Iphuzu elibilayo elingu-5900 degrees Celsius kanye nobulukhuni obufana nedayimane kuhlanganiswe nekhabhoni: i-tungsten iyinsimbi esinda kakhulu, nokho inomsebenzi webhayoloji—ikakhulukazi kumagciwane athanda ukushisa. Ithimba eliholwa u-Tetyana Milojevic ovela ku-Faculty of Chemistry e-University of Vienna libika okokuqala ngqa ukusebenzisana okungandile kwe-microbial-tungsten ebangeni le-nanometer. Ngokusekelwe kulokhu okutholakele, akuphenywa kuphela nge-tungsten biogeochemistry, kodwa futhi nokuphila kwama-microorganisms ezimeni zasemkhathini wangaphandle. Imiphumela ivele muva nje ephephabhukwini iFrontiers in Microbiology.

Njengensimbi eqinile neyivelakancane, i-tungsten, enezici zayo ezingavamile nendawo yokuncibilika ephakeme kakhulu yazo zonke izinsimbi, iwukukhetha okungenakwenzeka kakhulu ohlelweni lwebhayoloji. Ama-microorganisms ambalwa kuphela, afana ne-thermophilic archaea noma i-cell nucleus-free microorganisms, azivumelanise nezimo ezimbi kakhulu zemvelo ye-tungsten futhi athola indlela yokuhlanganisa i-tungsten. Ucwaningo olubili lwakamuva olwenziwe yisazi samakhemikhali ezinto eziphilayo kanye nesazi sezinkanyezi u-Tetyana Milojevic ovela eMnyangweni Wezesayensi Yezinto Eziphilayo, I-Faculty of Chemistry e-University of Vienna, zisikhanyisela ngendima engaba khona yama-microorganisms endaweni ethuthukiswe i-tungsten futhi zichaza isixhumi esibonakalayo se-nanoscale tungsten-microbial I-microorganism ethanda ukushisa ne-asidi i-Metallosphaera sedula etshalwe ngezinhlanganisela ze-tungsten (Izibalo 1, 2). Yile microorganism futhi ezohlolelwa ukusinda phakathi nohambo lwezinkanyezi ezifundweni ezizayo endaweni engaphandle komkhathi. I-Tungsten ingaba yisici esibalulekile kulokhu.

Ukusuka kuma-tungsten polyoxometalates njengohlaka olugcina impilo lwe-inorganic kuya ekucubungulweni kwe-microbial bioprocessing ye-tungsten ores

Ngokufana namaseli amaminerali e-ferrous sulfide, ama-polyoxometalates okwenziwa (ama-POM) athathwa njengamaseli angaphili ekusizeni izinqubo zamakhemikhali angaphambi kokuphila kanye nokubonisa izici "ezifana nempilo". Kodwa-ke, ukuhambisana kwama-POM ezinqubweni ezisekela ukuphila (isb, ukuphefumula kwe-microbial) akukakaxazululwa. "Sisebenzisa isibonelo se-Metallosphaera sedula, ekhula ku-asidi eshisayo futhi iphefumula ngokusebenzisa i-oxidation yensimbi, siphenye ukuthi izinhlelo eziyinkimbinkimbi ze-inorganic ezisekelwe kumaqoqo we-tungsten POM zingasekela ukukhula kwe-M. sedula futhi zikhiqize ukwanda kwamaselula nokuhlukana," kusho uMilojevic.

Ososayensi bakwazile ukukhombisa ukuthi ukusetshenziswa kwamaqoqo e-POM asuselwa ku-tungsten kuvumela ukuhlanganiswa kwezinhlobo ze-tungsten redox ezihlukile kumaseli amancane. Amadiphozithi e-organometallic ekuxhumaneni phakathi kwe-M. sedula ne-W-POM ahlakazwa afika ebangeni le-nanometer ngesikhathi sokubambisana okunezithelo ne-Austrian Center for Electron Microscopy and Nanoanalysis (FELMI-ZFE, Graz).” Okutholakele kwethu kwengeza i-tungsten-encrusted M. sedula kumarekhodi akhulayo ezinhlobo ze-biomineralized microbial, phakathi kwazo i-archaea engavamile ukumelwa,” kusho u-Milojevic. I-biotransformation ye-tungsten mineral scheelite eyenziwa yi-thermoacidophile M. sedula eyedlulele iholela ekuqhekekeni kwesakhiwo se-scheelite, ukuxazululeka okulandelayo kwe-tungsten, kanye ne-tungsten mineralization ye-microbial cell surface (Umfanekiso 3). I-biogenic tungsten carbide-like nanostructures echazwe ocwaningweni imele i-nanomaterial enamandla esimeme etholwe idizayini yokusiza i-microbial enobungani nemvelo.