DL results have shown a correlation with LDW clusters size as determined by other researchers on the basis of neutron diffraction experiments and computational modelling, as reported in Literature. Spectral and temporal characteristics of DL decays give information on the two components of the mixture, by evidencing the contribution of water at glycerol concentrations close to the values used in cryopreservation. Supported by the results obtained with other aqueous solutions, this paper deals with the possibility of using the ultra-weak delayed luminescence (DL) to investigate water structuring in a mixture with glycerol, characterized only by hydrogen bonds between the various molecules. Many properties of water have been related to the interplay between two distinct and interconverting structural species, namely the low-density water (LDW) and the high-density water (HDW). The crucial role of water in the engine of life have encouraged many researchers in studying, both theoretically and experimentally, the possible “structure” of water. Strohmer F, Gerlach GT (1885) Ueber die Gehaltsbestimmung wässriger Glycerinlösungen (German). Raffel M, Willert CE, Scarano F, Kähler CJ, Wereley ST, Kompenhans J (2018) Particle image velocimetry. Prigogine I, Bellemans A, Mathot V (1957) The molecular theory of solutions. Linstrom P, Mallard W (2005) Thermophysical properties of fluid systems. Jouyban A, Fathi Azarbayjani A, Barzegar-Jalali M, Acree J (2004) Correlation of surface tension of mixed solvents with solvent composition. Hansen J, Schulze T, Moelling K (1987) RNase H activity associated with bacterially expressed reverse transcriptase of human T-cell lymphotropic virus III/lymphadenopathy-associated virus. Glycerine Producers’ Association, New York Glycerine Producers’ Association (1963) Physical properties of glycerine and its solutions. Gerlach GT (1884) Ueber Glycerin, specifische Gewichte und Siedepunkte seiner wässrigen Lösungen sowie über einen Vaporimeter zur Bestimmung der Spannkräfte von Glycerinlösungen (German). Ind Eng Chem Res 47:3285–3288Ĭristancho DM, Delgado DR, Martínez F, Abolghassemi Fakhree MA, Jouyban A (2011) Volumetric properties of glycerol+ water mixtures at several temperatures and correlation with the Jouyban–Acree model. Ind Eng Chem 20:1377–1379Ĭheng NS (2008) Formula for the viscosity of a glycerol–water mixture. Ind Eng Chem 19:506–510īosart L, Snoddy A (1928) Specific gravity of glycerol. Renew Sust Energ Rev 16:2671–2686īosart L, Snoddy A (1927) New glycerol tables. Cambridge University Press, CambridgeĪyoub M, Abdullah AZ (2012) Critical review on the current scenario and significance of crude glycerol resulting from biodiesel industry towards more sustainable renewable energy industry. The presented empirical model is validated in the range between 15 and \(30\,^\circ \) (Supplementary Tables 3, 4, 5).Īdrian RJ, Westerweel J (2011) Particle image velocimetry.
In this work we present an analytical expression to accurately calculate the density of aqueous glycerol solutions.
Although the density of aqueous glycerol solutions has been measured precisely since more than a century, current models show a deviation from measured data of up to \(2\%\). In science, aqueous solutions of glycerol are commonly used for experimental investigations as their density can be adapted by changing the glycerol content in the solution. Glycerol is used in many applications of science and daily life as it is cheap and biologically non-invasive.
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