Cov txheej txheem:
Video: Dab tsi yog cov hlau hloov pauv siv rau?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hloov cov hlau muaj ntau yam ntawm siv , nrog qee qhov tseem ceeb hauv qab no: Hlau feem ntau ua rau cov hlau, uas muaj zog dua thiab yooj yim dua li cov hlau ntawm nws tus kheej. Nws yog dav siv nyob rau hauv cov khoom siv, cov cuab yeej, tsheb thiab ua ib qho catalyst hauv kev tsim cov ammonia.
Ib yam li ntawd, tib neeg nug, peb siv cov hlau hloov pauv rau dab tsi?
Hloov cov hlau yog siv raws li catalysts nyob rau hauv ntau txoj kev. Peb siv hlau nto nrog oxides los ua ammonia. Qhov no yog txoj kev pheej yig tshaj plaws los tsim cov ammonia, thiab siv ntau hauv cov chiv. Hlau nto ua tau adsorb cov ntsiab lus thiab compounds rau hauv nws tus kheej.
Ib yam li ntawd, cov kev hloov pauv dab tsi tuaj yeem siv los ua cov hlau? Titanium , chromium , thiab manganese yog cov hlau hloov pauv uas tau siv ntau hlau alloys los tsim corrosion-resistant, ruaj, thiab lub teeb yuag steel.
Ua raws li qhov no, kev siv cov hlau hloov pauv hauv tshuaj lom neeg yog dab tsi?
Lub Sijhawm Table
- Qee qhov kev hloov pauv hlau muaj kev siv dav,
- Hloov pauv hlau feem ntau tsim cov hlau tseem ceeb.
- Cov hlau hloov pauv feem ntau ua rau cov khoom siv zoo rau cov tshuaj tiv thaiv tshwj xeeb.
- Hlau hauv Haber txheej txheem.
- Manganese (IV) oxide nyob rau hauv decomposition ntawm hydrogen peroxide.
Dab tsi yog qhov tseem ceeb tshaj plaws ntawm kev hloov pauv hlau?
Cov khoom ntawm kev hloov pauv muaj xws li:
- muaj tus nqi loj / vojvoog piv;
- yog cov tawv thiab muaj siab ceev;
- muaj siab melting thiab boiling ntsiab lus;
- daim ntawv sib txuas uas feem ntau yog paramagnetic;
- qhia qhov sib txawv ntawm oxidation xeev;
- tsim xim ions thiab cov tebchaw;
- tsim cov tebchaw nrog kev ua haujlwm catalytic;
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
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
Dab tsi tsim cov roj siab thiab nws hloov pauv li cas nrog kev hloov pauv hauv kinetic zog?
Gas siab yog tshwm sim los ntawm kev sib tsoo ntawm cov khoom siv roj nrog rau sab hauv ntawm lub thawv thaum lawv sib tsoo nrog thiab tawm dag zog rau ntawm phab ntsa ntim. Tom qab ntawd cov roj yog cua sov. Raws li qhov kub ntawm cov roj nce, cov khoom tau nce lub zog kinetic thiab lawv cov nrawm nrawm
Dab tsi ua rau muaj qhov hloov pauv hloov pauv?
Point kev hloov. Point mutation, hloov nyob rau hauv ib tug noob nyob rau hauv uas ib tug hauv paus khub nyob rau hauv lub DNA ib theem zuj zus yog hloov. Kev hloov pauv ntawm cov ntsiab lus feem ntau yog tshwm sim los ntawm kev ua yuam kev thaum lub sij hawm DNA replication, txawm hais tias kev hloov pauv ntawm DNA, xws li los ntawm kev cuam tshuam rau X-rays lossis rau ultraviolet hluav taws xob, kuj tuaj yeem ua rau muaj kev hloov pauv
Peb qhov laj thawj tseem ceeb ntawm kev hloov pauv hloov pauv yog dab tsi?
Allele frequencies nyob rau hauv ib tug pej xeem yuav hloov vim plaub lub hauv paus zog ntawm evolution: Natural Selection, Genetic Drift, Mutations thiab Gene Flow. Kev hloov pauv yog qhov kawg ntawm cov alleles tshiab hauv cov noob caj noob ces. Ob ntawm cov txheej txheem tseem ceeb tshaj plaws ntawm kev hloov pauv hloov pauv yog: Natural Selection thiab Genetic Drift