"BacillaFilla," is the pet-name given by University of Newcastle researchers to a gengineered bacterium based on Bacillus subtilis that has been modified to fill and bond cracks in cement caused by earthquakes and other violence. The bacteria burrow into the concrete until they have filled all its cracks, then they politely turn into calcium carbonitecarbonate and die.
The researchers have tweaked it's genetic properties such that it only begins to germinate when it comes in contact with the highly-specific pH of concrete. Once the cells germinate, they are programmed to crawl as deep as they can into cracks in the concrete, where quorum sensing lets them know when enough bacteria have accumulated.
That accumulation lets the bacteria know they've reached the deepest part of the crack, at which point the cells begin to develop into bacterial filaments, cells that produce calcium carbonate, and cells that secrete a kind of bacterial glue that binds everything together. Once hardened, the bacteria is essentially as strong as the concrete itself, restoring structural strength and adding life to the surrounding concrete.
The bacteria also contains a self-destruct gene that keeps it from wildly proliferating away from its concrete target, because a runaway patch of bacterial concrete that continued to grow despite all efforts to stop it would be somewhat annoying
Why does The Caterpillar Lab only have 44 subscribers? Caterpillars set to smooth jazz, like these gorgeous stinging rose caterpillars checking each other out, make this New Hampshire nonprofit a hidden gem.
A paper from a group of Kings College London researchers documents an unexpected and welcome side effect from an experimental anti-Alzheimer’s drug called Tideglusib: test subjects experienced a regeneration of dentin, the bony part of teeth that sits between the pulp and the enamel.
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The 2016 World Series game 7 will undoubtedly go down in history as one of the greatest baseball games of all time. With endless suspense, a nefariously-timed rain delay, and extra innings, it reminded over 40 million viewers why they love America’s pastime – and why all bets were truly off in 2016. Savor the […]