99 citations,
May 1998 in “Journal of biological chemistry/The Journal of biological chemistry” Small proline-rich proteins and trichohyalin help make epithelial tissues tougher and more flexible.
356 citations,
December 1986 in “The journal of cell biology/The Journal of cell biology” Hair and nail cells share similar proteins, indicating a common differentiation pathway.
4 citations,
April 2019 in “Cosmetics” Hair stiffness is higher when it has more para-like cortical cells.
25 citations,
May 1994 in “Journal of Investigative Dermatology” Researchers found a new gene, hacl-1, that is active in mouse hair follicles during hair growth and may be important for hair biology.
4 citations,
July 2022 in “Scientific reports” Crossbreeding improves goat fiber quality, and specific genes affect hair traits and color.
8 citations,
November 2022 in “International Journal of Cosmetic Science” Human hair varies widely and should be classified by curl type rather than race.
New methods to classify curly hair types were developed based on shape and strength.
March 2021 in “Research Square (Research Square)” The SbbHLH85 protein helps sweet sorghum grow more root hairs but makes the plant more sensitive to salt.
62 citations,
December 2007 in “Journal of biological chemistry/The Journal of biological chemistry” A specific chemical change in the S100A3 protein leads to the formation of a four-part structure important for hair formation.
7 citations,
January 1982 in “Australian Journal of Biological Sciences” The study investigated the in vitro growth and differentiation of epithelial cells from post-embryonic hair follicles of young rats. Cell aggregates formed within the first 2 days of culture, with higher cell densities accelerating this process. These aggregates primarily consisted of epithelial cells, though some mesenchymal (fibroblast) cells were also present. Citrulline was found in the cultured cell proteins, and electrophoretic analysis revealed hair cortical keratin. However, contrary to previous findings, these proteins were not synthesized during the culture period.
28 citations,
March 2014 in “Biological reviews/Biological reviews of the Cambridge Philosophical Society” The document concludes that hair curvature can be explained by the growth patterns caused by the shape and separation of cells in the hair follicle and is affected by specific molecular pathways.
40 citations,
November 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” S100A3 protein is crucial for hair shaft formation in mice.
4 citations,
July 2010 in “International Journal of Cosmetic Science” Curved human hair has different structures on its convex and concave sides.
25 citations,
March 2002 in “Scanning” Confocal microscopy is better than scanning electron microscopy for studying hair in its natural state and understanding hair products' effects.
16 citations,
October 1992 in “Journal of cutaneous pathology” Bubble hair deformity may be caused by hair shaft trauma and can improve with gentle hair care.
15 citations,
May 2010 in “International Journal of Cosmetic Science” The cell membrane complex in mammalian hair has three distinct types with different structures and chemical properties.
6 citations,
April 1996 in “Journal of histochemistry and cytochemistry/The journal of histochemistry and cytochemistry” TGF-alpha is present in sheep and ferret skin and may affect hair growth without directly stimulating cell proliferation.
3 citations,
December 2018 in “Routledge eBooks” Hair is made of strong keratin fibers that protect against the environment.
2 citations,
July 2019 in “Cosmetics” Beautiful hair is flexible and elastic due to its unique double-layered structure and can be enhanced with succinic acid treatment.
July 2016 in “Indian journal of science and technology” Neonate scalp hair is thinner, lacks a medulla, and has smaller follicles compared to adult hair.
January 2006 in “Seibutsu Butsuri” Curly and straight hair differ in how their internal fibers are arranged.
34 citations,
October 1982 in “Journal of applied polymer science” Moisture content significantly affects how human hair breaks.
1 citations,
July 2015 in “PubMed” Human hair's strength comes from a honeycomb-like structure and macrofibrils.
Yak hair stretches mainly due to macromolecules slipping past each other.
7 citations,
December 2011 in “Annals of anatomy” Involucrin helps strengthen the inner parts of human hair.
50 citations,
March 2001 in “Clinics in dermatology” Human hair is complex and grows in cycles starting from embryonic life.
8 citations,
January 2016 in “Journal of fiber science and technology” Bleaching hair increases cysteic acid levels in a predictable way.
13 citations,
September 2008 in “PubMed” Japanese women's curved hair has an uneven internal structure and varying amino acid composition.
July 2009 in “International Journal of Cosmetic Science” Japanese women's curved hair has an uneven internal structure and varied amino acid composition.
9 citations,
January 1981 in “Australian journal of biological sciences” Lambs fed a liquid diet showed abnormal wool and skin, which improved with more B-vitamins, suggesting a link to B-vitamin deficiency.