Sesikhulume kaningi ngama-greats Izinzuzo zokuncelisaikakhulukazi kusuka ku- ukuncelisa isikhathi eside ukuncelisa ibele kuphela. Izifundo eziningi zenziwe kulokhu futhi, kuze kube manje, konke okutholakele kwakuyizinzuzo. Kodwa-ke manje ucwaningo luthi ubisi lwebele ludlulisa izinto ezinobuthi ezinganeni ezincelisayo.
Ngaphambi kokuqhubeka nokuchaza iziphetho zalolu cwaningo, ngifuna ukukucacisa lokho Lokhu kuthiwa kungubuthi akubangelwa ubisi uqobo, kodwa kungenxa yenani lobuthi bemikhiqizo nezinto sonke esichayeke kuzo.. Ngokombono wami, lolu lwazi alwethusi ngokweqile, okungenani aludluli idatha etholwe ngokutadisha kahle ubuthi bemikhiqizo esizungezile, siqala ngamanzi ompompi. Uma sikhathalela ngempela ngalesi sihloko, ngikubona kubaluleke kakhulu ukucabanga ngenani lezithasiselo, udayi namafutha e-hydrogenated esiwadlayo futhi - ngokuvamile - angafinyelelwa yizingane. Kepha ake sikhulume ngesifundo. Qhubeka ufunde, ngoba awunadoti.
Thola ukugxila okuphezulu kwama-plefuorates obisini lwebele
Iqembu labacwaningi baseBoston University, e-United States, likukhombisile lokhoEzinye izinhlanganisela zamakhemikhali ezibizwa ngokuthi yi-perfluorinated (PFC), ezitholakala ezintweni zokuhlanza nasemikhiqizweni engeyona eyezinduku futhi ngokuvamile zingena emzimbeni ngamanzi, zingadluliselwa zisuka komama ziye ezinganeni ngokuncelisa.
Lawa ma-ejenti asetshenziswa kaningi ezintweni zokuhlanza, izinyibilikisi, embonini yeTeflon yezitsha zasekhishini ku-velcro ngisho nakwezinye izihlanganisi noma iziqukathi. Ama-agent athi, lapho ethintana namanzi, agcina engena emzimbeni, abangele ukushintsha kwezinhlelo zomzimba, zokuzala kanye ne-endocrine system.
Noma kunjalo, imiphumela yalo msebenzi ishicilelwe kumagazini Isayensi Yezemvelo Nobuchwepheshe, kukhombisa ukuthi ukutholakala kwama-PFC kuyanda inyanga nenyanga phakathi kwamaphesenti angama-20 kuye kwangama-30 ezinganeni ezincelisa ibele.
"Besazi ukuthi amanani amancane ama-PFC angavela obisini lwebele, kodwa ukuhlolwa kwegazi okulandelanayo esikwenzile manje kuveza ukwanda kwezingane ngenkathi zincelisa," Kusho uPhilippe Grandjean, umcwaningi eHarvard Chan School nomunye wababhali bomsebenzi ngokubambisana namanyuvesi aseDenmark kanye neFaroese Hospital System (Faroe Islands).
Ukufika kule miphumela, abacwaningi balandela izingane ezingama-81 ezazalelwa e-Faroe Islands phakathi kuka-1997 no-2000, futhi bahlaziya ubukhona bezinhlobo ezinhlanu ze-PFC egazini labo lapho bezalwa futhi beneminyaka engu-11, izinyanga eziyi-18 nezinhlanu. iminyaka. Baphinde bahlola amazinga alezi zingxube komama bezingane esontweni lama-32 lokukhulelwa.
Ukuqoqwa kobuthi kuyanda njengoba ukuncelisa ibele kukhula isikhathi eside
Ucwaningo lukhombisa ukuthi ezinganeni ezazinceliswa ibele kuphela, ukugxila kwama-PFC egazini kukhuphuke phakathi kwamaphesenti angama-20 kuya kwangama-30 inyanga ngayinye. Endabeni yezingane ezixubene ne-lactation, lokhu kugxila akuzange kukhule kangako.
Ososayensi baveza ukuthi kokunye, ekugcineni kokuncelisa, amazinga okugxila e-PFC ku-serum yezingane adlula lawo omama babo. Kodwa-ke, uhlobo olulodwa lwekhompiyutha, ikakhulukazi i-perfluorohexanesulfonic (PFHx), alunyuki ngokuncelisa.
Yize iziphetho zocwaningo ziphakamisa ukuthi ubisi lwebele luwumthombo obalulekile wokuchayeka kulezi zinto ezinobuthi ngesikhathi sobuntwana, Abaphenyi baphawula ukuthi uma abesifazane beyeka ukuncelisa, ukugxila kwezinhlobo ezinhlanu ze-PFC kuyehla ezinganeni.
"Asikukhuthazi ukuncelisa ibele, kodwa sikhathazekile ngokuthi lokhu kungcola kudluliswa kusuka kwesinye isizukulwane kuya kwesinye sisencane kakhulu," Kuphetha uGrandjean.
Ukuncelisa ibele okungenabuthi
Njengoba ngakutshela ekuqaleni, Ukuncelisa ubisi lwebele kungenxa yokuchayeka kumakhemikhali athile adlulela ebisini lwebele. Ngakho-ke, kungenzeka ukuthi ucabange ukuthi, ngokuzenzisa, indlela yokudla kanye ne indlela yokuphila engenazo izinto ezinobuthi Kungalungisa hhayi le nkinga yobisi lwebele kuphela, kepha nezinye izinkinga eziningi zempilo.
Uma lezi zindaba zikwethusa, yisikhathi esihle sokuqala ukuhlaziya yonke into oyidlayo kanye namakhemikhali oziveza kuwo, ngoba ukube abengekho emzimbeni wakho abengeke adlulisele enganeni yakho. Futhi ungakhohlwa ukuqhubeka uhlaziya kahle yonke imikhiqizo oyinikeza ingane yakho, kusuka emanzini kuya izithelo, inyama nenhlanzi, ngemikhiqizo enoshukela ocwengekile futhi ngaphandle kokukhohlwa amaswidi nemikhiqizo yezimboni enamafutha ayo.
Izithombe - zandisokuhle, Bejamin Magaña, u-jakecaptive