2018 and for 2050 and 2100 under carbon neutrality. During 2011–18, global trends in BC aging degree(mass ratio of coatings to BC, R_(BC)) exhibited marked regional disparities, with a significant increase in China(5.4% yr^(-1)), which contrasts with minimal changes in the USA, Europe, and India. The divergence is attributed to opposing trends in secondary organic aerosol(SOA) and sulfate coatings, driven by regional changes in the emission ratios of corresponding coating precursors to BC(volatile organic compounds-VOCs/BC and SO_(2)/BC). Projections under carbon neutrality reveal that R_(BC) will increase globally by 47%(118%) in 2050(2100), with strong convergent increases expected across major source regions. The R_(BC) increase, primarily driven by enhanced SOA coatings due to sharper BC reductions relative to VOCs, will enhance the global BC mass absorption cross-section(MAC) by 11%(17%) in 2050(2100).Consequently, although the global BC burden will decline sharply by 60%(76%), the enhanced MAC partially offsets the magnitude of the decline in the BC direct radiative effect, resulting in the moderation of global BC DRE decreases to 88%(92%) of the BC burden reductions in 2050(2100). This study highlights the globally enhanced BC aging and light absorption capacity under carbon neutrality, thereby partly offsetting the impact of BC direct emission reductions on future changes in BC radiative effects globally. 展开更多
关键词 black carbon aging trend emission reduction carbon neutrality machine learning
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Effect of Substrate Micro-arc Oxidation Pretreatment on Microstructure and High-Temperature Oxidation Resistance of Si-Cr-Ti-Zr Coating on Ta12W Alloy
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作者 Yang Fan Chang Jianxiu +2 位作者 Wang Xin Li Hongzhan Yan Peng 《稀有金属材料与工程》 北大核心 2026年第1期92-104,共13页
To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretre... To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretreatment was employed to construct a Ta_(2)O_(5)ceramic layer on the Ta12W alloy surface.Subsequently,a slurry spraying-vacuum sintering method was used to prepare a Si-Cr-Ti-Zr coating on the pretreated substrate.Comparative studies were conducted on the microstructure,phase composition,and isothermal oxidation resistance(at 1600℃)of the as-prepared coatings with and without the micro-arc oxidation ceramic layer.The results show that the Ta_(2)O_(5)layer prepared at 400 V is more continuous and has smaller pores than that prepared at 350 V.After microarc oxidation pretreatment,the Si-Cr-Ti-Zr coating on Ta12W alloy consists of three distinct layers:an upper layer dominated by Ti_(5)Si_(3),Ta_(5)Si_(3),and ZrSi;a middle layer dominated by TaSi_(2);a coating/substrate interfacial reaction layer dominated by Ta_(5)Si_(3).Both the Si-Cr-Ti-Zr coatings with and without the Ta_(2)O_(5)ceramic layer do not fail after isothermal oxidation at 1600℃for 5 h.Notably,the addition of the Ta2O5 ceramic layer reduces the high-temperature oxidation rate of the coating. 展开更多
关键词 tantalum-tungsten alloy silicide coating micro-arc oxidation reaction formation mechanism high-temperature oxidation
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Micro-Nanostructured High-Strength and High-Conductivity Cu0.9Cr0.1Zr Alloy Prepared by C-ECAP,Cryogenic Rolling,and Aging
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作者 Guo Tingbiao Li Yingying +5 位作者 Qian Danchen Deng Yang Zhang Guoqing Wang Yanfeng Li Wenbing Ling Dekui 《稀有金属材料与工程》 北大核心 2026年第4期914-925,共12页
