Cov txheej txheem:
- Dab tsi yog cov txheej txheem sib txawv ntau tshaj plaws siv hauv microbiology?
- Lub hom phiaj tseem ceeb ntawm kev siv cov txheej txheem sib txawv yog dab tsi?
- Dab tsi yog cov kauj ruam tseem ceeb ntawm txoj kev sib txawv ntawm qhov sib txawv?
- Dab tsi yog cov txheej txheem staining?
Video: Nyob rau hauv cov txheej txheem staining txawv?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Thawj lub hlwb yog stained nrog crystal violet, ua raws li kev sib ntxiv ntawm tus neeg sawv cev rau qhov stain (iodine). Tom qab ntawd cawv yog siv, uas xaiv tshem tawm cov stain los ntawm tsuas yog Gram tsis zoo hlwb. Thaum kawg, qhov thib ob stains, safranin, yog ntxiv, uas tiv thaiv cov hlwb decolorized liab.
Dab tsi yog cov txheej txheem sib txawv ntau tshaj plaws siv hauv microbiology?
Gram stain yog txheej txheem staining tseem ceeb tshaj plaws hauv microbiology. Nws yog siv los sib txawv ntawm cov kab mob gram zoo thiab cov kab mob gram tsis zoo. Li no, nws yog qhov txawv txav.
Lub hom phiaj tseem ceeb ntawm kev siv cov txheej txheem sib txawv yog dab tsi?
Differential staining yog txheej txheem ua kom zoo dua ntawm qhov sib txawv ntawm lub cev thiab tshuaj lom neeg ntawm ntau pawg kab mob. Nws tso cai rau peb sib txawv ntawm ntau hom kab mob los yog sib txawv ntawm cov kab mob ntawm tes.
Dab tsi yog cov kauj ruam tseem ceeb ntawm txoj kev sib txawv ntawm qhov sib txawv?
Qhov kev ua tau zoo ntawm Gram Stain ntawm ib qho qauv yuav tsum muaj plaub kauj ruam yooj yim uas suav nrog kev siv lub hauv paus stain (crystal violet) rau cov smear kho cua sov, ua raws li kev sib ntxiv ntawm mordant (Gram's Iodine), tshem tawm sai sai nrog cawv, acetone, lossis sib xyaw ntawm cawv thiab acetone thiab kawg, counterstaining nrog …
Dab tsi yog cov txheej txheem staining?
Differential staining techniques nquag siv hauv chaw kho mob suav nrog Gram staining, acid-ceev staining, endospore staining, flagella staining, thiab capsule staining.
Pom zoo:
Nyob rau hauv cov txheej txheem nitriding cov nh3 roj tau qhia ntawm?
diffused rau hauv steel2). Txij li thaum ob qho kev cuam tshuam saum toj no tshwm sim ib txhij hauv furnace, NH3 tau qhia tas li nyob rau hauv lub qhov cub kom cov cua nitriding uas muaj NH3 tswj kom muab nitrogen rau cov hlau . Cov roj twg siv rau hauv cov txheej txheem nitriding?
Dab tsi yog cov xwm txheej rau txheej txheem haber?
Cua yog 78 feem pua nitrogen thiab yuav luag tag nrho cov seem yog oxygen. Thaum hydrogen hlawv hauv huab cua, cov pa oxygen ua ke nrog hydrogen - tawm hauv nitrogen tom qab. a qhov kub siab - txog 450 ° C a siab siab - txog 200 cua(200 npaug li qub siab) Vim li cas cov xwm txheej siv hauv Haber txheej txheem?
Cov txheej txheem twg yog txheej txheem gradational?
Gradational processes Weathering=breakdown of material in place Gradation=leveling of land degradation (erosion)=tshem tawm highs transport=txav ntawm cov khoom aggradation (deposition)=filling in lows Tectonic txheej txheem tsim los ntawm roughen lub ntiaj teb Gradational rog theem tawm highs thiab sau nyob rau hauv lows … Qhov twg ntawm cov txheej txheem hauv qab no yog cov txheej txheem gradational?
Nyob rau hauv tus txheej txheem desalination twg ntawm cov hauv qab no yog tshem tawm ntawm dej?
Desalination yog ib txheej txheem uas tshem tawm ntsev ntau dhau thiab lwm yam minerals tawm ntawm dej. Nyob rau hauv feem ntau cov txheej txheem desalination, pub dej yog kho thiab ob kwj dej yog tsim: kho cov dej tshiab uas muaj tsawg concentrations ntawm ntsev thiab minerals .
Puas yog txheej txheej txheej txheem siv los siv?
Kev txhim kho lub koom haum (OD) yog txheej txheej txheej txheem rau kev siv cov kev npaj hloov pauv kom ua rau tib neeg thiab cov koom haum ua tau zoo . Puas yog ib qho kev coj cwj pwm teb rau qhov tiag? Kev coj cwj pwm ntawm qhov kev xav ntawm kev xav yog qhov qhia tau tseeb ntawm kev xav.
