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A rarely used unit of length in the U.S. system equal to five and a half feet.


A linear unit of measurement equal to 161/2 feet.

References in periodicals archive ?
Electrophysiological experiments demonstrate that rod cells are able to respond to single photons, Ref ([34], [18], [35]), even though 5- 7 photons per integration window are required for conscious response, Ref ([18], [17]).
They found that eyes containing altered Pias3 did not develop the correct number of rod cells, suggesting that Pias3's SUMOylation activity was the key to its ability to promote rod and suppress cone cell development in the eye.
But that discovery raised another mystery: If Muller cells channel all available light to cone cells, how do rod cells get enough light for people to see in the dark?
Keywords: Olfactory epithelium, cavefishes, Sinocyclocheilus jii, Sinocyclocheilus furcodorsalis, rod cells, chloride cells.
For the blind mice, Swaroop and other researchers would have to figure out how to make new rod cells.
their eyes have many cone cells, relatively few rod cells
That's because the dim-light sensitive rod cells are mostly located at the edge of your retina.
These cells, called rod cells and cone cells, are attached to nerve cells that send signals to the brain.
Rod cells are more numerous than cone cells and are crucial for vision at night and in other low lighting conditions.
Rhodopsins are the primary visual pigment in rod cells in the mammalian retina.
When using "averted vision", you are using the light sensitivity of those outer-lying rod cells.
So researchers packaged the gene for a light-detecting pigment called rhodopsin, found in functional rod cells, inside a virus.