The Cu0.9Cr0.1Zr alloy was deformed through continuous equal channel angular pressing(C-ECAP)through Route A,followed by liquid nitrogen cryogenic rolling(CR)and aging treated at 450℃.The microstructure,mechanical pr... The Cu0.9Cr0.1Zr alloy was deformed through continuous equal channel angular pressing(C-ECAP)through Route A,followed by liquid nitrogen cryogenic rolling(CR)and aging treated at 450℃.The microstructure,mechanical properties,and conductivity of the alloy were detected by electron back-scattered diffractometer,energy dispersive spectroscope,X-ray diffractometer,scanning electron microscope,and transmission electron microscope.The evolution mechanism of the texture during the deformation process and its influence on mechanical properties were analyzed.The results show that directional shear bands form in the CuCrZr alloy during the C-ECAP process,and the preferred orientation of the microstructure is consistent with the rolling direction.After deformation,the number of precipitated phases(mainly Cr)increases with the prolongation of aging time,accompanied by the appearance of micro-nanostructured fibrous structure in the alloy.After C-ECAP for three passes,75%CR deformation,and aging at 450℃ for 2 h,the tensile strength,microhardness,and conductivity reach 538 MPa,168 HV,and 80%IACS,respectively.CR,aging heat treatment,and formation of recrystallization texture are all conducive to the improvement of conductivity. 展开更多
关键词 C-ECAP CR aging heat treatment precipitated phases MICRO-NANOSTRUCTURE
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Orthogonal Optimization of Solution Treatment and Aging Process for TB18 Titanium Alloy and Toughness Regulation Mechanism
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作者 Gao Huixian Li Ke +7 位作者 Shao Shan Yang Haoxue Li Qinqin Zhao Yanru Luo Wenzhong Feng Yong Lei Qiang Liu Xianghong 《稀有金属材料与工程》 北大核心 2026年第4期841-855,共15页
To investigate the effect of solution treatment and aging process parameters on the microstructure and mechanical properties of TB18 titanium alloy,process optimization research was conducted based on the mixed-level ... To investigate the effect of solution treatment and aging process parameters on the microstructure and mechanical properties of TB18 titanium alloy,process optimization research was conducted based on the mixed-level orthogonal experiment design of factor levels.Results show that through range analysis,the significance order of process parameters is determined as follows:solution cooling method>solution temperature>aging time>aging temperature>solution time.Considering the strength-ductility matching and engineering application requirements,the benchmark parameters are selected as solution time of 1 h,solution cooling method of air cooling(AC),aging temperature of 525℃,and aging time of 4 h.Furthermore,the effects of solution temperature in the range of 790–870℃ on the impact toughness and micro-fracture characteristics of the alloy were studied.The results reveal that the larger the area of shear lip and fibrous zone,and the smaller the area of radiation zone,the better the toughness of the alloy.With the increase in solution temperature,the length of secondary cracks on the fracture surface increases,the number of dimples increases,and the toughness is enhanced.Based on the collaborative optimization of strength and toughness,the optimal heat treatment process for TB18 alloy is determined as 870℃/1 h,AC+525℃/4 h,AC. 展开更多
关键词 TB18 titanium alloy solution and aging orthogonal test TOUGHNESS MICROSTRUCTURE
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Combing the Entropy Weight Method with Fuzzy Mathematics for Assessing the Quality and Post-Ripening Mechanism of High-Temperature Daqu during Storage 被引量:1
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作者 YANG Junlin YANG Shaojuan +8 位作者 WU Cheng YIN Yanshun YOU Xiaolong ZHAO Wenyu ZHU Anran WANG Jia HU Feng HU Jianfeng WANG Diqiang 《食品科学》 北大核心 2025年第9期48-62,共15页
