There could also be a brand new use for that urine you have been so thoughtlessly flushing. Scientists say it could possibly be an alternate supply of a useful bone- and tooth-repair materials, with a bit of assist from a genetically modified sort of yeast.
Hydroxyapatite is a naturally occurring calcium- and phosphorus-based mineral compound, and is the most important element of bones and tooth enamel. It’s thus utilized in implanted scaffolds used to fix damaged bones, and in dental procedures for restoring weakened or broken tooth.
In people and different animals, hydroxyapatite is produced by specialised cells often known as osteoclasts, which mix collected calcium and phosphate to kind the compound. Sadly, as a result of these cells are troublesome to develop and assist exterior of the physique, cultured hydroxyapatite tends to be fairly costly.
Yeast, then again, is powerful and straightforward to take care of. And what’s extra, a yeast named Saccharomyces boulardii features very like an osteoclast, in that it scavenges minerals from its setting and shops them in part of its physique referred to as the vacuole.
With this reality in thoughts, scientists from the Lawrence Berkeley Nationwide Laboratory set about genetically modifying S. boulardii to make it accumulate calcium and phosphate, then flip these minerals into hydroxyapatite. The ensuing organism has been named “osteoyeast,” and it may get hold of the whole lot it wants from freely-available urine.
It has a conversion effectivity price of 1 gram of hydroxyapatite per kilogram of urine, which ought to doubtless enhance as extra analysis is carried out. The scientists estimate that in a metropolis the scale of San Francisco, it might price about US$19 to provide 1 kg (2.2 lb) of the classy hydroxyapatite, which may promote for anyplace from $50 to $200 within the US market.
It’s hoped that the so-called “pee-cycling” expertise may quickly be put to make use of in sewage remedy crops. There, it may function each a income and a method of breaking down urine for simpler, less expensive elimination from the waste stream.
A paper on the research, which additionally concerned scientists from the College of California Irvine and the College of Illinois Urbana-Champaign, was just lately revealed within the journal Nature Communications.
