Nzvimbo yekuvira ye5900 madhigirii Celsius uye kuoma kwakafanana nedhaimani pamwe chete nekabhoni:tungstenndiyo simbi inorema zvikuru, asi ine mabasa ebhayoloji-kunyanya muhuturu hunoda kupisa.Chikwata chinotungamirwa naTetyana Milojevic kubva kuFaculty of Chemistry paYunivhesiti yeVienna inoshuma kekutanga isingawanzo hutachiona-tungstenkupindirana pane nanometer range.Kubva pane zvakawanikwa izvi, kwete chetetungstenbiogeochemistry, asiwo kurarama kweutachiona munzvimbo dzekunze kunogona kuongororwa.Zvigumisiro zvakabuda munguva pfupi yapfuura mujenariFrontiers muMicrobiology.

Sesimbi yakaoma uye isingawanzoitiki,tungsten, ine zvimiro zvayo zvinoshamisa uye nzvimbo yepamusoro-soro yekunyunguduka kwesimbi dzese, isarudzo isingambofungidzirwe kune biological system.Chete tupukanana tudiki, senge thermophilic archaea kana sero nucleus-isina ma microorganisms, akachinjira kumamiriro akanyanya enzvimbo ye tungsten uye akawana nzira yekufananidza.tungsten.Ongororo mbiri dzichangoburwa nenyanzvi yebiochemist uye nyanzvi yezvenyeredzi Tetyana Milojevic kubva kuDhipatimendi reBiophysical Chemistry, Faculty of Chemistry paYunivhesiti yeVienna, zvinojekesa basa rinobvira rema microorganisms munetungsten-enriched nharaunda uye tsanangura nanoscaletungsten-microbial interface yekupisa kwakanyanya- uye acid-inoda microorganism Metallosphaera sedula inokura netungstenmishonga (Mifananidzo 1, 2).Ndiyo zvakare iyi microorganism inozoedzwa kuti irarame panguva yekufamba pakati penyeredzi mune ramangwana zvidzidzo munzvimbo yekunze.Tungsteninogona kuva chinhu chakakosha mune izvi.

Kubvatungstenpolyoxometalates sehupenyu hunotsigira inorganic masisitimu kune microbial bioprocessing yetungsten ores

Zvakafanana neferrous sulfide mineral cells, artificial polyoxometalates (POMs) anoonekwa semasero emuchadenga mukufambisa maitiro emakemikari epamberi uye kuratidza "sehupenyu" maitiro.Nekudaro, kukosha kwePOM kune nzira dzekuchengetedza hupenyu (semuenzaniso, microbial kufema) haisati yagadziriswa."Tichishandisa muenzaniso weMetallosphaera sedula, inokura mu acid inopisa uye inofema kuburikidza nesimbi oxidation, takaongorora kana yakaoma inorganic masisitimu akavakirwa patungsten POM masumbu anogona kuchengetedza kukura kweM. sedula uye kuburitsa cellular kupararira uye kupatsanura," anodaro Milojevic.

Masayendisiti akakwanisa kuratidza kuti kushandiswa kwetungsten-based inorganic POM masumbu anogonesa kubatanidzwa kwehterogeneoustungstenredox marudzi kuita microbial masero.Iyo organometallic deposits painterface pakati peM. sedula neW-POM yakanyungudika kusvika kune nanometer renji panguva yekudyidzana kune zvibereko neAustrian Center yeElectron Microscopy uye Nanoanalysis (FELMI-ZFE, Graz).Zvatinowana zvinowedzera tungsten-encrusted M. sedula kune zvinyorwa zvinokura zvebiomineralized microbial species, pakati payo archaea isingawanzomiririrwa,” akadaro Milojevic.Iyo biotransformation yetungsten mineralscheelite yakaitwa neakanyanya thermoacidophile M. sedula inotungamira mukuputsika kwechimiro che scheelite, kunotevera solubilization yetungsten,uyetungstenmineralization ye microbial cell surface (Mufananidzo 3).The biogenictungsten carbide-sezvakaita nanostructures zvinotsanangurwa muchidzidzo zvinomiririra inogona kugadzikana nanomaterial yakawanikwa neyakagadzikana ine hushamwari microbial-inobatsirwa dhizaini.

“Zvatinowana zvinoratidza kuti M. sedula mafomutungsten-kubereka mineralized cell surface via encrusting withtungsten carbide-yakafananamakemikari,” anotsanangura kudaro Milojevic, nyanzvi yemakemikari.Izvitungsten-encrusted layer yakaumbwa yakatenderedza maseru eM. sedula inogona kunyatso miririra chirongwa che microbial kutsungirira mamiriro ezvakatipoteredza, senge panguva yerwendo rwepakati penyika.Tungstenencapsulation inogona kushanda sechinhu chine simba reradioprotective nhumbi dzekurwa nemamiriro ekunze akaomarara.Milojevic anopedzisa achiti: "Mirobial tungsten nhumbi dzokurwa nadzo dzinotibvumira kuti tiwedzere kudzidza kurarama kweutachiona uhu munzvimbo yekunze."