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Differential thermal analysis of oral and palmar epithelium
Author(s) -
KAABER SVEND
Publication year - 1974
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1974.tb01915.x
Subject(s) - dehydration , bound water , epithelium , chemistry , fraction (chemistry) , saline , buccal administration , epidermis (zoology) , phosphate , chromatography , anatomy , biochemistry , biology , dentistry , molecule , medicine , endocrinology , organic chemistry , genetics
– Differential thermal analysis has been used to study the number and thermal range of the water‐binding sites in epithelial samples from monkey oral mucosa and palmar epidermis in their hydrated, dehydrated and reliydrated states. Hydration occurred in phosphate buffered saline. Dehydration was performed over saturated salt solutions, and rehy‐dration over water. Hydrated and slightly dehydrated palatal and buccal epithelium demonstrated one free‐water fraction and two bound‐water fractions with endothermal transitions at 103°, 140–160° and 185°C respectively. In rehydrated oral epithelium only one endothermal transition at 135°C was observed. Hydrated and slightly dehydrated palmar epithelium exhibited a similar free‐water fraction at 103°, and three bound‐water fractions at 114°, 135° and 185°C. Rehydrated palmar samples exhibited transitions at 135° and occasionally at 114°C. Dehydrated oral and palmar samples lost their thermal activity gradually. The origin of the bound‐water fractions released at 114° and 135–160°C are discussed.