Koj puas tuaj yeem cais h2o los ntawm d2o nrog centrifuge
Kev Taw Qhia
Dej, cov tshuaj sib xyaw ua ke ntawm ob lub hydrogen atoms thiab ib lub oxygen atom (H2O), yog ib yam khoom tseem ceeb uas tseem ceeb rau lub neej hauv ntiaj teb. Txawm li cas los xij, zoo li ntau yam khoom, dej tuaj yeem muaj nyob rau hauv ntau hom isotopic. Ib hom zoo li no hu ua dej hnyav, lossis deuterium oxide (D2O), uas muaj cov hydrogen isotope hu ua deuterium. Txawm hais tias ob qho tib si H2O thiab D2O muaj cov yam ntxwv zoo sib xws, muaj qee qhov xwm txheej uas nws tsim nyog los cais cov isotopes no. Hauv tsab xov xwm no, peb tshawb nrhiav seb puas muaj peev xwm cais H2O ntawm D2O siv lub centrifuge, ib lub cuab yeej siv feem ntau hauv ntau qhov chaw ntawm kev tshawb fawb thiab kev lag luam.
Isotopes thiab lawv qhov tseem ceeb hauv dej
Ua ntej peb yuav tham txog cov ntsiab lus no, cia peb xub nkag siab txog cov isotopes thiab lawv qhov cuam tshuam rau dej. Cov isotopes yog cov atoms ntawm tib lub ntsiab lus nrog cov lej sib txawv ntawm neutrons hauv lawv lub nucleus, ua rau muaj kev hloov pauv ntawm qhov hnyav ntawm atomic. Piv txwv li, hom hydrogen feem ntau muaj ib qho proton thiab tsis muaj neutrons, thaum deuterium muaj ib qho neutron ntxiv rau proton. Kev hloov pauv ntawm qhov hnyav los ntawm qhov muaj cov isotopes sib txawv tuaj yeem cuam tshuam rau cov khoom siv lub cev thiab tshuaj ntawm cov tshuaj, suav nrog dej.
Cov yam ntxwv ntawm H2O thiab D2O
Nyob rau saum npoo av, tsis muaj qhov sib txawv me ntsis ntawm dej ib txwm (H2O) thiab dej hnyav (D2O). Ob qho tib si muaj cov yam ntxwv zoo sib xws xws li qhov kub npau, qhov ceev, thiab qhov khov, ua rau nws nyuaj rau cais ob qho tib si siv cov txheej txheem ib txwm muaj. Txawm li cas los xij, cov kws tshawb fawb tau tsim cov txheej txheem tshwj xeeb los cais cov isotopes dej tshwj xeeb rau ntau yam kev siv.
Lub luag haujlwm ntawm centrifugation hauv kev sib cais isotope
Kev centrifugation yog ib qho txheej txheem uas tuaj yeem cais cov tshuaj raws li lawv qhov sib txawv ntawm qhov ceev. Nws cuam tshuam nrog kev sib xyaw ua ke ntawm qhov ceev ceev, ua rau cov khoom me me ntau dua txav mus rau sab nraud thaum cov khoom me me dua tseem nyob ze rau hauv nruab nrab. Lub hauv paus ntsiab lus no yog lub hauv paus rau ntau qhov kev sib cais hauv chaw kuaj mob thiab kev lag luam.
Centrifugation rau kev sib cais cov isotopes dej
Txawm hais tias centrifugation yog ib txoj kev sib cais uas siv dav dav, nws muaj teeb meem thaum nws los txog rau kev sib cais cov isotopes dej. Tsis zoo li ntau lwm cov tshuaj, qhov sib txawv ntawm qhov hnyav ntawm H2O thiab D2O yog qhov tsawg heev, ua rau nws nyuaj rau kev sib cais zoo los ntawm cov txheej txheem centrifugation ib txwm muaj. Txawm li cas los xij, kev nce qib hauv thev naus laus zis centrifugal tau qhib cov cib fim rau kev ua tiav kev sib cais isotopic.
Cov kev tsim kho tshiab hauv kev sib cais isotope dej centrifugal
Cov kev tshawb fawb tsis ntev los no tau tshawb nrhiav cov txheej txheem tshiab los cais cov isotopes dej siv cov txheej txheem centrifugation siab heev. Ib txoj kev zoo li no suav nrog kev siv ultracentrifuges, uas ua haujlwm ntawm qhov ceev ceev heev, tsim cov zog centrifugal loj heev. Cov zog no tuaj yeem ua rau muaj qhov sib txawv me ntsis hauv cov nqi sedimentation ntawm H2O thiab D2O, uas ua rau muaj kev sib cais.
Xaus lus
Kev sib cais ntawm H2O thiab D2O tseem yog ib qho kev sib tw tseem ceeb vim lawv cov khoom zoo sib xws. Txawm hais tias cov txheej txheem centrifugation ib txwm muaj tej zaum yuav tsis txaus rau kev sib cais zoo, kev nce qib tsis ntev los no hauv kev siv tshuab ultracentrifugation muab cov peev xwm zoo. Kev tshawb fawb thiab kev txhim kho ntxiv hauv daim teb no yuav ua rau muaj kev tawg hauv kev sib cais zoo ntawm cov dej isotopes, ua rau lawv siv tau tshwj xeeb hauv ntau yam lag luam, suav nrog lub zog nuclear, tshuaj, thiab kev tshawb fawb.
.