This study investigated the physicochemical properties,enzyme activities,volatile flavor components,microbial communities,and sensory evaluation of high-temperature Daqu(HTD)during the maturation process,and a standar... This study investigated the physicochemical properties,enzyme activities,volatile flavor components,microbial communities,and sensory evaluation of high-temperature Daqu(HTD)during the maturation process,and a standard system was established for comprehensive quality evaluation of HTD.There were obvious changes in the physicochemical properties,enzyme activities,and volatile flavor components at different storage periods,which affected the sensory evaluation of HTD to a certain extent.The results of high-throughput sequencing revealed significant microbial diversity,and showed that the bacterial community changed significantly more than did the fungal community.During the storage process,the dominant bacterial genera were Kroppenstedtia and Thermoascus.The correlation between dominant microorganisms and quality indicators highlighted their role in HTD quality.Lactococcus,Candida,Pichia,Paecilomyces,and protease activity played a crucial role in the formation of isovaleraldehyde.Acidic protease activity had the greatest impact on the microbial community.Moisture promoted isobutyric acid generation.Furthermore,the comprehensive quality evaluation standard system was established by the entropy weight method combined with multi-factor fuzzy mathematics.Consequently,this study provides innovative insights for comprehensive quality evaluation of HTD during storage and establishes a groundwork for scientific and rational storage of HTD and quality control of sauce-flavor Baijiu. 展开更多
关键词 microbial community high-temperature Daqu comprehensive quality evaluation entropy weight method maturation process
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Aging epigenome begins to change in age-related neurodegenerative diseases
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作者 Adam Zaretsky Debra Toiber 《Neural Regeneration Research》 2026年第7期2964-2965,共2页
With the rapid increase in the aging population comes a rise in the incidence and prevalence of neurodegenerative diseases.Therefore,it is critical to understand the molecular changes that occur,which can either cause... With the rapid increase in the aging population comes a rise in the incidence and prevalence of neurodegenerative diseases.Therefore,it is critical to understand the molecular changes that occur,which can either cause disease or make brains resilient.Epigenetic changes are a common suspect and target,not only because they are among the hallmarks of aging,but also because they are flexible and could potentially be reversed. 展开更多
关键词 aging hallmarks RESILIENCE neurodegenerative diseases molecular changes aging epigenome epigenetic changes
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Preparation of a CaZrO_(3)crucible material and its corrosion resistance to nickel-based high-temperature alloys
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作者 Wen-Gang Yang Hong-Xia Li +4 位作者 Yue Lu Ling-Yan Yu Qiang Gu Fan Qian Guo-Qi Liu 《Journal of Iron and Steel Research International》 2026年第3期183-192,共10页
A calcium zirconate crucible material with excellent performance was prepared by fixing the particle size proportion and exploring the addition of Y_(2)O_(3).The results show that Y^(3+)solid-dissolves into c-ZrO_(2)t... A calcium zirconate crucible material with excellent performance was prepared by fixing the particle size proportion and exploring the addition of Y_(2)O_(3).The results show that Y^(3+)solid-dissolves into c-ZrO_(2)to occupy the Zr^(4+)positions,leading to structural defects and promoting the sintering of calcium zirconate.Adding 0.5 wt.%Y_(2)O_(3)into calcium zirconate can enhance the modulus of rupture,reduce the thermal expansion coefficient,and improve the thermal shock resistance.Through high-temperature test,it is found that adding 0.5 wt.%Y_(2)O_(3)significantly improves the corrosion resistance of the sample. 展开更多
关键词 Calcium zirconate high-temperature alloy MELTING Corrosion resistance
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Alpha-synuclein-induced upregulation of SKI family transcriptional corepressor 1: A new player in aging and Parkinson's disease?
