Njengoko nabani na owakhe wazilungisa iinwele zakhe esazi, amanzi lutshaba.Iinwele ezizolulwe ngobuchule bubushushu ziya kubuyela umva kwii-curls ngomzuzu zichukumisa amanzi.Ngoba?Kuba iinwele zinenkumbulo yokumila.Iimpawu zayo eziphathekayo zivumela ukuba utshintshe imilo ekuphenduleni i-stimuli ethile kwaye ubuyele kwisimo sayo sokuqala ekuphenduleni abanye.
Bekunokuthini ukuba ezinye izinto, ngakumbi iimpahla ezilukiweyo, bezinolu hlobo lwenkumbulo yokumila?Yiba nomfanekiso-ngqondweni wesikipa esineendawo zokupholisa ezivulekayo xa zibekwe kubumanzi kwaye zivaliwe xa zomile, okanye iimpahla ezinobukhulu obunye ezilingana okanye ezicuthekayo ukuya kwimilinganiselo yomntu.
Ngoku, abaphandi baseHarvard John A. Paulson School of Engineering and Applied Sciences (SEAS) baye baphuhlisa izinto ezihambelana ne-biocompatible ezinokuthi zibe yi-3D-iprintwe kuyo nayiphi na imilo kwaye icwangciswe kwangaphambili kunye nememori yokubuyisela umva.Izinto eziphathekayo zenziwe kusetyenziswa i-keratin, iprotheni ene-fibrous efumaneka kwizinwele, iinzipho kunye namaqokobhe.Abaphandi bakhuphe ikeratin kuboya be-Agora obushiyekileyo obusetyenziswa ekwenzeni ilaphu.
Uphando lunokunceda umzamo obanzi wokunciphisa inkunkuma kwishishini lefashoni, enye yezona zinto zingcolisa umhlaba.Sele, abaqulunqi abafana noStella McCarthy bacinga kwakhona indlela ishishini elisebenzisa ngayo izixhobo, kubandakanya uboya.
"Ngale projekthi, sibonisile ukuba asinakuphinda sisebenzise uboya kuphela kodwa sinokwakha izinto ngoboya obusetyenzisiweyo obungazange bucingelwe ngaphambili," utshilo uKit Parker, uNjingalwazi weNtsapho yeTarr yeBioengineering kunye neApplied Physics kwiSEAS kunye nabadala. umbhali wephepha.“Iimpembelelo zokuzinza kobutyebi bendalo zicacile.Ngeprotein yekeratin ehlaziyiweyo, sinokwenza kanye, okanye ngaphezulu, kunoko bekusenziwa ngokucheba izilwanyana ukuza kuthi ga ngoku kwaye, ngokwenjenjalo, sinciphise impembelelo yemekobume yoshishino lwamalaphu nefashoni.”
Uphando lupapashwe kwiMathiriyeli yeNdalo.
Isitshixo kubuchule bokutshintsha ubume bekeratin sisakhiwo sayo sobume, utshilo uLuca Cera, ugxa wangemva kwe-SEAS kunye nombhali wokuqala wephepha.
Ikhonkco elinye le-keratin licwangciswe kwisakhiwo esifana nentwasahlobo eyaziwa ngokuba yi-alpha-helix.Amabini kula matsheyina ajijwa kunye ukuze enze isakhiwo esaziwa ngokuba yikhoyili ebhijelweyo.Uninzi lwala mabhiyibhile ajijekileyo adityaniswa abe yiprotofilaments kwaye ekugqibeleni ibe yimicu emikhulu.
"Umbutho we-alpha helix kunye neebhondi zeekhemikhali ezidibeneyo zinika izinto eziphathekayo zombini amandla kunye nememori," watsho uCera.
Xa i-fiber isoluliwe okanye ibonakaliswe kwi-stimulus ethile, izakhiwo ezifana ne-spring-spring ziyaqhawuka, kwaye iibhondi zilungelelaniswa ukuze zenze ii-beta-sheets ezizinzileyo.Ifiber ihlala ikuloo ndawo ide ivuswe ukuba ibuyele kwimo yayo yokuqala.
Ukubonisa le nkqubo, abaphandi be-3D-baprinte amaphepha e-keratin kwiintlobo ezahlukeneyo zeemilo.Bacwangcisa imilo esisigxina yezinto - imilo eya kuhlala ibuyela kuyo xa iqhutywe - usebenzisa isisombululo se-hydrogen peroxide kunye ne-monosodium phosphate.
Nje ukuba imemori isetiwe, iphepha lingaphinda licwangciswe kwaye libunjwe libe ziimilo ezintsha.
Ngokomzekelo, i-keratin sheet yasongwa yaba yinkwenkwezi ye-origami eyinkimbinkimbi njengemilo yayo esisigxina.Nje ukuba imemori isetiwe, abaphandi bafaka inkwenkwezi emanzini, apho yavela khona kwaye yaguquka.Ukusuka apho, baliqengqa eli phepha balifaka kumbhobho oqinileyo.Emva kokuba lomile, iphepha lalitshixiwe njengetyhubhu ezinzile kwaye esebenzayo.Ukuguqula inkqubo, babuyisela ityhubhu emanzini, apho ivule kwaye iphinde iphinde ibuyele kwinkanyezi ye-origami.
"Le nkqubo inamanyathelo amabini e-3D yoshicilelo lwemathiriyeli kunye nokuseta iimilo zayo ezisisigxina ivumela ukwenziwa kweemilo ezintsonkothileyo ngokwenene ezineempawu zesakhiwo ukuya kwinqanaba le-micron," utshilo uCera."Oku kwenza ukuba imathiriyeli ilungele uluhlu oluninzi lwezicelo ukusuka kwilaphu ukuya kubunjineli beethishu."
"Nokuba usebenzisa iintsinga ezinje ukwenza iibrassieres ezinobungakanani bekomityi kunye nokumila okunokwenziwa ngokwezifiso yonke imihla, okanye uzama ukwenza amalaphu asebenzayo kunyango lwezonyango, amathuba omsebenzi kaLuca abanzi kwaye anika umdla," utshilo uParker."Siyaqhubeka nokucinga ngokutsha amalaphu ngokusebenzisa iimolekyuli zebhayoloji njengeenxalenye zobunjineli njengoko zingazange zisetyenziswe ngaphambili."
Ixesha lokuposa: Sep-21-2020