Ultrasonic wave spectroscopy study of sugar oligomers and polysaccharides in aqueous solutions: The hydration length concept

Monitoring the aggregation behaviour of self-assembling polymers through high-resolution ultrasonic spectroscopy

“…Several authors report that compressibility of solutes and their closely associated water molecules are negligible (Aeberhardt et al, 2005;Van Durme et al, 2005;Burakowski and Glinski, 2007;Kushare et al, 2007), thus a desolvation process leads to an increase of free water in the system and consequently to higher compressibility.…”

Predictions of Glass Transition Temperature for Hydrogen Bonding Biomaterials

“…An alternative way for obtaining the hydration number is via ultrasonic measurement of the solution compressibility. It is stated that the hydration number is obtained from the relation between compressibility and the number of moles of solute, using the assumption that hydration water compressibility is negligible. , Another method for obtaining hydration water is via viscometry, where it is assumed that the intrinsic viscosity is related to the effective size of the solute, which includes the hydration shell. It is argued that the dynamics of water in the hydration shell is slower than in the bulk, and they are dragged with the solute under flow conditions .…”

Effect of phosphate buffer on the micellisation process of Poloxamer 407: Microcalorimetry, acoustic spectroscopy and dynamic light scattering (DLS) studies

“…As reported in the literature, desolvation, which occurs during micellisation, involves an increase of compressibility and, therefore, lead to a reduction of sound speed [35]. Since the effect of solutes and their closely associated water molecules on the entire compressibility is almost negligible [36][37][38][39], then an increase of compressibility and consequently of sound speed can be obtained only if there is an increment of free water in the system. Acoustic measurements were successfully used to determine the characteristic temperatures of micellisation process [31].…”