Urea

Urea

Urea, tseem hu ua carbamide, yog cov organic sib txuas muaj cov pa roj carbon, oxygen, hydrogen, thiab nitrogen. Urea muaj cov molecular hnyav ntawm 60.06 thiab tshwm sim li cov khoom dawb nrog cov xim liab me ntsis ntawm chav sov. Urea yog cov nitrogen-muaj cov khoom lag luam uas muaj protein ntau yam thiab kev txiav txim siab hauv tib neeg lub cev, thiab tam sim no nitrogen fertilizer nrog cov ntsiab lus nitrogen ntau tshaj plaws. Urea yog soluble hauv dej, formaldehyde, methanol, kua ammonia, thiab ethanol.

Cov hauv qab no yog cov haujlwm tshwj xeeb ntawm urea:

Urea ua lub luag haujlwm tseem ceeb hauv cov metabolism hauv cov metabolism ntawm cov kab sib txuas hauv tsiaj lub cev thiab yog lub ntsiab nitrogen-muaj cov tshuaj hauv cov zis tsiaj hauv cov tsiaj mammalian. Nws yog ib qho tsis muaj kob, tsw ntxhiab tsw, muaj kuab heev hauv dej, thiab yuav luag tsis-toxic (ld50 yog 15 g / kg hauv cov nas). Dissolve hauv dej, tsis yog acidic tsis alkaline. Lub cev siv nws nyob rau hauv ntau cov txheej txheem, feem ntau cov nitrogen excretion. Daim ntawv sim siab nws los ntawm kev sib txuas ob ammonia lwg (NH3) nrog cov pa roj carbon dioxules hauv cov tshuaj nitrogen nyob rau hauv cov chiv thiab yog ib qho khoom siv tseem ceeb hauv kev lag luam tshuaj.

Ntau tshaj li 90% ntawm lub ntiaj teb urea kev lag luam ntau lawm yog siv los ua nitrogen tso cov chiv. Nisu muaj cov ntsiab lus nitrogen zoo tshaj plaws ntawm txhua tus nquag siv cov tshuaj nitrogen chiv. Yog li ntawd, tus nqi thauj mus los ntawm chav nyob nitrogen cov as-ham yog tsawg. Qhov feem ntau cov impurity innthetic urea yog urea, uas tuaj yeem ua kev puas tsuaj cog kev loj hlob. Urea decomposes nyob rau hauv av los tsim ammonium.

Ammonium yog nqus tau los ntawm cov nroj tsuag. Hauv qee qhov av, ammonium yog oxidized los ntawm cov kab mob rau nitrate, uas kuj yog cov khoom noj cog. Qhov poob ntawm nitrogen-muaj cov kab sib txuas rau hauv cov huab cua thiab cov dej pheebsoff tsis tsuas yog ua rau cov khib nyiab, tab sis kuj ua rau ib puag ncig. Vim li no, urea qee zaum ua kom pom tseeb los yog hloov kho los txhim kho nws txoj kev siv ua liaj ua teb. Ib qho ntawm cov thev naus laus zis yog tswj tso cov chiv chiv, uas muaj urea enjapsulated nyob rau hauv ib tug inert sealant. Lwm qhov thev naus laus zis yog hloov urea rau hauv derivatives, xws li formaldehyde, uas muaj kev xav tau ntawm cov khoom noj uas xav tau ntawm cov nroj tsuag.

Ua tsaug rau koj cov kev mus ntsib thiab tos txais koj cov lus nug zoo!

Cim npe nrov: Urea, Tuam Tshoj urea cov tuam ntxhab, cov chaw muag khoom, Hoobkas