Lub teeb lossis electron microscope twg muaj zog dua?
Nrog rau txoj kev loj hlob sai ntawm kev tshawb fawb thiab thev naus laus zis, daim ntawv thov kev cia siab ntawm electron microscopy hauv thaj chaw ntawm microscopy yog qhov dav heev, ua kom pom nws qhov tshwj xeeb zoo tshaj qhov kho qhov muag microscopy. Txawm li cas los xij, vim muaj cov thev naus laus zis sib txawv thiab thaj chaw ntawm kev siv ntawm optical microscopes thiab electron microscopes, electron microscopes tsis tuaj yeem hloov kho qhov muag microscopes.
Hais txog kev siv tshuaj lom neeg, qhov kev daws teeb meem ntawm optical microscopes yog qhov qis dua li ntawm electron microscopes, vim hais tias qhov kev daws teeb meem ntawm optical microscopes raug txwv los ntawm kev txwv diffraction, yog li nws qhov kev daws teeb meem tsis tuaj yeem tsawg dua li ib nrab ntawm lub teeb ntawm lub teeb. Qhov ntawd yog hais tias, yog tias 400nm teeb pom kev zoo siv, cov khoom pom tsis tuaj yeem tsawg dua 200nm. Txawm li cas los xij, vim nws muaj peev xwm ua tau raws sijhawm thiab kev soj ntsuam zoo, nws txoj haujlwm hauv biology yog qhov tsis sib xws. Nws yog tsis yooj yim sua kom tawm ntawm optical microscopes xws li fluorescence microscopy thiab confocal microscopy nyob rau hauv lub teb ntawm biology. Vim yog siv cov kab hluav taws xob rau kev soj ntsuam thiab ntsuas, electron microscopes tau yooj yim ua tiav nanometer daws teeb meem, uas yog irreplaceable rau high-resolution imaging daim ntaub ntawv.
Nyob rau hauv cov nqe lus ntawm daim ntawv thov nyob rau hauv metallographic tsom xam, lub magnification ntawm electron microscopes deb tshaj ntawm optical microscopes. Qhov siab tshaj plaws magnification ntawm niaj hnub electron microscopes tau tshaj 3 lab lub sij hawm, thaum lub siab tshaj plaws magnification ntawm optical microscopes yog hais txog 2000 zaug. Yog li, electron microscopes tuaj yeem ncaj qha saib xyuas cov txheej txheem atomic lattice hauv cov atoms thiab cov muaju ntawm qee cov hlau hnyav.
Dab tsi tuaj yeem optical microscopes thiab electron microscopes pom
Nyob rau hauv lub tshuab kho qhov muag: chloroplasts thiab vacuoles, cell phab ntsa thiab daim nyias nyias tuaj yeem pom los ntawm kev sib cais cytoplasmic, thiab chromosomes thiab mitochondria tuaj yeem pom los ntawm staining nrog dyes (Jiana Green)
Nyob rau hauv lub tshuab hluav taws xob hluav taws xob, tag nrho cov txheej txheem me me tuaj yeem pom, thiab tag nrho cov qauv hauv cov qauv ntawm cov qauv duab uas tshwm nyob rau hauv cov ntawv kawm hauv tsev kawm theem siab yuav raug pom. Xws li phospholipid bilayers thiab cov proteins ntawm cov cell membrane, ntau yam organelles nyob rau hauv cytoplasm, thiab nucleoli, nuclear membranes, nuclear pores, thiab lwm yam nyob rau hauv lub nucleus.
