Results 31 to 40 of about 183,892 (152)
Accessing Ultra‐Nano Phase‐Separated Metallic Glasses via Cryogenic Cycling
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Phase separation offers a promising avenue to mitigate the inherent brittleness of metallic glasses. However, traditional approaches relying on mixing enthalpy face significant challenges, primarily due to the detrimental impact on glass‐forming ability.
Huaping Ding +15 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Platinum‐based electrocatalysts are fundamentally constrained by strong oxygen binding, which restricts the oxygen reduction reaction (ORR) kinetics, and by severe CO poisoning, which hinders the methanol oxidation reaction (MOR). To address these limitations, we synthesized PdPtRuIrRhNi high‐entropy alloy (HEA) mesoporous nanotubes that ...
Hong Pan +6 more
wiley +1 more source
, 1999 基于简单的细观非线性动力学模型，采用相空间随机切片方法，考察了介质损伤破坏的耦合斑图非平衡系统演化。系统的行为呈现样本个性、跨尺度敏感性及突发性灾变等特征，称之演化诱致突变现象。通过系综演化模拟，得到了相应的统计分布。考察了宏观参数空间中过渡区范围的尺度效应 ...
白以龙, 白洁, 柯孚久, 夏蒙棼
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Zhongshan Daxue xuebao. Yixue kexue ban, 2001 【目的】检测中国人粘多糖贮积症Ⅰ 型患者IDUA 基因(IDU A )突变。【方法】采用PCR-SSCP 、PCR 产物直接 测序等技术对35 例粘多糖贮积症Ⅰ 型患者的IDUA 第2 、6 、7 、8、9 和10 外显子及其相邻区域进行突变筛查。【结果】本研究 筛查出7 种突变, 均为单碱基置换。一内含子区突变nt1486C※T ;一中性突变nt1945G※C ;1 种无义突变E404X;4 种错义突 变:F198L、L218V、A361T 和V454I 。【结论】中国人IDUA 在第2 、6 ...
于洪枫, 曾瑞萍, 林群娣
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Concurrent Crises and Non‐State Service Provision
Risk, Hazards &Crisis in Public Policy, Volume 17, Issue 3, September 2026.ABSTRACT Concurrent crises represent a significant challenge for disaster and public health governance. Activated in response to one threat, governing institutions may be distracted or stretched thin during an emergent crisis. In such crises, governments and communities rely heavily on non‐state service providers such as non‐profit organizations and ...
Daniel Sledge, Herschel F. Thomas
wiley +1 more source
, 2012 编者按：力学研究所以白以龙院士为首的研究团队多年来对演化诱致灾变问题进行了系统而深入的探讨，先后发表过一系列研究成果，例如：《材料的不稳定性》(1995)，《固体的破坏》(1998)，《固体损伤的演化诱致突变和预测》(1999)，《内禀Deborah数在破坏现象中的意义》(2004)和《细观强度非均匀性导致的破坏的非通常行为》(2009)，等等。这些研究深入分析了材料损伤破坏的机制，并对自然灾害(如地震)和重大工程安全(如水坝)的预测预报具有重要意义。征得白以龙院士的同意，本刊在此选登 ...
白以龙, 柯孚久, 夏蒙棼
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Zhongguo shiyan zhenduanxue, 2017 目的分析吉林省耐多药结核分枝杆菌临床分离株rpoB、katG基因突变特点,为建立本省快速耐多药检测方法提供参考。方法对吉林省耐多药结核分枝杆菌菌株扩增rpoB、katG基因测序后比对分析。结果耐多药结核分枝杆菌rpoB、katG基因的突变率分别为83.53%和70.6%,突变类型包括点突变、联合突变和缺失。在rpoB基因中,82.30%突变发生在RRDR区域,最常见突变位点为rpoB 531、rpoB 526、rpoB 516。KatG基因突变率为70.6%,最常见突变位点为katG315 ...
张炜煜 +4 more
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World Medical &Health Policy, Volume 18, Issue 3, September 2026.ABSTRACT Confrontational violence still puts catastrophic burdens on children, with 2024 being the highest recorded levels of displacement, malnutrition, injury, and deprivation in contemporary humanitarian history. Children's surgical care is still grossly underrepresented in health responses worldwide in the prevention of avoidable deaths and long ...
Gaurav Chanderprakash Mittal +4 more
wiley +1 more source
Functional Ecology, Volume 40, Issue 9, Page 2843-2860, September 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Drylands are mainly structured by both vascular plants and biological soil crusts (biocrusts), the latter often regarded as a self‐organizing component of these ecosystems.
Haoran Luo +13 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2011 目的探讨K-ras基因突变谱与结直肠癌肝转移的相关性,为进一步阐明结直肠癌肝转移的分子机制提供理论依据。方法收集2008年1月至2010年8月在我院治疗的结直肠癌肝转移患者30例,进行K-ras基因突变检测,分析K-ras基因的突变类型及频率,探讨K-ras基因的突变谱与结直肠癌肝转移患者性别、年龄、原发灶位置、转移位置、病灶形态及TNM分期的相关性。结果 30例结直肠癌肝转移患者组织中K-ras基因突变者14例,突变率为47%,其中12密码子突变9例,突变率为30%;13密码子突变者5例,突变率为17%
王涛 +4 more
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