TLDR QIA-64 software can measure straight wire lengths accurately but needs improvement for curved wires and width measurements.
The study compared three image analysis methods to measure the length and width of wires representing mammalian hair. It found that the Qualitative Image Analysis 64 software (QIA-64) accurately measured the length of straight wires when features were manually selected, but struggled with curved wires. For width measurements, the Inscribed Radius procedure was more accurate than Mean Fibre Width. Although QIA-64 showed potential for research use, it required further refinement and validation before it could replace manual measurements with a microscope.
32 citations
,
March 2016 in “American Journal of Physical Anthropology” African hair is curled, Asian hair is thick, European hair is lighter, and chemical methods help identify hair color differences.
95 citations
,
January 2007 in “Human biology” Human hair can be classified into eight types based on physical features, not ethnicity.
15 citations
,
October 2020 in “European journal of pharmaceutics and biopharmaceutics” Caffeine penetrates skin quickly through open hair follicles, but less through closed ones, with levels becoming equal after 22 hours.
19 citations
,
September 2019 in “PLOS genetics” Telomere damage affects skin and hair follicle stem cells by messing up important growth signals.
Ovol2 is crucial for hair growth and skin healing by controlling cell movement and growth.
102 citations
,
August 2008 in “Genes & Development” Laminin-511 is crucial for early hair growth and maintaining important hair development signals.
3 citations
,
October 2022 in “PloS one” Scientists have developed a method to keep chicken feather follicles alive and structurally intact in a lab for up to a week.
