Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 93: Issue 2
Fractions of thermodynamic functions for native lysozyme adsorption onto moderately hydrophobic surface
Authors:
X. Geng Xi’an Polytechnic University College of Environment & Chemical Engineering Xi’an 710048 China

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M. Zheng Xi’an Polytechnic University College of Environment & Chemical Engineering Xi’an 710048 China

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B. Wang Peaking University Institute of Physical Chemistry Beijing 100871 China

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Z. Lei Xi’an Polytechnic University College of Environment & Chemical Engineering Xi’an 710048 China

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X. Geng Northwest University Institute of Modern Separation Science Xi’an 710069 China

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Pages:
503–508
Online Publication Date:
22 Jul 2008
Publication Date:
01 Aug 2008
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-007-8676-5
Keywords:
adsorption; calorimetry; fractions of thermodynamic functions; hydrophobic surface; lysozyme
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Abstract  

Calorimetric measurement of adsorption enthalpies of native lysozyme(Lyz) on a moderately hydrophobic surface at 25°C, pH 7.0 and various salt concentrations was performed. Based on the thermodynamics of stoichiometric displacement theory (SDT), we calculated the fractions of thermodynamic functions involving four subprocesses during a displacement adsorption process from the directly determined enthalpies in combination with adsorption isotherm measurements. The thermodynamic fractions reveal the relative degree of the four subprocesses for contributions to enthalpy, entropy and free energy. The results show that native Lyz adsorption on a moderately hydrophobic surface is an entropy driven process contributed mainly by conformational loss of adsorbed Lyz.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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