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Curly and straight hair differ in how their internal fibers are arranged.

Hair and wool have complex microscopic structures with microfibrils and varying cystine content.

Stretching wool changes its structure and improves fiber alignment.

Hard α-keratin in hair has a unique, nonordered structure, different from other fibers.

Stretched hair has a similar structure to natural silk, showing hair's elasticity involves reversible changes within its molecules.

The DWLSM provides detailed imaging of hair shafts and follicles with high accuracy.

Light scatters differently from elliptical hair fibers than from circular ones, and a new model better predicts this behavior, especially for shiny highlights.

Curly wool has more orthocortex than straight wool.

Different ethnic hair types have unique nanoscopic and molecular features despite having the same basic keratin structure.

The new X-ray technique allows for precise and non-destructive measurement of elements in hair, creating the first database of its kind for a specific ethnic group.

A new laser-based microscope can clearly image biological structures without labels.

The protein structures in the hair and tendon were preserved, but their molecular arrangements changed.

Light diffraction helps in eye surgery, brain treatments, and detecting hair loss and genetic diseases.

The research found a way to measure hair surface changes by analyzing how light reflects off of it, and determined hair cuticle angles vary by hair length and color.

Fibre optic confocal imaging can visualize skin layers, blood vessels, and nerves in live mice.

A new method using solid-state circular dichroism anisotropy can distinguish similar chiral compounds better than traditional techniques.

Human hair has different protein structures in its cuticle and cortex.

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

The technique showed that human hair has two main parts, with 68% being rigid and the rest flexible, and water swelling affects its structure.

The new method reliably identifies and measures different animal hair fibers in textiles.

Different hair types from various ethnic groups affect hair shine due to characteristics like thickness and shape.

Sheet formation is key to macrofibril structure differences in wool.