Entropy and enthalpy for triggering cutaneous erythema

Journal of Innovative Optical Health Sciences

Steven L. Jacques¹  Joseph T. Walsh¹ 

[1] Wellman Laboratories, Massachusetts General Hospital, Boston, MA, USA;

关键词: Skin;    erythema;    thermal;    entropy;    enthalpy;   

DOI  :  10.1142/S1793545815500261

来源: DOAJ

【 摘 要 】

The molar entropy (ΔS) and molar enthalpy (ΔH) for the denaturation event that triggers cutaneous erythema was determined to be ΔS = 190 J/(mole K) and ΔH = 146.9 × 103 J/mole. The experiment involved placing heated water against the skin of the forearm, for a range of temperatures and exposure times. Exposing the skin to 45°C for 22 s was at the threshold for producing erythema, which was similar to the threshold for a slight degree of pain.

【 授权许可】

Unknown