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作者 Lauren Barrett Rebekah Bevans +2 位作者 Aideen M.Sullivan Louise M.Collins Gerard W.O’Keeffe 《Neural Regeneration Research》 2026年第1期320-321,共2页
SKI family transcriptional corepressor 1(SKOR1also known as LbxCor1, Fussel15, or CORL1), is a member of the SKI family of proteins and is transcribed from a protein-coding gene located on chromosome 15 in humans, tha... SKI family transcriptional corepressor 1(SKOR1also known as LbxCor1, Fussel15, or CORL1), is a member of the SKI family of proteins and is transcribed from a protein-coding gene located on chromosome 15 in humans, that has a molecular weight of approximately 100 kDa. Skor1 is highly expressed in neurons in the central nervous system of both humans and rodents. 展开更多
关键词 Alpha Cor aging
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Effect of heat treatment parameters on microstructure evolution and high-temperature mechanical properties of Ti–43Al–9V–0.2Y rolled plates
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作者 Yang-Jie Gao Hai-Tao Jiang +2 位作者 Shi-Wei Tian Si-Yuan Zhang Zhi-Chao Zhu 《Journal of Iron and Steel Research International》 2026年第2期1-16,共16页
The phase transformation and mechanical behavior of Ti-43Al-9V-0.2Y alloy under varied heat treatments were systematically investigated.The cooling phase sequence is identified as β→β+α→α→γ+α(α_(2))→β+γ+... The phase transformation and mechanical behavior of Ti-43Al-9V-0.2Y alloy under varied heat treatments were systematically investigated.The cooling phase sequence is identified as β→β+α→α→γ+α(α_(2))→β+γ+α(α_(2))→β(β_(0))+γ.Above 1240℃,slow cooling forms lamellar structures via α→γ+α(α_(2))→β+γ+α(α_(2)),while fast cooling follows α→γ+α→β(β_(0))+γ;below 1240℃,α→γ+α(α_(2))dominates.At 800℃ and 1.0×10^(−4)s^(−1),γphase in duplex microstructures restricts dislocation slip due to low stacking fault energy,promoting dynamic recrystallization.Mixed microstructure(γ/β_(0) lamellar and duplex microstructure)achieves a remarkable strength-ductility product of 4907 MPa%through synergistic effects:the duplex enhances plasticity,while the lamellar improves strength.In both microstructures,limited dislocation slip/climb in β_(0) phases creates dislocation density gradients at γ/β_(0) interfaces,inducing micro-void nucleation and microcracks in β_(0).γ phase impedes defect propagation,and micro-voids further suppress crack growth.The crack propagation in α_(2)/γ lamellar microstructure depends on stress direction:parallel stress hinders crack initiation and growth,while perpendicular stress promotes crack nucleation and expansion. 展开更多
关键词 TiAl alloy Heat treatment high-temperature tensile test Lamellar microstructure Duplex microstructure
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Recent advances in high-temperature oxidation behavior and underlying mechanisms of Mg-RE alloys:A comprehensive review
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作者 Yu Ma Yu Cao +4 位作者 Yulian Kuang Yajun Wang Yuhao Gong Bin Jiang Jonghyun Kim 《International Journal of Minerals,Metallurgy and Materials》 2026年第2期446-466,共21页
The limited high-temperature oxidation resistance of Mg alloys is a key factor restricting their development and application.The addition of some rare earth elements(REs),owing to their unique physical and chemical pr... The limited high-temperature oxidation resistance of Mg alloys is a key factor restricting their development and application.The addition of some rare earth elements(REs),owing to their unique physical and chemical properties,can significantly enhance the oxidation resistance of Mg alloys.Based on our previous study,we conclude that REs such as Gd,Y,and Ce enhance the oxidation resistance of Mg-RE alloys.This article comprehensively reviews recent research progress on high-temperature oxidation behavior and the potential mechanism in Mg-RE alloys.Based on the thermodynamic and kinetic analyses,the evolution of the complex oxide system formed during the high-temperature oxidation of Mg-RE alloys is first summarized.The diffusion behavior and concentration control mechanisms of REs during the oxidation process and how these mechanisms affect the sustained growth of the oxide film and antioxidant properties were elucidated.Moreover,the different structures of the oxide films were classified,and their properties were discussed.Finally,this paper introduces the applications of commonly used REs in Mg alloys and frontier research on their oxidation mechanisms.Based on the above review,we propose that future research perspectives can be explored in terms of expanding the experimental temperature range for oxidation tests,optimizing the chemical composition by adding trace REs to study their synergistic mechanism,revealing the underlying oxidation mechanism through advanced in situ microscopic characterization methods,and investigating the mechanical properties of oxide films using diverse approaches. 展开更多
