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Different oils penetrate hair differently; monounsaturated oils like olive oil penetrate better than polyunsaturated oils.

Hair increases in size when it absorbs water, and treatments like bleaching affect how much water it can take in.

The document describes a method for preparing hair for microscopy by embedding it in plastic, cutting it, and storing it cold before imaging.

The study found that certain conditioning compounds can penetrate hair and potentially improve its resistance to damage.

Conditioners with PQ-10 soften the flat part of hair cuticles but harden the edges.

The new test shows how hair treatments affect hair's bending stiffness by swinging a pendulum through hair fibers.

Microfluorometry effectively measures how much polymer coats and penetrates hair, useful for evaluating hair products.

All five hair fiber products improved appearance but didn't stick to completely bald areas.

Changing disulfide bonds in human hair affects its melting behavior and thermal stability.

Atomic Force Microscopy is a more accurate way to assess hair damage and the effect of cosmetic treatments.

Different oils affect hair flexibility and strength, with their impact varying on whether hair is virgin or bleached.

Hyaluronic acid in shampoo penetrated hair well, reduced frizz, and improved hair strength and moisture.

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

Hair thickening procedures can help people with early hair loss when combined with proper scalp and hair care.

Trichoscopy can help tell the difference between artificial hair fibers and other scalp artifacts.

The new method can tell how hair fibers react to moisture after treatments.

Disulfide bonds affect the melting behavior of hair's crystalline structure, but hair retains some stability even after these bonds are broken.

Acidic sandy clay damages archaeological hair the most, while dry conditions preserve but make it brittle; silicone oil can help keep the hair flexible.

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

Hair coloring and bleaching can permanently break down hair protein and temporarily change its properties.

A new method helps understand hair shine and various products improve hair care.

Dye enters hair at the edges of cuticle cells and penetrates more from water than alcohol-based solutions.

Researchers developed a new method to identify animal hair in textiles, which is effective for various fibers and more reliable than previous methods.

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

Adding human hair to sand improves its strength when dry and maintains strength when wet.

Adding human hair to clayey soil makes it stronger, even after freeze-thaw cycles, and is eco-friendly and cheap.

Merino wool fibers change shape with moisture, while human hair shape stays the same.

Repeated hair dyeing significantly damages hair.

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

Stretching-setting treatment works for wool and human hair using specific equipment and methods.