{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T20:59:46Z","timestamp":1780520386300,"version":"3.54.1"},"reference-count":58,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2025,12,13]],"date-time":"2025-12-13T00:00:00Z","timestamp":1765584000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,12,13]],"date-time":"2025-12-13T00:00:00Z","timestamp":1765584000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100018861","name":"Instituto Nacional de Ci\u00eancia e Tecnologia de Fluidos Complexos","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100018861","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001807","name":"Funda\u00e7\u00e3o de Amparo \u00e0 Pesquisa do Estado de S\u00e3o Paulo","doi-asserted-by":"publisher","award":["#2016\/24531\u20103"],"award-info":[{"award-number":["#2016\/24531\u20103"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["#303001\/2019\u20104"],"award-info":[{"award-number":["#303001\/2019\u20104"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["#307303\/2023\u20103"],"award-info":[{"award-number":["#307303\/2023\u20103"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002322","name":"Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002322","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Biopolymers"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>The deterioration of the cuticle and cortex hair due to routine cosmetic practices has been identified as a primary factor\u00a0contributing to undesirable changes in the esthetic qualities of hair. Chemical and physical treatments can cause significant damage to hair fibers. In this study, the damage induced by heating in chemically treated hair subjected to acid straightening, bleaching, and the combination of both treatments is investigated. Previous results published by our group\u00a0have already clarified certain aspects of the mechanism of action of acid straightening on hair fibers. In this new work, we show other relevant aspects to the hair care area with the aim to respond: how can we assist cosmetic product developers and consumers in understanding the changes caused by the combined use of chemical transformation procedures (specifically acid straightening and bleaching) and exposure to heat? By examining the thermal behavior of chemically treated hair fibers, we shed light on key aspects of both external (through Fourier transform infrared spectroscopy\u2013attenuated total reflectance [FTIR\/ATR] and scanning electron microscopy [SEM]) and internal (through ultra\u2010small angle x\u2010ray scattering [USAXS], small angle x\u2010ray scattering [SAXS], and wide\u2010angle x\u2010ray scattering [WAXS]) changes. SAXS and WAXS structural analyses provided information on the internal structure and hierarchical organization of hair samples. While these techniques have been widely used to evaluate hair fibers, the effects of heating on their structure have been less explored. We examined the changes in the hierarchical arrangements as the fibers were heated in\u00a0situ during the x\u2010ray scattering experiments. It was possible to evaluate the specific regions where heat causes damage to both the cortex and the cuticle of the hair fiber, and the extent of these damages. Furthermore, it was observed that the bleached and straightened fiber undergoes more changes with the use of heat, due to the loss of important surface components, as shown by FTIR and SEM measurements.<\/jats:p>","DOI":"10.1002\/bip.70071","type":"journal-article","created":{"date-parts":[[2025,12,13]],"date-time":"2025-12-13T10:43:48Z","timestamp":1765622628000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Thermal Induced Changes in Cuticle and Cortex to Chemically Treated Hair"],"prefix":"10.1002","volume":"117","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2352-1007","authenticated-orcid":false,"given":"C. R. R. C.","family":"Lima","sequence":"first","affiliation":[{"name":"Institute of Physics, University of S\u00e3o Paulo  S\u00e3o Paulo S\u00e3o Paulo Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7426-1508","authenticated-orcid":false,"given":"A. C. C.","family":"Bandeira","sequence":"additional","affiliation":[{"name":"Institute of Physics, University of S\u00e3o Paulo  S\u00e3o Paulo S\u00e3o Paulo Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7062-5669","authenticated-orcid":false,"given":"T. S.","family":"Martins","sequence":"additional","affiliation":[{"name":"Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of S\u00e3o Paulo  S\u00e3o Paulo S\u00e3o Paulo Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6078-229X","authenticated-orcid":false,"given":"L.","family":"Otubo","sequence":"additional","affiliation":[{"name":"Institute for Energy and Nuclear Research  S\u00e3o Paulo S\u00e3o Paulo Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3426-6507","authenticated-orcid":false,"given":"C. L. P.","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Institute of Physics, University of S\u00e3o Paulo  S\u00e3o Paulo S\u00e3o Paulo Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,12,13]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1107\/S1600576723005599"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-25611-0"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.3390\/cosmetics6020031"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.15230\/SCSK.2012.38.2.139"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-15901-5"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1097-4628(19980620)68:12<1991::AID-APP13>3.0.CO;2-V"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1002\/1097\u20100282(20010415)58:5<526::aid\u2010bip1028>3.0.co;2\u2010l"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/s0006\u20103495(02)75572\u20100"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-981-10-8195-8"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1590\/s1984\u201082502009000100019"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/bip.20453"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1002\/bip.20221"},{"key":"e_1_2_9_14_1","unstructured":"M.Gamez\u2010GarciaandJ.Basilan \u201cThe Use of Image Analysis to Assess the Role of Polymers on the Thermal Protection of Asian Hair \u201d2019."