Results 11 to 20 of about 39,013 (172)

Assessing limits of sustainable seed harvest in wild plant populations. [PDF]

Conserv Biol
Abstract Seed harvesting from wild plant populations is key for ecological restoration, but it may threaten the persistence of the source populations. Consequently, several countries have set guidelines limiting the proportions of harvestable seeds. However, these guidelines are inconsistent and lack a solid empirical basis.
Bucharova A, Bossdorf O, Scheepens JF, Salguero-Gómez R.   +3 more
europepmc   +2 more sources

Surface Sulfate Modification Promoted Excitons Extraction of BiOBr Nanosheets for Efficient 1O2 Photosynthesis and Chlorophenols Dechlorination

Rare Metals, EarlyView.
ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi, Zhi‐Ping Yang, Chen‐Chen Zhang, Pin‐Ji Chen, Hao‐Yang Fu, Xu‐Peng Liu, Hao Li, Bo Lai, Li‐Zhi Zhang   +8 more
wiley   +1 more source

Bidentate Coordination by Graphene Oxide‐Enhanced γ‐Cyclodextrin for Synergistic Solvation and Stabilization of the Zn Anode

Rare Metals, EarlyView.
ABSTRACT With the rapid development of the energy storage industry, aqueous zinc‐ion batteries (AZIBs) have attracted considerable attention in the field of energy storage because of their inherent advantages, thereby emerging as a promising research direction with significant potential.
Lingjiao Fu, Bingxin Sun, Chendi Shi, Tianyu Chen, Guowang Diao, Fangfei Liu, Liwei Lin, Yuanzhe Piao, Wang Zhang   +8 more
wiley   +1 more source

Gravity‐Driven Inclination Sensor Based on Liquid Metal Interface Migration in Anisotropic Microchannels for Information Transmission and Continuous Surface Topography Scanning

Rare Metals, EarlyView.
ABSTRACT With the continuous advancement of materials science and technology, the rare metal gallium has increasingly emerged as a promising alternative to the toxic metal mercury. Although existing research has predominantly focused on the high electrical conductivity and excellent deformability of liquid metal (LM), its intrinsic fluidic property ...
Feifan Guo, Fei Zhan, Guoqing Wang, Xuedong Qiang, Min Mao, Hongbin Zhao, Lei Wang   +6 more
wiley   +1 more source

Selective Lithium Deposition Through 3D Copper Collector With Lithiophilic Alloy “Skins” and Curvature Boundaries for Dendrite‐Free Lithium‐Metal Anodes

Rare Metals, EarlyView.
ABSTRACT Although lithium metal has been regarded as an ideal anode material for high‐energy‐density batteries, its practical applications remain hindered by many serious challenges. Three‐dimensional (3D) porous Cu current collectors demonstrate potential in ensuring uniform Li deposition.
Meng‐Qi Zhu, Dong‐Xu Ye, Xiao‐Yi Teng, Yi‐Xin Wei, Jin‐Hao Zhu, Xiao‐Man Liao, Jin‐Yan Zhong, Jin‐Dan Zhang   +7 more
wiley   +1 more source

Oxygen Vacancy Engineering of Ultrafine ZnAl2O4 Nanoparticles as a Robust Protective Layer for Dendrite‐Free and Long‐Lifespan Aqueous Zn Metal Anodes

Rare Metals, EarlyView.
ABSTRACT Aqueous zinc‐ion batteries (AZIBs) hold great promise for safe and sustainable energy storage, but their commercialization is impeded by severe Zn dendrite growth and interfacial instability. To address these challenges, we propose a defect engineering strategy employing ultrafine ZnAl2O4 (ZAO) nanoparticles (∼5 nm) with oxygen vacancy defects
Yilun Ren, Haifeng Bian, Qing Zhou, Biao Wang, Hao Wu, Chunrong Zhao, Bing Yu, Rong Yang, Jiantao Wang, Xiangkang Meng   +9 more
wiley   +1 more source

Regulating TGO Nucleation and Growth of MCrAlX Coatings via Femtosecond Laser Remelting: The Role of Reactive Elements in the Oxidation Resistance

Rare Metals, EarlyView.
ABSTRACT MCrAlX coatings are widely used as bond coats in thermal barrier coating systems to protect turbine blades from high‐temperature oxidation. However, their oxidation resistance is often restricted by uncontrolled microstructures, surface roughness, and aggregation of reactive elements (REs). In this study, high‐repetition‐rate femtosecond laser
Wei Qian, Xiangcheng Li, Yinqun Hua, Xiaofeng Zhang, Yong Feng, Xiaonan Wang, Szymon Tofil, Jie Cai   +7 more
wiley   +1 more source

Exploring the Possibilities of Care Prevention by Acupuncture Therapists [PDF]

, 2020
近年、鍼施術による痛みや運動器の傷害に対する有効性が認められている。鍼施術は補完代替医療に位置付けられているが、近代西洋医学に統合した治療的介入も試みられている。超高齢社会において、予防医学や介護予防の領域が一層重視されてくると思われる。本稿の目的は、介護予防領域での鍼灸師の取り組みに焦点をあて、これまでに報告されている文献を通して、鍼灸師による介護予防の取り組みの現状と可能性について検討することである。医学中央雑誌、科学技術情報発信・流通総合システム（J-STAGE）、メディカルオンライン ...
Yoshino Ryoko, 吉野 亮子
core   +1 more source

光纤的机械可靠性及寿命评估

Guangtongxin yanjiu, 2016
为了探究延长光纤机械寿命的关键技术,研究了光纤机械可靠性及寿命评估模型。影响光纤机械寿命的主要因素是光纤裂纹生成和光纤裂纹在应力腐蚀下不断生长。根据光纤机械强度计算公式以及光纤疲劳试验的威布尔分布特性,建立光纤筛选实验寿命评估模型。运用该寿命评估模型对OPGW（光纤复合架空地线）线路寿命进行模拟计算和评估,探究了延长OPGW线路寿命的关键技术。结果表明,提高光纤疲劳参数和降低光纤使用时的应力水平,均可显著提高光纤寿命。
陈黎明, 刘骋, 侯继勇, 冯学斌
doaj  

On the Presumption of the Life of the Fluorescent Lamp by the V_l-I_l Characteristics [PDF]

, 1959
Considering the effects of the surrounding temperature, frequency, and interterminal capacitor, I have reported about the presumtion of the absolute life of the fluorescent lamp by the measurements of the V_l-I_l characteristics.蛍光灯の寿命推定に関しては ...
中谷 秀夫
core   +1 more source