2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nyob rau hauv pej xeem, kev hloov pauv ntawm pej xeem yog qhov tshwm sim thiab kev xav uas hais txog keeb kwm hloov pauv los ntawm kev yug me nyuam thiab cov menyuam mos tuag siab hauv cov zej zog nrog cov thev naus laus zis tsawg, kev kawm, thiab kev txhim kho kev lag luam, kom txo qis kev yug me nyuam thiab cov neeg tuag tsawg hauv cov zej zog nrog cov thev naus laus zis, kev kawm thiab …
Koj siv kev hloov pauv pej xeem hauv kab lus li cas?
Lub teb chaws uas muaj kev lag luam thaum kawg pom lawv cov pej xeem kev loj hlob qeeb, qhov tshwm sim hu ua kev hloov pauv pej xeem. Industrialization tsim ib qho kev hloov ntawm pej xeem nyob rau hauv uas cov nqi yug me nyuam poob thiab qhov nruab nrab hnub nyoog ntawm cov pejxeem nce.
4 theem ntawm kev hloov pauv pej xeem yog dab tsi?
Stage 1- siab thiab hloov pauv kev yug me nyuam thiab kev tuag arte thiab cov pejxeem kev loj hlob tseem qeeb Theem 2- siab yug thiab txo qis kev tuag thiab cov pejxeem loj hlob sai Theem 3- Txo tus nqi yug me nyuam thiab kev tuag tsawg thiab cov neeg poob qis Kev loj hlob Theem 4- tus me nyuam yug thiab tuag tsawg thiab kev loj hlob ntawm cov pejxeem qeeb …
Lub hom phiaj ntawm kev hloov pauv pej xeem yog dab tsi?
Tus Qauv Hloov Pej Xeem (DTM) yog ua raws li keeb kwm ntawm cov pej xeem sib txawv ntawm ob tus yam ntxwv ntawm pej xeem - tus nqi yug thiab tus nqi tuag - los qhia tias ib lub teb chaws tag nrho cov pejxeem kev loj hlob mus txog theem raws li lub teb chaws txhim kho economically.
Qhov piv txwv ntawm yog dab tsiKev hloov pauv pej xeem?
Raws li tam sim no, lub teb chaws zoo li Afghanistan, Yemen, thiab Nplog, ntawm lwm tus, phim cov qauv no. Raws li cov zej zog tau dhau los ua kev lag luam ntau dua, lawv nkag mus theem pebntawm kev hloov pauv ntawm pej xeem txoj kev xav. Los ntawm theem peb, cov neeg tuag tseem tsawg, tab sis kev yug me nyuam pib poob ib yam nkaus.
Pom zoo:
Dab tsi yog qhov hloov pauv thiab hloov pauv hloov pauv?
Point mutations hloov ib leeg nucleotide. Frameshift kev hloov pauv yog ntxiv lossis tshem tawm ntawm nucleotides uas ua rau muaj kev hloov pauv hauv kev nyeem ntawv. frameshift thiab point mutation yog dab tsi? Ib qho kev hloov pauv cuam tshuam rau ib khub hauv paus.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
