Eclectic Perambulations in the Noosphere
Researchers have studied these “diamonds” since the weevil’s discovery in the early 19th century but, until recently, no one knew know how the scales reflected so much light."
Atom-probe tomography (APT) of "the black teeth of an Eastern beaded chiton, a sea mollusk, are used for scraping algae from rocks. They are capped with one of the hardest biominerals known, a nanocomposite of magnetite and chitin-based fibers. (Credit: Image courtesy of Northwestern University) "
"Teeth and bone are important and complex structures in humans and other animals, but little is actually known about their chemical structure at the atomic scale. What exactly gives them their renowned toughness, hardness and strength? How do organisms control the synthesis of these advanced functional composites?"
Luminescent concrete emits light by means of phosphorescence. Ultraviolet light is absorbed and re-emitted at higher wave-lengths, creating a visible glow. When the phosphorescent pigment is added to expansion cement, an uneven distribution provides record of mixing strokes. When the phosphorescent pigment is used as an aggregate in concrete, the even distribution promotes average uniformity in light emission. As the concrete surface erodes, virgin aggregate is exposed, extending the lifespan of luminescence.
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