Results 71 to 80 of about 38,507 (214)
Exomic somatic variation of esophageal squamous cell carcinoma [PDF]
, 2015 目的：食管鳞状细胞癌（esophagealsquamouscellcarcinoma,ESCC）是全球常见的致死性恶性肿瘤。为进一步探讨其分子机制，我们利用全基因组外显子测序技术寻找食管鳞癌中多发的突变，包括点突变、结构变异等，并且进一步鉴定食管鳞癌中多发的单核苷酸变异（Singlenucleotidevariation,SNV）。在体细胞水平探讨食管鳞癌发生发展的分子机制。 方法：1.通过外显子测序生成并收集数据库ESCC测序数据。2.128对食管鳞癌外显子测序数据采用新一代基因序列比对方法 ...
李慧莉
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Although the use of AI technologies (e.g., chatbots and automated writing evaluations (AWE)) has gained considerable attention in language learning fields in recent years, how AI technologies have been designed and implemented in language learning education, as well as their effectiveness, is understudied.
Shen Qiao +2 more
wiley +1 more source
306例老年痴呆患者ApoE基因多态性及Hcy水平回顾性分析
Zhongguo shiyan zhenduanxue, 2019 目的探讨老年痴呆患者ApoE基因多态性及Hcy水平的分布特点及相关性。方法选取2015年8月-2018年8月协和医院神经科、内科就诊和住院的患者为研究对象,从中筛选痴呆患者306例回顾性分析ApoE基因型的分布情况及Hcy水平分布特点。结果痴呆组与对照组ApoE基因型均以ε3ε3型最为常见,其中痴呆组ε3ε4、ε4ε4两种基因型高于对照组,差异有统计学意义 ...
史玉玲
doaj
Function of SAV6 in Maintenance of Genome Integrity and Root Development in Arabidopsis [PDF]
, 2015 flap核酸内切酶FEN1（flapendonuclease1）是RAD2家族的一种能够识别特异底物结构的核酶。FEN1具有三种酶活性：flap核酸内切酶（FlapEndonuclease,FEN）活性、5’核酸外切酶（5’-Exonuclease,EXO）活性和缺口依赖的核酸内切酶（GapEndonuclease,GEN）活性，在DNA复制、修复以及维持端粒稳定性等方面发挥着重要作用。人们对FEN1在哺乳动物、酵母中的功能已经有了深入了解，但是拟南芥中尚无相关研究 ...
张益娟
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Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, EarlyView.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source
儿童血清25羟基维生素D水平及其基因多态性与哮喘的相关性研究
Zhongguo shiyan zhenduanxue, 2015 目的通过对哮喘患儿血清中血清25羟基维生素D水平及维生素D受体基因多态性分析,拟探讨25-(OH)-VD在哮喘发病中的作用。方法本院门诊随诊的40例哮喘患儿为哮喘组,健康体检的儿童40例为对照组。采用酶联免疫吸附试验检测两组患儿血清25羟基维生素D水平,采用DNA测序技术检测两组患儿VDR基因位点rs2228570、rs7975232、rs11574114、rs1544410、rs731236、rs757343有无多态性存在。结果哮喘组儿童血清25-(OH)-VD水平均低于正常对照组,差异有统计学意义 ...
赵宏霞 +3 more
doaj
The epigenetic mechanism of imprinted gene IGF2 regulated by MEN1 in hepatocellular carcinogenesis [PDF]
, 2015 原发性肝癌是肝细胞或肝内胆管上皮细胞发生的恶性肿瘤。死亡率仅次于胃癌和食道癌,其中肝细胞癌(hepatocellularcarcinoma，HCC)占原发性肝癌的90％。我们实验室围绕menin复合物调控的组蛋白甲基化与疾病发生关系开展了较系统深入的研究，证明了menin在肝细胞肝癌、非小细胞型肺癌及恶性黑色素瘤等非内分泌系统肿瘤中的重要生物学功能，阐明了menin调控组蛋白甲基化修饰的规律及机制。胰岛素样生长因子——2（insulinlikegrowthfactor2,IGF2 ...
丁丽红
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Review of Policy Research, EarlyView.ABSTRACT Public appointments shape the top‐level bureaucracy by serving as a gateway for professionals with different profiles, chosen based on different criteria. In general, the literature has been more interested in analyzing appointments based on merit or sponsorship, based on verification of loyalty to the government or technical competence ...
André Vaz Lopes +1 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2011 目的探讨我国吉林地区汉族代谢综合征及其相关表征的发生与LRP6基因R611C基因多态性的相关性。方法 194例研究对象为代谢综合征组（MS）（98例）和对照组（96例）,代谢综合征组包含血糖升高患者（>5.6 mmol/L）共58例、高血压共66例、高脂血症共62例 ...
王珺楠 +7 more
doaj
Studies on Genes Related to Copper Accumulation of the Fujian Oyster Crassostrea angulata [PDF]
, 2015 牡蛎是具有重要经济价值的海水养殖品种，在世界很多地区都有养殖。而我国牡蛎养殖产量居世界首位。同时，牡蛎对铜、锌等金属具有很强的富集能力，经常被用于指示河口污染情况。随着工业发展，近岸河口区遭受越来越严重的金属污染，铜就是其中非常有代表性的金属污染物。因此牡蛎对铜的超富集现象越来越被人们所关注。学者们发现牡蛎对铜富集存在非常大的个体差异，然而相关的研究却非常有限，特别是缺少分子机制的解析。对这一现象的深入研究不但可以探寻、丰富牡蛎铜富集相关机制，更可以为选育牡蛎不同金属富集能力品系提供理论依据 ...
史博
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