Qhov sib txawv ntawm optical microscope thiab electron microscope
Ua ntej, lub teeb ci txawv
Optical microscope siv lub teeb pom kev zoo li lub teeb ci, thiab lub tshuab hluav taws xob siv hluav taws xob siv hluav taws xob ua lub teeb ci.
Qhov thib ob, lub hauv paus ntsiab lus imaging yog txawv.
Optical microscope siv geometrical optics imaging txoj cai rau cov duab. Electron microscope bombards tus qauv nto nrog high-zog electron beam, uas excites ntau lub cev lub cev cov cim rau ntawm tus qauv nto, thiab ces siv txawv teeb liab detectors kom tau txais lub cev cov cim qhia thiab hloov mus rau hauv cov ntaub ntawv duab.
Peb, qhov kev daws teeb meem txawv
Vim yog kev cuam tshuam thiab qhov sib txawv ntawm lub teeb, qhov kev daws teeb meem ntawm optical microscope tsuas yog txwv rau 0.2-0.5um. Vim tias lub tshuab ntsuas hluav taws xob siv hluav taws xob siv hluav taws xob ua lub teeb pom kev, nws qhov kev daws teeb meem tuaj yeem ncav cuag 1-3nm, yog li cov ntaub so ntswg soj ntsuam ntawm lub tshuab ntsuas qhov muag yog nyob rau hauv micron tsom, thiab cov ntaub so ntswg soj ntsuam ntawm electron microscope belongs rau nano tsom xam.
Plaub, qhov tob ntawm qhov chaw sib txawv
Feem ntau, qhov tob ntawm thaj chaw ntawm lub tshuab ntsuas qhov muag yog nyob nruab nrab ntawm 2-3um, yog li qhov kev ua kom zoo ntawm tus qauv yog qhov yuav tsum tau ua, yog li cov txheej txheem npaj cov qauv yog qhov nyuaj. Qhov tob ntawm daim teb ntawm electron microscope tuaj yeem siab txog li ob peb millimeters, yog li tsis muaj qhov yuav tsum tau ua rau qhov smoothness ntawm tus qauv saum npoo geometry, thiab cov qauv kev npaj yog qhov yooj yim. Qee cov qauv yuav luag tsis xav tau cov qauv npaj, txawm hais tias lub stereomicroscope kuj muaj qhov tob ntawm qhov loj.
Dab tsi yog qhov optical microscope pom?
1. Cov organelles uas pom tau nyob rau hauv lub optical microscope muaj xws li mitochondria, chloroplasts, vacuoles, nucleoli thiab lwm yam qauv uas loj tshaj 0.2 micron.
2. Cov organelles uas tuaj yeem pom nyob rau hauv lub tshuab ntsuas hluav taws xob yog: mitochondria, chloroplasts, Golgi lub cev, endoplasmic reticulum, centrosomes, lysosomes, vacuoles, ribosomes, peroxisomes, microbodies, kab mob plasmids, mitochondria cell, centrosomes, , lwm.
