Ngā Pūrongo
-
Me pēhea te whakarāpopototanga o te bisphenol A BPA?
He Tirohanga Whānui mō te Bisphenol A BPA I hangaia tuatahitia i te tau 1936 hei estrogen hangai, inaianei kua hangaia te bisphenol A (BPA) me te nui ake i te 6 piriona pauna i ia tau. Ko te Bisphenol A BPA te mea e whakamahia whānuitia ana hei poraka hanga mō ngā kirihou polycarbonate, e kitea ana i roto i ngā hua pēnei i te pēpi...Pānuihia atu -
He aha ngā whakamahinga o te bisphenol A i muri mai?
te polycarbonate me te epoxy resins. E whakamahia ana hoki i roto i te hanga o ngā kirihou hangarau matua pērā i te polysulfone, me te tetrabromobisphenol A, e whakamahia whānuitia ana hei ārai mura. Ko te Polycarbonate (te kaihoko nui rawa atu o te bisphenol A) he mea kore reka, kore kakara, kore paitini, ā, ka taea te whakawhiti...Pānuihia atu -
He aha te whakamahinga o te bisphenol A BPA?
E whakamahia whānuitia ana te Bisphenol a bpa i roto i te hanga o ngā rauemi polymer, pērā i ngā kapia epoxy, ngā polycarbonates, ngā polysulfones, ngā kapia phenolic unsaturated, ngā kapia polyphenylene ether, ngā pūhui polyaryl, ngā polyetherimides, ngā tetrabromobisphenol A, ngā whakaū wera PVC, ngā antioxidants rapa, ngā mahi ahuwhenua...Pānuihia atu -
He aha te pūwāhi koropupū o te bisphenol A?
Ko te Bisphenol A (BPA), e mōhiotia ana ko te diphenylolpropane, ko te (4-hydroxyphenyl)propane rānei, ka hanga i ngā tioata prismatic i roto i te etanoru waimeha me ngā tioata rite ki te ngira i roto i te wai. He mura, ā, he kakara phenolic ngawari. Ko tōna ira rewa ko 157.2°C, ko te ira mura ko 79.4°C, ā, ko te ira kohua o te bisphenol a ko 2...Pānuihia atu -
He aha te Bisphenol A?
Ngā Mōhiotanga Taketake mō te Bisphenol A (bpa) Ko te Bisphenol A, e mōhiotia ana ko te BPA, he matū waro kei roto ko te tātai ngota C₁₅H₁₆O₂. I roto i te ahumahi, e whakamahia ana i roto i te hanga rauemi pēnei i te polycarbonate (PC) me ngā kapia epoxy. Mai i te tekau tau atu i 1960, kua whakamahia te BPA i roto i te hanga kirihou...Pānuihia atu -
Me pēhea te whakahaere i te tango tae konutai hydrosulfite?
Tikanga Tango Parauri Ā-Rohe mō ngā Kākahu Mā Tikanga Whakamākūkū i te Kapu Sodium Hydrosulfite Mena he parauri ā-rohe, whakamahia he kapu kua whakamākūkūhia hei whakamakūkū. Ringihia he nui o te wai wera (neke atu i te 90°C) ki roto i te kapu. Tāpirihia te Sodium Hydrosulfite (te kukū tata ki te 2.5%) ka whakaoho kia memeha. Rukuhia...Pānuihia atu -
He aha ngā āhua o te noho o te konutai dithionite?
Ngā Āhuatanga Ā-tinana: Ko te konutai dithionite he matū mura o te Tau 1. E mōhiotia ana hoki ko te Rongalite. I roto i te hokohoko, e rua ōna āhua: Na₂S₂O₄·2H₂O me te Na₂S₂O₄ korewai. Ko te mea tuatahi he tioata ma, ko te mea tuarua he paura kōwhai mārama. Ko tōna matotoru whanaunga ko...Pānuihia atu -
Kaihoko Whakaiti: Hauwaihāriki Konutai
Kaihoko Whakaiti: Sodium Hydrosulfite Ingoa Matū: Sodium dithionite. Ki te whakatauritea ki ngā kaihoko whakahāngai, he iti ake te kino o te sodium hydrosulfite ki ngā papanga. Ka taea te whakamahi ki ngā papanga i hangaia mai i ngā muka rerekē me te kore e kino, nō reira te ingoa "hydrosulfite" (e tohu ana i tōna haumaru). E...Pānuihia atu -
He aha te mahi a te konutai hauwaiwhāwhā i roto i ngā muka kakahu?
Ngā muka e tika ana mō te konutai hauwai-sulfite He pai te konutai hauwai-sulfite mō ngā momo muka kakahu, nō reira i tapaina ai ko "Rongalite." Ina whakamahia mō te whakama i te pāmahana teitei, mō te tango paru rānei, me kaha ngā muka kakahu ki te tu atu i ngā pāmahana teitei me te kore e pakaru. Mō te tiwhikete...Pānuihia atu -
He aha ngā tūponotanga o te konutai hauwai-sulfite?
He paitini te konutai hauwaiorawhite, ā, ka taea te whakapōrearea i ngā kanohi me te kiriuhi o te ara manawa. He whānuitia te whakamahinga i roto i te umanga kakahu mō te whakaiti i te tae, te whakaiti i te horoi, te tā, te tango tae, me te whakama i te hiraka, te huruhuru hipi, te nairona, me ētahi atu papanga. Nā te mea kāore he konganuku taumaha i roto, ka whakama ngā papanga ki...Pānuihia atu -
He aha ka tupu mēnā ka pāngia te hau e te hauwai hauwai konutai?
Ina pāngia e te hau, ka mimiti te konutai hauwaihāriki i te hāora, ā, ka waikura. Ka mimiti hoki i te makuku, ka whakaputa wera, ā, ka pirau. Ka taea e ia te piri tahi i a ia e mimiti ana i te hāora o te hau, ka puta he kakara waikawa kawa. Na₂S₂O₄ + 2H₂O + O₂ → 2NaHSO₄ + 2[H] Te whakamahana, te whakamātao rānei...Pānuihia atu -
He aha ngā āhuatanga ā-tinana o te hauwaihau konutai?
Ngā Āhuatanga Ā-tinana o te konutai hauwaiwhā Ko te konutai hauwaiwhā he matū mura e aro ana ki te makuku, e mōhiotia ana ko te konutai dithionite. E rua ngā āhua e wātea ana i te hokohoko: he waihāwhā (Na₂S₂O₄·2H₂O) me te waikore (Na₂S₂O₄). Ko te āhua waihāwhā ka puta he tioata mā kikokore...Pānuihia atu