Results 21 to 30 of about 305,608 (149)
ABSTRACT Low‐temperature performance degradation limits lithium‐ion batteries (LIBs) in extreme climates and specialized applications. Electrolytes govern Li+ transport and interfacial reactions, whereas their solvation chemistry controls ionic conductivity, desolvation kinetics, and interphase stability.
Yuqing Chen +7 more
wiley +1 more source
ABSTRACT Pore engineering reduces the thermal conductivity of thermoelectric materials, yet typically degrades electrical conductivity by enhancing carrier scattering—a long‐standing trade‐off. Here, we overcome this trade‐off in SrTiO3‐based entropy‐engineered ceramics via a one‐step synergistic strategy: using poly(methyl methacrylate) (PMMA) as a ...
Ziyao Wei +7 more
wiley +1 more source
ABSTRACT Systematic studies on the fatigue deformation and damage mechanisms of nickel‐based single‐crystal superalloys (Ni‐SXs) under combined thermal and mechanical conditions remain limited, particularly regarding the influence of strain amplitude on the relative contributions of fatigue and oxidation damage.
Liyin Zhang +7 more
wiley +1 more source
目的研究亚低温状态下,大鼠急性脑缺血时氧自由基—超氧化物歧化酶(SOD)和一氧化氮(NO)、一氧化氮合酶(NOS)的改变,探讨亚低温对缺血脑组织的保护机制。方法将45只Wistar大鼠随机分为9组,假手术组5只,缺血组及亚低温组又根据缺血、亚低温时间不同分为:3 h2、4 h4、8 h7、2 h亚组(各组均为5只)。采用颈内动脉线栓法制备大鼠大脑中动脉闭塞(MCAO)模型。结果比较缺血组和亚低温组,可见亚低温组栓塞侧脑组织超氧化物歧化酶(SOD)的生成和释放明显增加;亚低温组血清中一氧化氮(NO ...
林淑香 +3 more
doaj
ABSTRACT Improving the efficiency and stability of oxygen evolution electrocatalysts remains essential for advancing water splitting technologies. Although in situ surface reconstruction into active phases is desirable, it often leads to uncontrolled structural degradation.
Beirong Ye +11 more
wiley +1 more source
利用阻抗方法观察低氧对血液细胞介电性能的影响,将实验动物分成平原对照组和模拟低氧组,采用Agilent 4294A阻抗分析仪测量小鼠血液细胞交流阻抗,通过细胞介电谱、Cole-Cole图、介电损耗因子频谱、损耗角正切频谱以及Cole-Cole方程的曲线拟合分析,得到如下结果:(1)小鼠模拟海拔5 km低氧4周后,模拟高原组的低频介电常数ε1和介电增量Δε较平原对照组分别增加57%和59%.
ZHANGHong-bo(张红波) +2 more
doaj +1 more source
ABSTRACT Lithium‐rich manganese‐based cathodes (LRM) deliver high discharge capacities beyond 250 mAh g−1, but their practical deployment is restricted by irreversible oxygen redox, structural reconstruction, sluggish kinetics and unstable cathode‐electrolyte interfaces (CEI). Here, we develop a colloid‐assisted anchoring‐diffusion engineering strategy
Jia‐Nan Hao +13 more
wiley +1 more source
ABSTRACT Developing rapid, precise gas sensors for Listeria monocytogenes (LM) biomarker detection faces challenges due to suboptimal gas‐solid interactions. Herein, we report the rational synthesis of amino‐functionalized mesoporous SiO2 hollow nano‐doughnuts (MS‐2‐NH2‐2) via modification with (3‐aminopropyl) trimethoxysilane (AAPTMS), which enables ...
Xingyu Wang +7 more
wiley +1 more source
ABSTRACT Balancing low iridium dosage and robust anodic stability remains a critical hurdle for practical proton exchange membrane water electrolysis (PEMWE). Although IrRuOx offers a cost‐effective alternative, current systems still suffer from the dual dilemma of excessive noble‐metal reliance and inadequate long‐term durability. Herein, we developed
Hang‐Xing Ren +10 more
wiley +1 more source
HIF-1α、ET-1和ADM在低压低氧性肺动脉高压大鼠肺血管的表达及意义
目的模拟6,000米海拔高度,建立低压低氧性肺动脉高压(HPH)大鼠模型,研究HPH大鼠肺组织中低氧诱导因子-1α(HIF-1α)、内皮素-1(ET-1)和肾上腺髓质素(ADM)的表达及其变化规律。方法将120只SD大鼠随机分为五组,模拟6 000米海拔大气压和氧分压,分别进行低压低氧暴露4天、7天、10天、14天和21天处理,同时设相应时间点对照组(对照组所处海拔为900米),低压低氧暴露时间为24小时/天。于计划的暴露终点采集各组大鼠肺组织标本,HE染色后观察大鼠肺组织的病理学变化 ...
徐娇阳 +6 more
doaj