关键词 magnesium-rare earth element alloy high-temperature oxidation THERMODYNAMICS oxidation resistance oxide films
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Analysis of DC Aging Characteristics of Stable ZnO Varistors Based on Voronoi Network and Finite Element Simulation Model
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作者 ZHANG Ping LU Mingtai +1 位作者 LU Tiantian YUE Yinghu 《材料导报》 北大核心 2026年第2期20-28,共9页
In modern ZnO varistors,traditional aging mechanisms based on increased power consumption are no longer relevant due to reduced power consumption during DC aging.Prolonged exposure to both AC and DC voltages results i... In modern ZnO varistors,traditional aging mechanisms based on increased power consumption are no longer relevant due to reduced power consumption during DC aging.Prolonged exposure to both AC and DC voltages results in increased leakage current,decreased breakdown voltage,and lower nonlinearity,ultimately compromising their protective performance.To investigate the evolution in electrical properties during DC aging,this work developed a finite element model based on Voronoi networks and conducted accelerated aging tests on commercial varistors.Throughout the aging process,current-voltage characteristics and Schottky barrier parameters were measured and analyzed.The results indicate that when subjected to constant voltage,current flows through regions with larger grain sizes,forming discharge channels.As aging progresses,the current focus increases on these channels,leading to a decline in the varistor’s overall performance.Furthermore,analysis of the Schottky barrier parameters shows that the changes in electrical performance during aging are non-monotonic.These findings offer theoretical support for understanding the aging mechanisms and condition assessment of modern stable ZnO varistors. 展开更多
关键词 ZnO varistors Voronoi network DC aging finite element method(FEM) current distribution double Schottky barrier theory
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Synaptic mitochondria in aging and neurodegenerative diseases:Functional decline and vulnerability
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作者 Karina A.Cicali Angie K.Torres Cheril Tapia-Rojas 《Neural Regeneration Research》 2026年第6期2145-2152,共8页
Aging is a physiological and complex process produced by accumulative age-dependent cellular damage,which significantly impacts brain regions like the hippocampus,an essential region involved in memory and learning.A ... Aging is a physiological and complex process produced by accumulative age-dependent cellular damage,which significantly impacts brain regions like the hippocampus,an essential region involved in memory and learning.A crucial factor contributing to this decline is the dysfunction of mitochondria,particularly those located at synapses.Synaptic mitochondria are specialized organelles that produce the energy required for synaptic transmission but are also important for calcium homeostasis at these sites.In contrast,non-synaptic mitochondria primarily involve cellular metabolism and long-term energy supply.Both pools of mitochondria differ in their form,proteome,functionality,and cellular role.The proper functioning of synaptic mitochondria depends on processes such as mitochondrial dynamics,transport,and quality control.However,synaptic mitochondria are particularly vulnerable to age-associated damage,characterized by oxidative stress,impaired energy production,and calcium dysregulation.These changes compromise synaptic transmission,reducing synaptic activity and cognitive decline during aging.In the context of neurodegenerative diseases such as Alzheimer’s,Parkinson’s,and Huntington’s,the decline of synaptic mitochondrial function is even more pronounced.These diseases are marked by pathological protein accumulation,disrupted mitochondrial dynamics,and heightened oxidative stress,accelerating synaptic dysfunction and neuronal loss.Due to their specialized role and location,synaptic mitochondria are among the first organelles to exhibit dysfunction,underscoring their critical role in disease progression.This review delves into the main differences at structural and functional levels between synaptic and non-synaptic mitochondria,emphasizing the vulnerability of synaptic mitochondria to the aging process and neurodegeneration.These approaches highlight the potential of targeting synaptic mitochondria to mitigate age-associated cognitive impairment and synaptic degeneration.This review emphasizes the distinct vulnerabilities of hippocampal synaptic mitochondria,highlighting their essential role in sustaining brain function throughout life and their promise as therapeutic targets for safeguarding the cognitive capacities of people of advanced age. 展开更多
