Results 21 to 30 of about 19,323 (198)
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT High‐entropy alloys (HEAs) have emerged as a transformative class of materials distinguished by their complex chemical compositions, unique microstructures, and remarkable mechanical and functional properties. Traditionally, the discovery and optimization of HEAs have relied on conventional methods, including trial‐and‐error experimentation ...
Chrispin Ouko Zamzu +2 more
wiley +1 more source
Zhongguo shuxue zazhi, 2022 目的 探讨导致3例ABO血型正反定型不符的分子机制。方法 采用血型血清学方法对ABO正反定型不符标本进行亚型鉴定；采用PCR方法扩增ABO基因的6、7外显子；采用测序方法对ABO6、7外显子进行直接测序。结果 血型血清学试验结合基因测序证实3例标本为分别为：AwB(1例)、Ael(2例)。基因直接测序发现先证者1在A等位基因第7外显子发生了476C>T、595C>T突变，在B等位基因第7外显子526C>G、657C>T、703G>A、796C>A、803G>C、930G>A突变；先证者2 ...
Yishen LI, Yurong LI, Wenju ZHANG
doaj +1 more source
The new electrochemical DNA sensor for detection of Mycobacterium tuberculosis and its drug resistance gene [PDF]
, 2016 耐药结核分枝杆菌，尤其是耐多药结核分枝杆菌的出现给结核病的检测和治疗带来了巨大的挑战，对人类健康产生了极大威胁。目前临床上常用的结核病的检测方法分别存在操作繁琐、仪器昂贵、耗时较长及易污染等不足。电化学DNA传感器是近几年发展起来的一种新型生物传感器，因其简单、灵敏、特异性强、易微型化等特点受到研究者的青睐，已被应用于多个领域的研究。然而电化学DNA传感器易受其他因素的干扰造成结果不稳定。实验前期构建的BSA单分子层控制组装界面为基础的电化学DNA传感器，有效地提高了体系的稳定性。本文在前期研究基础上 ...
李茜茜
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Risk, Hazards &Crisis in Public Policy, Volume 16, Issue 4, December 2025.ABSTRACT Background Hazardous levels of contaminants produced by anthropogenic activities are increasingly pervading residential environs and urban areas. Hazardous contamination can pose significant health risks for citizens dwelling in exposure pathways.
Rosina Johnson +3 more
wiley +1 more source
The research of the detection of thalassaemia multiple mutations by next-generation sequencing technology [PDF]
, 2015 地中海贫血又称珠蛋白生成障碍性贫血，早期的病例来自地中海地区，故称为地中海贫血，是世界范围内影响最大的单基因病之一，遵循孟德尔遗传定律。该病是由珠蛋白基因的缺失或点突变所致，根据其变异的肽链可分为α地贫和β地贫。由于其基因缺陷的复杂、多样，使缺乏的珠蛋白链类型、数量、临床症状变异较大。临床上对中、重度地中海贫血无行之有效的治疗方法，给社会、家庭、个人带来了沉重的经济及精神负担。故有效检出地中海贫血患者、进行婚前孕前指导、产前诊断、避免地中海贫血患儿的出生，有着极其重要的社会意义 ...
成明
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People and Nature, Volume 7, Issue 7, Page 1749-1768, July 2025.Abstract Social‐ecological systems (SES) are coupled systems formed by the intricate interactions between humans and nature. Our movement towards sustainable lifestyles requires a robust understanding of these interactions. Achieving a sustainable win‐win situation for both social and ecological systems, therefore, necessitates a sound scientific ...
Na Sa +6 more
wiley +1 more source
The fMRI study of the hypothalamus function in the patients with pituitary adenoma before and after operation [PDF]
, 2015 目的：利用静息态功能磁共振影像记录技术，以垂体腺瘤患者手术前后的下丘脑区为研究对象，探讨下丘脑区功能变化与垂体腺瘤的相关性。 方法：连续性收集自2013年1月至2014年2月来我院神经外科就诊的剔除不符合标准后的78例垂体腺瘤患者进行本课题研究。纳入标准：①具有完整的诊疗记录，包括术前、术后MRI（含fMRI）检查，术前及术后1天、3天、7天、1个月、6个月的激素检测，术中完整手术录像、手术记录、日常病程记录及护理记录；②术后经过病理学（免疫组织化学法）检测后确定为垂体腺瘤的患者；排除标准 ...
肖勇
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New Phytologist, Volume 247, Issue 2, Page 504-517, July 2025.Summary Repetitive DNA is a feature of all organisms, ranging from archaea and plants to humans. DNA repeats can be seen both in coding and in noncoding regions of the genome. Due to the recurring nature of the sequences, simple DNA repeats tend to be more prone to errors during replication and repair, resulting in variability in their unit length ...
Sridevi Sureshkumar +3 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2010 目的探讨大肠肿瘤p53和ki-ras基因协同突变的临床意义。方法采用免疫组化和PCR-SSCP方法,检测58例大肠肿瘤患者的良性病变、良性病变转为恶变、原发腺癌组织的p53基因、ki-ras基因的表达和突变情况。结果良性病变组与恶变组间的p53基因和Ki-ras基因的表达有显著差异,良性病变组与原发腺癌组的Ki-ras基因表达差异显著;良性病变组的p53基因与Ki-ras基因的表达呈负相关,而恶变组和原发腺癌组呈正相关。p53基因和ki-ras基因两种基因突变率无显著差异,而协同突变与淋巴结转移密切相关,
侯睿哲 +3 more
doaj
Constructhion and Eukaryotic Expression of FBXW7α and Effects On Migrationof Cholangiocarcinoma Cell [PDF]
, 2015 胆管癌是起源于胆管上皮的一种恶性肿瘤，近年来在全球的发病率逐年升 高，目前占据消化道肿瘤的3%,胆管癌患者5年生存率不足5%；并且这一状况 30年未曾改变。由于起病隐匿，发现比较困难，手术效果并不理想；为此我们 寄希望于采取新一代的基因诊断提高发现率；有人对人类多种肿瘤做了基因突变 测定，发现FBXW7在胆管癌中突变率较高。FBXW7有三种亚型，分别为FBXW7 α、FBXW7β和FBXW7γ；FBXW7α含有一个F-box基序，该基序直接与Skp 蛋白结合构成完整的SCF(Skp-cullin-F ...
翁中海
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