Results 71 to 80 of about 24,580 (225)
Zhongguo shiyan zhenduanxue, 2007 目的初步探讨中国汉族人群Kir6.2基因E23K多态性与冠心病（CHD）的关系。方法提取119例CHD患者和101例对照者的基因组DNA,采用PCR-限制性位点多态性（PCR-RSP）方法检测Kir6.2基因E23K多态性分布特点,同时检测各项血脂水平。结果湖北地区汉族人群中普遍存在该位点的基因多态性,在冠心病组中,G等位基因频率高于正常组（63.4%vs.56.9%,P>0.05）;A等位基因频率低于正常组（36.6%vs.43.1%,P>0.05）,两组间等位基因频率无显著性差异（P>0.05 ...
鲁敏翔
doaj
The study about the association of miRNA1269a SNP and the susceptibility to hepatocellular carcinoma [PDF]
, 2016 研究背景及目的： 基于早期肝癌患者缺乏特异症状和体征，而中晚期肝癌患者治疗效率又比较低并且预后较差，探讨肝癌的早期诊断与其发生机制具有重要意义。miRNA是一类由内源基因编码的长度约为22个核苷酸的非编码单链RNA分子，它们在动植物中参与转录后基因表达调控，其形成过程从长链pri-miRNAs到pre-miRNAs，最后形成成熟miRNAs，可直接结合到mRNA的3’UTR，从而抑制mRNA的翻译，导致mRNA的降解，进而影响蛋白质的表达，改变生物过程 ...
闵培
core
Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source
MDR1基因+3435C/T基因型单核苷酸多态性对硼替佐咪治疗的多发性骨髓瘤预后的影响
Zhongguo shiyan zhenduanxue, 2013 目的探讨MDR1基因+3435C/T的单核苷酸多态性对硼替佐咪治疗的多发性骨髓瘤患者预后的影响。方法采用DNA测序方法检测MDR1基因+3435C/T的单核苷酸多态性;应用Kaplan-Meier来确认MDR1基因+3435C/T的单核苷酸多态性对硼替佐咪治疗/未治疗患者生存率的影响。结果 52.8%（n=47）的多发性骨髓瘤患者MDR1+3435位点的基因型为C/T,其余多发性骨髓瘤患者MDR1+3435位点的基因型均为T/T。MDR1+3435C/T基因型的患者的平均生存期为43.3月,而MDR1 ...
张伟, 董理
doaj
miR-378初始体rs1076064多态性与中国汉族人群乳腺癌的关联研究
Zhongguo shiyan zhenduanxue, 2020 目的探讨miR-378初始体rs1076064多态性与中国汉族女性乳腺癌发病的关联。方法运用二代测序技术分析miR-378初始体rs1076064多态性在乳腺癌(n=133)和健康对照人群(n=216)中的分布频率;运用SPSS25.0统计软件包处理数据。结果在共显性、显性和隐性遗传模型中,rs1076064多态性与乳腺癌发病无相关性(TC与TT相比,OR=1.15,95%CI:0.67-1.95;CC与TT相比,OR=1.35,95%CI:0.73-2.52;TC/CC与TT相比,OR=1.21,95%
赵敏君 +7 more
doaj
, 2012 大头鲤(Cyprinus pellegrini)是一种云南高原湖泊特有的国家Ⅱ级重点保护鱼类。土著种大头鲤与外来种鲤(C.carpio)的渐渗杂交在星云湖野生种群中已经广泛发生。本研究结合形态和微卫星及线粒体DNA分析检测了螺蛳铺大头鲤原种种群的遗传现状。结果显示,螺蛳铺大头鲤样本所有个体在形态上位于大头鲤与鲤的参照样本之间;在微卫星因子对应分析中也显示,其位于大头鲤与鲤的参照样本之间,但与大头鲤参照样本较为相似;在线粒体DNA分析中显示,都具有鲤的单倍型 ...
唐卫星, 陈毅峰
core
Representation of obligate groundwater‐dwelling copepod diversity in European protected areas
Conservation Biology, EarlyView.Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli +7 more
wiley +1 more source
糖尿病、冠心病患者ABCA1基因R219K多态性的频率分布特点
Zhongguo shiyan zhenduanxue, 2011 目的旨在探讨我国北方地区汉族人ABCA1基因R219K多态性的频率分布特点,对血脂水平的影响,及其与冠心病、糖尿病和糖尿病合并冠心病的关系。方法采用改良碘化钠法提取基因组DNA,聚合酶链反应限制性片段长度多态性（PCR-RFLP）法分析ABCA1基因R219K多态性。结果正常对照组ABCA1基因R219K多态性RR、RK、KK基因型频率、R等位基因频率、K等位基因频率分别为28.5%、48.6%、22.9%、52.8%、47.2%;糖尿病组分别为29.6%、63.9%、6.5%、61.5%、38.5 ...
许慧, 彭浩, 蒋莹
doaj
Conservation Biology, EarlyView.Abstract In the western United States, conservation practitioners are increasingly working with private landowners to restore habitat for North American beavers (Castor canadensis) and to use nonlethal mitigation techniques when beavers damage crops and infrastructure.
Brian D. Erickson, Megan S. Jones
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2012 目的采用高分辨熔解曲线（high-resolution melting,HRM）方法检测7个2型糖尿病（T2DM）患者相关易感单核苷酸多态性,并分析该多态性与2型糖尿病的相关性。方法选取202名T2DM患者和200名健康志愿者,提取外周血DNA,采用HRM技术分析其多态性,并用测序法证实。结果成功地检测T2DM患者相关易感单核苷酸多态性。HRM技术检测能准确区分各种基因型,其结果与测序法一致;研究还显示rs10811661和rs10923931位点在本研究人群中与T2DM无相关 ...
左玲, 左磊
doaj