关键词 aging HIPPOCAMPUS MEMORY MITOCHONDRIA synaptic mitochondria
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Coke Oven Emissions and Biological Aging:Evidence from a Longitudinal Study among Workers
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作者 Xiaoyu Hao Zhiguang Gu +6 位作者 Bin Yang Xiangkai Zhao Shaofei Yu Dongsheng Hu Pengpeng Wang Ming Zhang Wei Wang 《Biomedical and Environmental Sciences》 2026年第3期356-361,共6页
Biological aging is a complex physiological process characterized by a decline in tissue function and the loss of cellular capabilities,which increase an individual's risk of various diseases[1].While genetic fact... Biological aging is a complex physiological process characterized by a decline in tissue function and the loss of cellular capabilities,which increase an individual's risk of various diseases[1].While genetic factors and lifestyle are key influences on biological aging,environmental factors also play a significant role.Given the rapid aging of the global population,elucidating the factors that influence biological aging is crucial for promoting healthy aging. 展开更多
关键词 biological aging Coke Oven Emissions Workers Genetic Factors decline tissue function factors influence biological aging Environmental Factors Longitudinal Study
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Production of functional food Shuangshen tablets and their preventive effects on brain and liver injuries associated with D-galactose-induced aging in mice:an oxidative stress inhibition-based mechanism
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作者 Ru-Ping Xiao Si-Wen Zheng +8 位作者 Hong-Yue Gao Heng Wei Ming Liang Rui Zhang Wan-Ying Li He Yang Nan-Qi Zhang Ying-Ping Wang Song-Yun Han 《Traditional Medicine Research》 2026年第8期28-42,共15页
Background:Aging is a key risk factor for human health,causing damage to the brain and liver tissues.Accumulating evidence indicates that oxidative stress is a critical driver of the aging process.Shuangshen tablet(SS... Background:Aging is a key risk factor for human health,causing damage to the brain and liver tissues.Accumulating evidence indicates that oxidative stress is a critical driver of the aging process.Shuangshen tablet(SST),a functional food formulated with Ginseng Radix et Rhizoma and Apostichopus japonicus as main ingredients,possesses potential antioxidant and anti-aging properties.Thus,this study aimed to evaluate the anti-aging effects of SST using a D-galactose-induced aging model.Methods:The formula of SST was optimized via single-factor experiments and response surface methodology.Chemical components of SST were identified by UHPLC-Q-Exactive Orbitrap HRMS,and their in vitro antioxidant activity was determined.D-galactose-induced aging mice were intervened with SST,followed by detection of serum oxidative stress and pro-inflammatory factor levels,as well as the activities of superoxide dismutase(SOD),catalase(CAT),glutathione peroxidase(GSH-Px),and malondialdehyde(MDA)content in brain and liver tissues.Hematoxylin and eosin(HE)staining was used to observe brain and liver histopathological changes.Mechanistic studies were conducted to analyze the protein expression levels of Nrf2-HO-1 pathway-related proteins,phosphorylated PI3K(p-PI3K),and phosphorylated AKT(p-AKT).Acute and subacute toxicity tests were performed to evaluate the safety of SST.Results:A total of 46 active components were identified from SST,including ketones,terpenes,phenylpropanoids,and organic acids.SST intervention significantly regulated serum oxidative stress and pro-inflammatory factor levels in aging mice:it reduced MDA content in brain and liver tissues,increased SOD,CAT,and GSH-Px activities,and decreased serum tumor necrosis factor-alpha(TNF-α),interleukin-6(IL-6),and interleukin-1β(IL-1β)levels.HE staining showed that SST alleviated D-galactose-induced brain and liver damage.Mechanistically,SST mitigated oxidative damage by activating the Nrf2-HO-1 pathway and upregulating the protein expression of p-PI3K and p-AKT.Acute and subacute toxicity tests confirmed the safety of SST.Conclusion:SST can effectively delay the D-galactose-induced aging process by improving the oxidative stress signaling pathway,providing a theoretical basis for the development of antioxidant functional foods. 展开更多
关键词 functional food ANTIOXIDANT aging subacute toxicity
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Constitutive modeling of solvent plasticization and physical aging in glassy polymers
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作者 Xu CAO Kerong WU +1 位作者 Ji LIN Rui XIAO 《Applied Mathematics and Mechanics(English Edition)》 2026年第3期535-554,共20页
