Video: Nyob rau theem twg S yog cov molecules tuav nyob rau hauv ib daim ntawv teev?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
khov kho
Ntawm no, nyob rau theem S twg yog cov molecules tuav nyob rau hauv cov duab meej?
Khoom
Ib yam li ntawd, qhov kub thiab txias cuam tshuam li cas rau theem hloov? Cov cua sov yog siv los rhuav tshem cov kev sib txuas ntawm cov dej khov molecules thaum lawv tig mus ua kua theem . Txij li qhov nruab nrab kinetic zog ntawm cov molecules tsis hloov thaum lub sij hawm melting, lub kub ntawm cov molecules tsis hloov.
Tsuas yog, ntawm qhov kub npaum li cas dej yuav hloov ntawm cov kua mus rau qhov khov khov?
Supercooling yog cov txheej txheem ntawm kev txo qhov kub ntawm cov kua los yog roj hauv qab nws qhov chaw khov yam tsis tau ua ib qho khoom (raws li hauv coke tricks qhia hauv video). Thaum cov kua nce mus txog nws qhov chaw khov kho (feem ntau yog 0 degrees Celsius rau dej) nws yuav crystalize thiab ua ib qho khoom.
Vim li cas cov kev hloov pauv tshwm sim?
Qauv teb: Kev hloov theem tshwm sim vim lub zog ntawm molecular zog. Raws li cua sov yog ntxiv rau cov khoom, cov molecules tawg tawm ntawm lawv cov ntawv cog lus thiab pib txav mus los ywj pheej, ua rau cov khoom tawg. Raws li cua sov yog ntxiv rau cov kua, cov molecules txav nrawm dua thiab nrawm dua kom txog thaum lawv tawg tsis muaj kua thiab dhau los ua roj.
Pom zoo:
Dab tsi yog cov xim muaj nyob rau hauv daim ntawv qhia kev phom sij rau kev noj qab haus huv hauv NFPA 704?
NFPA 704 pob zeb diamond kos npe siv los tso saib cov ntaub ntawv no muaj plaub ntu xim: xiav, liab, daj, thiab dawb. Txhua ntu yog siv los txheeb xyuas ib pawg sib txawv ntawm qhov muaj peev xwm txaus ntshai. Ntu xiav ntawm NFPA xim code cim qhia txog kev phom sij rau kev noj qab haus huv
Cov pab pawg twg ntawm cov ntawv teev sijhawm twg yog cov tshuaj chlorine?
Chlorine belongs rau pab pawg neeg ntawm halogens - ntsev tsim - ua ke nrog fluorine (F), bromine (Br), iodine (I) thiab astatine (At). Lawv tag nrho nyob rau hauv kab thib ob los ntawm sab xis ntawm lub rooj sib tham hauv Pawg 17. Lawv cov teeb tsa hluav taws xob zoo sib xws, muaj xya lub tshuab hluav taws xob hauv lawv lub plhaub sab nraud
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Yuav ua li cas koj sau txoj kab nqes nqes intercept daim ntawv nyob rau hauv tus qauv daim ntawv?
Standard form yog lwm txoj hauv kev los sau daim ntawv nqes hav-intercept (as opposed to y=mx+b). Nws sau li Ax+By=C. Koj tuaj yeem hloov daim ntawv nqes hav-intercept rau cov qauv zoo li no: Y=-3/2x + 3. Tom ntej no, koj cais qhov y-intercept (qhov no nws yog 2) zoo li no: Ntxiv 3/2x rau txhua sab ntawm kab zauv kom tau qhov no: 3/2x + y = 3
Cov txheej txheem dab tsi uas tus kws tshawb fawb siv los tsim ntau cov ntawv luam ntawm DNA xav tau sau rau hauv daim ntawv dawb paug 1?
Molecular Cloning. Cloning tso cai rau tsim ntau cov ntawv luam ntawm cov noob, qhia cov noob, thiab kawm txog cov noob tshwj xeeb. Yuav kom tau txais cov DNA tawg rau hauv cov kab mob hauv cov kab mob hauv daim ntawv uas yuav tau theej lossis nthuav tawm, cov khoom tawg yog thawj zaug tso rau hauv plasmid