The Diffusivities of Concentrated Sucrose Solutions¹

Abstract

The structure consists of slightly distorted octahedrally coordinated complexes of two glycine residues and two water molecules about the nickel atoms. These complexes are held to each other by strong oxygen-to-oxygen hydrogen bonds and by both strong and weak nitrogen-tooxygen hydrogen bonds.Because of the unfortunate orientation of the molecule with respect to the axes of the crystal, some of the parameters were not evaluated from projections but were in part calculated from assumed interatomic distances.The structure of the glycine residues is substantially the same as that found by Corey and Albrecht1 for glycine.

Kinetics of Sucrose Crystallization.

“…Table I and Figure 1 represent schematically the activation energies of the processes of crystallization, diffusion, and viscosity of sucrose solutions. The values are computed from the data of Kucharenko (2,16), Van Hook (27,28,29), Lmgham and Jackson (4), and Landt (2, 17). (Taimni's viscosity data and equations seem to be somewhat irregular at higher concentrations, 24.)…”

“…The facts expressing the behavior of pure sucrose solutions are that values of k (16,27) increase and values of D decrease (29) with increasing concentration under conditions equivalent to constant O and V. Decreasing diffusivities are also expressed by the transposition (29)…”

Transport Characteristics of Porous Cellulose Actate Membranes for Reverse Osmosis Separation of Sucrose in Aqueous Solutions

“…Osmotic Pressure, Molar Density, Kinematic Viscosity, and Diffusivity Date. These data, given in Table I for the system sucrose-water at 25°C ., were computed from the water activity, density, viscosity, and diffusivity data given in the literature (Hook and Russell, 1945; Robinson and Stokes, 1959;Timmermans, 1960). Similar data for the system sodium chloride-water have been reported (Kimura and Sourirajan, 1968a equations relating the pure water permeability constant, A, the transport of the solvent water, NB, the solute transport parameter, DAM/Kb, and the mass transfer coefficient, k: a =_wn_ a) Mw X 7.6 X 3600 X P…”