Thermodynamic representation of phase equilibrium behavior of aqueous solutions of amino acids by the modified Wilson model

2007 ◽  
Vol 260 (2) ◽  
pp. 266-274 ◽  
Author(s):  
Rahmat Sadeghi
Keyword(s):  
Amino Acids ◽  
Phase Equilibrium ◽  
Aqueous Solutions ◽  
Equilibrium Behavior ◽  
Wilson Model

Modification of the NRTL and Wilson models for the representation of phase equilibrium behavior of aqueous amino acid – electrolyte solutions

2008 ◽  
Vol 86 (12) ◽  
pp. 1126-1137 ◽  
Author(s):  
Rahmat Sadeghi
Keyword(s):  
Amino Acids ◽  
Phase Equilibrium ◽  
Amino Acid ◽  
Electrolyte Solutions ◽  
Acid Electrolyte ◽  
Amino Acid Molecule ◽  
Local Composition ◽  
Equilibrium Behavior ◽  
Amino Acid Solutions ◽  
Solid Liquid

The extended NRTL and Wilson local composition models for amino acid solutions have been modified for the representation of the phase equilibrium behavior of aqueous amino acid – electrolyte solutions by considering cells with random composition for the reference Gibbs energies or enthalpies of local composition cells with a central amino acid molecule and also with a central ion. These new local composition models, which have a molecular thermodynamic framework, have been used to model the vapor–liquid and solid–liquid equilibrium behavior of amino acids and small peptides in aqueous solutions as functions of temperature, ionic strength, and amino acid compositions. The utility of the models is demonstrated with a successful representation of the activity coefficients and the solubility of several amino acids in different aqueous solutions.Key words: amino acid, NRTL, Wilson, activity coefficient, solubility, aqueous solution.

Phase Behavior of Amino Acids and Peptides in Aqueous Solutions Using the Modified Wilson Model

2006 ◽  
Vol 1 (2) ◽  
pp. 98-105 ◽  
Author(s):  
G.R. Pazuki . ◽  
A. Dashtizadeh . ◽  
M. Edalat .
Keyword(s):  
Amino Acids ◽  
Aqueous Solutions ◽  
Phase Behavior ◽  
Wilson Model

Phase equilibrium behavior of certain pairs of amino acids in aqueous solution

1981 ◽  
Vol 85 (23) ◽  
pp. 3533-3540 ◽  
Author(s):  
Charles E. Messer ◽  
Gary Malakoff ◽  
James Weil ◽  
Sherif Labib
Keyword(s):  
Aqueous Solution ◽  
Amino Acids ◽  
Phase Equilibrium ◽  
Equilibrium Behavior

Imaging polymers, proteins and dna in aqueous solutions with the atomic force microscope

1989 ◽  
Vol 47 ◽  
pp. 32-33
Author(s):  
S.A.C. Gould ◽  
B. Drake ◽  
C.B. Prater ◽  
A.L. Weisenhorn ◽  
S.M. Lindsay ◽  
...  
Keyword(s):  
Amino Acids ◽  
Dna Sequencing ◽  
Aqueous Solutions ◽  
Atomic Force Microscope ◽  
Piezoelectric Crystal ◽  
Atomic Force ◽  
Structure Of Molecules ◽  
Optical Lever

The atomic force microscope (AFM) is an instrument that can be used to image many samples of interest in biology and medicine. Images of polymerized amino acids, polyalanine and polyphenylalanine demonstrate the potential of the AFM for revealing the structure of molecules. Images of the protein fibrinogen which agree with TEM images demonstrate that the AFM can provide topographical data on larger molecules. Finally, images of DNA suggest the AFM may soon provide an easier and faster technique for DNA sequencing.The AFM consists of a microfabricated SiO2 triangular shaped cantilever with a diamond tip affixed at the elbow to act as a probe. The sample is mounted on a electronically driven piezoelectric crystal. It is then placed in contact with the tip and scanned. The topography of the surface causes minute deflections in the 100 μm long cantilever which are detected using an optical lever.

Enthalpic Interactions of Amino Acids with Glucose in Aqueous Solutions at 298.15 K

2003 ◽  
Vol 32 (11) ◽  
pp. 977-985 ◽  
Author(s):  
Huaji Liu ◽  
Ruisen Lin ◽  
Honglin Zhang
Keyword(s):  
Amino Acids ◽  
Aqueous Solutions

Radiation-induced degradation of hydroxyl-containing amino acids in aqueous solutions

2012 ◽  
Vol 46 (4) ◽  
pp. 235-240 ◽  
Author(s):  
A. A. Sladkova ◽  
A. A. Sosnovskaya ◽  
I. P. Edimecheva ◽  
V. A. Knizhnikov ◽  
O. I. Shadyro
Keyword(s):  
Amino Acids ◽  
Aqueous Solutions ◽  
Radiation Induced
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