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6篇 您的检索式:作者名="A.Evans"
    题名 作者 年代 出处 被引量
1最小的大容量电容器——Evans混合电容器显示文摘介绍了一种由钽阳极、Ta2O5介质、液体电解质和RuO2阴极组成的高能量密度电容器——Evans混合电容器 (Evans Hybrid capacitors)。它具有与电化学电容器相当的能量密度和比电解电容器更完善的交流特性。单元工作电压达215 V。目前已实现了用改进封装技术将若干个该类电容器并联封装在同一外壳内。给出了50 V,18 mF混合电容的性能数据。David A.Evans 白丁 2002电子元件与材料2002,21,10:8
2Amnion epithelial cells——a novel therapy for ischemic stroke?显示文摘Stroke is a leading cause of death and disability and new therapies are desperately needed. Given the complex nature of ischemic brain injury, it has been postulated that cell-based therapies may be useful. However, cell resources, invasive extraction procedures, immunological rejection, tumorigenesis and ethical challenges make it unlikely that many stem cell types could serve as a practical source for therapy. By contrast, these issues do not pertain to human amnion epithelial cells(h AECs), which are placenta-derived stem cells. We recently assessed the effects of systemically delivered hAECs on stroke outcome using four animal models of stroke. We demonstrated that when injected intravenously after ischemia onset, hAECs migrate preferentially to the spleen and injured brain to limit apoptosis and inflammation, and attenuate early brain infiltration of immune cells, progression of infarction and systemic immunosuppression and to ultimately ameliorate functional deficits. When administration of hAECs is delayed by 1-3 days poststroke, long-term functional recovery can still be enhanced in young and aged mice of either sex. Moreover, our proof-of-principle findings suggest that h AECs are effective at limiting post-stroke infarct development in non-human primates. Overall, the results suggest that hAECs could be a viable clinical stroke therapy.Megan A.Evans Brad R.S.Broughton Grant R.Drummond Henry Ma Thanh G.Phan Euan M.Wallace Rebecca Lim Christopher G.Sobey 2018Neural Regeneration Research2018,13,8:4
3七星瓢虫唇须感器分布和统计特征的雌雄差异(英文)显示文摘应用扫描电镜观察七星瓢虫Coccinella septempunctata的唇须和附节,以便确认在感应农药残留时起主要作用的化学感受器。研究证明分布在下颚须上的感器类型包括两种锥形感器(兼有机械感受器和化学感受器的功能)和一种钟形感器。同时本文首次报道了对这些感器精确的形态测量,明确了其性二型性。对下颚须的测量表明其左右末节的长度差异与七星瓢虫的性别之间有明显的相关性。文中还记述了下唇须上一种新的钟形感器,其在每个下唇须上的数量大约为12 ~17个。经测量这些机械感受器的平均直径为2.4μm。早期研究中所记述的锥形感器被证实是下唇须上仅有的化学感应器,并且首次证明这些锥形感器的数量与性别相关,雄性平均为18个,雌性平均为16个。附节上也存在性别差异:第2跗节跗垫的宽度在雄性中是从后向前逐渐增大,而在雌性中刚好相反。本文还就这些差异的意义以及新发现感器的功能进行了讨论。Daniel G.THORNHAM Maureen E.WAKEFIELD Alison BLACKWELL Kenneth A.EVANS Keith F.A.WALTERS 2007昆虫学报2007,50,7:1
4Hospitalized incidence and case fatality for upper gastrointestinal bleeding from 1999 to 2007: a record linkage study显示文摘L. A.Button S. E.Roberts P. A.Evans M. J.Goldacre A.Akbari R.Dsilva S.Macey J. G.Williams 2010Alimentary Pharmacology & Therapeutics2010,,1:1
5A strategy for the comparative analysis of serum proteomes for the discovery of biomarkers for hepatocellular carcinoma显示文摘Laura F.Steel DonnaShumpert MichaelTrotter Steven H.Seeholzer Alison A.Evans W. ThomasLondon RaymondDwek Timothy M.Block 2003Proteomics2003,,5:1
6细胞无性系变异及其在植物育种体上的应用显示文摘科学家们对生长在培养基上的植物细胞产生广泛的遗传变异的发现已有若干年了。早期的一些报道记述了细胞的多倍性、非整倍性、细胞分裂后期桥,以及片段和染色体的稳定性。过去几年的研究观察大体上已得出一个结论:长期生长在培养基上的植株细胞遗传是不稳定的,通常会失去再生植株的能力。David A.Evans 陈志贤 王娇娟 1989生物技术通报1989,5,5:0
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