Results 31 to 40 of about 19,773 (122)
Novel Non‐Equimolar High‐Entropy Zirconates With Superior Thermophysical Properties
Rare Metals, Volume 45, Issue 2, February 2026.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
Isolation and identification of algicidal substances produced by Brevibacterium sp. BS01 and algicidal mechanism of algicidal compound against Alexandrium tamarense [PDF]
, 2012 赤潮的控制与防治对于保证海洋环境安全和海洋生态健康是至关重要的。本论文主要研究了海洋杀藻放线菌BS01的种属关系；根据BS01杀藻活性物质的基本理化性质，分离纯化得到一个具有杀藻活性的化合物；同时探讨了塔玛亚历山大藻在BS01胞外分泌物胁迫下生理生化水平的响应；考察藻细胞死亡过程中细胞形态变化；氧化压力下藻细胞光合系统损伤情况；综合运用real-timePCR技术研究了藻细胞在杀藻活性物质作用下靶功能基因psbA、psbD、hsp、cox和cob转录水平变化。主要研究结果如下： （1 ...
安新丽
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World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT This paper examines the rise and collapse of the 2021 United Arab Emirates (UAE)–Israel–Jordan Water‐for‐Energy Deal, a landmark initiative that sought to exchange Jordanian solar energy for Israeli desalinated water. Presented as a breakthrough in regional cooperation and environmental peacebuilding, the agreement was brokered under the ...
Majed Abu‐Zreig, Hussam Hussein
wiley +1 more source
, 2005 目的:半枝莲化学成分的研究。方法:利用硅胶柱层析,通过波谱分析鉴定其化学结构。结果:分离并鉴定了5个化合物:β谷甾醇(βsitosterol,Ⅰ)、对甲氧基桂皮酸(pmethoxycinnamicacid,Ⅱ)、β胡萝卜苷(βdaucosterol,Ⅲ)、scutellaricacid(Ⅳ)和scutebarbatineA(Ⅴ)。结论:化合物Ⅳ和Ⅴ结构较特别,含量较高 ...
吴凤锷, 陶曙红
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Survival, rarity, and extinction in tropical stony corals
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Many reef‐building tropical corals are becoming rare. We considered the meaning of rarity in corals and highlighted taxa that have reached low abundances in the last few decades. The difficulties of quantifying rarity in the marine environment arise from the sheer scale and 3‐dimensional nature of the biome and the inherent challenges therein ...
Bryan Wilson, Peter J. Edmunds
wiley +1 more source
Analysis of Dvl function and expression patterns of Wnt/β-catenin signaling genes in amphioxus [PDF]
, 2015 Wnt/β-catenin信号通路是后生动物中一条相对保守的信号通路，广泛参与早期胚胎体轴的建立以及多种器官的形态建成与分化。该信号通路在很多物种中都已有研究，但是在脊索动物文昌鱼中该信号通路的研究才刚刚开始，研究的内容仅包括Wnts、β-catenin、Tcf、Axin、Dkks和sFRPs基因的表达谱分析以及化学试剂处理对胚胎发育的影响，在文昌鱼中关于该信号通路中很多重要基因的功能研究尚未开始。 本文鉴定和克隆了文昌鱼Wnt/β-catenin信号通路中的Dvl（Dishevelled）基因 ...
王净
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Policy Studies Journal, Volume 54, Issue 1, February 2026.Abstract Though spillovers have been initially described in the Multiple Streams Framework (MSF), we know little about how to conceptualize and measure them. To investigate spillovers, we draw on the case of fur farming bans during the COVID‐19 pandemic. Whereas fur farming has long been criticized for its animal welfare problems, with the onset of the
Anne‐Marie Parth +3 more
wiley +1 more source
, 2010 为认识我国淡水鱼类烂鳃病的病原以及柱形病在我国的发生情况,实验从发生烂鳃病的病鱼中分离细菌性病原,经过生理生化特性分析以及是否在含托普霉素的Shieh培养基中生长并形成黄色假根状菌落,是否产生降解明胶和硫酸软骨素的酶类等特性的鉴定,并结合16SrDNA序列分析,证实柱状黄杆菌(Flavobacterium columnare)是所分离的烂鳃病的病原。同时,研究也证实20世纪曾经命名为烂鳃(Gill-rot)病病原的鱼害黏球菌(Myxococcus piscicola Lu,Nie & Ko,1975 ...
姚卫建 +7 more
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Journal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.ABSTRACT Time and chronology form the invisible architecture upon which modern civilization depends, governing synchronization across markets, power grids, communication networks, transportation, and defense. Yet, this shared temporal framework, engineered through atomic clocks, satellites, and digital synchronization, faces growing vulnerabilities ...
Bilal M. Ayyub
wiley +1 more source
System Research of a Portable Raman Spectrometer Based on Array Waveguide Grating (AWG) [PDF]
, 2016 拉曼光谱分析技术是一种非常重要的鉴定物质成分的技术，可通过分析拉曼特征光谱来检测出该物质所含有的成分。随着食品安全、环境卫生等问题的日益凸显，拉曼光谱仪利用拉曼光谱分析技术以其简便、快速等优点逐渐被应用市场认可。传统的拉曼光谱仪往往具有体积庞大、价格昂贵等缺点，不能满足现场检测的需求，这严重阻碍了拉曼技术在民生方面的推广和应用。因此，小型化、低成本、高可靠性能的便携式拉曼光谱仪有望成为一种新型的现场快速检测仪器。 如何使拉曼光谱仪的体积、成本减小并保持提高其性能是本文主要研究的工作内容 ...
冯兴兴
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