The influence of hair bleach on the ultrastructure of human hair with special reference to hair damage.

@article{Imai2011TheIO,
  title={The influence of hair bleach on the ultrastructure of human hair with special reference to hair damage.},
  author={Takehito Imai},
  journal={Okajimas folia anatomica Japonica},
  year={2011},
  volume={88 1},
  pages={
          1-9
        }
}
  • Takehito Imai
  • Published 1 May 2011
  • Chemistry
  • Okajimas folia anatomica Japonica
Key MethodThe influence of human hair bleaching agents with different bleaching strength on the ultrastructure of human hair was studied using a transmission electron microscope (TEM) and an energy dispersive X-ray spectrometer equipped with TEM (EDS-TEM). Two kinds of bleaching agents were used: a lightener agent with a weak bleaching effect and a powder-bleach with a stronger bleaching effect. From the comparison of the bleaching properties obtained by the electronic staining of black and white hair…

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References

SHOWING 1-10 OF 23 REFERENCES
Analysis of structural changes in bleached keratin fibers (black and white human hair) using Raman spectroscopy
TLDR
It is concluded that the melanin granules including metal ions act as a decomposition accelerator for the oxidizing agent, thereby leading to a higher level of disulfide (–SS–) group cleavage in the black human hair compared with that of the white human hair.
Comparison of the effects of some reactive chemicals on the proteins of whole hair, cuticle and cortex
TLDR
The radioactive tagging experiments showed that virgin hair contains an appreciable number of free sulfhydryl groups and that the treatmen, except for bleaching, increase the number of such groups.
Histochemical observation of the cell membrane complex of hair.
The present work is to clarify the fine structure of hair fiber components, especially Cell Membrane Complex (CMC) of cuticle. Hair fibers were treated with either hydrophilic N-acetylcysteine (NAC),
Amino Acid Analysis of Cosmetically Altered Hair
Synopsis--Bleached and permanent waved hair, treated on the head by consumers, as well as unaltered hair, were hydrolyzed and examined by automatic amino acid analysis. The hydrolyzates of severely
The Mechanism of Hair Bleaching
Synopsis--The color of mammalian HAIRS is due mainly to the inclusion of discrete, darkly colored MELANIN granules in the keratinized cytoplasmic protein of the fiber-forming cells. During BLEACHING
Morphology and histochemistry of human hair.
TLDR
The broad outlines of the techniques used in the study of hair are reviewed, with particular attention being paid to the processes of chemical staining which enable one to define various aspects of the chemical composition of the hair's microscopic sub-components.
Morphology and histochemistry of human hair.
TLDR
The broad outlines of the techniques used in the study of hair are reviewed, with particular attention being paid to the processes of chemical staining which enable one to define various aspects of the chemical composition of the hair's microscopic sub-components.
Ultrastructure of human scalp hair shafts as revealed by freeze‐substitution fixation
TLDR
The ultrastructure of human scalp hair shafts prepared by a rapid‐freezing technique followed by freeze‐substitution fixation that allows the observation of fine cell structures is reported.
ELECTRON MICROSCOPE STUDIES OF HAIR AND WOOL
  • G. Rogers
  • Biology
    Annals of the New York Academy of Sciences
  • 1959
TLDR
With the emergence of this fairly-clear picture of keratinizing cells a t the fine structural level of organization, it has become of interest to investigate, with the electron microscope, the packing arrangements of the microfibrils and other structural details in these cells in the fully keratinized condition.
Deposition of 18-MEA onto alkaline-color-treated weathered hair to form a persistent hydrophobicity.
TLDR
It was found that the combination of 18-MEA with specific cationic surfactants makes the alkaline-color-treated weathered hair surface hydrophobic and that its hydrophobicity is maintained even after shampooing.
...
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