Results 71 to 80 of about 68,002 (248)
Effects of ApoE Isoforms Expression on Brain ApoE Lipidation and Amyloid-β Accumulation [PDF]
, 2015 在编码人三种不同apoE蛋白亚型（E2、E3和E4）的APOE等位基因（ε2、ε3和ε4）中，APOEε4等位基因是阿尔茨海默病（Alzheimer’sdisease，AD）最重要的遗传风险因子，APOEε2等位基因则具有保护作用。鉴于apoE蛋白亚型对基于调节apoE蛋白表达的AD治疗可能会有不同的影响，我们通过在人APOE基因定位替换（Targetedreplacement，TR）小鼠脑中过表达不同的人apoE亚型，研究脑中表达不同apoE亚型对apoE脂化和β-淀粉样蛋白（Amyloid-β，Aβ）
胡进
core
Rare Metals, EarlyView.ABSTRACT Fluxgate sensors with Co‐rich amorphous microwires, widely used for their low noise in magnetic field measurements, encounter significant challenges in high‐temperature environments such as well drilling and geological exploration. Prolonged thermal aging degrades the performance of Co‐rich amorphous microwires, resulting in increased noise ...
Lining Pan +10 more
wiley +1 more source
PGC-1α基因Gly482Ser多态性与2型糖尿病前期的相关性研究
Zhongguo shiyan zhenduanxue, 2012 目的了解云南省昆明地区PGC-1α基因Gly482Ser多态性与2型糖尿病前期的相关性。方法采集361例糖尿病前期人群（IGR）、430例2型糖尿病患者（T2DM）和446例OGTT正常的健康志愿者（NGT）的血样,提取基因组DNA。应用高分辨率熔解曲线分析方法检测PGC-1α基因Gly482Ser基因型,观察三组人群中基因型和等位基因的分布情况,同时分析糖尿病前期不同基因型人群的临床变量的差异性。结果20（1）PGC-1α基因Gly482Ser20AA基因型及G等位基因在T2DM组中的频率分别为0 ...
邓德耀 +9 more
doaj
Brd4-P-TEFb and SECs complexs cooperatively regulate RNA Pol II pause release via different recruitment pathways [PDF]
, 2015 真核基因转录调控是细胞基因表达调控网络的基础，细胞内编码蛋白的基因和核内小RNA（snRNA）的转录是由RNA聚合酶II（RNAPolII）负责的。RNAPolII控制的转录由前起始复合物组装、转录起始、启动子清理、转录延伸、转录终止等5步依次协同完成。正性转录延伸因子b（P-TEFb）发现之前，研究人员一直认为转录前起始复合物组装和转录起始是转录调控的关键步骤。随着人们对P-TEFb在转录调控方面研究的深入，发现转录延伸同样受到严密及精细的调控，是基因转录的限速步骤。 最近的研究表明 ...
陆小冬
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Rare Metals, EarlyView.ABSTRACT Converting CO2 to CH4 under mild conditions is a promising strategy for solving environmental and energy problems, but also a challenge. In this work, the low‐temperature CO2 hydrogenation process over Ni/CeO2 catalysts was significantly accelerated by optimizing the H2 dissociation ability of Ni through the size effect, thus A‐Ni/CeO2 with an
Yu Xie +8 more
wiley +1 more source
, 2010 果糖-1,6-二磷酸酶(EC 3.1.3.11)是糖异生中的关键限速酶之一,在糖代谢中起重要作用。哺乳动物存在肝脏型和肌肉型两种果糖-1,6-二磷酸酶同工酶,分别由Fbp1和Fbp2编码。银鲫作为我国重要的经济养殖鱼类,尚无果糖-1,6-二磷酸酶基因的有关资料,其组织分布特征和胚胎发育模式亦不清楚。本研究采用RACE方法从银鲫原肠胚SMART cDNA文库中扩增了果糖-1,6-二磷酸酶基因的全长cDNA,其长度为1170 bp,编码337个氨基酸残基,多重序列比对和系统发育分析表明该基因为肝脏型果糖 ...
桂建芳, 王锐, 肖青
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Carbon‐Insertion‐Engineered WS2 Hierarchical Heterostructure Enabling Superior Sodium‐Ion Storage
Rare Metals, EarlyView.ABSTRACT Tungsten disulfide (WS2) is considered a promising anode material for sodium‐ion batteries (SIBs). However, its practical application is hindered by poor electrical conductivity, large volume changes during cycling, and sluggish ion diffusion kinetics, which lead to unsatisfactory electrochemical performance.
Xiuli Hu +9 more
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2013 目的制备CS/pcDNA3.1/GDNF混悬液,并对壳聚糖作为基因载体的相关性能进行检测。方法采用复凝聚法制备CS/pcDNA3.1/GDNF混悬液,观察壳聚糖纳米粒子的物理性能,稳定性,基因结合效率,基因保护功能,缓慢释放效果及基因负载力和负载率。结果壳聚糖大小为106-228nm,性质稳定,具有良好的基因携带功能,能够有效地保护所携带基因,基因负载力及基因负载率较高。结论应用复凝聚法制得壳聚糖纳米粒子,能够满足基因载体的需要,是一个较理想的基因载体。
李世龙, 邵国喜, 刘钦毅, 周贺
doaj
Appraisal of the Sri Lanka Dairy Sector volume 2: Main report [PDF]
, 2010 从蛙虹彩病毒（Rana grylio virus,RGV）中克隆出一个虹彩病毒科的序列保守基因RGV-12L,序列分析表明该基因全长894 bp,编码一个含297个氨基酸的多肽,分子量为33 kD。构建包含该基因全长的原核表达载体,进行原核表达,获得了分子量约53 kD的融合蛋白。将融合蛋白经腹腔注射免疫小鼠,制备出鼠抗RGV-12L血清。通过RT-PCR和Western blotting分析RGV感染细胞后RGV-12L的转录时序,感染4h可以在RNA水平检测到RGV-12L的转录 ...
Ibrahim, Mohamed N.M. +3 more
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New Advances of Degradable Magnesium‐Based Metal Biomaterials in the Field of Orthopedics
Rare Metals, EarlyView.ABSTRACT Based on their outstanding biomechanical properties and superior osteogenic activity, magnesium (Mg) and its alloys have been extensively investigated for their biocompatibility and therapeutic efficacy in treating fractures and bone defects.
Jia‐Nan Yu +8 more
wiley +1 more source