title: Study on osmotic pressures for aqueous lysozyme and alpha-chymotrypsin-electrolyte solutions with two Yukawa potentials.
abstract: The equation of state (EOS) of Duh and Mier-y-Terán for one Yukawa potential is expanded to two Yukawa potentials to describe the nonidealities of the charged lysozyme and alpha-chymotrypsin solutions. Instead of the classical DLVO theory, the attractive dispersion and double-layer repulsion interactions are represented by two Yukawa potentials, respectively. For the aqueous lysozyme solutions, the only adjustable dispersion energy parameter epsilon/k is regressed and the average deviation is 1.76%. For the aqueous alpha-chymotrypsin solutions, two adjustable parameters (the molecular weight and dispersion energy parameter) are regressed and the average deviation is 7.62%. Some correlation and prediction results are discussed.
authors.affiliation: Department of Chemical Engineering, Tsinghua University, Beijing, 100084, People's Republic of China.
authors.forename: Yang-Zheng
authors.initials: YZ
authors.lastname: Lin
authors.forename: Yi-Gui
authors.initials: YG
authors.lastname: Li
authors.forename: Jiu-Fang
authors.initials: JF
authors.lastname: Lu
mesh_terms: D002918:Chymotrypsin / Q000737:chemistry*; D004573:Electrolytes / Q000737:chemistry; D007700:Kinetics; D009113:Muramidase / Q000737:chemistry*; D009997:Osmotic Pressure
chemical_list: D004573:Electrolytes; D009113:Muramidase; D002918:Chymotrypsin; C117608:alpha-chymotrypsin