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541.
542.
Atherosclerotic plaque development 总被引:1,自引:0,他引:1
Quang T. Bui Maxwell Prempeh Robert L. Wilensky 《The international journal of biochemistry & cell biology》2009,41(11):2109-2113
Atherosclerosis is now recognized as an inflammatory/immunomodulatory reaction to the presence of oxidized low-density lipoproteins within the arterial wall, often times in the setting of such risk factors as family history, hypercholesterolemia, high blood pressure, diabetes mellitus and smoking. The progression to high-risk lesions such as thin-fibrous cap atheromas results in an increased risk of sudden death, acute myocardial infarction and ischemic stroke. The interplay of macrophages, T lymphocytes and mast cells play a central role in both the development but more importantly in the progression of coronary and carotid artery disease to high-risk phenotypes. 相似文献
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544.
Optical Modeling of Plasmonic Nanoparticles Enhanced Light Emission of Silicon Light-Emitting Diodes
Significant enhancement of radiative efficiency of thin-film silicon light-emitting diodes achieved by placing the active
layer in close proximity to silver (Ag) nanoparticles has been observed. In this paper, optical properties including transmission,
reflection, and absorption of a random assembly of Ag nanoparticles are theoretically investigated using the effective medium
model. Furthermore, the influence of Ag nanoparticles on light emission of silicon light-emitting diodes is studied by an
improved effective mode volume model we propose here. The normalized line shape of dipole oscillation is calculated directly
using Lorentz–Drude model without using any approximation. Thus, it results in more accurate calculation of the enhanced Purcell
factor in comparison with the conventional approach. We show that an enhancement of radiative efficiency of silicon light-emitting
diodes can be achieved by localized surface plasmons on metal nanoparticles. The calculated result of optimal Ag nanoparticle
size to enhance light emission of silicon light-emitting diodes at 900 nm wavelength is in very good agreement with those
obtained from the experimental result. The model is useful for the design of metallic nanoparticles enhanced light emitters. 相似文献
545.