Tindzaba
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I-bisphenol A BPA ifingqwa njani?
Kubuka konkhe kwe Bisphenol A BPA Ekucaleni yakhicitwa nga 1936 njenge estrogen yekwentiwa, iBisphenol A (BPA) nyalo ikhicitwa ngesilinganiso semnyaka lesingetulu kwetigidzigidzi letisitfupha tema pounds. I-Bisphenol I-BPA isetjentiswa kakhulu njengendlela yekwakha emapulasitiki e-polycarbonate, latfolakala emikhicitweni lefana ne-baby b...Fundza kabanti -
Yini kusetjentiswa kwe-bisphenol A lephansi?
i-polycarbonate kanye nemaresini e-epoxy. Iphindze isetjentiswe ekwakhiweni kwemapulasitiki labalulekile ebunjiniyela lafana ne polysulfone, kanye ne tetrabromobisphenol A, lesetjentiswa kakhulu njengentfo levimbela lilangabi. I-Polycarbonate (umtsengi lomkhulu we-bisphenol A) ayinambitseki, ayinaphunga, ayinabuthi, futsi i-trans...Fundza kabanti -
i-bisphenol i-bpa isetjentiselwa ini?
I-Bisphenol a bpa isetjentiswa kakhulu ekukhiciteni tintfo letehlukahlukene te-polymer, njengema-resin e-epoxy, ema-polycarbonate, ema-polysulfone, ema-resin e-phenolic langagcwali, ema-resin e-polyphenylene ether, emakhompawundi e-polyphenylene, ema-polyetherimides, ema-tetrabromobisphenol A, ema-polyetherimides lacitsa kushisa.Fundza kabanti -
Yini iphuzu lokubila bisphenol a?
iBisphenol A (BPA), lephindze yatiwe ngekutsi yi diphenylolpropane noma (4-hydroxyphenyl) propane, yakha emakristalu eprismatic ku ethanol lencane kanye nemakristalu lafana nenyaliti emantini. Iyavutsa futsi ineliphunga lelibutsakatsaka le phenolic. Indzawo yayo yekuncibilika ngu 157.2°C, indzawo yekukhanya ngu 79.4°C, kanye nendzawo yekubila ye bisphenol a ngu 2...Fundza kabanti -
Yini iBisphenol A?
Bisphenol A (bpa) Lwati Lolusisekelo I-Bisphenol A, lephindze yatiwe ngekutsi yi-BPA, yinhlanganisela yetintfo letiphilako lenefomula yemamolekhyuli C15H16O2. Etimbonini, isetjentiswa ekukhiciteni tintfo letifana ne polycarbonate (PC) kanye nema resin e-epoxy. Kusukela ngabo 1960, iBPA isetjentiswe ekwakhiweni kwepulasitiki...Fundza kabanti -
Indlela yekusebenta sodium hydrosulfite umbala ukususa?
Indlela Yekususa Emabala Lasendzaweni Yetingubo Letimhlophe Indlela Yekutsambisa Inkomishi Ye Sodium hydrosulfite Uma kunemabala lasendzaweni, sebentisa inkomishi lephotfuliwe yekutsambisa. Thela linani lelitsite lemanti lashisako (ngetulu kwa 90°C) kulendzebe. Faka i-sodium hydrosulfite (kugcila lokucishe kube ngu 2.5%) bese uyavusa kutsi kuncibilike. Cwilisa...Fundza kabanti -
Ngutiphi tinhlobo tekuba khona kwe-sodium dithionite?
Timphahla letibonakalako: iSodium dithionite ihlukaniswe njengentfo levutsako yeLibanga 1. Iphindze yatiwe ngekutsi yi Rongalite Ngekwekutsengiselana, ikhona ngetindlela letimbili: Na2S2O4·2H2O kanye ne Na2S2O4 lete emanti. Leyo yekucala iyi-crystal lemhlophe lencane, kantsi leyo yekugcina iyimpuphu lephuti lekhanyako. Kucina kwayo lokuhlobene ngu...Fundza kabanti -
I-Ejenti Lenciphisako: I-Sodium Hydrosulfite
I-Ejenti Lenciphisako: I-Sodium Hydrosulfite Ligama Lekhemikhali: I-Sodium Dithionite. Nawucatsanisa netintfo letikhicita i-oksijini, i-sodium hydrosulfite ibangela kulimala lokuncane kakhulu etindvwangu. Ingasetjentiswa etintfweni letentiwe ngetintfo letehlukene ngaphandle kwekubangela kulimala, kungako leligama lelitsi “hydrosulfite” (lelisho kuphepha kwayo). I...Fundza kabanti -
Yini indima ye-sodium hydrosulfite emicuni yetindvwangu?
Imicu lefanele ye sodium hydrosulfite i sodium hydrosulfite ilungele imicu leyehlukahlukene yetintfo tekugcoka, kungako ligama layo lelitsi “Rongalite.” Uma isetjentiselwa kuhlanta ngekushisa lokusetulu noma kususa libala, lemicu yendvwangu kumele ikhone kumelana nekushisa lokusetulu ngaphandle kwekulimala. Ngekuya kwesitifiketi...Fundza kabanti -
Ngutiphi tingoti te-sodium hydrosulfite?
I-Sodium hydrosulfite inebuthi futsi ingacasula emehlo kanye ne-mucosa yemgudvu wekuphefumula. Isetjentiswa kakhulu embonini yetindvwangu tekudaya lokunciphisako, kuhlanta lokunciphisako, kushicilela, kukhipha umbala, kanye nekukhipha silika, uboya, nylon, kanye naletinye tindvwangu. Njengobe ingenatinsimbi letisindzako, tindvwangu letihlanjululwe nge...Fundza kabanti -
Yini letawenteka nangabe i-sodium hydrosulfite ivela emoyeni?
Uma ivulelekile emoyeni, i-sodium hydrosulfite itsatsa umoya-mpilo kalula bese iyakhipha i-oksijini. Iphindze imunce umswakama, ikhicite kushisa futsi kuholele ekuboleni. Ingahlangana ndzawonye ngesikhatsi imunya umoya-mpilo losemkhatsini bese ikhipha liphunga lelibi le-esidi. Na2S2O4 + 2H2O + O2 → 2NaHSO4 + 2[H] Kushisa noma kuchayeka...Fundza kabanti -
Yini timphawu letibonakalako te-sodium hydrosulfite?
I-sodium hydrosulfite Timphahla letibonakalako I-sodium hydrosulfite ihlukaniswe njengentfo levutsako lebucayi ngeLibanga 1, lephindze yatiwe ngekutsi yi-sodium dithionite. Itfolakala ngekutsengiswa ngetindlela letimbili: lenemanti (Na2S2O4·2H2O) kanye nekungabi nemanti (Na2S2O4). Lelifomu le-hydrated livela njenge-cryst lemhlophe lencane...Fundza kabanti