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This article provides a diagnostic guide for clinicians to differentiate between various hair shaft disorders by using a structured question-by-question approach but does not report new clinical findings.

This study proposes a new method to selectively isolate keratin-associated proteins and keratin from human hair, suggesting that KAPs may support keratin fibers in hair structure.

Exosomes are crucial for protecting sensory hair cells in the inner ear.

This study found that permanent waving treatment induces structural changes in the cortex proteins of white human hair, significantly reducing its tensile strength without altering the S-S band intensity.

This study presents the first reported case of woolly hair nevus appearing during adolescence, with significant improvement observed 5 years later and structural changes in the hair documented.

This study observed that the thinning and structural abnormalities in monilethrix-affected hair occur at the internodes due to possible periodic dysfunction of the hair matrix, particularly in the cortex.

This study observed that prolonged water or soil exposure can lead to significant reductions in drug levels in bleached and natural hair samples.

Oxidation changes the structure of hair protein filaments, causing them to compact and rearrange.

In this study, researchers used cryo-electron microscopy to reveal how the natural compound osthole inhibits TRPV3 channels by binding to specific sites, changing the channel's conformation.

This study found statistically significant patterns in hair morphology and ultrastructure linked to biogeographic ancestry among European, African, and East Asian populations.

This review explores the structure and development of the hair cuticle, highlighting difficulties in studying some aspects and proposing new experimental approaches, but reports no new clinical results.

This study reported that the treatment of hair with glyoxylic acid straighteners causes major conformational changes within the hair fiber due to interactions between carbonyl and keratin components.

This study shows that environmental contamination affects mummy hair, suggesting that using it to assess ancient people's health or nutrition should be approached cautiously.

This study suggests that corkscrew hairs in tinea capitis result from internal hair damage by Trichophyton violaceum and external resistance from scalp scales.

This study used infrared spectroscopic imaging and scanning electron microscopy to reveal that alopecic hair has more irregular laminated structures and differing chemical profiles than normal hair, suggesting changes related to alopecia progression.

This review discusses in vitro methods for evaluating the effects of hair care products on hair fibers, reporting no new results; the authors emphasize the importance of selecting appropriate and accurate equipment for testing.

This research describes methods to analyze the mechanical properties and fracture characteristics of hair across different types and ages, using specialized tensile testing and imaging techniques, without reporting new results.

This study found that procyanidin oligomers bind to keratin and inhibit oxidative hair damage, suggesting their potential use in protective hair care products.

This study found that exposure to artificial sunlight led to variable changes in ethyl glucuronide levels in hair, with both increases and decreases observed depending on hair characteristics.

This study found significant structural and compositional differences in hair affected by alopecia areata compared to healthy hair, using a range of physico-chemical investigation methods.

This case report describes the first documented occurrence of pili torti in a healthy young adult cat, marked by noninflammatory and nonpruritic symmetrical multifocal alopecia.

In this study, individuals with a c.1072C > T mutation in the EDAR gene showed more hair shaft deformations compared to non-mutation carriers, highlighting EDAR's role in hair follicle development.

This study found that plasma jets can effectively clean and oxidize human hair fibers, with argon/oxygen plasma having the strongest effects, suggesting potential as an alternative to peroxide treatment.

This study described a new wig coating technique using keratin and graphene oxide that significantly enhanced UV resistance, antistatic properties, and durability compared to traditional methods.

This study observed that fetal hair follicle melanocytes varied in morphology and development stages, with melanosomes undergoing degradation into irregular pigment particles within keratinocytes.

This study found that digital perm treatments using sodium thioglycolate lotion led to the most significant reduction in protein content and greater hair damage compared to other methods and lotions.

This study found that mink pelts with "singe" and "red hip" defects often exhibit split hair tips and altered cuticle structures, which may contribute to their undesired metallic sheen.

In this study, an infection model using rabbits was developed for dermatophytosis by inoculating macroconidia of Microsporum species, showing that direct intradermal application effectively progressed to the skin invasion phase and highlighted the correlation between severity of symptoms and duration post-inoculation.

In this study, researchers observed that underhairs in domestic cats were the thinnest and shortest with regular scales, while guard hairs were the longest and thickest, having irregular scales.

This study tested five different brands of hair building fibers, examining their electrostatic and dielectric properties as well as analyzing their fiber structure with scanning electron microscopy.