Video: Hom kev hloov pauv twg yog lub xeev hloov?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev hloov ntawm lub xeev yog kev hloov ntawm lub cev hauv qhov teeb meem. Lawv yog cov kev hloov pauv uas tsis hloov qhov teeb meem tshuaj pleev lossis tshuaj lom neeg. Cov txheej txheem koom nrog hauv kev hloov pauv hauv xeev suav nrog yaj , freezing, sublimation, deposition, condensation, thiab evaporation.
Tsis tas li ntawd, 4 lub xeev hloov pauv li cas?
Cov khoom hauv ntiaj teb tuaj yeem muaj nyob hauv ib qho ntawm plaub theem, tab sis feem ntau, lawv muaj nyob hauv ib qho ntawm peb: khoom, kua lossis roj. Kawm txog rau qhov kev hloov pauv ntawm theem: khov , yaj , condensation , vaporization , sublimation thiab tso nyiaj.
Ib yam li ntawd, dab tsi tsis hloov thaum lub xeev hloov? Cov cua sov yog siv los rhuav tshem cov kev sib txuas ntawm cov dej khov molecules thaum lawv tig mus rau hauv cov kua theem. Txij li qhov nruab nrab kinetic zog ntawm cov molecules tsis hloov Thaum lub sij hawm melting, qhov kub ntawm cov molecules tsis hloov.
Ua li no, yuav ua li cas tshwm sim thaum nws hloov lub xeev?
Teeb meem txawm poob los yog absorbs zog thaum nws kev hloov los ntawm ib xeev rau lwm tus. Piv txwv li, thaum teeb meem hloov los ntawm cov kua rau ib qho khoom, nws poob zog. Qhov txawv tshwm sim thaum teeb meem hloov los ntawm ib tug khoom mus rau ib tug kua. Rau ib tug ruaj rau hloov mus ua kua, teeb meem yuav tsum nqus lub zog ntawm nws ib puag ncig.
Yuav ua li cas hloov lub xeev?
Kev hloov ntawm lub xeev yog lub cev kev hloov hauv qhov teeb meem. Lawv yog reversible kev hloov uas tsis ua hloov teeb meem tshuaj pleev los yog tshuaj lom neeg cov khoom. Cov txheej txheem koom nrog kev hloov ntawm lub xeev muaj xws li melting, freezing, sublimation, deposition, condensation, thiab evaporation. Lub zog yeej ib txwm koom nrog kev hloov ntawm lub xeev.
Pom zoo:
Dab tsi yog qhov kev hloov pauv hloov pauv?
Kev hloov pauv, hauv molecular biology, yog hais txog kev hloov pauv hauv deoxyribonucleic acid (DNA), qhov twg ib qho (ob lub nplhaib) purine hloov pauv rau (ib lub nplhaib) pyrimidine, los yog vice versa
Vim li cas tom qab kev hloov pauv kev hloov pauv tseem ceeb?
Kev hloov pauv tom qab kev txhais lus (PTMs) xws li glycosylation thiab phosphorylation ua lub luag haujlwm tseem ceeb ntawm kev ua haujlwm ntawm hemostatic proteins thiab tseem ceeb heev hauv kev teeb tsa kab mob. Xws li theem nrab hloov pauv rau cov proteins hemostatic muaj ntau yam cuam tshuam rau lawv lub peev xwm los cuam tshuam nrog lwm cov proteins
Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system
Thaum twg cov khoom hloov pauv ncaj qha mus rau cov roj, qhov kev hloov ntawm lub xeev hu ua?
Sublimation yog tus txheej txheem ntawm transformation ncaj qha los ntawm cov khoom theem mus rau lub gaseous theem, tsis dhau los ntawm ib tug nruab nrab kua theem. Tsis tas li ntawd, nyob rau hauv qhov siab ntawm qhov siab ntawm triple point, qhov kub thiab txias yuav ua rau cov khoom hloov pauv mus rau cov roj yam tsis tau dhau los ntawm cov dej hauv cheeb tsam