منابع مشابه
A Straight and Narrow Ionized Filament
We report the discovery of a extremely narrow, extremely linear, ionized filament. The filament is ∼ 2.5◦ long and has an Hα surface brightness of ∼0.5 rayleighs. It is at high galactic latitude, stretching from (l, b) = (140.8◦, 39.0◦) to (138.0◦, 37.7◦). The filament is approximately “Y” shaped. The vertical segment of the “Y” is ∼ 1.2◦ long and ∼ 20′′ wide, and the widest separation of the t...
متن کاملOrientation Tuning—A Crooked Path to the Straight and Narrow
Neurons in visual cortex are selective for the orientation of a visual stimulus, while the receptive fields of their thalamic input are circular. Cortical orientation selectivity arises from the organization of both thalamic input and local cortical circuits. In this issue of Neuron, Schummers and colleagues provide evidence that the local circuit mechanisms contributing to orientation selectiv...
متن کاملLeading article What keeps hepatocytes on the straight and narrow? Maintaining diVerentiated function in the liver
The liver in general and hepatocytes in particular maintain an awesome array of function—synthesis, catabolism, intermediary metabolism, and detoxification. Recent work has enlarged our knowledge of the factors that permit this range of function to be expressed, and in particular the complex inter-relations of cellular and non-cellular elements in the liver that contribute to this. The function...
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The past decade has seen a tremendous increase in the number of men treated for hypogonadism with the expectation of symptomatic benefit. However, the long-term cardiovascular safety of testosterone replacement remains unknown because retrospective studies of testosterone replacement have been inconsistent, and definitive, prospective, randomized studies are lacking. The purpose of this review ...
متن کاملEngineering on the straight and narrow: the mechanics of nanofibrous assemblies for fiber-reinforced tissue regeneration.
Tissue engineering of fibrous tissues of the musculoskeletal system represents a considerable challenge because of the complex architecture and mechanical properties of the component structures. Natural healing processes in these dense tissues are limited as a result of the mechanically challenging environment of the damaged tissue and the hypocellularity and avascular nature of the extracellul...
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ژورنال
عنوان ژورنال: Nature
سال: 2003
ISSN: 0028-0836,1476-4687
DOI: 10.1038/424378a