ABSTRACT

Viscosities of (L-alanine/ L-threonine/ glycylglycine + 1 mol*L-1 aqueous glucose / 1 mol*L-1 aqueous sucrose) systems have been determined as a function of molal concentration of amino acid/peptide at different temperatures: (298.15, 303.15, 308.15, 313.15, 318.15, 323.15, and 328.15) K. Using the viscosity values of the solvent and solution, viscosity B-coefficients, activation free energy, activation enthalpy and activation entropy values have been computed. The computed Jones-Dole B-coefficients and activation free energy values have been discussed in terms of ionic-hydrophilic, hydrophilic-hydrophilic and hydrophilic-hydrophobic interactions; and structure-making / structure-breaking tendency of amino acid / peptide molecules.

Compounds

#	Formula	Name
1	C6H12O6	D-glucose
2	C3H7NO2	(S)-2-aminopropanoic acid
3	H2O	water
4	C12H22O11	D-sucrose
5	C4H9NO3	L-threonine
6	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	1 2 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	48
POMD	2 4 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 2; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 4; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	42
POMD	1 5 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	48
POMD	4 5 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 5; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 4; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	42
POMD	1 6 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 1; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	48
POMD	4 6 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 6; Liquid	Pressure, kPa; Liquid Solvent: Molality, mol/kg - 4; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	42
POMD	1 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 1; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	12
POMD	4 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid Molality, mol/kg - 4; Liquid	Liquid	Capillary tube (Ostwald; Ubbelohde) method	6

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Effects of Concentration and Temperature on Interactions in (L-Alanine/ L-Threonine/ Glycylglycine + Aqueous Glucose / Aqueous Sucrose) Systems: Insights from Viscosity Measurements

Riyazuddeen, Usmani, M. A.[Mohd Amil]

ABSTRACT