Editors: | F. Kongoli, Z. Wang, T. Okura, E. Souza, A. C. Silva |
Publisher: | Flogen Star OUTREACH |
Publication Year: | 2018 |
Pages: | 256 pages |
ISBN: | 978-1-987820-94-2 |
ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
The skin is frequently exposed to environmental phenomena that pose high risks for its health, the integrity of its epidermal barrier, and its functionality. One of the main environmental issues for skin is the UV radiation from sunlight that causes erythema. The erythema causes a dilatation of blood vessels with alteration of interleukin 1 levels released by damaged keratinocites of skin. Long term exposures of skin during sunlight hours may cause melanoma and other kinds of cancers. The degree of UV absorption depends from many factors such as UV index, pigments, thickness and hydration, which are also factors in the skin's defense from external injuries. The evaluation of skin hydration become fundamental for the evaluation of the health state of skin, its selective permeability, and functionality. Our work is focused on the application of TVS skin test as a non-invasive tensiometric tool for hydration and surface free energy evaluation of in vivo skin. A new investigation on the influence of blood donation on hydration of skin measured by contact angle method is also reported with the aim to demonstrate the correlations between clinical and tensiometric data. Our approach demonstrated, in a non-invasive way, the possibility to determine the health state of skin in large scale and its functional efficacy. This approach also evaluating simultaneously its surface energy polar component, the water content linked to its polar component, the hydration state, and the capacity of skin to recover its functionality after treatment with a biomimetic activator and after the blood donation of a volunteer panel.