Qhov Tseem Ceeb - ESR vs NMR vs MRI
Spectroscopy yog cov txheej txheem kom muaj nuj nqis siv los txheeb xyuas cov organic tebchaw thiab txhawm rau txheeb xyuas lawv cov qauv thiab qhia qhov sib xyaw ua ke raws li nws cov khoom. Nws kawm seb cov hluav taws xob tawg tau tawg ntawm qhov chaw tawm tsam thiab cuam tshuam nrog cov teeb meem. Hom hluav taws xob siv nyob rau hauv cov txheej txheem spectroscopic yuav txawv ntawm lub teeb pom kev mus rau hluav taws xob electromagnetic. Qhov teeb meem ntawm qhov kev tshuaj ntsuam spectroscopic ua tau kuj txawv. Nyob ntawm seb hom teeb meem twg cuam tshuam nrog hluav taws xob, tuaj yeem muaj ob txoj hauv kev tseem ceeb - ESR thiab NMR. Electron Spin Resonance spectroscopy (ESR) txheeb xyuas cov nqi hluav taws xob hauv ib lub molecule thiab Nuclear Magnetic Resonance spectroscopy (NMR) siv lub hauv paus ntsiab lus ntawm nuclear tawg thaum raug hluav taws xob. Sib Nqus Resonance Imaging (MRI) yog ib daim ntawv ntawm NMR thiab cov txheej txheem imaging siv los txiav txim cov qauv thiab cov duab ntawm lub cev thiab cov hlwb siv qhov siv ntawm cov hluav taws xob emission. Qhov no yog qhov txawv ntawm ESR, NMR thiab MRI.
ESR yog dab tsi?
Electron Spin Resonance (ESR) Spectroscopy feem ntau yog raws li kev tawg ntawm microwave hluav taws xob thaum raug rau ib qho hluav taws xob tsis sib xws hauv thaj chaw muaj zog sib nqus. Yog li, cov kab mob hauv nruab nrog cev lossis cov hlwb uas tsis muaj kev sib koom ua ke, cov khoom siv hluav taws xob zoo heev xws li cov dawb radicals tuaj yeem tshawb pom siv cov txheej txheem no. Yog li, cov txheej txheem no muab cov ntaub ntawv tseem ceeb thiab cov qauv ntawm cov molecules thiab tuaj yeem siv los ua ib txoj hauv kev tsom xam los txiav cov ntaub ntawv ntawm cov molecules, crystals, ligands hauv electron thauj thiab cov txheej txheem tshuaj lom neeg.
Daim duab 01: ESR Spectrometer
Nyob rau hauv ESR, thaum lub molecule raug rau magnetic teb, lub zog ntawm lub molecule yuav phua mus rau ntau lub zog theem thiab ib zaug lub unpaired electron tam sim no nyob rau hauv lub molecule absorbs lub zog ntawm hluav taws xob, lub electron pib tig., thiab cov spinning electrons tsis muaj zog cuam tshuam nrog ib leeg. Cov cim nqus nqus tau ntsuas los ntsuas tus cwj pwm ntawm cov electrons.
NMR yog dab tsi?
Nuclear Magnetic Resonance (NMR) Spectroscopy yog ib qho kev siv dav tshaj plaws hauv biochemistry thiab radiobiology. Nyob rau hauv cov txheej txheem no, them nuclei yog lub hom phiaj cov khoom ntawm ib tug molecule thiab nws excitation thaum raug hluav taws xob yog ntsuas nyob rau hauv ib tug magnetic teb. Qhov zaus ntawm cov hluav taws xob absorbed generates ib spectrum thiab cov quantification thiab cov qauv kev soj ntsuam ntawm cov molecule tshwj xeeb los yog lub cev yuav ua tau.
Daim duab 02: NMR Spectrum
Radiation siv nyob rau hauv feem ntau NMR nrhiav pom yog gamma hluav taws xob vim nws yog lub zog siab uas tsis yog-ionizing hluav taws xob. Lub spinning ntawm lub nuclei nyob rau hauv magnetic teb tshwm sim nyob rau hauv ob lub xeev spin: zoo spin thiab tsis zoo spin. Qhov zoo spin generates ib magnetic teb opposite rau sab nraud magnetic teb whereas qhov tsis zoo spin generates ib magnetic teb nyob rau hauv cov kev taw qhia ntawm sab nraud magnetic teb. Lub zog sib txawv raws li qhov no yuav nqus cov hluav taws xob sab nraud thiab ua rau lub spectrum.
