NDLI: Thermal and vibrational characterization of human skin : Influence of the freezing process

Content Provider	Springer Nature Link
Author	Tang, Rong Samouillan, Valerie Dandurand, Jany Lacabanne, Colette Nadal Wollbold, Florence Casas, Christiane Schmitt, Anne Marie
Copyright Year	2016
Abstract	For a better understanding of the molecular and organizational changes in human dermis, biophysical methods were tested. The aim of this study was to find suitable and reproducible biomarkers for further clinical studies on intrinsic and extrinsic aging of dermis. Thermoporometry, hydric organization and thermal transitions of fresh and frozen skins were determined by differential scanning calorimetry (DSC). Fourier transform infrared spectroscopy (FTIR) was used to identify the absorption bands of the dermis especially in the 1800–1000 cm$^{−1}$ zone and to discriminate between the different secondary structures of proteins. A widening of the pore size distribution is evidenced with freezing, but there is no significant difference between the hydric organization and the endothermic collagen denaturation of fresh and frozen skins. The global FTIR spectra and the second derivative spectra in the scanned zone are also identical in fresh and frozen dermis, validating the storage protocol. DSC and FTIR are well-suited techniques to characterize human skin, giving accurate results with high reproducibility. The acquisition of thermal and vibrational biomarkers of the skin at the mesoscale and nanoscale contributes to its better knowledge and is promising for further studies on skin aging.
Starting Page	1143
Ending Page	1154
Page Count	12
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	127
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-03-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Collagen denaturation DSC Fourier transform infrared spectroscopy Human skin Hydration structures of proteins Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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