Results 21 to 30 of about 9,131 (119)
Genetic origins and climate‐induced erosion in economically important Asian walnuts
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract The global climate is undergoing unprecedented changes, posing significant threats to species persistence. However, the spatiotemporal impacts on genetic diversity remain poorly understood, hindering species conservation and management. Walnuts, generally referred to as Juglans regia and J. sigillata, are economically vital in Asia, but little
Peng‐Zhen Fan +17 more
wiley +1 more source
Optimized Copper Distribution and Enhanced Coercivity in PrO2‐Doped Sm2Co17‐Type Magnets
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT A rational design of Cu distribution is crucial for achieving optimal magnetic properties in Sm2Co17‐type magnets. In this study, nanostructured PrO2 powders were employed to induce Cu redistribution at grain boundaries while preserving the cellular microstructure. The corresponding coercivity (Hcj), remanence (Br), and maximum energy product (
Qi‐Qi Yang +5 more
wiley +1 more source
Gaoya dianqi, 2016 为了研究热老化应力对变压器绝缘纸微观结构的影响,以更准确地分析油纸绝缘机械强度和绝缘性能,文中对油浸纸试品进行加速热老化实验,获取不同老化程度的变压器绝缘纸试样。测量了绝缘纸试样的聚合度,采用扫描电镜观察绝缘纸试样的表面微观形貌,通过傅里叶变换红外光谱（FTIR）分析纤维素分子结构变化。分析结果表明,热老化对变压器绝缘纸微观纤维结构破坏显著,纤维细化,断裂增多,纤维分子结构及相关官能团数量变化明显。
王世强 +4 more
doaj
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Transition metal carbides demonstrate exceptional mechanical properties but confront a critical hardness–toughness trade‐off. Spinodal decomposition‐mediated phase separation is an effective approach to enhance mechanical properties in carbide ceramics through high‐temperature treatment.
Zhi‐Xuan Zhang +6 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2006 目的观察不同渗透压溶液中人红细胞形态和细胞膜表面细微结构的变化。方法用5%葡萄糖溶液（等渗液）,0.6%NaCl溶液（低渗液）,1.5%NaCl溶液（高渗液）分别处理人红细胞,用原子力显微镜观察人红细胞的变化。结果（1）经5%葡萄糖处理的红细胞形态正常;膜表面细微结构为孔洞,孔洞之间为条形隆起,孔洞交织排列,孔洞大小约15 nm100 nm,条形隆起宽约30 nm。（2）经0.6%NaCl溶液处理的红细胞大部分膨胀,细微结构中孔洞呈裂隙状,宽约10 nm,条形隆起粗大,宽约40 nm。（3）经1.5 ...
马亚敏 +5 more
doaj
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Introducing solid‐state phase transformations into the design of heterogeneous structures is considered an effective strategy for simultaneously optimizing both microstructure and mechanical properties. This study investigates the thermodynamic and kinetic mechanisms of the γ → α transformation in Ti48Al5Nb2Cr0.6Re0.1C alloy under different ...
Ke‐Xuan Li +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Enhancing the strength of 7000 series high‐strength Al alloys remains a critical challenge to meet the demands of increasingly demanding service environments. In this study, a novel approach is proposed for developing high‐performance Al alloys through a combination of powder mechanical alloying, powder press‐forming, rolling deformation, and ...
Peng‐Fei Ji +4 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2005 目的观察人红细胞经8种实验室常用溶液处理后的形态结构,找出利用原子力显微镜观察人红细胞的最佳溶液,探索人红细胞膜表面的细微结构。方法利用原子力显微镜观察经8种溶液处理后的人红细胞。结果从背景颗粒、红细胞的大小形态和红细胞膜表面细微结构来看,1%甲醛溶液、枸橼酸盐缓冲液、5%葡萄糖溶液及TAE溶液处理的红细胞样本背景颗粒少,红细胞大小正常（7μm8μm）、形态双凹圆盘状,红细胞膜表面细微结构清晰,可见红细胞膜表面有孔洞（15nm100nm）,孔洞之间为条形隆起（15nm100nm）,孔洞交织排列 ...
马亚敏 +5 more
doaj
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Weakening the electrostatic attraction between Mg2+ ions and H− ions in MgH2 is vital for improving the kinetic performance of MgH2 for hydrogen storage. Herein, a multivalent microenvironment is synergistically created by Mn and Mg2Ni to break the stable structure of MgH2, enabling rapid and stable de/hydrogenation performance.
Ya‐Ke Wu +7 more
wiley +1 more source