Meel karkaraya oo ah 5900 darajo Celsius iyo adayg dheeman u eg marka lagu daro kaarboon: tungsten waa birta ugu culus, haddana waxay leedahay hawlo bayooloji ah-gaar ahaan nooleyaasha kulaylka jecel.Koox uu hogaaminayo Tetyana Milojevic oo ka socota Kulliyadda Chemistry-ga ee Jaamacadda Vienna ayaa warbixin ka soo saartay markii ugu horreysay isdhexgalka microbial-tungsten ee cabbirka nanometerka.Iyada oo ku saleysan natiijooyinkaan, ma aha oo kaliya tungsten biogeochemistry, laakiin sidoo kale badbaadada nooleyaasha ee xaaladaha hawada sare ayaa la baari karaa.Natiijadu waxay dhawaan ka soo muuqatay joornaalka Frontiers in Microbiology.

Sida bir adag oo naadir ah, tungsten, oo leh sifooyinkeeda aan caadiga ahayn iyo meesha ugu sareysa ee dhalaalidda biraha oo dhan, waa doorasho aan suurtagal ahayn ee nidaamka noolaha.Kaliya dhawr jeer oo yaryar, sida arcaea thermophilic ama microorganisms-ka xorta ah ee nucleus-ka, ayaa la qabsaday xaaladaha ba'an ee deegaanka tungsten waxayna heleen hab ay ku milmaan tungsten.Laba daraasadood oo ay dhowaan sameeyeen khabiir ku takhasusay cilmiga bayoolajiga iyo astrobiologist Tetyana Milojevic oo ka tirsan Waaxda Biophysical Chemistry, Kulliyadda Chemistry ee Jaamacadda Vienna, ayaa iftiimisay doorka suurtagalka ah ee noolaha ee deegaanka tungsten-ka hodanka ah oo qeexaya nanoscale tungsten-microbial interface ee aadka u daran. Kuleylka iyo aashitada-jecel microorganism Metallosphaera sedula oo lagu koray xeryahooda tungsten (Jaantus 1, 2).Sidoo kale waa microorganism-kan oo lagu tijaabin doono badbaadada inta lagu jiro safarka interstellar ee daraasadaha mustaqbalka ee jawiga hawada sare.Tungsten waxay noqon kartaa arrin muhiim ah tan.

Laga soo bilaabo tungsten polyoxometalates oo ah qaab-dhismeedka noolaha ee noolaha-ilaalinta bioprocessing-ka microbial ee macdanta tungsten

Si la mid ah unugyada macdanta ferrous sulfide, polyoxometalates macmal ah (POMs) ayaa loo tixgaliyaa inay yihiin unugyo aan dabiici ahayn oo fududeynaya hababka kiimikada ee nolosha hore iyo muujinta sifooyinka "nolosha u eg".Si kastaba ha ahaatee, ku habboonaanta POM-yada hababka nolosha- waaritaanka (tusaale, neefsiga microbial) weli lama hadlin."Iyadoo la adeegsanayo tusaalaha Metallosphaera sedula, oo ku koraya aashitada kulul oo ay ku neefsato iyada oo loo marayo oxidation birta, waxaan baarnay in nidaamyada isku-dhafka ah ee isku dhafan ee ku salaysan tungsten POM clusters ay sii wadi karaan kobaca M. sedula waxayna dhalin karaan kororka unugyada iyo kala qaybinta," ayuu yiri Milojevic.

Cilmi-baadhayaashu waxay awoodeen inay muujiyaan in isticmaalka tungsten-ku-salaysan koox-kooxeedka POM-ku ay awood u siinayso in lagu daro noocyada kala duwan ee tungsten redox ee unugyada microbial.Kaydka organometallic ee isku xirka u dhexeeya M. sedula iyo W-POM ayaa lagu kala direy ilaa kala duwanaanshaha nanometerka inta lagu guda jiro wadashaqeyn midho dhal ah oo lala yeesho Xarunta Australiya ee Electron Microscope iyo Nanoanalysis (FELMI-ZFE, Graz)."Natiijooyinkayagu waxay ku daraan tungsten-encrusted M. sedula diiwaannada sii kordhaya ee noocyada microbial biomineralized, kuwaas oo ay ka mid yihiin archaea dhif ah lagu matalo, "ayuu yiri Milojevic.Biotransformation of tungsten macdanta scheelite by thermoacidophile M. sedula ee ba'an waxay keenaysaa in la jebiyo qaab dhismeedka scheelite, solubilization ku xiga ee tungsten, iyo macdanta tungsten ee dusha unugyada microbial (Jaantus 3).Nanostructures-ka biogenic tungsten carbide-u eg nanostructures lagu tilmaamay daraasadda ka dhigan nanomaterial iman kara waara oo la helay by naqshadeynta microbial-caawisay deegaanka saaxiibtinimo.