Glassy polymers are widely used in biomedical applications in a solvent environment,yet their long-term performance is governed by the competing effects of physical aging and solvent-induced plasticization.Here,we dev... Glassy polymers are widely used in biomedical applications in a solvent environment,yet their long-term performance is governed by the competing effects of physical aging and solvent-induced plasticization.Here,we develop a constitutive model that explicitly couples the solvent concentration,structural relaxation,and mechanical response.This framework is built on a multiplicative decomposition of deformation and an Eyring-type flow rule,with structural evolution described by an effective temperature.A generalized shift factor is introduced to quantify how the solvent concentration and effective temperature jointly affect the relaxation time,thereby integrating physical aging and plasticization.The model is subsequently applied to methacrylate(MA)-based copolymer networks immersed in phosphate-buffered saline for up to nine months.Simulations accurately capture key experimental features,including the strong softening of highly swellable networks,the partial recovery due to aging,and the mitigating role of hydrophobic crosslinking in reducing solvent uptake.While the current single-mode description cannot reproduce the full relaxation spectrum,it establishes an efficient framework for predicting the long-term mechanical performance under coupled environmental and mechanical loading.This study provides a constitutive description of solvent-swollen glassy polymers,offering mechanistic insight into the interplay between plasticization and aging.Beyond biomedical MA networks,this framework establishes a foundation for predicting the long-term performance of polymer glasses under coupled aqueous environmental and mechanical loading. 展开更多
关键词 glassy polymer SWELLING physical aging constitutive model
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High-temperature oxidation resistance of TiB_(2)coatings on molybdenum produced by molten salt electrophoretic deposition
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作者 Qian Kou Chuntao Ge +6 位作者 Yanlu Zhou Wenjuan Qi Junjie Xu Weiliang Jin Jun Zhang Hongmin Zhu Saijun Xiao 《International Journal of Minerals,Metallurgy and Materials》 2026年第1期282-291,共10页
TiB_(2)coatings can significantly enhance the high-temperature oxidation resistance of molybdenum,which would broaden the application range of molybdenum and alloys thereof.However,traditional methods for preparing Ti... TiB_(2)coatings can significantly enhance the high-temperature oxidation resistance of molybdenum,which would broaden the application range of molybdenum and alloys thereof.However,traditional methods for preparing TiB_(2)coatings have disadvantages such as high equipment costs,complicated processes,and highly toxic gas emissions.This paper proposes an environmentally friendly method,which requires inexpensive equipment and simple processing,for preparing TiB_(2)coating on molybdenum via electrophoretic deposition within Na3AlF6-based molten salts.The produced TiB_(2)layer had an approximate thickness of 60μm and exhibited high density,outstanding hardness(38.2 GPa)and robust adhesion strength(51 N).Additionally,high-temperature oxidation experiments revealed that,at900℃,the TiB_(2)coating provided effective protection to the molybdenum substrate against oxidation for 3 h.This result indicates that the TiB_(2)coating prepared on molybdenum using molten salt electrophoretic deposition possesses good high-temperature oxidation resistance. 展开更多
关键词 molten salt electrophoretic deposition MOLYBDENUM TiB_(2)coating high-temperature oxidation resistance
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3D printed high-temperature ceramic conformal array antenna:Design,analysis,manufacturing,and testing
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作者 Peng Li Ruibo Li +5 位作者 Zijiao Fan Jiujiu Han Guangda Ding Qunbiao Wang Wanye Xu Paolo Rocca 《Defence Technology(防务技术)》 2026年第1期340-353,共14页
In this study,the design,analysis,manufacturing,and testing of a 3D-printed conformal microstrip array antenna for high-temperature environments is presented.3D printing technology is used to fabricate a curved cerami... In this study,the design,analysis,manufacturing,and testing of a 3D-printed conformal microstrip array antenna for high-temperature environments is presented.3D printing technology is used to fabricate a curved ceramic substrate,and laser sintering and microdroplet spraying processes are used to add the conductive metal on the curved substrate.The problems of gain loss,bandwidth reduction,and frequency shift caused by high temperatures are addressed by using a proper antenna design,with parasitic patches,slots,and metal resonant cavities.The antenna prototype is characterized by the curved substrates and the conductive metals for the power dividers,the patch,and the ground plane;its performance is examined up to a temperature of 600℃in a muffle furnace and compared with the results from the numerical analysis.The results show that the antenna can effectively function at 600℃and even higher temperatures. 展开更多
