Dithiothreitol (DTT), CAS: 3483-12-3, ua ib qho tshuaj siv dav hauv kev tshawb fawb, feem ntau siv ua tus neeg sawv cev txo qis rau sulfhydryl DNA, tus neeg sawv cev tiv thaiv, thiab txo cov disulfide bonds hauv cov protein. Ib hom tshuaj ntsuab tshiab ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm ntawm lub roj teeb.
Dithiothreitol (DTT) yog ib qho tshuaj uas muaj zog heev, thiab nws qhov kev txo qis yog vim muaj kev ruaj khov ntawm lub nplhaib rau-tus tswv cuab (muaj cov disulfide bonds) hauv nws lub xeev oxidation. Kev txo qis ntawm cov disulfide bond ib txwm muaj los ntawm dithiothreitol muaj ob qhov kev sib pauv sulfhydryl-disulfide bond sib law liag. Lub zog txo qis ntawm dithiothreitol (DTT) raug cuam tshuam los ntawm tus nqi pH, thiab nws tsuas yog ua si qhov cuam tshuam txo qis thaum tus nqi pH ntau dua 7. Qhov no yog vim tsuas yog cov deprotonated thiolate anions ua haujlwm, thaum mercaptans tsis ua, thiab pKa ntawm mercapto pawg feem ntau yog 8.3.
Dithiothreitol (DTT) feem ntau yog siv los txo cov disulfide bonds ntawm cov protein molecules thiab polypeptides. Nws feem ntau yog siv los ua tus neeg sawv cev tiv thaiv protein sulfhydryl thiab siv rau hauv kev npaj tshuaj tiv thaiv kom tiv thaiv cov protein cysteine residues los ntawm kev tsim cov intramolecular thiab intermolecular disulfides. Qhov tseem ceeb. Hauv cov txheej txheem ntawm kev kuaj pom nucleic acid, dithiothreitol (DTT) tuaj yeem rhuav tshem cov disulfide bonds hauv RNase protein, ua rau RNase puas tsuaj, thiab pab txhawb kev ua cov kev sim xws li kev tsim RNA tsev qiv ntawv thiab RNA amplification. Dithiothreitol (DTT) kuj tseem siv los ua tshuaj tua kab mob los tiv thaiv cov hlwb thiab cov ntaub so ntswg, ua tus tiv thaiv radioprotectant, thiab lwm yam.
Txawm li cas los xij, dithiothreitol (DTT) feem ntau tsis tuaj yeem txo cov disulfide bonds uas nyob hauv cov qauv protein (cov kuab tshuaj tsis tuaj yeem nkag mus tau). Kev txo cov disulfide bonds no feem ntau xav tau denaturation ntawm cov protein ua ntej.
Yuav kom tiv thaiv tau qhov cuam tshuam ntawm cov roj teeb lithium-sulfur thiab txhim kho kev ua haujlwm electrochemical ntawm cov roj teeb lithium-sulfur, sim siv dithiothreitol (DTT) ua tus neeg sawv cev txiav kom txiav cov polysulfides siab kom tiv thaiv lawv kom tsis txhob yaj. Threitol (DTT) raug sib xyaw rau hauv daim ntawv ntau-walled carbon nanotubes (MWCNTs) los npaj ib txheej DTT. Txheej DTT muab tso rau ntawm daim ntawv electrode zoo thiab lub separator ntawm lub lithium-sulfur khawm ib nrab-cell, thiab qhov ceev ntawm cov sulfur ntawm daim ntawv electrode zoo yog li 2mg/cm2. Cov txiaj ntsig soj ntsuam SEM lees paub tias DTT tau sib npaug ntawm qhov chaw thiab qhov khoob ntawm daim ntawv MWCNTs. Cov txiaj ntsig xeem electrochemical qhia tau tias lub roj teeb lithium-sulfur nrog DTT sandwich qauv muaj peev xwm tso tawm thawj zaug ntawm 1288 mAh/g ntawm tus nqi ntawm 0.05C. Thawj zaug, qhov ua tau zoo ntawm coulombic yog ze li ntawm 100%, thiab lub peev xwm tshwj xeeb thaum lub sijhawm them thiab tso tawm ntawm 0.5C, 2C, thiab 4C tus nqi ncav cuag 650mAh / g, 600mAh / g, thiab 410mAh / g, raws li. Kev qhia txog DTT sandwich qauv tuaj yeem ua tau zoo shear high-order polysulfides. Nws tiv thaiv nws los ntawm kev tsiv mus rau lithium negative electrode, yog li inhibiting lub shuttle nyhuv thiab txhim kho lub voj voog ruaj khov thiab coulomb efficiency ntawm lithium-sulfur roj teeb.
Nws yog ib qho tsim nyog sau tseg tias dithiothreitol (DTT) yog ib yam tshuaj lom. Piv txwv li, nyob rau hauv qhov muaj cov hlau hloov pauv, dithiothreitol (DTT) tuaj yeem ua rau muaj kev puas tsuaj rau cov tshuaj lom neeg. Tib lub sijhawm, dithiothreitol (DTT) kuj tseem tuaj yeem ua rau muaj kev lom ntawm qee cov tshuaj uas muaj arsenic thiab mercury. Dithiothreitol (DTT) muaj ntxhiab tsw qab, uas tuaj yeem ua rau muaj kev phom sij rau kev noj qab haus huv vim yog kev ua pa thiab kev sib cuag ntawm daim tawv nqaij. Yog li ntawd, nws yog ib qho tsim nyog los tiv thaiv nws thaum lub sijhawm ua haujlwm, hnav lub ntsej muag, hnab looj tes thiab tsom iav, thiab ua haujlwm hauv lub qhov cua.
Thithreitol (DTT) ua tus neeg sawv cev txiav hauv cov roj teeb lithium-sulfur
Lub roj teeb Lithium-sulfur raug suav hais tias yog lub roj teeb uas muaj peev xwm loj vim nws lub zog ceev ceev thiab kev tiv thaiv ib puag ncig. Txawm li cas los xij, "qhov cuam tshuam ntawm lub tsheb thauj khoom" ntawm polysulfides ua rau lub neej voj voog tsis zoo thiab kev tso tawm tus kheej loj heev, uas txwv nws daim ntawv thov. Yog vim li cas.
Thiothreitol (DTT) tuaj yeem ntxiv rau hauv lub roj teeb ua tus neeg sawv cev txiav. Nws tuaj yeem txiav cov disulfide bonds sai sai ntawm chav tsev kub, txiav cov polysulfides siab kom tiv thaiv lawv cov yaj, tiv thaiv cov nyhuv shutdown, thiab ua kom lithium Cov kev ua haujlwm electrochemical ntawm cov roj teeb sulfur nce ntxiv.
Dithiothreitol (DTT) ua ib qho electrolyte additive hauv alkaline txhuas/cua roj teeb
Hauv cov roj teeb alkaline txhuas/cua, dithiothreitol tuaj yeem tsim ib txheej tiv thaiv zoo ib yam thiab ruaj khov los ntawm cov dynamic covalent bonds ntawm qhov chaw ntawm txhuas anode, tiv thaiv kev xeb ntawm tus kheej ntawm txhuas anode, thiab txhim kho nws cov kev ua tau zoo.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-31-2021