21 citations
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April 1990 in “Journal of comparative neurology” The study found that nerve signals are stronger when there are more connection points, but not necessarily denser, along the nerve's path in the spine.
Curly wool has more orthocortex than straight wool.
July 2018 in “Elsevier eBooks” Stopping tight hairstyles can prevent and reduce traction alopecia.
7 citations
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July 2025 in “The Journal of Physiology” C-tactile nerves are sensitive to hair movement.
May 2009 in “International Journal of Cosmetic Science” Permanent waving damages hair protein and weakens hair, especially with repeated treatments using sodium thioglycolate.
30 citations
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November 2012 in “Proceedings of the Royal Society B Biological Sciences” Hard α-keratins stay stiff in water because the surrounding matrix keeps them dehydrated and strong.
4 citations
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March 2015 in “Skin Research and Technology” Trichotillometry is a reliable method to measure hair strength and assess hair loss treatments.
April 2020 in “International Journal of Cosmetic Science” The study found that minor protein differences between curved and straight Japanese hair are unlikely to significantly affect hair structure.
March 2026 in “ACS Applied Bio Materials” The TO-TF copolymer strengthens damaged hair effectively and sustainably.
13 citations
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January 2001 in “Pediatric dermatology” A dark-haired Chinese girl had hair that looked banded under certain light but was normal under a microscope.
3 citations
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April 2011 in “Microscopy research and technique” Teratoma hair is similar to scalp hair but has a rougher surface and lower adhesive force.
November 2024 in “Biophysical Chemistry” Hair structure changes immediately during perm treatment, with initial damage partially restored later.
February 2020 in “Oxford University Press eBooks” The alpha-helix was confirmed as a key structure in proteins.
12 citations
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September 2013 in “BMC Biophysics” Keratin filaments' elasticity is influenced by their terminal domains and surrounding medium.
66 citations
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June 2004 in “Biophysical Journal” Hard α-keratin in hair has a unique, nonordered structure, different from other fibers.
94 citations
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September 2008 in “Journal of the American Academy of Dermatology” Traction alopecia is more common in African women than girls, especially when traction is applied to chemically relaxed hair; avoiding such hairstyles may reduce the risk.
49 citations
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September 2004 in “Journal of the European Academy of Dermatology and Venereology” Careful light microscopy is crucial for detecting mild cases of pili annulati, which weakens hair and varies widely in expression.
July 2023 in “Research Square (Research Square)” Skin's uneven surface and hair follicles affect its stress and strain but don't change its overall strength, and help prevent the skin from peeling apart.
3 citations
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January 2018 in “International Journal of Cosmetic Science” Hair stiffness increased by 13.2% after caffeine treatment, validating the Stiffness-Angle Law as an effective measurement method.
14 citations
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May 1979 in “International Journal of Dermatology” Trichostasis spinulosa mainly affects the nose, with many tiny hairs in one follicle, possibly influenced by hormones and sunlight.
10 citations
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January 2011 in “Journal of biomedical optics” OCT is a reliable, noninvasive way to measure hair thickness.
February 2025 in “International Journal of Cosmetic Science” A new amino acid derivative, ATS, improves hair texture and moisture, making it easier to straighten curly hair.
December 2025 in “Brazilian Journal of Hair Health” The Spiral Model helps understand hair growth changes with age and identify hair problems early.
March 2026 in “Preprints.org” Chirality affects the structure, strength, and function of peptide-based hydrogels.
31 citations
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February 2007 in “Journal of Structural Biology” Oxidation changes the structure of hair protein filaments, causing them to compact and rearrange.
August 2024 in “Biophysics Reviews” Mammal hairs have different internal structures.
1 citations
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January 1997 in “Skin Pharmacology and Physiology” Premature infants have less elastic hair than full-term infants.
1 citations
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January 2017 in “Science” A new method was developed to create complex molecular knots using iron ions.
January 2000 in “Zhongguo yixue wulixue zazhi” Different human hair keratin types have unique structures that affect how they dissolve and can be used to create self-tendons.
1 citations
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January 1987 in “Journal of Society of Cosmetic Chemists of Japan” The method accurately measures hair damage and strength, revealing effects of cosmetics and metal correlations.