Results 11 to 20 of about 1,793,633 (116)
The Structural Origin of the Amorphous‐to‐Crystalline Transformation in Cu‐Zr Based Amorphous Alloy
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Amorphous alloys (AAs) possess a metastable structure from a thermodynamic perspective and tend to crystallize under external conditions, which in turn alters their material properties. To gain an in‐depth understanding of their crystallization mechanism, this study employed in situ spherical aberration‐corrected transmission electron ...
Yajie Huang +4 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Bismuth anode materials are considered promising anode candidates for sodium–ion batteries (SIBs) due to their high theoretical capacity and appropriate working potential. Nevertheless, the significant volume expansion that occurs during the cycling process restricts its broader application in sodium–ion storage. Herein, Bi/Bi2O3 nanoparticles
Jiaju Lu +3 more
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Shuitu Baochi Xuebao, 2017 探讨樟子松人工林林下土壤粒度特征随林分密度的变化及影响，以期为毛乌素沙地以樟子松为建群种的植物固沙模式提供理论依据。以陕西省榆林市珍稀沙生植物保护基地内8个密度梯度（925～2 700 株/hm2）的沙地樟子松人工林为研究对象，分别采集0—20，20—40 cm 2层土壤样本，测定土壤粒度组成，计算分析平均粒径、标准偏差、偏度、峰态值和分形维数。结果表明：研究区各层土壤粒度组成以砂粒为主，其次是粉粒、黏粒；粒度特征整体呈现粒径较粗、分选较差、偏态正和峰态为中至窄的特点，土壤分形维数分布于1.422～2 ...
马成忠, 丁国栋
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Zirconium dioxide (ZrO2) thin films are critical materials owing to their thermal stability, mechanical durability, and optical transparency enabling applications in photonic, sensing, and electronic devices. However, achieving uniform deposition via plasma‐enhanced chemical vapor deposition (PE‐CVD) has remained challenging due to poor ...
Nour Manafikhi +4 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2011 目的探讨胃癌组织端粒酶活性表达与其临床病理特征的关系。方法应用端粒酶重复序列扩增（telom-eric repeat amplification protocol,TRAP）银染TRAP-ELISA方法检测25例胃癌组织（实验组）和25例胃不典型增生组织（对照组1）及正常胃组织（对照组Ⅱ）中端粒酶活性的表达,并胃癌组织与临床病理分期、病理分级及预后关系进行分析。结果实验组中端粒酶活性表达率为91.1%,对照组Ⅰ端粒酶活性表达率为20%,对照组Ⅱ无表达,实验组端粒酶活性高于两对照组 ...
刘国辉 +3 more
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Conservation Biology, Volume 40, Issue 2, April 2026.Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva +9 more
wiley +1 more source
四川大学学报. 自然科学版, 1999 利用启动子探针型质粒ｐＫＫ２３２－８从卡介苗染色体ＤＡＮ的ＢａｍＨＩ酶切片段中克隆到４个具启动功能的ＤＮＡ片段，测定各重组子对氯霉素（Ｃｍ）的抗性，其中含３．３Ｋｂ外源片段的重组质粒ｐＢＣＧ２大肠杆菌转化子在ＬＭ培养基上对Ｃｍ抗性可达１７０×１０－６ｇ／ｍＬ，作了该片段的限制性酶切图谱．对ｐＢＣＧ２利用ＳａｌⅠ位点，亚克隆出４种部分重叠的具启动功能的ＤＮＡ片段，这４种重组质粒分别命名为ｐＢＣＧ２－１，ｐＢＣＧ２－２，ｐＢＣＧ２－６和ｐＢＣＧ２－８，并分析了其中插入片段的大小及其转化子对Ｃｍ的抗性 ...
冯云, 沈斌, 邱薇, 徐恒
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Zhendong Ceshi yu Zhenduan针对离心式空调冷水机组的振动噪声问题，采用粒子阻尼技术进行减振降噪研究。首先，对振动特性进行分析，了解机组各结构振动情况以及振动传递路径；其次，建立有限元模型进行动力学分析，对空调机组进行模态分析，研究机组的振动敏感点，获得粒子阻尼器的最佳安装位置；然后，基于离散元法，设计冷水机组粒子阻尼器，比较最优粒子材质、粒径以及阻尼器不同布置方案的耗能值，得到最佳配置方案；最后，搭建实验台对所提方案进行验证。结果表明：冷水机组在386 Hz下，采用阻尼器最优方案时，压缩机机脚振动减少了4.89 dB ...
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转录因子Foxp3对RAW264.7细胞表型及免疫抑制相关基因的影响
Zhongguo shiyan zhenduanxue, 2013 目的应用过表达转录因子Foxp3的小鼠巨噬细胞RAW264.7细胞模型,探讨转录因子Foxp3对RAW264.7细胞表型及免疫抑制相关基因的影响,从而为移植排斥提供新的细胞治疗措施奠定基础。方法采用脂质体转染重组质粒pIRES2-EGFP/mFoxp3及空载质粒pIRES2-EGFP至小鼠巨噬细胞RAW264.7细胞系,经G418筛选后,免疫荧光显微镜及流式细胞术检测GFP表达、RT-PCR检测Foxp3表达以鉴定表达效果;采用RT-PCR检测转染重组质粒pIRES2-EGFP/mFoxp3 ...
张英林 +4 more
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