ABSTRACT

Ultrasonic velocity and density values of l-histidine or l-glutamic acid or l-tryptophan or glycylglycine + 2 mol*L-1 aqueous KCl or 2 mol*L-1 aqueous KNO3 solution have been measured as functions of amino acid or dipeptide concentration and temperature from T = (298.15 to 323.15) K. Using ultrasonic velocity and density data, the thermodynamic parameters isentropic compressibility (?s) and change in isentropic compressibility values have been computed. The ?s values decrease with an increase in the amino acid/dipeptide concentration as well as with temperature of the systems under investigation. The decrease in ?s values with an increase in concentration of amino acid/dipeptide in aqueous solutions of KCl and KNO3 has been ascribed to an increase in the number of incompressible zwitterions in the solutions.

Compounds

#	Formula	Name
1	ClK	potassium chloride
2	H2O	water
3	KNO3	potassium nitrate
4	C6H9N3O2	L-histidine
5	C5H9NO4	L-glutamic acid
6	C11H12N2O2	L-tryptophan
7	C4H8N2O3	glycylglycine

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	4 1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	54
POMD	4 1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid	Liquid	PYCNOM:UFactor:2	54
POMD	5 1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	42
POMD	5 1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid	Liquid	PYCNOM:UFactor:2	42
POMD	6 1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	48
POMD	6 1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid	Liquid	PYCNOM:UFactor:2	48
POMD	7 1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	54
POMD	7 1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid	Liquid	PYCNOM:UFactor:2	54
POMD	4 2 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	53
POMD	4 2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 4; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid	Liquid	PYCNOM:UFactor:2	54
POMD	5 2 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	42
POMD	5 2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid	Liquid	PYCNOM:UFactor:2	42
POMD	6 2 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	48
POMD	6 2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid	Liquid	PYCNOM:UFactor:2	48
POMD	7 2 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	54
POMD	7 2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 7; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 3; Liquid	Liquid	PYCNOM:UFactor:2	54
POMD	1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 1; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	6
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 1; Liquid	Liquid	PYCNOM:UFactor:2	6
POMD	2 3	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 3; Liquid Frequency, MHz; Liquid	Liquid	LVPAI:UFactor:2	7
POMD	2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 3; Liquid	Liquid	PYCNOM:UFactor:2	6

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Ultrasonic Velocities and Densities of l-Histidine or l-Glutamic Acid or l-Tryptophan or Glycylglycine + 2 mol*L-1 Aqueous KCl or KNO3 Solutions from (298.15 to 323.15) K

Riyazuddeen, Altamash, T.[Tausif]

ABSTRACT