Iindaba
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I-bisphenol A BPA ifingqwa njani?
Ukuhlolisisa nge-Bisphenol A BPA Ekuthomeni yakhiqizwa ngo-1936 njenge-estrogen yokwenziwa, i-bisphenol A (BPA) nje yenziwa ngevolumu edlula ama-6 billion pounds. I-Bisphenol A BPA isetjenziswa khulu njengesisetjenziswa sokwakha amapulasitiki we-polycarbonate, atholakala emikhiqizweni efana ne-baby b...Funda kabanzi -
Ngikuphi ukusetjenziswa kwe-bisphenol A?
i-polycarbonate kanye nama-epoxy resins. Isetjenziselwa nokwenza amaplastiki aqakathekileko wobunjiniyela afana ne-polysulfone, kanye ne-tetrabromobisphenol A, esetjenziswa khulu njengesivikeli selangabi. I-polycarbonate (umthengi omkhulu we-bisphenol A) ayinanambitheki, ayinaphunga, ayinabuthi, begodu itjhuguluka...Funda kabanzi -
i-bisphenol i-bpa isetjenziselwa ini?
I-bisphenol a bpa isetjenziswa khulu ekukhiqizeni izinto ezihlukahlukeneko ze-polymer, ezifana nama-epoxy resins, ama-polycarbonates, ama-polysulfones, ama-resin we-phenolic unsaturated, ama-resin we-polyphenylene ether, ama-polyaryl compounds, ama-polyetherimides, i-tetrabromobisphenol A, ama-PVC heat stabilizers, ama-antioxidant we-agriberuber...Funda kabanzi -
Iyiphi izinga lokubilisa le-bisphenol a?
I-Bisphenol A (BPA), eyaziwa nangokuthi yi-diphenylolpropane nofana (4-hydroxyphenyl)propane, yenza amakristalu we-prismatic ku-ethanol ehlanjululweko kanye namakristalu afana nenaliti emanzini. Ivutha begodu inephunga elincani le-phenolic. Indawo yayo yokuncibilika ngu-157.2°C, indawo yokukhanya ngu-79.4°C, begodu indawo yokubila ye-bisphenol a ngu-2...Funda kabanzi -
Khuyini i-Bisphenol A?
I-Bisphenol A (bpa) Ilwazi eliyisisekelo I-Bisphenol A, eyaziwa nangokuthi yi-BPA, yi-organic compound enefomula yamamolekhyuli C₁₅H₁₆O₂. Emabubulweni, isetjenziselwa ukwenza izinto ezifana ne-polycarbonate (PC) kanye nama-epoxy resins. Solo kwangabo-1960, i-BPA sele isetjenziselwa ukwenza amaplastiki...Funda kabanzi -
Indlela yokusebenzisa isodiyamu ye-hydrosulfite yokususa umbala?
Indlela yokususa amabala wendawo ezambathweni ezimhlophe Indlela yokuthambisa ngekopi ye-sodium hydrosulfite Nangabe kunamabala wendawo, sebenzisa ikopi enegraduwe yokuthambisa. Thela inani elithileko lamanzi atjhisako (ngaphezulu kwama-90°C) ngaphakathi kwekomitjhini. Faka i-sodium hydrosulfite (ubukhulu obulinganiselwa ku-2.5%) bese ugoqa ukuze incibilike. Cwilisa...Funda kabanzi -
Ngiziphi iindlela zokuba khona kwe-sodium dithionite?
Iimpawu ezibonakalako: I-sodium dithionite ihlukaniswe njengento evuthako yeGreyidi 1. Yaziwa nangokuthi yi-Rongalite Ngokwezokuthengisa, ikhona ngeendlela ezimbili: i-Na2S2O4·2H2O kanye ne-Na2S2O4 engenamanzi. Eyokuqala yikristalu emhlophe encani, kuthi eyesibili ibe yipuyere etjheli ekhanyako. Ukuminyana kwayo okuhlobeneko...Funda kabanzi -
I-ejenti yokunciphisa: I-Sodium Hydrosulfite
I-Reducing Agent: Sodium Hydrosulfite Ibizo lekhemikhali: Sodium dithionite. Nayimadaniswa nama-ejenti we-oksijini, i-sodium hydrosulfite ibangela umonakalo omncani khulu eentjhini. Ingasetjenziswa eentjhini ezenziwe ngemicu ehlukileko ngaphandle kokubanga umonakalo, kungebangelo ibizo elithi "hydrosulfite" (okutjho ukuphepha kwayo). Yona...Funda kabanzi -
Iyini indima ye-sodium hydrosulfite emicu yezindwangu?
Imicu efaneleko ye-sodium hydrosulfite isodiyamu ye-hydrosulfite ilungele imicu ehlukileko yezindwangu, kungebangelo ibizo layo elithi "Rongalite." Lokha nayisetjenziselwa ukutjhisa okuphezulu nofana ukususa amabala, imicu yetjhila kufanele ikghone ukujamelana namazinga womtjhiso aphezulu ngaphandle kokulimala. Ngokuya kwesitifiketi...Funda kabanzi -
Ngiziphi iingozi ze-sodium hydrosulfite?
I-sodium hydrosulfite inobuthi begodu ingacasula amehlo ne-mucosa yendlela yokuphefumula. Isetjenziswa khulu embonini yeentjhila ukudaya, ukuhlanza, ukugadangisa, ukususa umbala, nokuhlanza isilika, uboya, inayiloni, nezinye iindwangu. Njengombana inganazo iinsimbi ezisindako, iindwangu ezihlanjululwe nge...Funda kabanzi -
Kuzokwenzekani nangabe i-sodium hydrosulfite ivezwa emoyeni?
Lokha nayivezwa emoyeni, i-sodium hydrosulfite idonsa lula i-oksijini bese iyakhiqiza i-oksijini. Godu imunya umswakama, yenza ukutjhisa begodu irholele ekuwohlokeni. Ingahlangana ndawonye ngesikhathi idonsa i-oksijini yommoya bese ikhipha iphunga elinamandla le-esidi. Na₂S₂O₄ + 2H₂O + O₂ → 2NaHSO₄ + 2[H] Ukutjhisa nofana ukuvezwa...Funda kabanzi -
Ngiziphi iimfanelo ze-sodium hydrosulfite?
I-sodium hydrosulfite Iimpawu ezibonakalako I-sodium hydrosulfite ihlukaniswe njenge-Grade 1 into evuthako, eyaziwa nangokuthi yi-sodium dithionite. Itholakala ngeendlela ezimbili: ene-hydrated (Na2S2O4·2H2O) kanye ne-anhydrated (Na2S2O4). Ifomu enemanzini ivela njengekristalu emhlophe encani...Funda kabanzi