Indlela yokuhlaziya inoveli, ebonakala ngokucaciswa okuphezulu nokuzwela okuqinile, iye yathuthukiswa ngempumelelo ukuze kunqunywe i-4,4′-methylene-bis-(2-chloroaniline), eyaziwa ngokuthi “MOCA,” emchameni womuntu. Kubalulekile ukuqaphela ukuthi i-MOCA iyi-carcinogen ebhalwe kahle, enobufakazi be-toxicological obumisiwe obuqinisekisa ukuthi i-carcinogenicity ezilwaneni zaselabhorethri ezifana namagundane, amagundane, nezinja.
Ngaphambi kokusebenzisa le ndlela esanda kuthuthukiswa ezindaweni zokusebenza zomhlaba wangempela, ithimba labacwaningi liqale lenze ucwaningo lokuqala lwesikhashana lisebenzisa amagundane. Inhloso eyinhloko yalolu cwaningo lwangaphambi komtholampilo kwakuwukubona nokucacisa izici ezithile ezibalulekile ezihlobene nokukhipha umchamo we-MOCA esifanekisweni sesilwane—kuhlanganise nezici ezifana nesilinganiso sokuphuma kwegazi, izindlela ze-metabolic, kanye newindi lesikhathi lamazinga aqaphelekayo—ukubeka isisekelo esiqinile sesayensi sokusetshenziswa okulandelayo kwendlela kumasampula omuntu.
Ngemva kokuphothulwa nokuqinisekiswa kocwaningo lwangaphambi komtholampilo, le ndlela yokuthola esekelwe emchameni yasetshenziswa ngokusemthethweni ukuze kuhlolwe izinga lokuchayeka emsebenzini ku-MOCA phakathi kwabasebenzi ezinkampanini zezimboni zaseFrance. Ububanzi bocwaningo buhlanganisa izinhlobo ezimbili eziyinhloko zezimo zomsebenzi ezisondelene kakhulu ne-MOCA: enye kwakuyinqubo yokukhiqiza yezimboni ye-MOCA ngokwayo, kanti enye yayiwukusetshenziswa kwe-MOCA njenge-ejenti elaphayo ekukhiqizeni ama-polyurethane elastomers, isimo esivamile sokusetshenziswa ezimbonini zamakhemikhali nezinto zokwakha.
Ngokuhlolwa okukhulu kwamasampula omchamo aqoqwe kubasebenzi kulezi zimo, ithimba locwaningo lithole ukuthi amazinga okuphuma komchamo we-MOCA abonisa ukuhlukahluka okubanzi. Ngokuqondile, ukugxilwa kokukhipha kuhluka kusuka kumazinga angabonakali-achazwe ngaphansi kuka-0.5 microgram ilitha-kuya ku-1,600 micrograms ilitha. Ukwengeza, lapho ama-metabolites e-N-acetyl e-MOCA ekhona kumasampula omchamo, ukugxila kwawo kwakulokhu kuphansi futhi kuphansi kakhulu kunokugxilisa kwenhlanganisela yomzali (MOCA) kumasampula afanayo, okubonisa ukuthi i-MOCA ngokwayo iwuhlobo oluyinhloko olukhishwa emchamweni kanye nenkomba ethembeke kakhudlwana yokuchayeka.
Sekukonke, imiphumela etholwe kulokhu kuhlola okukhulu kokuchayeka emsebenzini ibonakale iveza ngokufanelekile nangokunembile amazinga okuchayeka e-MOCA ezisebenzi ezihlolisisiwe, njengoba amazinga atholakele endle ayehlotshaniswa eduze nemvelo yomsebenzi wabo, ubude besikhathi sokuchayeka, kanye nezimo zendawo yokusebenza. Ngaphezu kwalokho, ukuqaphela okubalulekile okuvela ocwaningweni kwakuwukuthi ngemva kokunqunywa kokuhlaziywa sekuqediwe futhi izinyathelo zokuvimbela ezihlosiwe zasetshenziswa ezindaweni zokusebenza-njengokuthuthukisa izinhlelo zokungena komoya, ukuthuthukiswa kokusetshenziswa kwemishini yokuzivikela (PPE), noma ukuthuthukisa ukusebenza kwenqubo-amazinga okukhishwa komchamo we-MOCA kubasebenzi abathintekayo ngokuvamile abonisa ukwehla okusobala nokuphawulekayo kokunciphisa okusebenzayo kokunciphisa ukungenelela okusebenzayo. ukuchayeka ku-MOCA.
Isikhathi sokuthumela: Oct-11-2025