},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1159\/000514367"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.abdp.2022.01.006"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/jocd.13006"},{"key":"e_1_2_9_18_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMc2400528"},{"key":"e_1_2_9_19_1","doi-asserted-by":"publisher","DOI":"10.1107\/s1600576716000455"},{"key":"e_1_2_9_20_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-540-95968-7_11"},{"key":"e_1_2_9_21_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp0467494"},{"key":"e_1_2_9_22_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp0559332"},{"key":"e_1_2_9_23_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsb.2019.04.004"},{"key":"e_1_2_9_24_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.molliq.2021.118097"},{"key":"e_1_2_9_25_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsomega.3c03500"},{"key":"e_1_2_9_26_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevA.44.8264"},{"key":"e_1_2_9_27_1","unstructured":"D.Istrate \u201cHeat Induced Denaturation of Fibrous Hard Alpha\u2010Keratins and Their Reaction With Various Chemical Reagents\u201d(PhD thesis RWTH Aachen 2011)."},{"key":"e_1_2_9_28_1","doi-asserted-by":"publisher","DOI":"10.1111\/jocd.12892"},{"key":"e_1_2_9_29_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jaap.2011.03.003"},{"key":"e_1_2_9_30_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsb.2011.09.014"},{"key":"e_1_2_9_31_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp8094616"},{"key":"e_1_2_9_32_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.polymdegradstab.2012.12.001"},{"key":"e_1_2_9_33_1","doi-asserted-by":"publisher","DOI":"10.3390\/cosmetics9060124"},{"key":"e_1_2_9_34_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemphyslip.2008.05.175"},{"key":"e_1_2_9_35_1","doi-asserted-by":"publisher","DOI":"10.1111\/ics.12061"},{"key":"e_1_2_9_36_1","doi-asserted-by":"publisher","DOI":"10.1016\/s0304\u20104165(02)00538\u2010x"},{"key":"e_1_2_9_37_1","doi-asserted-by":"publisher","DOI":"10.7717\/peerj.619"},{"key":"e_1_2_9_38_1","volume-title":"A Forensic Investigation of Single Human Hair Fibres Using FTIR\u2010ATR Spectroscopy and Chemometrics","author":"Barton P. M. J.","year":"2011"},{"key":"e_1_2_9_39_1","doi-asserted-by":"publisher","DOI":"10.7717\/peerj.1296"},{"key":"e_1_2_9_40_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.msec.2016.12.008"},{"key":"e_1_2_9_41_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600\u20100625.2010.01097.x"},{"key":"e_1_2_9_42_1","doi-asserted-by":"publisher","DOI":"10.1038\/srep17347"},{"key":"e_1_2_9_43_1","volume-title":"Elements of X\u2010Ray Diffraction","author":"Cullity B. D.","year":"2001"},{"key":"e_1_2_9_44_1","doi-asserted-by":"publisher","DOI":"10.1529\/biophysj.103.034694"},{"key":"e_1_2_9_45_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10973\u2010005\u20100051\u20109"},{"key":"e_1_2_9_46_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10973\u2010015\u20105070\u20106"},{"key":"e_1_2_9_47_1","first-page":"2454","article-title":"FTIR\u2010ATR Spectroscopic Technique on Human Single Intact Hair Fibre\u2014A Case Study of Thyroid Patients","volume":"2","author":"Sundaram K.","year":"2016","journal-title":"International Journal of Advanced Scientific Technologies in Engineering and Management Sciences"},{"key":"e_1_2_9_48_1","volume-title":"Infrared Spectral Interpretation: A Systematic Approach","author":"Smith B. C.","year":"1998"},{"key":"e_1_2_9_49_1","doi-asserted-by":"publisher","DOI":"10.1039\/d1an00695a"},{"key":"e_1_2_9_50_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0738\u2010081X(01)00201\u20102"},{"key":"e_1_2_9_51_1","doi-asserted-by":"publisher","DOI":"10.1111\/srt.13733"},{"key":"e_1_2_9_52_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cis.2021.102383"},{"key":"e_1_2_9_53_1","doi-asserted-by":"publisher","DOI":"10.1140\/epjst\/e2020\u2010900217\u20104"},{"key":"e_1_2_9_54_1","doi-asserted-by":"publisher","DOI":"10.1021\/la500461y"},{"key":"e_1_2_9_55_1","doi-asserted-by":"publisher","DOI":"10.1520\/JFS16137J"},{"key":"e_1_2_9_56_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00114\u2010024\u201001944\u20102"},{"key":"e_1_2_9_57_1","doi-asserted-by":"publisher","DOI":"10.1038\/jid.2011.195"},{"key":"e_1_2_9_58_1","doi-asserted-by":"crossref","unstructured":"S.Rao D.Jain J.Gaur andR.Verma \u201cA Rapid and Non\u2010Destructive Identification of Animal Hairs Using ATR\u2010FTIR and Chemometrics: A Proof\u2010of\u2010Concept for Wildlife Forensic Applications \u201d Problems of Forensic Sciences 138 (2024):137\u2013152.","DOI":"10.4467\/12307483PFS.24.009.20182"},{"key":"e_1_2_9_59_1","doi-asserted-by":"publisher","DOI":"10.3354\/esr00125"}],"container-title":["Biopolymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/bip.70071","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/bip.70071","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/bip.70071","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,16]],"date-time":"2026-01-16T16:50:38Z","timestamp":1768582238000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/bip.70071"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,12,13]]},"references-count":58,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,1]]}},"alternative-id":["10.1002\/bip.70071"],"URL":"https:\/\/doi.org\/10.1002\/bip.70071","archive":["Portico"],"relation":{},"ISSN":["0006-3525","1097-0282"],"issn-type":[{"value":"0006-3525","type":"print"},{"value":"1097-0282","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,12,13]]},"assertion":[{"value":"2025-06-04","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-11-24","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-12-13","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e70071"}}