Puas muaj peev xwm cais nitrogen-15 los ntawm kev siv roj centrifuge

Puas Siv Tau Gas Centrifuge Los Faib Nitrogen-15?

Kev Taw Qhia

Nitrogen, yog ib qho ntawm cov khoom muaj ntau tshaj plaws hauv huab cua, ua lub luag haujlwm tseem ceeb hauv ntau yam txheej txheem tshuaj lom neeg thiab tshuaj lom neeg. Ntawm nws cov isotopes, nitrogen-15 (N-15) tau txais kev saib xyuas ntau vim nws cov khoom tshwj xeeb thiab kev siv hauv kev tshawb fawb. Cov kws tshawb fawb tau tshawb nrhiav ntau txoj hauv kev los cais thiab sib sau ua ke N-15 rau ntau lub hom phiaj. Hauv tsab xov xwm no, peb nkag mus rau hauv qhov ua tau ntawm kev cais N-15 siv lub tshuab centrifuge roj, ib txoj hauv kev siv dav dav rau kev sib cais isotope. Peb kuj tham txog cov kev siv thiab cov txiaj ntsig ntawm kev tshawb fawb no hauv kev tshawb fawb.

1. Nkag Siab Txog Qhov Tseem Ceeb Ntawm Nitrogen-15 Isotope

Nitrogen-15, ib qho isotope ntawm nitrogen, txawv ntawm nitrogen-14 uas feem ntau pom vim muaj ib qho neutron ntxiv. Qhov sib txawv me me ntawm atomic mass no ua rau N-15 yog ib qho cuab yeej tseem ceeb hauv ntau yam kev tshawb fawb, suav nrog biology, chemistry, thiab kev tshawb fawb ib puag ncig. Cov kws tshawb fawb feem ntau siv N-15 ua ib qho tracer los kawm txog lub voj voog nitrogen, kev nqus cov as-ham hauv cov nroj tsuag, thiab cov chaw ua pa nitrogen. Txawm li cas los xij, qhov tsis txaus ntawm N-15 ua rau muaj kev cov nyom loj thaum sim tshuaj xyuas isotopic lossis ua cov kev sim uas xav tau cov concentration ntau dua.

2. Lub Luag Haujlwm ntawm Gas Centrifuge hauv Kev Sib Cais Isotope

Kev siv roj centrifugation yog kev sib cais cov isotopes raws li lawv qhov sib txawv ntawm qhov hnyav los ntawm lub zog centrifugal. Cov txheej txheem no tau ua pov thawj tias muaj kev vam meej zoo kawg nkaus hauv kev sib cais ntau yam isotopes, xws li uranium thiab carbon, rau kev tsim hluav taws xob nuclear thiab kev tshawb fawb biomedical, raws li. Vim muaj kev vam meej ntawm kev siv roj centrifugation hauv kev sib cais isotope, cov kws tshawb fawb tau tshawb nrhiav nws qhov kev siv tau rau kev sib cais N-15.

3. Cov Teeb Meem hauv Kev Sib Cais Nitrogen-15 Isotope

Txawm hais tias kev siv roj centrifugation tau ua pov thawj tias muaj txiaj ntsig zoo hauv kev sib cais cov isotopes tshwj xeeb, kev sib cais ntawm N-15 ua rau muaj kev cov nyom sib txawv vim nws cov khoom atomic. Nitrogen-15 tsuas yog 0.37% loj dua N-14, ua rau nws nyuaj rau kev sib cais tseem ceeb los ntawm cov txheej txheem roj centrifuge ib txwm muaj. Qhov xav tau kev ceev ceev thiab kev raug hauv cov txheej txheem sib cais ua rau nitro…