Current research on ethnic hair.

@article{Franbourg2003CurrentRO,
  title={Current research on ethnic hair.},
  author={A. Franbourg and P. Hall{\'e}got and F. Baltenneck and C. Toutain and F. Leroy},
  journal={Journal of the American Academy of Dermatology},
  year={2003},
  volume={48 6 Suppl},
  pages={
          S115-9
        }
}
This study collected qualitative and quantitative data about the morphology, structure, geometry, water swelling, and mechanical properties of hair fibers from subjects of different ethnic origins. X-ray analysis, cross-sectional measurements, tensile testing, and water swelling were performed on samples of hair collected from Caucasian, Asian, and African subjects. No differences in the intimate structures of fibers were observed among these 3 types of hairs, whereas geometry, mechanical… Expand

Figures, Tables, and Topics from this paper

Physical characterization of the hair of Mexican women
TLDR
Results show that Mexican hair appears to be intermediate of Asian and Caucasian hair in diameter and cross‐sectional ellipticity, which seems in line with the early and late ethnic origins of Mexican people. Expand
The influence of hair lipids in ethnic hair properties
TLDR
Evaluation of water sorption and desorption of the different ethnic hairs and with and without lipids is also studied mainly to determine permeation changes of the keratin fibres. Expand
Investigating the origins of nanostructural variations in differential ethnic hair types using X‐ray scattering techniques
TLDR
The purpose of the work presented here is to identify the main nanoscopic and molecular hierarchical differences across five different ethnic hair types from hair fibres taken exclusively from the scalp. Expand
The behavior of hair from different countries.
TLDR
The properties of curly hair from different countries were assessed using geometrical measurements from a laser scanning micrometer and a new hair shape classification method and it was concluded that hair characteristics are influenced by the degree of curl. Expand
Chemical and Physical Properties of Hair: Comparisons Between Asian, Black, and Caucasian Hair
Although the fundamental structure and function of the hair are similar among all races, there are important anatomic and molecular differences that contribute to the unique characteristics of ethnicExpand
The influence of African‐American hair's curl pattern on its mechanical properties
TLDR
The physical differences found in a comparison of several samples of African-American hair with different degrees of curl are described. Expand
Thermoanalytical characterization study of hair from different ethnicities
A characterization study of the samples of hair and animal keratin was performed to enhance the understanding of the thermal properties of the hair of the main ethnic groups. The mechanical,Expand
Structure and mechanical behavior of human hair.
TLDR
This model elucidates the tensile response of the α-keratin fibers and identifies the possible transformation to β-sheet structure of keratin under tension, which affects the ductility of hair. Expand
Morphology and properties of Asian and Caucasian hair.
TLDR
It was proven that the cuticles of Asian hair are more easily peeled off than Caucasian hair cuticles during daily grooming, which can be attributed to the difference in how stress is absorbed. Expand
Raman spectroscopy and electronic microscopy structural studies of Caucasian and Afro human hair
TLDR
It was observed that the action of several treatments on the same hair fibres resulted in even more pronounced structural changes, and scanning electron microscopy showed that each treatment caused a different morphological deformation pattern on the capillary surface of the human hair. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 24 REFERENCES
Caucasian Hair, Negro Hair, and Wool: Similarities and Differences
Synopsis--Caucasian hair, Negro hair, and Lincoln wool are compared in ternis of physical structure, mechanical properties, chemical composition, and rate of reaction with various reagents. SeveralExpand
The Physical Properties and Cosmetic Behavior of Hair
One of the roadblocks to both communication between the cosmetic scientist and consumers and scientific investigations in hair care has been the lack of meaningful definitions for the importantExpand
Human hair form. Morphology revealed by light and scanning electron microscopy and computer aided three-dimensional reconstruction.
TLDR
Using three-dimensional computer-aided reconstruction it was demonstrated that the follicle form determines the hair form, eg, the Negroid follicle has a helical form, whereas that of the Oriental follicle is completely straight. Expand
Plastic yielding and fracture of human hair cuticles by cyclical torsion stresses
Plastic yielding in the fotm of crazing and shear bands was found to occur in human hair cuticles subjected to cyclical torsion stresses. This type of damage appeared in the form of helicoidalExpand
Amounts of Fibrous Proteins and Matrix Substances in Hairs of Different Races
TLDR
It has been suggested that the ratios of FP to MS contents in the hair may be involved in the determination of the macroscopic racial variations in the form of hair. Expand
Mechanical and fractographic behavior of Negroid hair
Synopsis The fracture behavior of Negroid hair was studied to clarify the causes of fiber breakage at low levels of extension. Visual observation and ellipticity measurements reveal frequent twists,Expand
Understanding African-American hair.
TLDR
African-American hair is unique due to its geometry--a kinky hair shaft with variations in diameter, which creates the need for specialized grooming products and procedures to ensure that the hair maintains its cosmetic value. Expand
Organization of microfibrils in keratin fibers studied by X-ray scattering modelling using the paracrystal concept.
TLDR
The new approach is based on a paracrystal distribution function and can be used for modelling equatorial X-ray scattering profiles of all types of hexagonal fibrillar assemblies, which are in fact widely found in biological tissues. Expand
Electrophoretic analysis of alkylated proteins of human hair from various ethnic groups
TLDR
This study shows that the hair sulfur-containing proteins are identical whatever their racial origin, and the variability of intensity of the bands of LSP was found to correlate with the amount of extracted proteins. Expand
Hair Low‐sulfur Protein Composition does not Differ Electrophoretically among Different Races
TLDR
The low‐sulfur protein composition of the hair did not differ electrophoretically among the three races, suggesting that the low‐Sulfur proteins may not be responsible for the macroscopic racial variations in the form of hair. Expand
...
1
2
3
...