Dielectric analysis of the thermal processes of human nail

The temperature and frequency dependencies of the dielectric parameters for the human fingernail are used to analyse keratin degradation in high temperatures. Measurements were performed over the frequency range of 100 Hz to 100 kHz and at temperatures from 22 to 260 °C. The nail samples contained 1...

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Bibliographic Details
Published in:Thermochimica acta 2010-07, Vol.506 (1), p.73-76
Main Authors: Marzec, E., Olszewski, J.
Format: Article
Language:English
Subjects:
Activation energy
Biological and medical sciences
Biomaterials
Dielectric properties
Fundamental and applied biological sciences. Psychology
Keratin melting
Medical sciences
Nail keratin
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Technology. Biomaterials. Equipments
Vertebrates: skin, associated glands, phaneres, light organs, various exocrine glands (salt gland, uropygial gland...), adipose tissue, connective tissue
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Summary:The temperature and frequency dependencies of the dielectric parameters for the human fingernail are used to analyse keratin degradation in high temperatures. Measurements were performed over the frequency range of 100 Hz to 100 kHz and at temperatures from 22 to 260 °C. The nail samples contained 11% water by mass at room temperature at a relative humidity of 70%. The results were discussed in terms of the distribution of relaxation frequencies and the activation energy for the conduction and polarization mechanisms in the keratin–water system. The information on the dielectric behavior of the keratin degradation might become handy in course of future research on biomaterials obtained from nail keratin.
ISSN:0040-6031
1872-762X
DOI:10.1016/j.tca.2010.04.018