Internal Structure Changes in Bleached Black Human Hair Resulting from Chemical Treatments: A Raman Spectroscopic Investigation

August 2014 in “ Journal of molecular structure ”

Akio Kuzuhara

Raman spectroscopy bleached hair permanent waving l-cysteine disulfide bonds keratin cysteic acid oxidation reduction hydrolyzed eggwhite protein keratin associated protein CYS HEWP KAP

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L-cysteine →

Keratin →

Studysummary In this study, the authors concluded that a hydrolyzed eggwhite protein treatment promoted the reconnection of disulfide bonds in excessively bleached hair, after reduction and oxidation processes in permanent waving.

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4 / 4 results

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research Analysis of Structural Changes in Permanent Waved Human Hair Using Raman Spectroscopy

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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.

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This study suggests that increased amounts of less stable disulfide conformers in hair shafts may be linked to the brittleness observed in trichothiodystrophy.

research Analysis of Structural Change in Keratin Fibers Resulting from Chemical Treatments Using Raman Spectroscopy

52 citations , February 2005 in “Biopolymers”

In this study, chemical treatments during permanent hair straightening were found to randomize proteins in the cortex, aiding in the reconnection of disulfide bonds during oxidation.