Njengoba noma ubani oke walungisa izinwele zakhe azi, amanzi ayisitha.Izinwele eziqondiswe ngokucophelela ngenxa yokushisa zizobuyela emuva zibe ama-curl ngomzuzu lapho zithinta amanzi.Kungani?Ngoba izinwele zinenkumbulo yomumo.Izakhiwo zayo ezibonakalayo ziyivumela ukuthi iguqule isimo ngokuphendula izisusa ezithile futhi ibuyele esimweni sayo sangempela ekuphenduleni kwabanye.
Kuthiwani uma ezinye izinto, ikakhulukazi izindwangu, zinalolu hlobo lwenkumbulo yomumo?Cabanga ngesikibha esinezimbobo zokupholisa ezivuleka lapho sichayeke kumswakama futhi sivaleke lapho somile, noma ingubo elingana yonke into elula noma eshwabene ukuze ilingane nezilinganiso zomuntu.
Manje, abacwaningi base-Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) benze into evumelana ne-biocompatible engaphrintwa nge-3D ibe yinoma yimuphi umumo futhi ihlelwe kusengaphambili ngenkumbulo yomumo obuyiseleka emuva.Impahla yenziwa kusetshenziswa i-keratin, iphrotheni ene-fibrous etholakala ezinweleni, izinzipho namagobolondo.Abacwaningi bakhiphe i-keratin kuboya be-Agora obusele obusetshenziswa ekwenzeni izindwangu.
Ucwaningo lungasiza umzamo obanzi wokunciphisa imfucuza embonini yezemfashini, enye yezinto ezingcolisa kakhulu emhlabeni.Kakade, abaklami abafana noStella McCarthy bacabanga kabusha ukuthi imboni isebenzisa kanjani izinto zokwakha, okuhlanganisa uvolo.
“Ngale phrojekthi, sikhombisile ukuthi asikwazi nje kuphela ukuvuselela uvolo kodwa singakwazi ukwakha izinto ngoboya obugaywe kabusha obungakaze bucatshangwe ngaphambili,” kusho uKit Parker, uProfesa Womndeni wakwaTarr weBioengineering and Applied Physics kwaSEAS kanye nabadala. umbhali wephepha.“Imiphumela yokusimama kwemithombo yemvelo icacile.Ngamaprotheni e-keratin agaywe kabusha, singenza okuningi, noma ngaphezulu, kunalokho osekwenziwe ukugunda izilwane kuze kube manje, futhi ngokwenza kanjalo, sinciphise umthelela wemvelo wemboni yendwangu nemfashini.”
Ucwaningo lushicilelwe ku-Nature Materials.
Isihluthulelo samakhono okushintsha isimo sekeratin yisakhiwo sayo sokulandelana, kusho uLuca Cera, uzakwabo owaba ngudokotela kwaSEAS nombhali wokuqala wephepha.
Iketango elilodwa le-keratin lihlelwe laba isakhiwo esifana nentwasahlobo eyaziwa ngokuthi i-alpha-helix.Amabili ala maketango ayasonteka ukuze akhe isakhiwo esaziwa ngokuthi ikhoyili egoqiwe.Amakhoyili amaningi asongile ahlanganiswa abe ama-protofilament futhi ekugcineni abe imicu emikhulu.
"Inhlangano ye-alpha helix kanye namabhondi amakhemikhali axhumeneyo kunikeza izinto ezibonakalayo amandla kanye nenkumbulo yokuma," kusho uCera.
Uma ifayibha yeluliwe noma ivezwa kusivuseleli esithile, izakhiwo ezifana nentwasahlobo ziyaqaqa, futhi amabhondi aqondana kabusha ukuze akhe amashidi e-beta azinzile.I-fiber ihlala ikuleso simo kuze kube yilapho ishukunyiswa ukuba ibuyele esimweni sayo sokuqala.
Ukukhombisa le nqubo, abacwaningi banyathelisa amashidi e-keratin nge-3D ngezindlela ezihlukahlukene.Bahlela ukuma okuhlala njalo kwempahla - umumo eyohlala ibuyela kuwo uma icushiwe - besebenzisa isixazululo se-hydrogen peroxide ne-monosodium phosphate.
Uma inkumbulo isisethiwe, ishidi lingahlelwa kabusha futhi libunjwe libe yizimo ezintsha.
Ngokwesibonelo, ishidi elilodwa le-keratin lagoqwa laba inkanyezi ye-origami eyinkimbinkimbi njengokuma kwalo okuhlala njalo.Lapho inkumbulo isibekiwe, abacwaningi bafaka inkanyezi emanzini, lapho yavela khona futhi yaba lula.Basuka lapho, baligoqa ishidi balifaka epayipini eliqinile.Lapho lomile, ishidi lalikhiyelwa phakathi njengeshubhu elizinzile futhi elisebenza ngokugcwele.Ukuze bahlehlise le nqubo, babuyisela ishubhu emanzini, lapho laqaqa khona futhi lagoqwa laba yinkanyezi ye-origami.
"Le nqubo enezinyathelo ezimbili zokunyathelisa i-3D impahla bese ibeka izimo zayo ezihlala njalo ivumela ukwakhiwa kwezimo eziyinkimbinkimbi ngempela ezinezici zesakhiwo kuze kufike ezingeni le-micron," kusho u-Cera."Lokhu kwenza izinto ezisetshenziswayo zilungele uhla olukhulu lwezinhlelo zokusebenza kusuka kwendwangu kuya kobunjiniyela bezicubu."
“Kungakhathaliseki ukuthi usebenzisa imicu efana nale ukwenza ama-brassieres usayizi wenkomishi nokuma kwawo kungenziwa ngendlela oyifisayo nsuku zonke, noma uzama ukwenza izindwangu ezisebenzayo zokwelashwa kwezokwelapha, amathuba omsebenzi ka-Luca abanzi futhi ayajabulisa,” kusho uParker."Siyaqhubeka nokucabanga kabusha izindwangu ngokusebenzisa ama-molecule emvelo njengama-substrates obunjiniyela ngendlela angakaze asetshenziswe ngayo ngaphambili."
Isikhathi sokuthumela: Sep-21-2020