Interpretation of the human skin biotribological behaviour after tape stripping

Pailler-Mattéi, C.; Guerret‐Piécourt, C.; Zahouani, H.; Nicoli, Sara

doi:10.1098/rsif.2010.0672

Cited by 25 publications

(32 citation statements)

References 32 publications

(41 reference statements)

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“…Meanwhile, the thickness of the SC was found to gradually diminish after a few rubbings, which is validated by the experimental data in Figure 10 (II). In general, it is believed that the mechanical properties of the stratum corneum cannot influence the global mechanical properties of the skin [15,16]. This could explain why the mechanical parameters of the skin are independent of the thickness of the SC in the "Cutometer" measurement except the distensability of the skin (see Table 1 and Figure 12).…”

Section: Skin Mechanical Propertiesmentioning

confidence: 92%

“…Therefore, in the current test, corresponding changes on the moisture level of the skin and the friction force with respect to the numbers of tape strippings can be directly observed. In the study of Pailler-Mattei, et al [16], the change of the adhesion force seems to be mainly attributable to the removal of the SC since there less or no film at the surface on the forearm. In the current work, though, it is impossible to separate changes in moisture and electric charge from the "MoistSense" so it cannot be stated categorically whether both or either on their own are responsible for adhesion changes.…”

Section: Electrostatic Forcesmentioning

confidence: 99%

“…In a later study, they used a "fieldmeter" device to measure and compare the electric charge on the surface of skin before and after tape stripping [16]. Unfortunately, they did not observe any significant change on the electric charge, as well as the physico-chemical properties.…”

Section: Electrostatic Forcesmentioning

confidence: 99%

“…The previous research has produced some interesting findings as to how the skin friction changes with its thickness [15][16][17]. This study aimed to conduct a detailed investigation of the effects of skin properties on friction.…”

Section: Introductionmentioning

confidence: 99%

“…They reasoned this could be attributed to the fall in the skin lateral stiffness and other changes in the physico-chemical properties. Recently, they carried out a further study and reported that skin tape stripping can generate electric charge on the skin surface that increases the adhesion force between human skin and objects [16]. In the study of Liu et al [17], an Optical Coherence Tomography (OCT) system was used to study the potential relationship between skin properties (e.g.…”

Section: Introductionmentioning

confidence: 99%

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The contributions of skin structural properties to the friction of human finger-pads

Liu

Gad

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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This paper describes three series of tests that were designed to investigate how skin mechanical and structural properties, measured using a "Cutometer" and Optical Coherence Tomography, affect the frictional behaviour of human finger-pads. Firstly, the skin mechanical properties across all fingers and the palm in participants' dominant hands were assessed. Results showed that the distensibility of skin (total deformation in a suction test) is associated with stratum corneum thickness and that this in turn affects friction (thicker stratuem corneum leads to higher friction), giving a link between distensibility and friction.Tape stripping to remove the superficial layer of the skin led to increased moisture (and/or electric charge on the skin surface) led to higher friction. No accompanying changes were seen in structural properties so it was concluded that moisture was the main cause of the adhesion increase. More work is required to isolate moisture and possible changes in electric charge using alternative measurement techniques.When rubbing with sand paper, the stratum corneum thinned considerably and friction reduced. Moisture was ruled out as a cause of friction changes in this instance. Skin normal stiffness also did not change, but lateral stiffness changes have been seen in previous work when the stratum corneum thickness has been reduced so this is likely to be the cause of the reduced friction. This will be investigated further in future work using dynamic OCT measurements.

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Section: Skin Mechanical Propertiesmentioning

confidence: 92%

Section: Electrostatic Forcesmentioning

confidence: 99%

Section: Electrostatic Forcesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The contributions of skin structural properties to the friction of human finger-pads

Liu

Gad

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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Epigenetics for anthropologists: An introduction to methods

Non

Thayer

2015

American J Hum Biol

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The study of epigenetics, or chemical modifications to the genome that may alter gene expression, is a growing area of interest for social scientists. Anthropologists and human biologists are interested in epigenetics specifically, as it provides a potential link between the environment and the genome, as well as a new layer of complexity for the study of human biological variation. In pace with the rapid increase in interest in epigenetic research, the range of methods has greatly expanded over the past decade. The primary objective of this article is to provide an overview of the current methods for assaying DNA methylation, the most commonly studied epigenetic modification. We will address considerations for all steps required to plan and conduct an analysis of DNA methylation, from appropriate sample collection, to the most commonly used methods for laboratory analyses of locus-specific and genome-wide approaches, and recommendations for statistical analyses. Key challenges in the study of DNA methylation are also discussed, including tissue specificity, the stability of measures, timing of sample collection, statistical considerations, batch effects, and challenges related to analysis and interpretation of data. Our hope is that this review serves as a primer for anthropologists and human biologists interested in incorporating epigenetic data into their research programs.

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Skin Microstructure is a Key Contributor to Its Friction Behaviour

et al. 2016

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Due to its multifactorial nature, skin friction remains a multiphysics and multiscale phenomenon poorly understood despite its relevance for many biomedical and engineering applications (from superficial pressure ulcers, through shaving and cosmetics, to automotive safety and sports equipment). For example, it is unclear whether, and in which measure, the skin microscopic surface topography, internal microstructure and associated nonlinear mechanics can condition and modulate skin friction. This study addressed this question through the development of a parametric finite element contact homogenisation procedure which was used to study and quantify the effect of the skin microstructure on the macroscopic skin frictional response. An anatomically realistic two-dimensional image-based multilayer finite element model of human skin was used to simulate the sliding of rigid indenters of various sizes over the skin surface. A corresponding structurally idealised multilayer skin model was also built for comparison purposes. Microscopic friction specified at skin asperity or microrelief level was an input to the finite element computations. From the contact reaction force measured at the sliding indenter, a homogenised (or apparent) macroscopic friction was calculated. Results demonstrated that the naturally complex geometry of the skin microstructure and surface topography alone can play as significant role in modulating the deformation component of macroscopic friction and can significantly increase it. This effect is further amplified as the ground-state Young's modulus of the stratum corneum is increased (for example, as a result of a dryer environment). In these conditions, the skin microstructure is a dominant factor in the deformation component of macroscopic friction, regardless of indenter size or specified local friction properties. When the skin is assumed to be an assembly of nominally flat layers, the resulting global coefficient of friction is reduced with respect to the local one. This seemingly counter-intuitive effect had already been demonstrated in a recent computational study found in the literature. Results also suggest that care should be taken when assigning a coefficient of friction in computer simulations, as it might not reflect the conditions of microscopic and macroscopic friction one intends to represent. The modelling methodology and simulation tools developed in this study go beyond what current analytical models of skin friction can offer: the ability to

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Interpretation of the human skin biotribological behaviour after tape stripping

Cited by 25 publications

References 32 publications

The contributions of skin structural properties to the friction of human finger-pads

The contributions of skin structural properties to the friction of human finger-pads

Epigenetics for anthropologists: An introduction to methods

Skin Microstructure is a Key Contributor to Its Friction Behaviour

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