research Photodegradation of Human Hair: A Microscopy Study
UV radiation significantly damages hair, especially with humidity, making it more vulnerable to further damage.
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60-90 / 1000+ resultsresearch Analysis of Heterogeneous Reaction Between Reducing Agents and Keratin Fibers Using Raman Spectroscopy and Microspectrophotometry
The study found that thioglycolic acid breaks down hair bonds more consistently than l-cysteine, which is less damaging to hair.
research Perspectives on Hair Evolution Based on Comparative Studies on Vertebrate Cornification
Hair in mammals likely evolved from glandular structures, not scales.
research Volume Changes During Water Binding to Hair Fibers
Hair increases in size when it absorbs water, and treatments like bleaching affect how much water it can take in.
research In-Situ Tensile Testing of Hair Fibers in an Environmental Scanning Electron Microscope
Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.
research Charge Density Alterations in Human Hair Fibers: An Investigation Using Electrostatic Force Microscopy
The study found that a polymer treatment changes the charge on hair surfaces, making bleached hair smoother and less porous.
research Wetting Behavior of Human Hair Fibers
Human hair's ability to get wet is complex and can change with treatments, damage, and environment.
research A Highly Resistant Structure Between the Cuticle and the Cortex of Human Hair. II. CARB, a Penetration Barrier
CARB is a strong barrier in human hair that prevents dye penetration.
research A Study of the Differentiation Products of the Hair Follicle Cells with the Electron Microscope
Hair follicle cells become four types: medulla, cortex, cuticle, and inner root sheath.
research Structural Investigation on Damaged Hair Keratin Treated with α,β-Unsaturated Michael Acceptors Used as Repairing Agents
Treatments improved hair surface and scale structure but didn't increase certain bonds in the hair cortex.
research The Cell Membrane Complex: Three Related but Different Cellular Cohesion Components of Mammalian Hair Fibers
The cell membrane complex in mammalian hair has three distinct types with different structures and chemical properties.
research Protection and Restoration of Damaged Hair via a Polyphenol Complex by Promoting Mechanical Strength, Antistatic, and Ultraviolet Protection Properties
A new hair treatment using a natural polyphenol complex improves hair strength, reduces static, and protects against UV damage.
research Qualitative Investigation of Fresh Human Scalp Hair with Full-Field Optical Coherence Tomography
Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.
research Torsional Method for Evaluating Hair Damage and Performance of Hair Care Ingredients
The torsional method effectively evaluates hair damage and the performance of hair care ingredients.
research Direct Observation of Hair Components Involved in Formation of Permanent Waves
Microfibrils are key for permanent waves, and hydrolyzed keratin improves wave formation and hair condition.
research Structure of Intermediate Filament Assembly in Hair Deduced from Hydration Studies Using Small-Angle Neutron Scattering
Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.
research Physical Properties of Human Hair: Evaluation of Bending Stress by Measuring the Major and Minor Axis of Human Hair
The cuticle significantly contributes to hair stiffness, making up about 60% of the total bending stress.
research A Highly Resistant Structure Between Cuticle and Cortex of Human Hair
A tough membrane between the outer and inner layers of human hair protects it from damage.
research Characterization of Human Ovarian Teratoma Hair Using AFM, FT-IR, and Raman Spectroscopy
Teratoma hair is similar to scalp hair but has a rougher surface and lower adhesive force.
research Nanomechanical Characterization of Human Hair Using Nanoindentation and SEM
Human hair's strength and flexibility vary by ethnicity, damage, and treatment.
research Investigation of Hair Dye Deposition, Hair Color Loss, and Hair Damage During Multiple Oxidative Dyeing and Shampooing Cycles
Repeated dyeing and shampooing cause hair color loss and damage.
research Investigation of Hair Shaft in Seborrheic Dermatitis Using Atomic Force Microscopy
Hair from people with seborrheic dermatitis is thicker scaled, more damaged, and thinner than healthy hair, and atomic force microscopy can help monitor the condition.
research Local Structure of Human Hair Spatially Resolved by Sub-Micron X-Ray Beam
Human hair has a new region with ordered filaments and the cuticle contains β-keratin sheets.
research Cosmetic Trichology: Hair Cosmetics, Styling, and Their Effect on the Hair Fiber
Hair styling products can damage hair over time.
research Structural Changes of Hair Shaft After Application of Chemical Hair Straighteners: Clinical and Histopathological Study
Chemical hair straightening improves smoothness and shine but may cause side effects, suggesting a need for safer methods.
research Morphology and Ultrastructure of Antler Velvet Hair and Body Hair from Red Deer (Cervus elaphus)
Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.
research Distribution of Glycolipid and Unsaturated Fatty Acids in Human Hair
Human hair has more unsaturated fats inside than on the surface, and certain lipids may help bind the outer and inner layers together.
research Multimodal Evidence of Mesostructured Calcium Fatty Acid Deposits in Human Hair and Their Role on Hair Properties
Calcium fatty acid deposits found in human hair can change its appearance and feel.
research Elucidating Penetration Pathways Into the Hair Fiber Using Novel Microscopic Techniques
The conclusion is that substances can penetrate hair fibers through multiple pathways, including both the cell membrane complex and the non-keratinous parts.
research Heat-Damaged Evaluation of Virgin Hair
Heat damages hair, with Asian hair losing more protein than Caucasian hair.