2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Muaj ob peb lwm txoj hauv kev uas tuaj yeem siv los pib crystallization thaum khawb tsis tau: Ntxiv "cov noob siv lead ua": ib qho me me ntawm cov khoom nyoos tau txais kev cawmdim los ntawm ua ntej crystallization tau pib, los yog me ntsis ntawm cov khoom ntshiab los ntawm ib lub thawv reagent. Cov noob muaju tsim qhov chaw nucleation qhov twg cov muaju tuaj yeem pib loj hlob.
Cov txheej txheem twg tuaj yeem siv los ua kom muaj crystallization hauv cov tshuaj supersaturated?
Lub recrystallization ntawm cov kua dej ntau dhau hauv cov tshuaj supersaturated tuaj yeem pib los ntawm ntxiv ntawm cov khoom siv me me ntawm cov kua nplaum, hu ua cov noob siv lead ua. Cov noob siv lead ua muab qhov chaw nucleation uas cov crystals ntau dhau tuaj yeem pib loj tuaj.
Vim li cas dej thiaj siv los ua kom muaj crystal?
Ntxiv dej tuaj yeem sai thiab txo qis solubility ntawm ntau cov organics thiab yog li induce crystallization. … Crystallization yuav tsum pib ntawm qee qhov chaw nucleation. (Crystals loj hlob thaum molecules "zoo" mus rau ib co preexisting nto.) Qee zaum qhov no yuav tshwm sim nws tus kheej, tab sis qee zaus nws nyuaj.
Lub hauv paus ntsiab lus ntawm crystallization yog dab tsi?
Crystalization yog raws li cov hauv paus ntsiab lus ntawm solubility: cov tebchaw (cov kuab tshuaj) zoo li cov kua dej kub ntau dua (cov kuab tshuaj) dua li cov dej txias. Yog hais tias ib tug saturated kub tov yog tso cai kom txias, lub solute yuav tsis soluble nyob rau hauv cov kuab tshuaj thiab cov ntaub ntawv muaju.ntshiab compound.
Puas muaj cov pob zeb loj hlob zoo dua hauv lub teeb lossis tsaus?
Crystal loj hlob kuj xav tau lub teeb. Ib zaug ntxiv, crystals thaum kawg yuav loj hlob hauv qhov tsaus ntuj, tab sis nws yuav siv sijhawm ntev heev. Lub teeb evaporates dej raws li cua sov ua; muab lawv tso los ntawm kev tso koj lub thawv rau ntawm qhov sov, tshav ntuj windowsill thiab koj yuav tsum muaj cov iav hauv ob peb hnub.
Pom zoo:
Yuav ua li cas thiaj ua rau craniectomy?
Yuav ua kom craniectomy, koj tus kws phais: Ua kom me me ntawm koj cov tawv taub hau qhov twg cov pob txha taub hau yuav raug tshem tawm. … Tshem tawm cov tawv nqaij lossis cov ntaub so ntswg saum thaj chaw ntawm pob txha taub hau uas yuav raug tshem tawm.
Yuav ua li cas thiaj ua rau muaj kev puas tsuaj tsuas yog ua rau 3?
Nws nyuaj heev rau "ua rau muaj kev puas tsuaj" hauv lub nroog no dua li lwm yam vim tsis muaj yeeb ncuab, tsheb thiab Sabotage Destructible Objects hauv tub ceev xwm chaw nres tsheb. Txoj hauv kev zoo tshaj plaws kom ua tiav yog tawm ntawm thaj chaw sib ntaus sib tua kom muaj kev txhawb nqa ntxiv, tom qab ntawd rhuav tshem lawv hauv chaw tub ceev xwm.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Yuav ua li cas txhawm rau txhawm rau txhawm rau sib npaug?
Nyob rau hauv txhua pab pawg, xauv tuaj yeem raug yuam kom sib npaug yog tias xav tau. Cov locks no tseem yuav ua haujlwm los ntawm tus yawm tswv qhov tseem ceeb. Cov txheej txheem no siv qhov twg 2 lossis ntau dua qhov tseem ceeb ntawm tus tswv lag luam yuav tsum tau ua, nrog rau txhua tus tswv lag luam tseem ceeb muaj peev xwm ua tau los ntawm tus yuam sij loj loj.
Yuav ua li cas txhawm rau txhawm rau txhawm rau?
Tus kab mob abscess tsis tas yuav tsum tau kho mob. Cov kab mob me me tuaj yeem ntws tawm ntawm lawv tus kheej lossis nrog ntau yam tshuaj hauv tsev. Koj tuaj yeem pab tau me me abscess pib ntws los ntawm kev siv qhov kub thiab noo compress rau thaj tsam cuam tshuam.
