curvilinearly related to concentration. At given concentrations, ψ s increased linearly with
temperature. The effects of concentration and temperature on ψ s of PEG-6000 solutions
differ from those for most salts and sugars and apparently are related to structural changes
in the PEG polymer. Measurements of ψ s with thermocouple psychrometers are more
negative than those with a vapor pressure osmometer, with the psychrometer probably …