Results 51 to 60 of about 940,388 (200)
Atom Probe Tomography‐Based Analysis of Residual Trace Elements in Advanced Metallic Materials
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Residual trace elements inherited from raw materials strongly influence the mechanical and environmental performance of advanced metallic alloys and recycling materials due to preferable boundary/interface segregation and resultant embrittlement effects, yet their parts per million level concentrations pose significant challenges to ...
Congcong Li +17 more
wiley +1 more source
转pMThGH基因红鲤F_4代鱼体内转植基因存在的分子多态性
, 2000 从一尾转ｐＭＴｈＧＨ基因红鲤Ｆ４代仔鱼基因组内回收并克隆了５０个转植基因（ｔｒａｎｓｇｅｎｅ），对其中３３个进行了分析．根据双酶切结果，可将这些回收基因分为４种类型．用５种内切酶构建了这 ４种类型回收基因的限制性内切酶图谱，第 １种类型（６个，占 １８％）与建立原代转基因鱼所用的外源基因相同，而其他３种类型回收基因的分子量大小、酶切位点的种类、数量、位置都迥异于转移前的结构，意味着大多数转植基因顺序发生了缺失和重排．Ｓｏｕｔｈｅｒｎ杂交进一步证明了这一结果．对回收基因侧翼进行顺序分析 ...
曾志强,朱作言
core
Intelligent Material Framework for Data Mining and Performance Prediction of Invar Alloy
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Invar alloys exhibit a low coefficient of thermal expansion (CTE) over a wide temperature range and are regarded as critical materials for precision engineering and aerospace applications. In this work, an integrated OLR‐IMF (an intelligent material framework based on optical character recognition [OCR], large language models [LLMs], and ...
Tongbo Jiang +11 more
wiley +1 more source
, 2017 小麦是全球食用人数最多、种植范围最广的重要粮食作物，被称为“世界性的粮食”。穗发芽( Pre- harvest sprouting，简称 PHS) 指小麦收获前遇到阴雨天气或潮湿环境下籽粒在穗上发芽的现象，是一种世界性的农业气候灾害。穗发芽是受遗传基因控制和环境因素影响的复杂数量性状。籽粒休眠特性与穗发芽密切相关，是影响小麦穗发芽抗性的主要遗传因素。国内外学者利用不同的遗传分析群体在多个染色体上鉴定了控制小麦籽粒休眠或穗发芽抗性的多个 QTL位点，并建立了与基因位点连锁的分子标记。近年来的研究表明 ...
王威
core
Kinetic‐Controlled Growth of Iron Chalcogenide Nanosheets Featuring Besnus Transition
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Two‐dimensional (2D) Fe‐based nanosheets have sparked wide attention owing to exotic magnetism, superconductivity and topological phases. However, the synthesis of 2D FemXn (X = Te/Se/S, m, n: integer), typically in a non‐stoichiometric ratio, remains challenging because of narrow thermodynamic windows.
Hongmei Zhang +11 more
wiley +1 more source
, 2012 针对全氟化合物这类新型的有机污染物,在环境中具有持久性,生物累积性和毒性的问题,以全氟辛酸为模型化合物,以真核生物酵母以及4基因缺失型酵母突变体和5基因缺失型酵母突变体为模式生物,开发便捷、灵敏的毒理学评价方法,探究全氟辛酸对不同基因缺失型酵母的毒性效应,以期建立以酵母为平台的环境污染物快速筛选系统.研究结果表明,5基因缺失型酵母突变体对全氟辛酸较为敏感 ...
程巧红, 戴和平, 金士威
core
, 2009 文章对维吾尔族的JC病毒IG区域基因型的地理分布状况进行了对比研究。从103个40岁以上的男性尿样提供者中分离出了JC病毒,并且对它们进行了DNA提取,对JC病毒IG区域进行了PCR扩增和DNA序列测定,得到了73人的JC病毒DNA IG区域的碱基序列。多态分析研究结果表明,73人中的基因型分别由B1-a,B1-b,B1-c,CY和EU组成,各基因型所占比率为:4.1%,58.9%,8.2%,21.9%和2.7%。研究发现,在各基因型中B1-b型和CY型所占的比率高 ...
艾山江·阿布都拉 +2 more
core
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Bone restoration is often hindered by the spatiotemporal dysregulation of immune and regenerative signals. Conventional bio‐inert implants, providing only passive support, fail to modulate this microenvironment, leading to infections and poor healing.
Zhizhong Sun +8 more
wiley +1 more source
血管紧张素转换酶基因插入 / 缺失多态性与 PAI-1 活性的相关性
Zhongshan Daxue xuebao. Yixue kexue ban, 2004 【目的】研究血管紧张素转换酶(ACE)基因插入/缺失(ID)多态性与血浆PAI-1活性的关系。【方法】用PCR方法扩增93例心肌梗死患者及87例健康体检者ACE基因特异性片段,同时应用发色底物法测定PAI-1活性。【结果】①心肌梗死组ACEDD基因型频率32.3%和D等位基因频率54.3%,高于对照组12.6%和37.4 ...
doaj
[COL4A5 genotypes and clinical characteristics of children with Alport syndrome]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2023 Huang W +7 more
europepmc +1 more source