搜索结果: 1-15 共查到“知识库 Rac”相关记录16条 . 查询时间(0.011 秒)
My valedictory on the differences in biolog-ical potency between RRR-α-tocopheryl and all-rac-α-tocopheryl acetate
RRR-α-tocopheryl all-rac-α-tocopheryl acetate
2016/5/30
In their study, Marshall et al (1) found a significant relation
between serum LDL cholesterol and saturated fat intake when
random-effects models for longitudinal data were used. The
model paramete...
Rac and Cdc42 GTPases control hematopoietic stem cell shape, adhesion, migration, and mobilization
Rac Cdc42
2014/12/12
Critical to homeostasis of blood cell production by hematopoietic stem/progenitor (HSC/P) cells is the regulation of HSC/P retention within the bone marrow microenvironment and migration between the b...
Rac Activation Induces NADPH Oxidase Activity in Transgenic COSphox Cells and Level of Superoxide Production is Exchange Factor-Dependent
NADPH oxidase Rac
2014/12/12
Transient expression of constitutively active Rac1 derivatives, (G12V) or (Q61L), was sufficient to induce phagocyte NADPH oxidase activity in a COS-7 cell model in which human cDNAs for essential oxi...
Rac GTPase isoform-specific regulation of NADPH oxidase and chemotaxis in murine neutrophils in vivo: Role of the C-terminal polybasic domain
Rac GTPase NADPH oxidase
2014/12/12
The Rho family GTPase Rac acts as a molecular switch for signal transduction to regulate various cellular functions. Mice deficient in the hematopoietic-specific Rac2 isoform exhibit agonist-specific ...
Rac及其下游靶蛋白p21活化激酶(PAK)均是最近新发现的多功能效应因子，与多种肿瘤的发生、发展密切相关。PAK主要通过其N端调节/黏附区的p21结合域(PBD)与上游调节器Rac相互作用从而使Rac/PAK信号通路激活，在结直肠癌的发生、发展、侵袭及转移中发挥重要的作用。随着研究的深入，越来越多的证据表明Rac/PAK信号通路不仅可以作为一种预测因子来判断结直肠癌的恶性进展及估计预后并且可能成...
探讨谷胱甘肽S转移酶π（GST-π）和Ras相关的C3肉毒素底物1（Rac-1）在肝细胞性肝癌（HCC）中的表达水平及其与临床病理参数和预后的关系。方法：应用免疫组织化学法检测82例HCC组织和30例正常肝组织中的GST-π和Rac-1表达，依据阳性细胞计数与染色强度相结合的二级计分法将两蛋白均分为高表达和低表达两组，分析该两组与常见病理参数的关系及两蛋白的相关性；采用Kaplan-Meier生存...
通过对不同取代率时再生混凝土(RAC)梁裂缝宽度进行长期加载试验研究, 分析了短长期荷载作用下正截面裂缝随时间变化而发展的规律. 研究表明：长期荷载作用下, 再生混凝土裂缝较普通混凝土的快增长时期出现显著“后延”特点, 且增长期持续时间变长. 以试验结果为依据, 拟合回归出内力臂系数、平均裂缝间距、钢筋应变不均匀系数计算公式, 建立了以综合法为理论基础的短期裂缝最大宽度计算公式, 通过多方数据校核...
Synthetic spatially graded Rac activation drives directed cell polarization and locomotion
Synthetic spatially graded Rac directed cell polarization and locomotion Molecular Networks
2012/5/2
Migrating cells possess intracellular gradients of Rho GTPases, but it is unknown whether these shallow gradients themselves can induce motility. Here we describe a new method to present cells with in...
In this paper we show how to break the most recent version of
EC-RAC with respect to privacy.We show that both the ID-Transfer and
ID&PWD-Transfer schemes from EC-RAC do not provide the claimed
pri...
Untraceable RFID protocols are not trivially composable:Attacks on the revision of EC-RAC
Untraceable RFID protocols Attacks EC-RAC
2009/7/14
It is well-known that protocols that satisfy a security prop-
erty when executed in isolation do not necessarily satisfy the same se-
curity property when they are executed in an environment contain...
Oracle 10g RAC核心技术研究与分析
网格计算技术 高速缓存合并 透明应用切换
2009/5/8
以企业IT面临的难题为背景，分析了企业网格计算相对于传统计算的优势，提出了利用网格技术解决企业难题的观点；研究了Oracle 10g核心组件RAC的技术特点，对这些特点的原理进行逐一分析；架设RAC系统实例，并对其进行功能验证、性能测试以及结果分析。
基于大景深三维扫描系统的倾斜摄像机模型,推导了新的物像关系并修正了Tsai的RAC标定法.利用修正后的RAC标定法对大景深扫描系统的摄像机进行了标定, 实验结果表明修正后的RAC标定法适用于倾斜的摄像机系统，标定准确度可以达到0.03 mm.
摘要为研究棉花纤维起始和伸长的分子机理，在棉花纤维EST序列分析的基础上，从棉花纤维中扩增并克隆了2个棉花Rac蛋白的cDNA基因，分别命名为GhRacA和GhRacB。GhRacA cDNA长959 bp，推测的编码蛋白包含211个氨基酸。GhRacB cDNA长920 bp，编码195个氨基酸的蛋白。GhRacA和GhRacB蛋白均含有GTP/GDP结合和激活区域、Effector区和碱性氨基...
合成了后过渡金属铁(2-Me-3-ClPh)2PBIMe2FeCl2低聚催化剂，并与亚乙基桥茂金属共聚催化剂rac-C2H4(Ind)2ZrCl2共用，用MAO（1.4 mol/L甲苯溶液）作为助催化剂，原位共聚合成线性低密度聚乙烯（LLDPE）.结果发现，这种后过渡铁催化剂具有很高的低聚催化活性［1.0×107 g oligomer/(mol Fe·h)］，双功能催化体系的催化活性保持在106 ...