关键词 Ceramic antenna Conformal array high-temperature environment 3D printing High gain and wide band
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Progress of Ganoderma lucidum in regulating aging-mediated disorders of glycolipid metabolism
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作者 Xiao-Hui Zhao Xiao-Wei Dai +3 位作者 Hong-Yan Pei Rui Du Wei Wang Zhong-Mei He 《Traditional Medicine Research》 2026年第5期68-80,共13页
As the aging population continues to grow,age-related health issues are becoming increasingly prominent,attracting widespread attention and concern from society.While research on the mechanisms of aging is relatively ... As the aging population continues to grow,age-related health issues are becoming increasingly prominent,attracting widespread attention and concern from society.While research on the mechanisms of aging is relatively extensive,studies on the association between aging and related diseases remain limited.G.lucidum,a traditional medicinal fungus,has garnered significant attention due to its diverse bioactive properties.Recent studies have revealed that G.lucidum and its active components exhibit significant potential in anti-aging and regulating dysregulation of glucose and lipid metabolism.However,a comprehensive and detailed review of recent research findings has yet to be thoroughly explored.This paper summarizes and elucidates the latest advances in the pathological mechanisms of aging-related glucose and lipid metabolism disorders by retrieving data from databases such as X-mol and PubMed,provides a detailed account of the regulatory effects of G.lucidum’s primary active components on aging and lipid metabolism,and explores their potential mechanisms.Additionally,it discusses the application prospects of G.lucidum in the fields of anti-aging and metabolic regulation,aiming to provide a reference for research on aging-mediated lipid metabolism disorders and to lay a theoretical foundation for the further development and application of G.lucidum. 展开更多
关键词 aging lipid metabolism G.lucidum
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Metabolite Profiling and Skin Anti-Aging Potential of Astragalus sarcocolla:Antioxidant,Enzyme Inhibitory,and Computational Insights
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作者 Shaimaa R.Ahmed Omnia M.Hendawy +2 位作者 Sumera Qasim Hanan Khojah Ambreen Malik Uttra 《Phyton-International Journal of Experimental Botany》 2026年第2期119-138,共20页
The study evaluated the skin anti-aging activity of Astragalus sarcocolla leaves extract(ASE)by assessing its antioxidant and inhibitory effect activity on matrix metalloproteinase(MMP),collagenase,elastase,hyaluronid... The study evaluated the skin anti-aging activity of Astragalus sarcocolla leaves extract(ASE)by assessing its antioxidant and inhibitory effect activity on matrix metalloproteinase(MMP),collagenase,elastase,hyaluronidase,and tyrosinase in relation to its chemical composition.Ultra Performance Liquid Chromatography-Mass Spectrometry(UPLC-MS)identified 27 metabolites(15 flavonoids,8 phenolic acids and their derivatives,and 4 coumarins).ASE showed strong antioxidant capacity in DPPH(IC_(50)value of 26.05μg/mL)and FRAP(2433μM FeSO_(4)/g extract)assays.The extract inhibited MMP-1 and MMP-9 in a concentration-dependent manner and suppressed collagenase,elastase,hyaluronidase,and tyrosinase activities(IC_(50)=35.038,40.748,61.389,and 30.980μg/mL,respectively).A network pharmacology study was conducted to uncover the mechanisms responsible for skin anti-aging effects,and molecular docking further evaluated interactions of key metabolites with hub targets.Twenty-one bioactive metabolites,selected based on oral bioavailability and drug-likeness,highlighted cinnamic acid,acacetin,luteolin,kaempferol,and apigenin as key compounds.MMP-9,ESR1,PTGS-2,and EGFR were identified as main targets.Docking studies revealed that acacetin and apigenin have stronger binding affinities to MMP-9,PTGS-2,and EGFR than other constituents.These findings suggest that ASE may serve as a natural multi-target skin anti-aging remedy with potential cosmetic applications. 展开更多
关键词 Astragalus sarcocolla metabolite profiling aging METALLOPROTEINASE network pharmacology
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