منابع مشابه
Theory of myelin coiling.
A new model is proposed to explain coiling of myelins composed of fluid bilayers. This model allows the constituent bilayer cylinders of a myelin to be non-coaxial and the bilayer lateral tension to vary from bilayer to bilayer. The calculations show that a myelin would bend or coil to lower its free energy when the bilayer lateral tension is sufficiently large. From a mechanical point of view,...
متن کاملStent-Assisted Coiling versus Coiling in Treatment of Intracranial Aneurysm: A Systematic Review and Meta-Analysis
BACKGROUND AND PURPOSE Stent-assisted coiling was initially invented for wide-neck aneurysms, but is now used for smaller berry aneurysms. The aim of this study was to compare the safety and efficiency of stent-assisted coiling with conventional coiling in treatment of intracranial aneurysms. METHODS A meta-analysis of studies that compared stent-assisted coiling with coiling only was conduct...
متن کاملA single center comparison of coiling versus stent assisted coiling in 90 consecutive paraophthalmic region aneurysms.
INTRODUCTION Aneurysm recurrence is a principle limitation of endovascular coiling procedures, with recurrence rates reported of >30%. The adjunct use of self-expandable stents has revolutionized the treatment of intracranial aneurysms, especially for complex morphologies, wide necks or unfavorable dome to neck ratios. However, further investigation into the durability and outcomes of stent ass...
متن کاملDouble Negativity in 3D Space Coiling Metamaterials
Metamaterials displaying negative refractive index has remarkable potential to facilitate the manipulation of incident waves for wide variety of applications such as cloaking, superlensing and the like. Space-coiling approach is a recently explored technique to achieve extreme properties. The space coiling phenomena cause less energy absorption as compared to local resonating phenomena for obta...
متن کاملDevelopment of intestinal coiling in anuran larvae.
In aquatic vertebrates such as the cyclostomes, fishes, and urodele Amphibia, the digestive tract develops as a relatively straight tube characteristicalaly bent toward the right side in the region of the pylorus and duodenum. Aiiuran amphibians excite particular interest because they are the most primitive vertebrate group to deve1,op a highly coiled intestine, such as amniotes generally posse...
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ژورنال
عنوان ژورنال: Evolution
سال: 1955
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1955.tb01535.x