Results 31 to 40 of about 14,720 (193)
Novel Non‐Equimolar High‐Entropy Zirconates With Superior Thermophysical Properties
Rare Metals, EarlyView.ABSTRACT Rare‐earth zirconates (RE2Zr2O7) are promising candidates for topcoat materials in thermal barrier coatings (TBCs). However, their practical application in TBCs is limited by poor fracture toughness and low thermal expansion coefficient (TEC).
Taoyi Lu +7 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
Zhongguo shiyan zhenduanxue, 2015 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
Study on Geochemistry of Nutrient and Nutrient Criteria in Jiulong Estuary [PDF]
, 2015 由于大量的人为输入河口的营养盐（特别是氮和磷），近海富营养化区域逐渐扩大。河口和近海水体的富营养化已经引起了全世界的广泛关注。水体富营养化对环境造成很多影响，比如水质恶化、赤潮爆发、生态系统结构改变、低氧和死亡区的出现以及大量的经济损失。研究河口营养盐循环，并建立合理的营养盐基准值保护河口及沿海水体的措施刻不容缓。 本研究融合多学科知识，对不同季节的九龙江河口地区进行了多个航次的现场采样和同位素培养，运用GIS技术并收集整理历史数据，揭示了九龙江河口营养盐时空变化、内部迁移转化过程以及水体营养盐浓度 ...
黄铮
core
Rare Metals, EarlyView.ABSTRACT Developing low‐energy‐input electrocatalytic systems for efficient hydrogen production is crucial for advancing sustainable energy technologies. The overall hydrazine splitting (OHzS) has emerged as a promising strategy to reduce the overall energy consumption by replacing the sluggish oxygen evolution reaction.
Haozhou Chen +13 more
wiley +1 more source
Progress of dye-sensitized water-splitting for hydrogen production [PDF]
, 2006 The mechanism of dye-sensitized water-splitting for hydrogen production is introduced. Research works on the use of different dye molecules and redox mediators are reviewed.
Leung, MKH, Leung, YC, Ni, M
core
Rare Metals, EarlyView.ABSTRACT Converting CO2 to CH4 under mild conditions is a promising strategy for solving environmental and energy problems, but also a challenge. In this work, the low‐temperature CO2 hydrogenation process over Ni/CeO2 catalysts was significantly accelerated by optimizing the H2 dissociation ability of Ni through the size effect, thus A‐Ni/CeO2 with an
Yu Xie +8 more
wiley +1 more source
Pyruvate kinase M2 inhibits cisplatin induced caspase-dependent apoptosis via ERK-mediated signaling pathway in hepatocellular carcinoma cells [PDF]
, 2016 M2型丙酮酸激酶（pyruvatekinaseisoenzymetypeM2，PKM2）在肿瘤代谢 和生长等方面发挥重要作用。此外，PKM2还可作为蛋白激酶及辅助转录因子， 调控相关基因的转录表达，促进肿瘤细胞的增殖。我们实验室前期已经证实了 PKM2在肝细胞癌中高表达，并通过EGF/EGFR及TGFβ/TGFβR信号通路调控 肝癌细胞的迁移、侵袭。本课题研究目的在于进一步探索PKM2在肝癌细胞增 殖与凋亡方面的调控作用及相关分子生物学机制。 采用短发夹RNA转染HepG2和Huh7两株肝癌细胞株 ...
谌小春
core
Optimizing CuO on 3D Ordered Macroporous CeO2 for CO Oxidation in Rich Hydrogen
Rare Metals, EarlyView.ABSTRACT CO preferential oxidation (CO‐PROX) in rich H2 is considered a feasible strategy to solve CO poisoning for fuel cells, but obtaining good activity at low temperatures is still a challenge. Herein, three‐dimensional ordered macroporous (3DOM) CuO/CeO2 catalysts were fabricated by a templating approach, with the metal–support interaction (MSI ...
Xiaohua Chen +7 more
wiley +1 more source
Dianci bileiqi, 2020 通过改变氧化锑的含量,分析不同含量对氧化锌电阻片电位梯度、泄漏电流等性能的影响。氧化锑在烧结过程中与氧化锌可以形成尖晶石相,可以抑制氧化锌晶粒尺寸的大小,进而调整电阻片电位梯度。在传统五元配方体系中,通过改变氧化锑的增加,电阻片收缩率逐渐增大,致密度逐渐增加;掺杂适量的氧化锑可以提高电位梯度,降低泄漏电流;掺杂过量的氧化锑会降低电位梯度。
刘亚芸, 厍海波, 杨军, 刘明新
doaj
Rare Metals, EarlyView.ABSTRACT Considering the multiple challenges faced by stealth coatings in complex service environments, the development of multifunctional integrated microwave absorbing materials (MAMs) that combine efficient electromagnetic (EM) attenuation with environmental tolerance has become an urgent need. In this work, coral‐like CoNi@Void@C microparticle (MP)
Jiale Wu +8 more
wiley +1 more source