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Video: Dab tsi yog qhov tshwj xeeb ntawm graphite?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Yog hais tias koj yog ib tug scientifically-minded neeg, lub zog ntawm graphite yuav txaus siab. Graphite muaj nomelting point ntawm atmospheric siab, yog ib tug zoo conductor ntawm tshav kub, thiab yog resistant rau ntau chemicals, uas ua rau nws ib tug zoo tagnrho khoom rau crucibles.
Tsis tas li ntawd, dab tsi yog qhov txawv ntawm graphite?
Graphite yog txawv txawv vim nws yog anon-hlau uas ua hluav taws xob.
Dab tsi yog cov yam ntxwv ntawm graphite uas ua rau nws muaj txiaj ntsig hauv xaum? Graphite yog ib qho grey tsaus rau dub, muag muag heev, ci iab xim hlau ntxhia nrog qhov txawv greasy zoo nkaus li. Ib qho ntawm lub ntiaj teb softest minerals, graphite yuav yooj yim leavemarks ntawm daim ntawv, uas yog vim li cas nws yog siv rau cov artist zoo xaum.
Ua raws li qhov no, qhov kev siv graphite feem ntau yog dab tsi?
Cov "lead" sau rau hauv cov xaum yog qhov tseeb ntawm kev sib xyaw ntawm Graphite thiab av nplaum. Graphite lub ntsiab kev ua haujlwm, txawm li cas los xij, yog li lub roj nplua nyeem. Nws muaj ntau yam hluav taws xob siv , feem ntau vim nws tsuas yog feem ntau nonmetal uas yog ib tug zoo conductor ntawm hluav taws xob.
Dab tsi yog cov khoom graphite muaj?
Lub cev muaj zog ntawm graphite
- muaj lub siab melting point, zoo ib yam li cov pob zeb diamond.
- muaj qhov muag muag, nplua zoo, thiab siv rau hauv cov xaum thiab ua cov roj pleev rau cov khoom xws li cov xauv.
- muaj qhov ntom ntom dua li pob zeb diamond.
- yog insoluble nyob rau hauv dej thiab organic solvents - rau tib yam vim li cas pob zeb diamond yog insoluble.
Pom zoo:
Lub luag haujlwm ntawm CDK yog dab tsi hauv lub cev ua haujlwm ntawm tes tshwj xeeb hauv lub voj voog ntawm tes?
Los ntawm phosphorylation, Cdks teeb liab lub xov tooj ntawm tes uas nws tau npaj kom dhau mus rau theem tom ntej ntawm lub voj voog ntawm tes. Raws li lawv lub npe qhia, Cyclin-Dependent Protein Kinases yog nyob ntawm cyclins, lwm chav kawm ntawm kev tswj hwm cov protein. Cyclins khi rau Cdks, ua kom cov Cdks rau phosphorylate lwm cov molecules
Dab tsi yog qhov tshwj xeeb ntawm cov av?
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