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Interactions in 1-propanol-urea-H2O: chemical potentials, partial molar enthalpies, and entropies at 25 degrees C

Article Abstract:

Research was conducted to examine interactions in 1-propanol-urea-H2O. such as the excess partial molar enthalpies, chemical potentials and entropies at 25 degrees C. Results suggest that urea molecules lock into the hydrogen bond network of H2O and keep the connectivity of hydrogen bond intact but reduce the degree of fluctuation characteristic of liquid water. Findings reveal that the transition of mixing scheme in aqueous alcohol plays an important role in the structure and stability of lysozyme.

Hydrogen bonding, Hydrogen bonds, Urea, Lysozyme, Enthalpy, Propanols

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How dilute is the Henry's law region?

Article Abstract:

Research was conducted to examine Henry's law in nonaqueous solutions with no hydrogen bond network. Vapor pressures of n-hexane-c-hexane mixtures a nd the excess partial molar enthalpies at very dilute solutions were measured. Results indicate that the vapor pressure data and the chemical potential data hinted at Henry's law behavior. Results indicate that a finite range of Henry's law could not be located within the experimental technique used.

Hexane, Dilution, Dilution (Chemistry), Vapor pressure

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Spontaneous formation of core/shell bimetallic nanoparticles: A calorimetric study

Article Abstract:

An attempt is made at determining enthalpy gain, if any, in mixing two sets of poly(N-vinyl-2-pyrrolidone) (PVP)-protected nanoparticles. Isothermal titration calorimetry (ITC) is a sensitive technique capable of measuring minute heats of interaction between two reacting species.

Observations, Transmission electron microscopes, Calorimetry, Properties, Structure, Nanoparticles

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