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Tensile properties of twisted hair fibers
International Journal of Cosmetic Science, 2005Hair is routinely twisted during grooming processes, which can cause tangles and lead to breakage of hair fibers. To evaluate the damage caused by twisting hair, the tensile stress–strain properties of single twisted hair fibers were measured by two different experimental procedures: (A) twist at constant length, followed by extension to break (without
Theresa A, Dankovich +2 more
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International Journal of Cosmetic Science, 2010
J. Cosmet. Sci., 60, 261–271 (March/April 2009)SynopsisIt is well established that silicones alter hair surface properties and that silicones have a significant impact on the macroscopic behavior of hair assembly, such as visual appearance, combing performance and manageability of the hair.
Anne, Dussaud, Lara, Fieschi-Corso
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J. Cosmet. Sci., 60, 261–271 (March/April 2009)SynopsisIt is well established that silicones alter hair surface properties and that silicones have a significant impact on the macroscopic behavior of hair assembly, such as visual appearance, combing performance and manageability of the hair.
Anne, Dussaud, Lara, Fieschi-Corso
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2014
Although most animals contain hairs on their skin, limited studies have been conducted on understanding the structure and properties of animal hairs except for wool from different types of sheep. Zhang et al. had studied the structural characteristics of rabbit hair and found that the hair fibers had average diameters which varied between 10 and 20 μm ...
Narendra Reddy, Yiqi Yang
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Although most animals contain hairs on their skin, limited studies have been conducted on understanding the structure and properties of animal hairs except for wool from different types of sheep. Zhang et al. had studied the structural characteristics of rabbit hair and found that the hair fibers had average diameters which varied between 10 and 20 μm ...
Narendra Reddy, Yiqi Yang
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Interactions between Crossed Hair Fibers at the Nanoscale
Langmuir, 2010The atomic force microscope fiber probe is used to directly measure the forces and friction between two human hairs under various conditions. It is shown that the forces between the hair fibers in solution can be well explained by a DLVO interaction and that cationic surfactant modifies the interactions in a manner entirely consistent with current ...
Gustavo S. Luengo, Mark W Rutland
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Viscoelastic properties of α-keratin fibers in hair
Acta Biomaterialia, 2017Considerable viscoelasticity and strain-rate sensitivity are a characteristic of α-keratin fibers, which can be considered a biopolymer. The understanding of viscoelasticity is an important part of the knowledge of the overall mechanical properties of these biological materials.
Yu Y, Yang W, André Meyers M
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Investigating the relationship between the hair fiber proteome and hair quality
International Journal of Cosmetic Science, 2004Many hair characteristics (e.g. color and curl) are genetically determined. Here, we investigated whether hair quality is also genetically controlled and related to differences in hair composition. Female, Caucasian subjects (n = 292) were recruited into this study and segmented by self‐perceived hair quality and by permanent colorant usage.
D.M. Heywood +5 more
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Failure of intercellular adhesion in hair fibers with regard to hair condition and strain conditions
International Journal of Cosmetic Science, 2004Although adhesion failure in hair fibers can occur inside cells, it occurs more frequently in the cell membrane complex (CMC), often involving the rupture of interlayer bonds. Therefore, a model of the CMC presented, based on prior research, in which we propose interconnecting bonds between the layers to assist interpretation of hair‐fracturing ...
Clarence, Robbins +3 more
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Analysis of DNA in hair fibers.
Journal of cosmetic science, 2003The extraction and identification of deoxyribonucleic acid (DNA) from human hair shafts is described, along with the effects of hair treatments on levels of DNA and suggestions of DNA location within the shaft. DNA was present at low levels in the hair shaft, and was identified using polymerase chain reaction amplification of the human leukocyte ...
Daniella M, Heywood +2 more
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A model of the hair cell-primary fiber complex
The Journal of the Acoustical Society of America, 1982The proposed model consists of a chain of three energy reservoirs through which energy from an infinite supply is fed to a modulator which in turn drives a firing mechanism. The modulator consists of a variable permeability p that depends on instantaneous basilar displacement a through: p = (a−A0)2 for a≳A0, and p = 0 for a?A0, where A0 is a constant ...
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HAIR BLEACHING AND ITS IMPACTS ON HAIR FIBER STRUCTURE
A descoloração capilar é um procedimento que se tornou amplamente popular e usado para fins estéticos. Entretanto, envolve a aplicação de produtos cosméticos que apresentam em suas formulações agentes oxidantes capazes de promover alterações estruturais na fibra capilar.Marcela Silva Alhadas Calil +4 more
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