Taw qhia txog yas Petri tais
A yas Petri phajyog ib qho ntiav, cylindrical, pob tshab ntim nrog lub hau xoob xoob, siv dav hauv cov chaw sim tshuaj lom neeg rau culturing microorganisms thiab hlwb. Nws yog qhov niaj hnub, cov khoom siv pov tseg rau cov iav qub uas tsim los ntawm Julius Richard Petri hauv xyoo 1887, thiab nws txoj kev saws me nyuam tau ua kom zoo dua qub thiab kev nyab xeeb.
Khoom siv thiab nta
Feem ntau cov yas Petri tais diav yog tsim los ntawm siab- zoopolystyrene (PE), ib yam khoom uas tau xaiv rau nws zoo heev optical clarity, uas tso cai rau cov kws tshawb fawb los soj ntsuam cov colony loj hlob thiab cellular cov ntsiab lus kom meej meej nyob rau hauv ib tug microscope. Rau cov ntawv thov uas xav tau tshuaj tiv thaiv ntau dua lossis rov siv dua, qee cov tais diav yog ua los ntawmpolypropylene (PP). Cov tais diav yog feem ntau90mm ibnyob rau hauv txoj kab uas hla, txawm tias lwm qhov ntau thiab tsawg xws li 35 hli, 60 hli, thiab 150 hli muaj rau ntau yam kev xav tau. Ib qho tseem ceeb tsim feature yog lub hau:ua pacov tais diav muaj cov ridges me uas tso cai rau kev sib pauv roj yam tseem ceeb (CO₂ thiab O₂) rau cov kab lis kev cai aerobic, thaumtsis yog - cuacov tais diav muab lub kaw ntom ntom kom txo cov dej evaporation thaum lub sij hawm ntev - incubation.
Qhov zoo tshaj iav
Yas muab ntau yam txiaj ntsig. Ua ntej- cov tais diav uas tsis muaj tshuaj tua kab mob tshem tawm qhov kev xav tau ntawm lub sijhawm- siv ntxhua khaub ncaws thiab autoclaving, txo cov kev pheej hmoo kis kab mob thiab cov nqi ua haujlwm. Tsis tas li ntawd, cov yas yog shatterproof, ua rau nws muaj kev nyab xeeb dua los tuav thiab thauj.
Cov ntawv thov tseem ceeb
Yas Petri cov tais diav yog qhov tseem ceeb hauv microbiology rau kev npaj cov phaj agar kom cais tawm, kab lis kev cai, thiab suav cov kab mob thiab cov kab mob los ntawm kev kuaj mob, zaub mov, lossis kev kuaj ib puag ncig. Lawv kuj tau siv dav hauv cov tsiaj txhu thiab cov nroj tsuag kab lis kev cai, nrog rau hauv kev sim tshuaj tiv thaiv kab mob, xws li Kirby-Bauer disk diffusion method.