Uburyo bushya bwo gusesengura, burangwa no kuba bufite ubushobozi bwo gusesengura ibintu mu buryo bwihariye kandi bukagira ubushobozi bwo kumva ibintu neza, bwakozwe neza kugira ngo hamenyekane 4,4′-methylene-bis-(2-chloroaniline), izwi cyane nka "MOCA," mu nkari z'abantu. Ni ngombwa kumenya ko MOCA ari kanseri yemewe, ifite ibimenyetso by'uburozi byemeza ko itera kanseri mu nyamaswa zo muri laboratwari nk'imbeba, imbeba n'imbwa.
Mbere yo gukoresha ubu buryo bushya mu buzima busanzwe, itsinda ry’ubushakashatsi ryabanje gukora ubushakashatsi bw’ibanze bw’igihe gito rikoresheje imbeba. Intego nyamukuru y’ubu bushakashatsi mbere yo kuvura kwari ukumenya no gusobanura ibintu bimwe na bimwe by’ingenzi bifitanye isano no gusohora MOCA mu nkari mu buryo bw’inyamaswa—harimo ibintu nk’umuvuduko wo gusohora, inzira z’imikorere y’umubiri, n’igihe cyo kubona ingano y’ibipimo—kugira ngo hashyirweho urufatiro rukomeye rwa siyansi rw’ikoreshwa ry’ubu buryo mu bipimo by’abantu.
Nyuma yo kurangiza no kwemeza inyigo yakozwe mbere yo kuvurwa, ubu buryo bwo gupima inkari bwakoreshejwe ku mugaragaro kugira ngo harebwe urwego abakozi bo mu nganda zo mu Bufaransa bahura na MOCA mu kazi kabo. Ubu bushakashatsi bwakozwe ku bwoko bubiri bw'ingenzi bw'imirimo ifitanye isano rya hafi na MOCA: bumwe bwari uburyo MOCA ubwayo ikora mu nganda, ubundi bwari uburyo MOCA ikoresha nk'umuti uvura indwara mu gukora elastomer za polyurethane, ibintu bisanzwe bikoreshwa mu nganda zikora imiti n'ibikoresho.
Binyuze mu isuzuma rinini ry’inkari zakusanyijwe n’abakozi muri ibi bihe, itsinda ry’ubushakashatsi ryasanze urugero rwa MOCA mu nkari rwagaragaje itandukaniro rinini. By’umwihariko, urugero rw’inkari zasohokaga rwari hagati y’urugero rutagaragara—rwagenwe nka mikorogarama 0.5 kuri litiro—kugeza kuri mikorogarama 1.600 kuri litiro. Byongeye kandi, iyo metabolite za N-acetyl za MOCA zari mu nkari, urugero rwazo rwari ruhoraho kandi ruri hasi cyane ugereranyije n’urugero rw’inkari (MOCA) mu nkari zimwe, bigaragaza ko MOCA ubwayo ari yo shusho y’ibanze isohoka mu nkari kandi ikaba ikimenyetso cyizewe cy’uko yagaragaye.
Muri rusange, ibisubizo byavuye muri iri suzumabumenyi rinini ryakozwe ku kazi byagaragaye ko bigaragaza neza kandi neza urwego rusange rw’ibikorwa bya MOCA by’abakozi babajijwe, kuko urwego rw’ibikorwa byagaragaye byo gusohora amaraso rwari rufitanye isano rya hafi n’imiterere y’akazi kabo, igihe bamaze bahura n’ibibazo, n’imiterere y’aho bakorera. Byongeye kandi, ikintu cy’ingenzi cyavuye mu bushakashatsi ni uko nyuma y’uko ibyemezo by’isesengura birangiye kandi ingamba zo gukumira zigashyirwa mu bikorwa mu kazi—nk’uko kunoza uburyo bwo guhumeka, kongera ikoreshwa ry’ibikoresho byo kwirinda (PPE), cyangwa kunoza imikorere y’imikorere—urugero rw’ibikorwa bya MOCA byo gusohora amaraso mu nkari ku bakozi bagizweho ingaruka rwakunze kugaragaza igabanuka rigaragara kandi rikomeye, bigaragaza ko uburyo bwo kwirinda bugira ingaruka nziza mu kugabanya ibyago byo gusohora amaraso mu kazi kabo.
Igihe cyo kohereza: Ukwakira-11-2025