Wurin tafasa na 5900 ma'aunin Celsius da taurin lu'u-lu'u kamar lu'u-lu'u a hade tare da carbon: tungsten shine karfe mafi nauyi, duk da haka yana da ayyukan halitta-musamman a cikin ƙananan ƙwayoyin cuta masu ƙauna. Tawagar da Tetyana Milojevic ke jagoranta daga Sashen Chemistry a Jami'ar Vienna ta ba da rahoto a karon farko da ba a cika samun mu'amalar microbial-tungsten a kewayon nanometer ba. Dangane da waɗannan binciken, ba wai kawai tungsten biogeochemistry ba, har ma da tsirar ƙwayoyin ƙwayoyin cuta a cikin yanayin sararin samaniya za a iya bincika. Sakamakon ya bayyana kwanan nan a cikin mujallar Frontiers in Microbiology.

A matsayinsa na ƙarfe mai wuya kuma ba kasafai ba, tungsten, tare da kaddarorinsa na ban mamaki da mafi girman ma'aunin narkewar dukkan karafa, zaɓi ne da ba zai yuwu ba ga tsarin ilimin halitta. Kadan ƙananan ƙwayoyin cuta, irin su thermophilic archaea ko ƙananan ƙwayoyin cuta marasa ƙwayoyin cuta, sun dace da matsananciyar yanayin yanayin tungsten kuma sun sami hanyar da za su iya daidaita tungsten. Nazari biyu na baya-bayan nan da masanin kimiyyar halittu da astrobiologist Tetyana Milojevic daga Sashen Biophysical Chemistry, Faculty of Chemistry a Jami'ar Vienna, ya ba da haske kan yuwuwar rawar da kwayoyin halitta ke takawa a cikin yanayin da ke da wadatar tungsten kuma ya bayyana wani nanoscale tungsten-microbial interface na matsananci. zafi- da acid-son microorganism Metallosphaera sedula girma tare da tungsten mahadi (Figures 1, 2). Hakanan wannan ƙananan ƙwayoyin cuta ne wanda za'a gwada don tsira yayin balaguron balaguro a cikin binciken gaba a cikin yanayin sararin samaniya. Tungsten na iya zama muhimmiyar mahimmanci a cikin wannan.

Daga tungsten polyoxometalates azaman tsarin inorganic tsarin rayuwa mai dorewa zuwa ƙwayoyin ƙwayoyin cuta na ƙwayoyin tungsten.

Kama da ƙwayoyin ma'adinai na sulfide na ferrous, polyoxometalates na wucin gadi (POMs) ana ɗaukar su azaman ƙwayoyin ƙwayoyin cuta a cikin sauƙaƙe hanyoyin sinadarai na farko da kuma nuna halayen "kamar rayuwa". Duk da haka, har yanzu ba a magance dacewar POMs zuwa hanyoyin kiyaye rayuwa ba (misali, respiration na microbial). "Yin amfani da misalin Metallosphaera sedula, wanda ke tsiro a cikin acid mai zafi kuma yana shayarwa ta hanyar iskar oxygen ta karfe, mun bincika ko hadaddun tsarin inorganic wanda ya dogara da tungsten POM clusters zai iya ci gaba da ci gaban M. sedula kuma ya haifar da haɓakar salula da rarraba," in ji Milojevic.

Masana kimiyya sun sami damar nuna cewa yin amfani da gungu na POM na tushen tungsten yana ba da damar haɗa nau'ikan redox iri-iri na tungsten a cikin ƙwayoyin ƙwayoyin cuta. Abubuwan ajiya na organometallic a mahaɗin tsakanin M. sedula da W-POM an narkar da su zuwa kewayon nanometer yayin haɗin gwiwa mai amfani tare da Cibiyar Electron Microscope da Nanoanalysis (FELMI-ZFE, Graz). Abubuwan da muka gano suna ƙara tungsten-encrusted M. sedula zuwa ga bayanan girma na nau'ikan ƙwayoyin cuta na biomineralized, waɗanda ba a cika samun wakilcin archaea ba, "in ji Milojevic. A biotransformation na tungsten ma'adinai scheelite yi da matsananci thermoacidophile M. sedula take kaiwa zuwa karya tsarin scheelite, m solubilization na tungsten, da tungsten mineralization na microbial cell surface (Hoto 3). Nanostructures na tungsten carbide mai kama da nanostructures da aka bayyana a cikin binciken suna wakiltar yuwuwar ci gaban nanomaterial da aka samu ta hanyar ƙira ta taimakon ƙananan ƙwayoyin cuta.