This paper explores the diverse patterns and social significance of Black hair, approaching it as an art form, mathematical pattern, and ethnomathematic entity, and seeks to dispel myths while highlighting its vast possibilities.
4 citations
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January 2015 in “Case reports in urology” This paper presents a case of penile tourniquet syndrome in an 8-year-old boy caused by his mother's hair coil, highlighting its rarity beyond infancy.
38 citations
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October 2011 in “Analytical biochemistry” This study used proteomic techniques to analyze human hair proteins, revealing keratin heterogeneity and identifying posttranslational modifications, such as cysteine trioxidation and methylation.
7 citations
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February 1998 in “Polymer journal” This study found that the stability of the coiled-coil structure in human hair keratin is maintained by ion-pairing and hydrophobic interactions, which are disrupted as pH approaches 7.0.
4 citations
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June 2022 in “Clinical, cosmetic and investigational dermatology” In this study, researchers introduced the Sanusi FUE Score Scale to better predict and grade the difficulty of follicular unit excision hair transplantation by accounting for diverse hair and skin types, with further validation needed.
2 citations
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June 2023 in “International Journal of Women’s Dermatology” This study investigated price differences and found that haircare products targeting coily/curly hair are more expensive than those for straight hair types, with the authors suggesting that pricing policies should be more equitable to ensure affordable access for all individuals.
January 2024 in “Indian Journal of Pharmaceutical Sciences” This study hypothesizes that the curling of hair may result from the contraction of the Arrector Pili Muscle, contributing to the diverse types of curly hair.
January 2024 in “Indian Journal of Pharmaceutical Sciences” This study hypothesizes that curly hair is shaped by the contraction of the Arrector Pili Muscle within the follicle, potentially modifiable through muscle-relaxing treatments, but further research is needed to confirm this mechanism.
September 2023 in “Journal of the American Academy of Dermatology” This study found that hair care products designed for coily/curly hair are significantly more expensive than those for straight hair, based on pricing data from Amazon.com. This indicates a need for equitable pricing to ensure access to affordable hair care for all hair types.
This study identified new geometric and mechanical parameters for curly and kinky/coily hair, which may inform more effective personal care products tailored to these hair types.
This study used quantitative methods to identify new geometric and mechanical parameters of curly and kinky/coily hair, aiming to improve classification and develop better personal care products for these hair types.
8 citations
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August 2018 in “Turkish journal of urology” This case report describes a 4-year-old boy with Penile Hair Tourniquet Syndrome caused by a hair coil, highlighting the importance of early diagnosis in circumcised boys to prevent severe complications.
49 citations
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June 2004 in “Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences” This study developed a multiscale model to understand human hair fiber mechanics and found that the yield stress decreases linearly with temperature, supported by both simulations and experimental stretching of hair fibers.
22 citations
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October 1996 in “Dermatologic clinics” This review summarizes recent advances in understanding intermediate filament structure and their implications for pathological mutations and human diseases, but it reports no new experimental results.
6 citations
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January 2019 in “The American Journal of Dermatopathology” This study discovered that adipose tissue infiltration at the isthmus level appears significantly more often in frontal fibrosing alopecia cases compared to controls, suggesting a potential role in the condition's pathology.
5 citations
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February 1998 in “Polymer” Human hair keratin has a 40% α-helix structure that changes to a random coil in 8 M urea.
April 2022 in “Research Square (Research Square)” In this case study, a rare scalp arteriovenous fistula developed after hair transplantation in a 29-year-old male was successfully treated using endovascular embolization with platinum coils, resulting in symptom resolution and complete fistula disappearance without complications.
December 2021 in “Journal of natural fibers” In this study, researchers developed enzymatic methods to isolate hair cuticle cells and remove the hair cuticle layer, finding that the harvested cuticle cells are thermally more stable and contain different structural proteins compared to descaled hair fibers.
45 citations
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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.
10 citations
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November 2013 in “Biochemistry and Molecular Biology Education” This review discusses the history, structure, and biological significance of keratins, including the crystal structure of a keratin helical segment, without reporting new experimental results.
4 citations
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January 2007 in “Sen'i Gakkaishi” This study found that permanent wave treatment accelerates hair degradation after protease exposure, showing significant morphological differences compared to untreated hair and linked to damage from Alpha-helical region denaturation.
1 citations
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June 2023 in “Journal of applied crystallography” This study utilized the DNP–SANS technique on human hair for the first time and found significant changes in the SANS profile dependent on polarization conditions, providing insights into the structural composition and dynamic properties of keratin and its associated proteins.
October 2024 in “Cosmetics” In this study, reducing agents like ammonium thioglycolate, L-cysteine, and sodium sulfite in shampoo effectively decreased hair flyaway and frizz without causing damage, as no critical hair damage was observed in structural and tensile strength assessments.
70 citations
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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.
37 citations
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October 2015 in “PeerJ” This study found that shampoo and conditioner do not alter hair's molecular structure, while perming treatments significantly affect keratin and intermediate filament structures due to bond alterations.
28 citations
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June 2007 in “Journal of Cutaneous Pathology” This study found that premature desquamation of the inner root sheath is a non-specific histologic feature in scarring alopecia and cannot be used alone to define central centrifugal cicatricial alopecia.
15 citations
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June 2012 in “British Journal of Dermatology” This study identified a novel KRT86 mutation associated with autosomal dominant monilethrix, expanding understanding of its genetic basis beyond known motifs.
14 citations
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September 2018 in “The journal of allergy and clinical immunology/Journal of allergy and clinical immunology/The journal of allergy and clinical immunology” In this study, a novel homozygous mutation in the STAT5B gene was identified in a 17-year-old boy with growth hormone-refractory growth failure, severe eczema, and autoimmune disease, suggesting a similarity to known STAT5B deficiency phenotypes.
January 2023 in “Annals of Dermatology” This study found that alopecia areata patients with a CCHCR1 gene variant had higher recurrence rates and structural abnormalities in hair compared to those without the variant.
6 citations
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January 2013 in “Urology” This case report describes an 8-year-old child with penile tourniquet syndrome due to a constricting thread, which led to partial distal penile amputation and required surgical intervention.