January 2024 in “Authorea (Authorea)” This study found that laccase-assisted grafting of poly(tyrosine) onto wool materials improved shrinkage resistance and mechanical properties while causing minor decreases in crystallinity and thermal resistance, suggesting a potential "green" approach to enhance wool durability.
20 citations
,
February 1994 in “In vitro cellular & developmental biology. Animal” Wool follicles can grow in a lab with the right nutrients and conditions.
9 citations
,
October 1994 in “Brain Research” In this study, researchers observed that dorsal horn cells in fetal sheep begin responding to natural cutaneous stimulation by mid-gestation, coinciding with the initial innervation of the skin.
October 2023 in “Journal of Molecular Liquids” This study demonstrated that imidazole-based ionic liquids, particularly [Emim]DEP, effectively dissolved yak hair keratin, maintaining its structure better than other tested solvents, and also performed well on human hair and goat wool, with consistent performance even after five recycling cycles.
January 2013 in “Transactions of the Materials Research Society of Japan” In this study, carboxymethylalanyl disulfide keratin was shown to effectively prevent hair damage during repeated bleaching and permanent waving treatments.
69 citations
,
January 2009 in “Advances in Materials Science and Engineering” This study demonstrated that keratin can be effectively extracted from wool using alkaline solutions and that the extracted keratin maintains reactivity similar to that from other low-value sources like cattle hair.
65 citations
,
May 2006 in “Journal of Structural Biology” This study concluded that the curliness of human hair, regardless of ethnicity, originates from the inhomogeneous internal nanostructure due to differences in the distribution of two types of cortices.
23 citations
,
March 2019 in “Gene” In this study, researchers found that the evolutionary and structural features of the oFGF5 gene in sheep may influence hair follicle development and hair growth regulation.
July 2026 in “Scientific Reports” This study found that wool felting in Ukrainian Carpathian Mountain sheep is linked to significant changes in fatty acid composition, particularly highlighting a decrease in 18-methyleicosanoic acid in bound lipids, suggesting it as a potential marker for cuticle lipid layer damage during felting.
6 citations
,
January 2020 in “Czech Journal of Animal Science” This study found that specific SNPs in the sheep FAT1 gene are significantly associated with wool quality traits, suggesting potential markers for improving wool crimp, fibre length, and fibre diameter in breeding.
65 citations
,
February 1992 in “Development” This study characterizes a type II keratin intermediate filament gene family involved in early sheep follicle differentiation, detailing gene expression patterns and sequences in hair cortical cells.
In this study, researchers identified specific gene polymorphisms in Subo Merino sheep that significantly affect wool traits, suggesting these genetic markers could aid in breeding high-quality fine-wool sheep.
July 2009 in “International Journal of Cosmetic Science” This study found that 53% of Japanese women have straight hair while 47% have varying degrees of curved hair, with distinct structural differences observed in the internal makeup of curved hair fibers.
24 citations
,
June 2003 in “Journal of Structural Biology” This study suggests that varying intersheet interactions may explain the differences between the two polymorphic forms of macrofibril assembly in Merino wool and hair.
2 citations
,
July 2012 in “PubMed” In this study, the use of internal wool lipid liposomes was shown to improve the lipid composition and increase the resistance to breaking in both untreated and chemically treated hair fibers.
93 citations
,
May 1990 in “The EMBO Journal” Mice with extra sheep genes had hair that fell out and regrew in cycles.
7 citations
,
August 2009 in “Applied Mathematics and Mechanics-English Edition” This study demonstrates that (9+2) topological patterns derived from fractal fiber sets exist, with nine total patterns and only two being independent or fundamental.
20 citations
,
January 1995 in “Cells tissues organs” The researchers reported that exposure to long days after short-day treatment induced a synchronized, out-of-season wool growth cycle in New Zealand Wiltshire sheep, similar to cycles induced in other species.
9 citations
,
February 2005 in “The journal of investigative dermatology/Journal of investigative dermatology” This review discusses the complexity and genetic organization of human keratin gene clusters and addresses the ongoing need for an updated unified naming system; it reports no new clinical results.
January 2009 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” This study found that the structural and chemical composition of human curly hair may resemble that of sheep wool, implying a shared characteristic among mammals with wavy hair.
29 citations
,
October 2017 in “Journal of proteomics” This study found that specific proteins associated with fiber structure, hair growth, and fatty acid synthesis, including the DSC2 gene, may influence wool and hair characteristics in sheep and goats.
16 citations
,
January 2018 in “Advances in experimental medicine and biology” This review discusses the diversity of keratins and keratin-associated proteins in wool and hair, noting significant variation in their families, with no new results reported; the authors detail known protein structures without experimental findings.
55 citations
,
February 2014 in “Journal of Structural Biology” This study observed that human hair macrofibrils predominantly exhibit a double-twist architecture with varying inter-macrofibril angles, advancing insights into their structural organization and mechanical implications.
October 2014 in “Springer eBooks” Rabbit hair fibers are similar to wool and have a hollow center like feathers.
71 citations
,
September 2013 in “Materials Science and Engineering C” Keratin-based hydrogels from human hair and wool are promising for wound dressings and are more eco-friendly.
4 citations
,
February 2025 in “BMC Genomics” This study identified 71 SNPs linked to black wool traits in Qira sheep and found that specific mutations in the TYRP1 gene significantly correlate with coat color variations, providing insights for their genetic selection and conservation.
10 citations
,
November 2021 in “International journal of molecular sciences” This review discusses the role of keratin-associated proteins in the growth and characteristics of wool and hair fibres from sheep and goats, and highlights areas for future research, but it presents no new findings.
11 citations
,
April 2022 in “Biophysical Journal” In this study, certain cysteine residues in Romney sheep wool fibers were labeled more often during stretching tests, particularly under wet conditions, suggesting variability in their disulfide bond contributions to fiber mechanics depending on hydration.
This study observed that treating human hair with NaOH led to partially removed cuticles, resulting in better fiber cohesion and mechanical properties similar to wool, unlike bleach or formic acid treatments, which weakened the fibers.
4 citations
,
July 2010 in “International Journal of Cosmetic Science” This study observed that hair fibers in older women become more curved with age, decreasing hair luster due to their disordered alignment and structural differences between the convex and concave sides.