Word: retinas
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Dates: during 1990-1999
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Although a detached retina has robbed Mittarakis of sight in her right eye and she has lost 60% of the vision in her left eye, she continues to produce canvases at home on Paqueta Island off the coast of Rio. The work reproduced on this week's cover is an acrylic portrayal of the Tijuca forest overlooking...
...gene is responsible for the production of peripherin, a protein necessary for normal operation of light-sensitive cells in the retina...
...plants convert sunlight into energy through the process of photosynthesis. Physicists from California's Lawrence Berkeley Laboratory reported that they used such a laser to take a "snapshot" of the chemical reaction that is the first step in visual perception. This reaction, triggered when light hits the retina of the eye, had never before been directly observed. And with good reason. The reaction was clocked by the L.B.L. team at 200 femtoseconds, which are millionths of a billionth of a second. How fast is that? Well, in little more than a second, light can travel all the way from...
Would even the most loving family members want to be forced by the courts to donate a kidney or a retina to an ailing child or sibling? The chemistry of love and courage often inspires one relative to donate organs to another. But to do so is an act of will, born of the impulses of a generous individual -- not the mandate...