20 citations,
July 1988 in “Clinics in dermatology” Thioglycolate lotions are the most popular method for permanent waving and hair straightening.
April 2024 in “Journal of wildlife diseases” Muskox hair growth rates vary widely, so a single growth rate can't be used for all populations.
5 citations,
January 2018 in “International Journal of Trichology” Hair strength is similar across different scalp areas, and not affected by age, gender, or hair thickness.
69 citations,
January 2002 in “Journal of biomedical optics” Dyes can penetrate human skin and hair follicles up to 1.2 mm deep and the sebaceous gland can store dye; Indocyanine Green lotion was made for safe dyeing and monitoring.
19 citations,
September 2020 in “General and comparative endocrinology” Hair cortisol is a reliable stress indicator in cattle but may not be valid for pigs.
12 citations,
January 2015 in “Skin appendage disorders” Dermoscopy helps quickly identify hair breakage in people of African descent.
1 citations,
December 2022 in “Applied Sciences” 42 citations,
January 2017 in “Genes” The gene KAP22-1 affects wool yield and fiber shape in sheep.
27 citations,
March 2018 in “Journal of Experimental Biology” Wool fibre curvature is due to longer orthocortical cells compared to paracortical cells.
20 citations,
February 1994 in “In vitro cellular & developmental biology. Animal” Wool follicles can grow in a lab with the right nutrients and conditions.
18 citations,
January 1965 in “Stain Technology” 15 citations,
January 1999 in “Reproduction Fertility and Development” Merino sheep have fewer wool follicles at birth than before birth.
11 citations,
October 1997 in “British Journal of Dermatology” Wool follicles grew fibres for 8-10 days in a serum-free culture, influenced by calcium, glucose, amino acids, and insulin.
7 citations,
January 2001 in “Annales de zootechnie” Melatonin treatment increases wool production and improves fiber quality in angora rabbits.
7 citations,
February 1985 in “Textile Research Journal” Cellular debris sticks to damaged wool fibers and affects wool cleanliness.
6 citations,
June 1976 in “Journal of ultrastructure research” Keratinized wool cells still have some organelles like lysosomes and mitochondria.
4 citations,
March 2016 in “Small ruminant research” Vicuña wool's quality is due to a high density of fine secondary hair follicles, and their skin glands may be used for communication.
3 citations,
December 2021 in “Proteins” Wool fiber curliness is linked to the presence of certain proteins and K38.
3 citations,
April 2002 in “Animal Science” Spermidine injections increased wool growth rate in lambs without changing fibre thickness.
3 citations,
January 1982 in “Australian journal of biological sciences” Ethionine significantly inhibits wool growth in sheep but not hair growth in mice or rats.
1 citations,
January 2012 in “International journal of trichology” Sheep hair follicle cells can grow a lot but need the dermal papilla to do so.
1 citations,
November 1981 in “PubMed” No clear conclusion available.
July 2022 in “New Zealand journal of agricultural research” The KRTAP27-1 gene variations in sheep may affect wool length and weight.
February 2021 in “International journal of agriculture & biology/International journal of agriculture and biology” Wool traits in sheep are controlled by many genes and environmental factors.
To prevent wool loss in sheep, provide balanced nutrition and reduce stress.
Stretching-setting treatment works for wool and human hair using specific equipment and methods.
January 1999 in “Birkhäuser Basel eBooks” Metallothionein likely helps in cell growth and development in wool follicles of fetal sheep.
4 citations,
September 2016 in “World Rabbit Science” High wool density in Rex rabbits is linked to specific gene activity affecting hair follicle development.
January 2013 in “Transactions of the Materials Research Society of Japan” CMADK reduces hair damage from bleaching and permanent waving.
17 citations,
August 2015 in “Journal of Animal Science” The MTR gene affects wool quality and production in Chinese Merino sheep.