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The research found that twisting hair fibers can show changes in stiffness and damage, and help tell apart different hair treatments.

Hair fibers degrade and change color in very basic water.

Sunlight and chemical treatments change hair's internal structure differently, needing specific care.

Neonate scalp hair is thinner, lacks a medulla, and has smaller follicles compared to adult hair.

Hair straightening changes hair structure and can cause damage if done wrong, but improvements in the methods are expected to continue.

Glycoconjugate sugars are important for hair follicle development.

Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.

The 16th-century mummy's hair was well-preserved due to a calcium coating.

THH and PAD type III appear together early in hair growth, but deiminated THH appears later, suggesting another factor is involved.

Two mouse mutants have defective hair cuticle cross-linking.

Hair germ cells differ from epidermal cells in keratin expression, and specific keratins form after hair differentiation.

The research provided a detailed view of the non-keratinous parts of human hair fibers.

Ziehl-Neelsen's stain helps identify different parts of hair in sheep and goats.

Pubic hair has a thicker, more protective outer layer than scalp hair, possibly due to evolution.

Polymers help reduce damage and improve bleached hair when used during or after bleaching.

Surgical stress temporarily changes hair fiber dimensions, returning to normal after four weeks.

UV-A radiation significantly damages semi-permanent dyed hair.

Beard hair medulla cells have a unique and varied keratin pattern.

Human hair keratins were cataloged, showing their roles in hair differentiation stages.

A new method quickly extracts and identifies proteins from hair and other keratin sources.

Different keratin proteins are expressed in various epithelial cells at different stages, affecting cell structure and function.

Girls have higher DHEA levels earlier in puberty than boys, indicating earlier development.

Mice with extra sheep genes had hair that fell out and regrew in cycles.

Hair dyes vary in how long they last and how deeply they penetrate hair.

K39 and K40 are the last keratins expressed in hair development, completing the hair keratin catalog.

A new method effectively separates keratin-associated proteins and keratin from human hair.

Calcifying epithelioma cells can differentiate into hair cortex and outer root sheath.

Hair growth is controlled by specific gene clusters and proteins, and cysteine affects hair gene expression in sheep.

Hair analysis for drugs needs a better understanding of how drugs enter hair, considering factors like hair structure and pigmentation.

Insulinomas and adrenocortical tumors are common in older ferrets, diagnosed with blood tests and ultrasounds, and treated with medications or surgery.