Melaminefeem ntau yog siv rau hauv daim ntawv ntawm cov hmoov dawb. Nws yog ib qho tseem ceeb ntawm cov khoom nruab nrab ntawm cov organic chemical kev lag luam. Thaum nws muaj ntau dua 99.8 feem pua, nws tuaj yeem yaj hauv methanol, formaldehyde, acetic acid, glycerin, thiab lwm yam. Yog tias noj rau lub sijhawm ntev, nws yuav ua rau muaj kev loj hlob ntawm cov menyuam yaus thiab cov zis, thiab lub zais zis thiab lub raum pob zeb tuaj yeem ua rau lub zais zis ntxiv. mob qog noj ntshav. Nws belongs rau kev lag luam raw khoom thiab ib qho tseem ceeb organic chemical khoom. Nws kuj yog ib qho tshuaj lom me ntsis soluble hauv dej thiab tsis pub ntxiv rau cov zaub mov.
Hauv kev sim xyoo 2008, cov ntsiab lus melamine siab tshaj plaws hauv Sanlu hom me nyuam mos mis mis hmoov yog 2563 mg / kg, thiab cov khoom siv tshuaj lom neeg no uas tsis tuaj yeem tshwm sim hauv cov zaub mov yog qhov ua txhaum uas ua rau cov me nyuam mos los ntawm lub raum thiab urinary system pob zeb.
Yog li, qhov tseeb yog dab tsimelamine? English melamine, the molecular formula is C3H6N6, also known as, 2,4,6-tri amino-1,3,5-triazine. The appearance and physical properties of melamine are pure white monoclinic prism crystal, white and tasteless, which is similar to the appearance of protein powder. Melting point 345 Degrees (decomposition), density 1.573 grams / cubic meter (16 degrees). Slightly soluble in water and ethanol, and can form salts with sulfuric acid, nitric acid, acetic acid, oxalic acid, etc.
Hauv nruab nrab lossis me ntsis alkaline, Nws yog condensed nrog formaldehyde los tsim ntau yam hydroxymethyl melamine. Tseem, nyob rau hauv me ntsis acidic tej yam kev mob (pH nqi 5.5-6.5), nws yog polycondensation nrog methyl derivatives los tsim ntsuab resin khoom. Thaum nws yog hydrolyzed nyob rau hauv ib tug muaj zog alkaline aqueous tov, cov amine pawg yog maj hloov los ntawm cov hydroxyl pab pawg neeg los tsim cyanuric acid diamide, ntxiv hydrolyzed los ua cyanuric acid monoamide, thiab thaum kawg tsim nws.
qhov no tsuas yog cov tshuaj dawb huv thiab cov khoom siv raw uas tsis muaj dab tsi ua rau cov khoom noj. Yog li ntawd, yog tias tib neeg noj yuam kev, lawv txoj kev noj qab haus huv yuav raug puas tsuaj loj.
nws tuaj yeem ua rau tsis yog pob zeb raum nkaus xwb tab sis kuj muaj kev cuam tshuam loj heev rau tib neeg kev noj qab haus huv. Cov tsos mob tseem ceeb ntawm lub raum pob zeb yog mob thiab hematuria. Qhov mob tuaj yeem yog mob npub lossis mob colic. Cov tsos mob nyob ntawm qhov loj thiab qhov chaw ntawm lub pob zeb, qhov degree ntawm kev thaiv thiab kis kab mob. Ob peb lub pob zeb uas tsis muaj kev cuam tshuam lossis cuam tshuam me me yam tsis muaj kab mob feem ntau yog asymptomatic thiab tau ua rau lub raum tsis ua haujlwm tsis zoo. Nws pom tsuas yog thaum ua B-ultrasound, plab X-ray lossis CT kuaj. Kev puas tsuaj ntawm pob zeb rau lub raum feem ntau yog nyob rau hauv thaiv cov urethra thiab ncaj qha ua rau lub urethral mucosa, uas ua rau lub raum tsis ua hauj lwm.
Melaminetau ua rau ntau tus menyuam raug kev txom nyem los ntawm cov kab mob loj thiab coj cov qhov txhab tsis zoo rau ntau tsev neeg hauv peb lub tebchaws. Cov me nyuam yog cov paj yav tom ntej ntawm lub teb chaws. Peb tsis kam coj qhov kev puas tsuaj no rau lwm tus. Yog li ntawd, melamine yog ruaj khov tsis pub siv rau hauv tej yam khoom noj.