Abstracts: 18‐MEA and hair appearance

Tanamachi, Hiroto; Tokunaga, Shinichi; Oguri, Masashi; Inoué, Shinya

doi:10.1111/j.1468-2494.2010.00609_6.x

Cited by 14 publications

(28 citation statements)

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“…A major component of exogenous lipids is 18-MEA, covalently attached to the cuticle surface. This lipid works as a lubricant decreasing friction between hair fibers and its absence influences the sensory perception of hair such as dry hair or difficulty in combing [55]. Lipid content may vary depending on several factors, such as ethnicity, gender and age [50,56,57].…”

Section: Hair Lipidsmentioning

confidence: 99%

Human Hair and the Impact of Cosmetic Procedures: A Review on Cleansing and Shape-Modulating Cosmetics

et al. 2016

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Abstract:Hair can be strategically divided into two distinct parts: the hair follicle, deeply buried in the skin, and the visible hair fiber. The study of the hair follicle is mainly addressed by biological sciences while the hair fiber is mainly studied from a physicochemical perspective by cosmetic sciences. This paper reviews the key topics in hair follicle biology and hair fiber biochemistry, in particular the ones associated with the genetically determined cosmetic attributes: hair texture and shape. The traditional and widespread hair care procedures that transiently or permanently affect these hair fiber features are then described in detail. When hair is often exposed to some particularly aggressive cosmetic treatments, hair fibers become damaged. The future of hair cosmetics, which are continuously evolving based on ongoing research, will be the development of more efficient and safer procedures according to consumers' needs and concerns.

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Section: Hair Lipidsmentioning

confidence: 99%

Human Hair and the Impact of Cosmetic Procedures: A Review on Cleansing and Shape-Modulating Cosmetics

et al. 2016

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“…During the chemical process, i.e., bleaching, the chemistry of the top lipid layer and, when exposed, underlying proteins are altered [19] resulting in the changes in surface energy and hydrophobicity [24,25], luster [28], and mechanical properties [21]. The surface of a bleached hair fiber has lower cysteine and higher cysteic acid (-SO 3 -) contents due to the removal of the 18-MEA layer and oxidation of cysteine groups [19].…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Pressure Plasma Jet Treatment of Human Hair Fibers

et al. 2015

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Human hair fibers in virgin and dyed forms were treated with atmospheric pressure helium, helium/ oxygen, argon, and argon/oxygen plasma jets at 20 W of power. The effects of 10-min plasma treatment on surface morphology and chemistry were studied by scanning electron microscopy and X-ray photoelectron spectroscopy, respectively. The plasma treatment was quite effective for removing the organic residues from the surface and creating oxidized functional groups. Helium plasma had a mild cleaning effect on the surfaces while argon/oxygen plasma had the strongest corrosive effect. Mild hydrogen peroxide treatment for the same duration had neither the cleaning nor the oxidizing power of the plasma jets. These types of plasma jets have the potential to replace peroxide treatment. The corrosive jets can be used to restore dyed hair fibers. In addition, the jets can be used to clean the surfaces of hair fibers to prepare samples for analytical investigations where the organic residues may induce problems.

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“…The absence of 18‐MEA is considered as one of the reasons for an increase in friction on the surface of the cuticle [37]. Recently, the effects of the removal of 18‐MEA on the dynamic contact angle (advancing contact angle and receding contact angle) and friction force (friction force microscopy) were examined [5]. The decrease in 18‐MEA on the cuticle surface affects the hydrophobic–hydrophilic properties of hair by providing lower advancing and receding contact angles.…”

Section: Resultsmentioning

confidence: 99%

“…The alkali was then removed by rinsing the hair with t ‐butanol (2 x ), ethanol and, finally, by washing in water. Characteristic features of the 18‐MEA removed hair are described elsewhere [5].…”

Section: Methodsmentioning

confidence: 99%

Temperature as a moisture cue in haptics on hair

Tanamachi

2011

Intern J of Cosmetic Sci

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A mechanism for giving a moisturized or dried-out feeling to hair was investigated. A two-step approach was conducted in order to elucidate the issue. First, we have reviewed previous studies that are related to the sensory perception of materials not only in cosmetic industry but also in other fields, such as textile and architecture industries, and established a hypothesis. Second, we have verified the hypothesis derived from the first step and identified the mechanism for the moisturized or dried-out feeling that people feel by measuring the heat transfer characteristic, q(max) . The results revealed that the moisturized or dried-out feeling that people feel at the moment of contact with hair was highly related to the temperature drop at the skin surface. The results also revealed that the moisturized or dried-out feeling strongly depends on the hair shape (meandering and diameter), surface damage and the water content of hair fibres which constitute the hair swatch. The moisturized feeling, however, was not related to the water content of hair fibres at a constant relative humidity (RH), as the differences in the water content of the hair fibres at a constant RH were too small for the recognition of the difference in the moisturized feeling.

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Abstracts: 18‐MEA and hair appearance

Cited by 14 publications

References 0 publications

Human Hair and the Impact of Cosmetic Procedures: A Review on Cleansing and Shape-Modulating Cosmetics

Human Hair and the Impact of Cosmetic Procedures: A Review on Cleansing and Shape-Modulating Cosmetics

Atmospheric Pressure Plasma Jet Treatment of Human Hair Fibers

Temperature as a moisture cue in haptics on hair

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