Video: TD ntawm lub pipette txhais li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
TC lub TD abbreviated rau "kom muaj" thiab "xa" feem. Hauv 'TC' cim pib , cov khoom ntim ntawm cov kua sib raug rau lub peev xwm luam tawm ntawm lub pib , Thaum nyob hauv ' TD ' cim pib , tus xa khoom kom muaj nuj nqis sib raug rau lub peev xwm luam tawm ntawm pib.
Tsuas yog li ntawd, qhov txawv ntawm TD thiab TC yog dab tsi?
Ib tug pipette yog calibrated rau " TC "los yog" TD ” thiab cov ntawv luv yog ib txwm luam tawm ntawm sab lossis lub teeb ntawm lub pipette. TD pipettes muaj ntau ntau tshaj li TC pib. Feem ntau cov kawm tiav pipettes los yog noob pipettes feem ntau calibrated kom xa ( TD ), hos capillary pipettes raug kho kom muaj ( TC ).
Ib yam li ntawd, vim li cas nws tseem ceeb uas yuav tsum tso cov kua dej tawm ntawm lub pipette cim TD? Cov cim ntawm TD ("xa"), lossis EX, txhais tau hais tias qhov ntim tau teev tseg yog tus nqi ntawm cov tshuaj uas yuav ntws tawm ntawm pib , uas tej zaum yuav tsawg dua li tag nrho cov nyiaj uas tam sim no vim qhov seem kua dej uas adheres rau phab ntsa ntawm cov khoom siv.
Cov lus nug tseem yog, dab tsi yog kom muaj pipette?
Mohr pipets yog TC = to muaj . Cov kav dej no tau tsim los txhawm rau txhawm rau ntsuas qhov ntim kom raug, yog li yuav muaj ib feeb ntawm cov kua tso rau hauv lub taub.
Puas yog TC lossis TD?
Calibrated pipets, burets, syringes thiab droppers yog T. D . iav; volumetric flasks thiab cylindrical los yog conical kawm tiav T. C . Erlenmeyer khob dej, beakers , thiab cov fwj tshuaj, tsis hais cov cim, tsis yog ntim cov iav ntim, tab sis tsuas yog cov thawv ntim rau khaws cia thiab sib tov kua.
Pom zoo:
Lub luag haujlwm ntawm CDK yog dab tsi hauv lub cev ua haujlwm ntawm tes tshwj xeeb hauv lub voj voog ntawm tes?
Los ntawm phosphorylation, Cdks teeb liab lub xov tooj ntawm tes uas nws tau npaj kom dhau mus rau theem tom ntej ntawm lub voj voog ntawm tes. Raws li lawv lub npe qhia, Cyclin-Dependent Protein Kinases yog nyob ntawm cyclins, lwm chav kawm ntawm kev tswj hwm cov protein. Cyclins khi rau Cdks, ua kom cov Cdks rau phosphorylate lwm cov molecules
Qhov twg yog qhov tseeb dua qhov hloov pauv pipette lossis ntsuas pipette?
Kawm tiav pipettes yog tsawg dua li volumetric pipettes. Mohr kawm tiav pipettes, uas yog qee zaum hu ua "drain out pipettes", tau cim nrog xoom thaum pib ntawm lawv qhov kawg conical, thaum Serological kawm tiav pipettes, tseem hu ua "tsov tawm pipettes", tsis txhob tso cov cim xoom
Yuav ua li cas lub abundance ntawm lub ntiaj teb no piv nrog cov abundance ntawm lub ntsiab nyob rau hauv tib neeg?
Oxygen yog cov khoom muaj ntau tshaj plaws hauv ntiaj teb thiab hauv tib neeg. Kev nplua nuj ntawm cov ntsiab lus uas tsim cov organic tebchaw nce hauv tib neeg thaum qhov kev nplua nuj ntawm metalloids nce hauv ntiaj teb. Cov ntsiab lus uas muaj ntau hauv ntiaj teb yog qhov tseem ceeb los txhawb txoj sia
Lub ntsiab txhais twg yog Bronsted Lowry txhais ntawm lub hauv paus?
Bronsted-Lowry acid yog ib hom tshuaj uas pub ib los yog ntau dua hydrogen ions hauv cov tshuaj tiv thaiv. Hauv qhov sib piv, Bronsted-Lowry puag txais hydrogen ions. Thaum nws pub nws cov proton, cov kua qaub ua nws lub hauv paus conjugate. Ib qho kev saib ntau dua ntawm txoj kev xav yog cov kua qaub ua tus neeg pub khoom noj proton thiab lub hauv paus ua tus txais proton
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua