Video: NMR siv qhov twg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nuclear magnetic resonance spectroscopy yog dav siv los txiav txim cov qauv ntawm cov organic molecules nyob rau hauv kev daws thiab kawm molecular physics, crystals thiab non-crystalline cov ntaub ntawv. NMR tseem niaj hnub siv nyob rau hauv cov txheej txheem kho mob siab heev, xws li hauv magnetic resonance imaging (MRI).
Kuj nug, NMR siv rau dab tsi?
Nuclear Sib Nqus Resonance ( NMR ) spectroscopy yog ib qho txheej txheem analytical chemistry siv hauv kev tswj kom zoo thiab reserach rau kev txiav txim siab cov ntsiab lus thiab purity ntawm tus qauv raws li nws cov qauv molecular. Piv txwv li, NMR tuaj yeem txheeb xyuas cov khoom sib xyaw uas muaj cov khoom sib xyaw ua ke.
Kuj Paub, leej twg tsim NMR spectroscopy? Isidor Rau
NMR ua haujlwm li cas?
Nuclear magnetic resonance, NMR , yog lub cev tshwm sim ntawm resonance hloov pauv ntawm qib sib nqus zog, tshwm sim thaum atomic nuclei rau hauv ib qho chaw sib nqus sab nraud thiab siv hluav taws xob hluav taws xob nrog cov zaus tshwj xeeb. Los ntawm kev kuaj pom cov cim nqus, ib tus tuaj yeem tau txais NMR spectrum.
Puas yog NMR thiab MRI tib yam?
Sib nqus resonance imaging. MRI tsis koom nrog X-rays lossis kev siv hluav taws xob ionizing, uas txawv ntawm CT thiab PET scans. MRI yog ib daim ntawv thov kev kho mob ntawm nuclear magnetic resonance ( NMR ). NMR kuj tseem siv tau rau kev yees duab hauv lwm yam NMR kev siv, xws li NMR spectroscopy.
Pom zoo:
Qhov twg los thawj qhov ntev lossis qhov dav lossis qhov siab?
Dab tsi los ua ntej? Graphics 'kev lag luam tus qauv yog dav los ntawm qhov siab (dav x qhov siab). Txhais tau hais tias thaum koj sau koj qhov ntsuas, koj sau lawv los ntawm koj qhov kev xav, pib nrog qhov dav. Qhov ntawd tseem ceeb
Dab tsi yog qhov txawv ntawm qhov pom tseeb qhov loj thiab qhov ntsuas qhov ntsuas qhov tseeb?
Dab tsi yog qhov txawv ntawm qhov pom tseeb thiab qhov tseeb? Pom meej qhov loj npaum li cas yog qhov ci ntawm lub hnub qub tshwm los ntawm lub ntiaj teb thiab nyob ntawm qhov ci thiab qhov deb ntawm lub hnub qub. Qhov loj npaum li cas yog qhov ci ntawm lub hnub qub yuav tshwm sim los ntawm tus qauv nyob deb
Dab tsi yog qhov sib npaug siv los xam tag nrho cov khoom siv hluav taws xob siv?
Cov mis uas txuas lub zog thiab lub zog yog: Zog = Lub Zog x Sijhawm. Chav tsev ntawm lub zog yog joule, lub zog ntawm lub zog yog watt, thiab chav tsev ntawm lub sijhawm yog qhov thib ob
Qhov twg yog qhov cua sov los ntawm qhov uas ua rau qhov tam sim no convection hauv lub mantle?
Lub tshav kub uas tsav cov convection tam sim no nyob rau hauv lub mantle los ntawm lub hauv paus ntawm lub ntiaj teb
Thaum twg koj yuav tsum siv correlation thiab thaum twg koj yuav tsum siv yooj yim linear regression?
Regression feem ntau yog siv los tsim cov qauv / qhov sib npaug los kwv yees cov lus teb tseem ceeb, Y, los ntawm cov txheej txheem kwv yees (X) sib txawv. Kev sib raug zoo feem ntau yog siv los ua kom sai thiab ua kom luv luv cov kev taw qhia thiab lub zog ntawm kev sib raug zoo ntawm ib pawg ntawm 2 lossis ntau tus lej sib txawv