I-Dithiothreitol (DTT), CAS: 3483-12-3, njenge-reagent yophando lwesayensi esetyenziswa kakhulu, idla ngokusetyenziswa njenge-arhente yokunciphisa i-sulfhydryl DNA, i-arhente yokunciphisa ukhuseleko, kunye nokunciphisa iibhondi ze-disulfide kwiiproteni. Uhlobo olutsha lwesongezo esiluhlaza ludlala indima ebalulekileyo ekuphuculeni ukusebenza kwebhetri.
I-Dithiothreitol (DTT) yiarhente yokunciphisa enamandla, kwaye ukuncitshiswa kwayo kubangelwa kakhulu kukuzinza kwesangqa esineenxalenye ezintandathu (esineebhondi ze-disulfide) kwimeko yayo yokuxinana. Ukuncitshiswa kwebhondi eqhelekileyo ye-disulfide yi-dithiothreitol kuqulathe ii-reaction ezimbini ezilandelelanayo ze-sulfhydryl-disulfide bond exchange. Amandla okunciphisa e-dithiothreitol (DTT) achatshazelwa lixabiso le-pH, kwaye inokudlala kuphela isiphumo sokunciphisa xa ixabiso le-pH lingaphezulu kwe-7. Oku kungenxa yokuba zii-anion ze-thiolate ezingasebenziyo kuphela ezisabelayo, ngelixa ii-mercaptans zingenzi njalo, kwaye i-pKa yamaqela e-mercapto ngokubanzi yi-8.3.
I-Dithiothreitol (DTT) isetyenziswa kakhulu ukunciphisa iibhondi ze-disulfide zeemolekyuli zeproteni kunye neepolypeptides. Ihlala isetyenziswa njenge-protective agent yeproteni ye-sulfhydryl kwaye isetyenziswa kumalungiselelo okugonya ukuthintela iintsalela zeproteni ze-cysteine ekubeni zenze i-intramolecular kunye ne-intermolecular disulfides. Kwinkqubo yokufumanisa i-nucleic acid, i-dithiothreitol (DTT) inokutshabalalisa iibhondi ze-disulfide kwiproteni ye-RNase, iguqule i-RNase, kwaye iququzelele ukuqhutywa kwezilingo ezifana nokwakhiwa kwethala leencwadi le-RNA kunye nokwandiswa kwe-RNA. I-Dithiothreitol (DTT) ikwasetyenziswa njengeyeza lokukhusela iiseli kunye nezicubu, njenge-radioprotectant, njl.
Nangona kunjalo, i-dithiothreitol (DTT) idla ngokungakwazi ukunciphisa iibhondi ze-disulfide ezikwisakhiwo seproteni (i-solvent ayifikeleleki). Ukunciphisa ezo bhondi ze-disulfide kudla ngokufuna ukuguquka kweproteni kuqala.
Ukuze kuthintelwe isiphumo se-shuttle seebhetri ze-lithium-sulfur kwaye kuphuculwe ukusebenza kwe-electrochemical kweebhetri ze-lithium-sulfur, zama ukusebenzisa i-dithiothreitol (DTT) njenge-arhente yokucheba ukuze kuchetywe ii-polysulfides eziphezulu ukuze zinganyibiliki. I-Threitol (DTT) ixutywe kwiphepha le-nanotubes ze-carbon ezinamadonga amaninzi (MWCNTs) ukulungiselela i-interlayer ye-DTT. I-interlayer ye-DTT ibekwe phakathi kwephepha le-electrode elihle kunye ne-separator yeqhosha le-lithium-sulfur iqhosha le-half-cell, kunye noxinano lomphezulu we-electrode elihle malunga ne-2mg/cm2. Iziphumo zokujonga ze-SEM ziqinisekisa ukuba i-DTT isasazeke ngokulinganayo kumphezulu kunye ne-voids yephepha le-MWCNTs. Iziphumo zovavanyo lwe-electrochemical zibonisa ukuba ibhetri ye-lithium-sulfur enesakhiwo sesandwich se-DTT inomthamo othile wokukhupha wokuqala we-1288 mAh/g ngesantya se-0.05C. Okokuqala ngqa, ukusebenza kakuhle kwe-coulombic kusondele kwi-100%, kwaye amandla athile ngexesha lokutshaja nokukhupha kwi-0.5C, 2C, kunye ne-4C afikelela kwi-650mAh/g, 600mAh/g, kunye ne-410mAh/g, ngokwahlukeneyo. Ukungeniswa kwesakhiwo sesandwich se-DTT kunokucheba ngempumelelo ii-polysulfides eziphezulu. Kuyithintela ekufudukeleni kwi-electrode ye-lithium negative, ngaloo ndlela kuthintela isiphumo se-shuttle kwaye kuphucule uzinzo lomjikelo kunye nokusebenza kakuhle kwe-coulomb yeebhetri ze-lithium-sulfur.
Kubalulekile ukuqaphela ukuba i-dithiothreitol (DTT) yinto enobuthi. Umzekelo, xa kukho iimetali eziguqukayo, i-dithiothreitol (DTT) inokubangela umonakalo we-oxidative kwiimolekyuli zebhayoloji. Kwangaxeshanye, i-dithiothreitol (DTT) ) Inganyusa ubuthi bezinye iikhompawundi eziqulethe i-arsenic kunye ne-mercury. I-Dithiothreitol (DTT) inevumba elimnandi, elinokuba yingozi kwimpilo ngenxa yokuphefumla kunye nokunxibelelana nolusu. Ke ngoko, kuyimfuneko ukuyikhusela ngexesha lokusebenza, ukunxiba iimaski, iiglavu kunye neeglasi, kunye nokusebenza kwindawo yokufutha.
I-Thithreitol (DTT) njengearhente yokucheba kwiibhetri ze-lithium-sulfur
Ibhetri yeLithium-sulfur ithathwa njengenkqubo yebhetri enamandla amakhulu ngenxa yobuninzi bayo bamandla kunye nokukhuselwa kwendalo. Nangona kunjalo, "isiphumo se-shuttle" se-polysulfides sikhokelela kubomi obubi bomjikelo kunye nokuzikhupha ngamandla, nto leyo ethintela ukusetyenziswa kwayo.
I-Thiothreitol (DTT) ingongezwa kwibhetri njenge-arhente yokucheba. Ingashenxisa ngokukhawuleza iibhondi ze-disulfide kubushushu begumbi, ishenxise ii-polysulfide eziphezulu ukuthintela ukunyibilika kwazo, ithintele isiphumo se-shuttle, kwaye yonyuse ukusebenza kwe-lithium ye-electrochemical yeebhetri zesalfure.
I-Dithiothreitol (DTT) njengesongezelelo se-electrolyte kwiibhetri ze-alkaline aluminium/air
Kwiibhetri ze-alkaline aluminium/air, i-dithiothreitol inokwenza umaleko okhuselayo ofanayo nozinzileyo ngokusebenzisa ii-dynamic covalent bonds kumphezulu we-aluminium anode, ithintele ukuzigqwala kwe-aluminium anode, kwaye iphucule ngokufanelekileyo ukusebenza kwayo.
Ixesha lokuthumela: Disemba-31-2021