research Distribution of Human Hair in Follicular Units
The research found that for a typical hair density, about 11 square centimeters of donor scalp is needed to get 800 hair grafts for transplantation.
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150-180 / 1000+ results research Mapping the hair density, thickness, and volume in normal and androgenetic alopecia subjects with the digital microscope
Hair density and thickness decrease in specific scalp areas in people with androgenetic alopecia.
research Assessing protein sequencing in human single hair shafts of decreasing lengths
Hair keratin proteins can be reliably identified in hair as short as 0.12 cm, with 0.5 to 2 cm being the best length for analysis.
research Human scalp hair: geometry, biochemistry, growth parameters and mechanical characteristics
A 6-group geometric classification of human scalp hair is more reliable and objective for testing than an 8-group system.
research Strain and Strain Recovery of Human Hair from the Nano- to the Macroscale
Human hair can almost fully recover its structure within about 1,000 minutes after being stretched.
research Why care about Linear Hair Growth Rates (LHGR)? A study using in vivo imaging and computer assisted image analysis after manual processing (CAIAMP) in unaffected male controls and men with male pattern hair loss (MPHL)
Thicker hair grows faster; hair loss patients have slower growth.
research Comparative Studies of the Diameters of Hairshafts in Anagen and in Telogen Phases in Male Adults Without Alopecia and in Male Adults With Androgenetic Alopecia
research A cDNA encoding the human type I hair keratin hHa1
hHb1, hHb3, and hHb6 mRNAs start expressing at the same time in hair follicles.
research The kinetics of moisture sorption by hair
Hair absorbs moisture differently based on its structure and treatment, with changes occurring at 30% humidity.
research HAIR DIAMETER IN FEMALE BALDNESS
Women with thinning hair have thinner hair strands than women without hair loss.
research Advanced Scalp Measurement Using a Phototrichogram With a Protractor and Tapeline
The document concludes that using a phototrichogram with a protractor and tapeline is a reliable and noninvasive way to measure hair loss.
research Observation of the Microstructure of Human Hair Based on a Single Detector Optical Coherence Tomography
Chemical dyes damage hair's internal structure more than perming, as shown by a special imaging technique.
research Multiscale modelling of human hair
Human hair becomes weaker and stretches more easily at higher temperatures.
research Hair surface interactions against different chemical functional groups as a function of environment and hair condition
Hydrophobic interactions affect virgin hair, while electrostatic interactions are key for bleached hair.
research Fractography of human hair
Moisture content significantly affects how human hair breaks.
research Quantitative trichoscopic analysis of hair density in people attending tertiary care hospital – A cross-sectional study
Hair density decreases with age, especially in the 60s.
research [A longitudinal elasticity study of hair from the human head in forensic medicine].
The method effectively measures hair elasticity and could be useful in forensics.
research Attenuated Total Reflection Fourier Transform Infrared Spectroscopy Analysis of Human Hair Fiber Structure
Human hair has different protein structures in its cuticle and cortex.
research Friction and wear studies of human hair and skin
Human hair and skin friction vary by ethnicity, hair type, and environmental conditions.
research The failure behavior of the anchorage of hairs during slow extraction
Growing hairs are easier to pull out than resting hairs due to different anchorage strengths.
research The optical properties of human hair II. The luster of hair fibers
research Hair resistance to mechanical wear
Hair's resistance to wear varies by ethnicity and treatment, with less wear indicating stronger hair.
research The measurement of haloperidol and reduced haloperidol in hair as an index of dosage history.
Hair analysis can track haloperidol dosage history.
research A simple assay for the study of human hair follicle damage induced by ionizing irradiation
Ionizing radiation damages human hair follicles by stopping cell growth, causing cell death, disrupting color, and increasing stress and damage markers.
research Hair—the most sophisticated biological composite material
Hair is a complex protein fiber with unique properties useful for developing hair products.
research Characterization and Chromosomal Localization of Human Hair-Specific Keratin Genes and Comparative Expression During the Hair Growth Cycle
Two specific hair keratin genes are active during hair growth and decline as hair transitions to rest.
research Integral characterization of normal and alopecic hair at different degeneration stages by in-situ visible and chemical imaging
Alopecic hair has more irregular structures and chemical changes than normal hair, reducing its strength.
research Hair keratin pattern in human hair follicles grown in vitro
Human hair follicles grown in vitro maintain normal keratin patterns and structure.
research Hair Shaft Damage from Heat and Drying Time of Hair Dryer
Using a hair dryer at 15 cm with continuous motion causes less damage than natural drying.
research Assessment of rate of hair growth using a simple trichometer
The trichometer accurately measures hair growth and is easy to use.