Indawo yokubilisa ye-5900 degrees Celsius kunye nobunzima obufana nedayimani zidityaniswe nekhabhoni:i-tungstensesona sinyithi sinzima, kodwa sinemisebenzi yebhayoloji-ingakumbi kwiintsholongwane ezithanda ubushushu.Iqela elikhokelwa nguTetyana Milojevic ovela kwiFaculty of Chemistry kwiYunivesithi yaseVienna ingxelo okokuqala enqabileyo i-microbial-i-tungstenUnxibelelwano kuluhlu lwe-nanometer.Ngokusekelwe kwezi ziphumo, hayi kuphelai-tungstenI-biogeochemistry, kodwa kunye nokuphila kwe-microorganisms kwiimeko zangaphandle kunokuphandwa.Iziphumo zivele kutshanje kwijenaliImida kwiMicrobiology.

Njengentsimbi eqinileyo nenqabileyo,i-tungsten, kunye neempawu zayo ezingaqhelekanga kunye neyona ndawo iphakamileyo yokunyibilika kuzo zonke iintsimbi, lukhetho olungenakwenzeka kakhulu kwinkqubo yebhayoloji.Kuphela zii-microorganisms ezimbalwa, ezifana ne-thermophilic archaea okanye i-cell nucleus-free microorganisms, ziye zaqhelana neemeko ezigqithiseleyo ze-tungsten kwaye zifumene indlela yokulinganisa.i-tungsten.Izifundo ezibini zamva nje ze-biochemist kunye ne-astrobiologist uTetyana Milojevic ovela kwiSebe le-Biophysical Chemistry, iFaculty of Chemistry kwiYunivesithi yaseVienna, zikhanyisela indima enokubakho yee-microorganisms kwindawoi-tungsten-indawo ephuculweyo kwaye ichaze i-nanoscalei-tungsten-ujongano lwemicrobial yobushushu obugqithisileyo- kunye ne-acid-ethanda imicroorganism iMetallosphaera sedula ekhuliswe ngayoi-tungsteniikhompawundi (Amanani 1, 2).Ikwayile microorganism eya kuvavanywa ukusinda ngexesha lokuhamba kwe-interstellar kwizifundo ezizayo kwindawo yangaphandle.Tungsteninokuba yinto ebalulekileyo kule nto.

Ukusukai-tungsteni-polyoxometalates njengezikhokelo ezigcina ubomi kwi-microbial bioprocessing yeore tungsten

Ngokufana neeseli ze-ferrous sulfide mineral, i-polyoxometalates eyenziweyo (i-POMs) ithathwa njengeeseli ze-inorganic ekuququzeleleni iinkqubo zeekhemikhali zangaphambili kunye nokubonisa iimpawu "ezifana nobomi".Nangona kunjalo, ukufaneleka kwee-POM kwiinkqubo zokulondoloza ubomi (umz., i-microbial respiration) ayikaqwalaselwa."Ukusebenzisa umzekelo we-Metallosphaera sedula, ekhula kwi-asidi eshushu kwaye iphefumle nge-oxidation yensimbi, siye saphanda ukuba iinkqubo eziyinkimbinkimbi ze-inorganic ezisekelwe kumaqela e-tungsten e-POM zinokugcina ukukhula kwe-M. sedula kunye nokuvelisa ukwanda kwamaselula kunye nokwahlula," kusho uMilojevic.

Izazinzulu ziye zakwazi ukubonisa ukuba ukusetyenziswa kwei-tungsten-Amaqela e-POM asekelwe kwi-inorganic enza ukuba kufakwe i-heterogeneousi-tungsteniintlobo ze-redox kwiiseli ze-microbial.Iidiphozithi ze-organometallic kunxibelelwano phakathi kwe-M. sedula kunye ne-W-POM ziye zanyibilika zaya kutsho kuluhlu lwenanometer ngexesha lentsebenziswano eneziqhamo neZiko laseAustria le-Electron Microscopy kunye neNanoanalysis (FELMI-ZFE, Graz).Iziphumo zethu zongeza i-tungsten-encrusted M. sedula kwiirekhodi ezikhulayo zeentlobo ze-biomineralized microbial, phakathi kwazo i-archaea inqabile ukumelwa, "kusho uMilojevic.I-biotransformation yeiminerali ye-tungsteni-scheelite eyenziwa yi-thermoacidophile egqithisileyo M. sedula ikhokelela ekwaphukeni kwesakhiwo se-scheelite, ukunyibilika okulandelayoi-tungsten, kwayei-tungsteni-mineralization ye-microbial cell surface (Umfanekiso 3).Ibhayojenitungsten carbide-efana ne-nanostructures echazwe kuphononongo imele i-nanomaterial enokuthi igcineke efunyenwe yi-design-friendly microbial-assisted design.

“Iziphumo zethu zibonisa ukuba iifom ze-M. sedulai-tungsten-ethwele mineralized cell surface ngokusebenzisa encrusting ngetungsten carbide-likeiikhompawundi,” icacisa ingcali ngemichiza yezinto eziphilayo uMilojevic.Okui-tungstenUmaleko owenziweyo owenziwe malunga neeseli ze-M. sedula unokumela isicwangciso semicrobial ukumelana neemeko ezirhabaxa zokusingqongileyo, ezifana nohambo phakathi kweeplanethi.Tungsteni-encapsulation inokusebenza njengesikrweqe esinamandla se-radioprotective ngokuchasene neemeko ezirhabaxa zokusingqongileyo.“Isikrweqe se-tungsten esisesibhakabhakeni sivumela ukuba siqhubele phambili sifundisisa ukusinda kwale microorganism kwindawo engaphandle,” uqukumbela ngelithi uMilojevic.