Cercetătorii de la Michigan State University au descoperit o bacterie care are capacitatea de extrage metalul preţios, cu o puritate de 24 de carate, din substanţe din natură care conţin clorură de aur. Bacteria are capacitatea de a rezista la toxicitatea ridicată a substanţelor şi este vedeta a ceea ce deja se cheamă alchimia microbiană.
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