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Effect of Gaseous Atmosphere on the State of Water in Collagen Influencing Microbial Growth
Author(s) -
SPECCHIO J. J.,
KARMAS E.,
DAUN H.,
PAIK S.,
GILBERT S. G.
Publication year - 1988
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1988.tb09309.x
Subject(s) - sorption , inverse gas chromatography , enthalpy , chemistry , atmosphere (unit) , thermodynamics , gibbs free energy , entropy (arrow of time) , environmental chemistry , standard enthalpy change of formation , gas chromatography , chromatography , adsorption , physics
ABSTRACT The effects of CO 2 and N 2 atmospheres on the thermodynamic state of water influencing microbial response in collagen was studied by generating sorption isotherms by inverse gas chromatography and the static method and calculating thermodynamic parameters of sorption. CO 2 atmosphere significantly increase; water sorption by collagen at 25°C, 30°C, and 35°C compared to N 2 and He. The average binding energies of collagen were significantly increased by CO 2 as shown by larger negative Gibb's free energy (δG s ), isoteric enthalpy of sorption (δH s ) and entropy of sorption (δS s ) values. Water clustering in collagen appeared at a higher water activity (a w ) in CO 2 gas as compared to N 2 ‐ and He‐treated atmospheres at 25°C, 30°C, and 35°C.