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lumen |
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lumenSI unit of luminous flux (the amount of light passing through an area per second). The lumen is defined in terms of the light falling on a unit area at a unit distance from a light source of luminous intensity of one candela. One lumen at a wavelength of 5,550 angstroms equals 0.0014706 watts. lumenIn biology, the space enclosed by an organ, such as the bladder, or a tubular structure, such as the gastrointestinal tract. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Many of the airways from Mexico City also showed lumenal distortion (Figure 1C). Light microscopy showed a well developed neointima lining the anastomotic region of the graft without apparent lumenal reduction. Instead, evidence suggests that denervation leads to an "up-regulation" of muscarinic receptors that promotes increased calcium influx in the coronary arteries of the transplanted heart, facilitating a more insidious, diffuse, circumferential narrowing of arterial lumenal diameters. |
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