Video: Thaum ua qhov tshuaj ntsuam xiav dawb cov kab mob hauv cov kab mob muaj?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Conversely, cov dawb colonies tsis tuaj yeem hloov pauv X-Gal los tsim cov tshuaj xiav xim, vim tias lawv tsis tsim cov kev ua haujlwm β-galactosidase tom qab noj plasmid nqa cov DNA tso thiab cuam tshuam rau lacZ α noob. Cov no dawb colonies muaj tus recombinant kab mob thiab yuav tsum tau xaiv (Daim duab 1).
Ua li no, puas yog txhua pawg neeg dawb thiab xiav muaj plasmid?
Cov xiav colonies muaj "self" religated plasmids tias ua tsis muaj DNA nkag mus cuam tshuam rau lac Z gene. Dawb colonies muaj cov kab mob uas nqa plasmids uas muaj DNA ntxig cov khoom uas cuam tshuam cov lac Z gene. Kev xaiv yuav ua tiav ntawm ampicillin muaj nruab nrab
Ib yam li ntawd, lub hom phiaj ntawm kev tshuaj ntsuam xiav dawb yog dab tsi? Cov xiav – dawb screen yog a tshuaj ntsuam cov txheej txheem uas tso cai rau kev txheeb xyuas sai thiab yooj yim ntawm cov kab mob recombinant hauv vector-based molecular cloning thwmsim. DNA ntawm kev txaus siab yog ligated rau hauv vector.
Xav txog qhov no, qhov kev tshuaj ntsuam xiav dawb pawg neeg dawb yog dab tsi?
Cov xiav - dawb screen yog a kev tshuaj ntsuam cov txheej txheem uas tso cai rau kev tshawb pom ntawm kev vam meej ligations hauv vector-based gene cloning. DNA ntawm kev txaus siab tau txuas rau hauv vector. Yog tias ligation tau ua tiav, cov kab mob pawg yuav yog dawb ; yog tsis yog, cov pawg yuav yog xiav.
Vim li cas qee lub nroog xiav thiab lwm tus yog dawb?
Ib qho pawg muaj plasmid (thiab yog li ntawd ua haujlwm gene-galactosidase gene) yuav tig mus xiav , los ntawm kev ua haujlwm β-galactosidase. Qhov no hu ua α-complementation. Qhov ntxig cuam tshuam rau gene-galactosidase noob, thiab yog li ntawd cov no cov cheeb tsam nyob twj ywm dawb.
Pom zoo:
Dab tsi yog qhov txawv ntawm xiav thiab xiav ntxiv rau ntawm JetBlue flights?
Lawv hu ua Blue, Blue Plus thiab Blue Flex fares. Tus nqi Blue Plus, uas suav nrog ib lub hnab kuaj dawb, feem ntau raug nqi txog $ 15 ntau dua li lub hauv paus Blue fare. Tus nqi Blue Flex, uas suav nrog ob lub hnab kuaj dawb, feem ntau raug nqi txog $ 85 ntau dua li Blue Plus tus nqi, cov thawj coj tau hais
Dab tsi yog cov tshuaj tiv thaiv ntawm daim ntawv xiav litmus thaum dipped rau hauv cov kua qaub uas muaj tshuaj?
Daim ntawv liab litmus reacts rau alkaline tshuaj los ntawm tig xiav, thaum xiav litmus ntawv reacts rau acidic tshuaj los ntawm tig liab
Tus neeg twg tau soj ntsuam kev mloog lus ntawm kev sib raug zoo los ntawm kev ua ib qho kev sim uas yuav tsum muaj cov tub ntxhais kawm cov ntsiab lus los tswj cov kev mob siab rau cov ntsiab lus hauv kev tshuaj xyuas kev kawm?
Milgram Shock Experiment Ib qho ntawm cov kev tshawb fawb nto moo tshaj plaws ntawm kev mloog lus hauv kev puas siab puas ntsws tau ua los ntawm Stanley Milgram, tus kws kho mob hlwb ntawm Yale University. Nws tau ua ib qho kev sim qhia txog qhov tsis sib haum xeeb ntawm kev mloog lus rau txoj cai thiab lub siab ntawm tus kheej
Dab tsi yog qhov kev tshuaj ntsuam xyuas hauv kev tshuaj xyuas?
Cov txheej txheem analytical yog ib hom pov thawj siv thaum lub sijhawm kuaj xyuas. Cov txheej txheem tshuaj ntsuam xyuas suav nrog kev sib piv ntawm ntau pawg ntawm cov ntaub ntawv nyiaj txiag thiab kev ua haujlwm, txhawm rau saib seb puas muaj kev sib raug zoo yav dhau los txuas ntxiv mus rau lub sijhawm tshuaj xyuas
Puas yog tag nrho cov tshuaj ntxhua khaub ncaws muaj kev nyab xeeb rau cov kab mob septic?
Rau cov pa, lub ntiajteb txawj nqus-powered system, siv ib tug kua daim ntawv ntawm cov ntxhua khaub ncaws detergents. Txawm li cas los xij, rau cov kab mob aerated septic, koj tuaj yeem siv cov kua dej ua haujlwm siab (nws) los yog hmoov ntxhua khaub ncaws kom tsis txhob muaj npuas ntau dhau hauv lub tshuab aeration. Septic tank zoo detergent yuav tsum muaj tsawg theem ntawm surfactants