70 citations
,
June 1998 in “Polymer” This study found that permanent waving treatment partially disrupts the α-helical structure in human hair microfibrils, primarily during the initial reduction phase, rather than just affecting disulphide bonds.
60 citations
,
March 2021 in “Bioactive Materials” This study found that nanofibrous membranes containing PNA nanogels enhanced wound healing in mice by modulating reactive oxygen species levels, improving cell adhesion and proliferation.
52 citations
,
May 2006 in “Journal of Structural Biology” This study identified two key pentapeptide quasi-repeats in human keratin-associated proteins, which are similar to motifs found in sheep wool.
52 citations
,
February 2005 in “Biopolymers” In this study, chemical treatments during permanent hair straightening were found to randomize proteins in the cortex, aiding in the reconnection of disulfide bonds during oxidation.
51 citations
,
September 2012 in “Biomacromolecules” This study found that disulfide bonds in keratin increase its strength and toughness, with some loss of α-helical structure under load, highlighting their role in trichocyte α-keratin's mechanical properties.
47 citations
,
January 2017 in “RSC Advances” Keratin peptides can change hair shape gently without harsh chemicals.
45 citations
,
December 2006 in “Biopolymers” This study found that permanent waving treatment induces structural changes in the cortex proteins of white human hair, significantly reducing its tensile strength without altering the S-S band intensity.
36 citations
,
October 2014 in “Langmuir” This study concluded that bleach treatment partly transforms the hydrophobic top layer of human hair cuticles into a hydrophilic surface with clustered cysteic acid, visualized at the nano-scale using dynamic Chemical Force Microscopy.
30 citations
,
January 2009 in “The scientific world journal/TheScientificWorldjournal” This article reviews methods for dissolving hair proteins and describes how solvents and molecules with hydrophobic groups interact with hair; it presents no new research findings.
29 citations
,
August 2005 in “Biopolymers” In this study, researchers found that L-cysteine interacted electrostatically with anionic ions on the surface of keratin fibers in human hair, reducing the rate of disulfide bond disconnection at pH 9.0.
25 citations
,
May 2019 in “Heliyon” This study found that excessive heat caused the most significant structural changes in hair from Caucasian and Afro samples, especially when combined with other treatments like bleaching and straightening.
25 citations
,
December 2011 in “Surface and interface analysis” This study reports that hair damage from bleaching is associated with the oxidative cleavage of fatty acid thioester bonds, detectable by measuring the decrease in mass spectrometry peak at m / z 76.
24 citations
,
October 2019 in “Genes” In this study, the identification of a novel KAP gene in sheep, named KRTAP36-1, was associated with increased prickle factor in wool, suggesting its potential as a genetic marker for breeding purposes.
24 citations
,
July 2017 in “Structure” In this study, researchers found that ligand homodimerization controls the receptor binding specificity of the FGF9 subfamily, preventing off-target activation of FGFR "b" isoforms.
22 citations
,
August 2019 in “Environmental research” This study found that the Pseudomonas sp. T5-6-I strain significantly increased selenium accumulation and root hair density in Brassica oleracea, highlighting its potential for phytoremediation and biofortification.
22 citations
,
November 2014 in “Proteins Structure Function and Bioinformatics” In this study, researchers mapped cysteine accessibility in wool keratins and KAPs, revealing that certain cysteines in keratin end domains and Types I and II rod domains are accessible and likely involved in forming disulfide bonds.
21 citations
,
February 2019 in “Experimental Dermatology” The authors conclude that optimizing hair shaft production and appearance may best be achieved by integrating biological, chemical, and physical intervention strategies.
20 citations
,
February 2017 in “European journal of pharmaceutical sciences” This study found that the cocrystal of mycophenolic acid with isonicotinamide significantly improved solubility and dissolution rate, while two other cocrystals showed decreased performance in these areas.
20 citations
,
December 2012 in “Journal of molecular structure” This study found that at pH 9.0, CYS penetrated less and caused less damage to virgin human hair than TG because it barely reached the cortex region.
19 citations
,
January 2009 in “International review of cell and molecular biology” This review explains the mechanical composition and molecular interactions that determine hair's mechanical properties, without providing any new experimental findings.
18 citations
,
January 2018 in “Advances in experimental medicine and biology” This review discusses the evolutionary history of keratins and reports no new results, highlighting key events that contributed to the development of mammalian hair and integument.
18 citations
,
January 2008 in “Sen'i Gakkaishi” This study observed that repeated perm treatments decrease disulfide bonds in hair due to their conversion largely into cysteic acid, affecting the waving efficiency depending on the reduction agent used.
17 citations
,
January 1999 in “Journal of Molecular Structure” This study determined the molecular structure of finasteride and its related crystalline forms, highlighting different hydrogen-bond interactions and structural configurations in various crystalline complexes.
16 citations
,
January 2017 in “Physical chemistry chemical physics/PCCP. Physical chemistry chemical physics” This study presents computational modeling and experimental analysis of the HGT protein KAP8.1, identifying key structural features that may influence hair's response to environmental conditions.
16 citations
,
July 2015 in “Journal of Molecular Structure” This study comprehensively compared different crystalline forms of finasteride, including the new finasteride DMF solvate hemihydrate, to better understand their structural characteristics and intermolecular interactions.
15 citations
,
January 1992 in “Sen'i Gakkaishi” This study suggests that the cell membrane complex in hair cuticles contains hydrophilic regions with disulfide bonds allowing polymer uptake and hydrophobic lamella-like lipid layers.
14 citations
,
September 2016 in “Journal of Photochemistry and Photobiology B Biology” This study observed that mercury-lamp irradiation may cause cleavage of disulfide bonds in keratins of white hair, leading to the formation of thiols in laboratory settings.
13 citations
,
May 2016 in “International journal of biological macromolecules” This study demonstrated that molecular dynamics simulations of keratin could effectively model the mechanical properties of hair, aligning well with experimental data, especially when conducted in vacuum conditions.
13 citations
,
September 2014 in “Journal of photochemistry and photobiology. B, Biology” This study found that UV radiation exposure increased protein elution and altered protein characteristics in hair fibers, suggesting environmental factors impact hair shaft proteins.
13 citations
,
March 2010 in “International Journal of Cosmetic Science” This study used nanoscale secondary ion mass spectrometry to locate where calcium and copper are concentrated in colored hair, finding these metals particularly in the cuticle's sulfur-rich regions.