Densities and viscosities of aqueous solutions of urea and guanidine hydrochloride at 25° have been measured, and equations are presented which describe their variation with concentration. Densities and viscosities of similar solutions containing additional solutes (buffers, NaCl, β-mercaptoethanol) have been measured, and the possibility of predicting these results from information on solutions containing each solute separately is discussed.
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Kawahara et al. (1966) studied this question.
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