MRI yog dab tsi?
Magnetic Resonance Imaging (MRI) yog ib daim ntawv ntawm NMR, qhov kev siv ntawm cov hluav taws xob nqus tau siv los tsim cov duab ntawm lub cev thiab cov qauv ntawm tes. Qhov no yog cov txheej txheem uas tsis muaj kev cuam tshuam thiab tsis siv cov hluav taws xob puas tsuaj rau kev kuaj pom. Txhawm rau kom tau txais MRI, tus neeg mob tau khaws cia hauv chav sib nqus thiab raug kho ua ntej nrog cov neeg ua haujlwm sib txawv hauv cov hlab ntsha kom thiaj li tau txais cov duab kom meej.
Daim duab 03: MRI
Dab tsi zoo sib xws ntawm ESR NMR thiab MRI?
- ESR, NMR thiab MRI siv cov hlau nplaum.
- Nyob rau hauv tag nrho peb txoj kev, kev tawg ntawm cov teeb meem yog ua los ntawm hluav taws xob; pom lub teeb lossis hluav taws xob hluav taws xob.
- Txhua yam yog cov txheej txheem tsis cuam tshuam.
- Tag nrho peb cov tswv yim yog ua raws li qhov kev xav ntawm cov teeb meem hauv qhov chaw sib nqus.
- Cov tswv yim no yog siv rau hauv kev kuaj mob thiab kev tshuaj xyuas cov khoom nruab nrog cev thiab cov hlwb.
Qhov txawv ntawm ESR NMR thiab MRI yog dab tsi?
ESR NMR vs MRI |
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| Definition | |
| ESR | Electron Spin Resonance (ESR) Spectroscopy yog cov txheej txheem uas siv spinning ntawm ib qho hluav taws xob tsis sib xws uas yog nyob rau hauv resonance thiab tsim cov spectrum raws li kev nqus ntawm hluav taws xob. |
| NMR | Nuclear Magnetic Resonance (NMR) Spectroscopy yog qhov resonance uas tshwm sim thaum lub nucleus raug them rau hauv qhov chaw sib nqus thiab yog 'swept' los ntawm lub xov tooj cua zaus uas ua rau lub nuclei 'flip'. Qhov zaus no yog ntsuas los ua ib qho spectrum. |
| MRI | Magnetic Resonance Imaging (MRI) yog daim ntawv thov ntawm NMR, qhov kev siv hluav taws xob siv los ntes cov duab ntawm lub cev hauv lub cev. |
| Yam hluav taws xob | |
| ESR | ESR feem ntau siv microwaves. |
| NMR | NMR siv xov tooj cua. |
| MRI | MRI siv hluav taws xob hluav taws xob xws li gamma rays. |
| Tseem Muaj Teeb Meem Lub Hom Phiaj | |
| EST | EST lub hom phiaj uas tsis muaj hluav taws xob tsis sib xws, dawb radicals. |
| NMR | NMR lub hom phiaj raug nqi nuclei. |
| MRI | MRI lub hom phiaj them cov nuclei. |
| Kev tsim tawm | |
| EST | ESR tsim ib qho kev nqus spectrum. |
| NMR | NMR kuj tsim qhov nqus spectrum. |
| MRI | MRI tsim cov duab ntawm lub cev, hlwb. |
Summary – ESR vs NMR vs MRI
Spectroscopic cov tswv yim tau siv dav hauv kev tshuaj xyuas biochemical ntawm cov molecules, cov tebchaw, cov hlwb thiab cov kabmob, tshwj xeeb tshaj yog hauv kev tshawb nrhiav cov hlwb tshiab thiab cov hlwb tsis zoo hauv lub cev thiab yog li qhia lawv lub cev. Yog li, peb cov txheej txheem; ESR, NMR thiab MRI yog qhov tseem ceeb heev vim lawv tsis yog cov txheej txheem spectroscopic siv rau kev txhais lus zoo thiab ntau ntawm biomolecules. Qhov sib txawv tseem ceeb ntawm ESR NMR thiab MRI yog hom hluav taws xob uas lawv siv thiab hom teeb meem lawv tsom.
Download PDF Version of ESR vs NMR vs MRI
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li cov ntawv sau tseg. Thov download PDF version ntawm no Qhov txawv ntawm ESR, NMR thiab MRI.
