Differential diffusion coefficients of hexamethylenetetramine aqueous solutions

1968 ◽  
Vol 72 (1) ◽  
pp. 149-152 ◽  
Author(s):  
Lucia Costantino ◽  
Vittorio Crescenzi ◽  
Vincenzo Vitagliano
Keyword(s):  
Aqueous Solutions ◽  
Diffusion Coefficients ◽  
Differential Diffusion

scholarly journals Self-Diffusion Coefficients, Aggregation Numbers and the Range of Existence of Spherical Micelles of Oxyethylated Alkylphenols

2021 ◽  
Author(s):  
Victor P. Arkhipov ◽  
Natalia A. Kuzina ◽  
Andrei Filippov
Keyword(s):  
Aqueous Solutions ◽  
Diffusion Coefficients ◽  
The Self ◽  
Self Diffusion ◽  
Aggregation Numbers ◽  
Temperature Ranges ◽  
Spherical Micelles ◽  
Limiting Values

AbstractAggregation numbers were calculated based on measurements of the self-diffusion coefficients, the effective hydrodynamic radii of micelles and aggregates of oxyethylated alkylphenols in aqueous solutions. On the assumption that the radii of spherical micelles are equal to the lengths of fully extended neonol molecules, the limiting values of aggregation numbers corresponding to spherically shaped neonol micelles were calculated. The concentration and temperature ranges under which spherical micelles of neonols are formed were determined.

scholarly journals Diffusion Coefficients in Aqueous Solutions of Beryllium Sulfate at 298 K

1994 ◽  
Vol 39 (4) ◽  
pp. 726-728 ◽  
Author(s):  
Victor M. Lobo ◽  
Ana C. Ribeiro ◽  
Luis M. Verissimo
Keyword(s):  
Aqueous Solutions ◽  
Diffusion Coefficients ◽  
Beryllium Sulfate

scholarly journals Differential Diffusivity Effects in Reactive Convective Dissolution

Fluids ◽  
2018 ◽  
Vol 3 (4) ◽  
pp. 83 ◽  
Author(s):  
V. Loodts ◽  
H. Saghou ◽  
B. Knaepen ◽  
L. Rongy ◽  
A. De Wit
Keyword(s):  
Diffusion Coefficients ◽  
Reaction Rate ◽  
Chemical Species ◽  
Mixing Zone ◽  
Simultaneous Presence ◽  
Dynamic Effects ◽  
Density Profiles ◽  
Differential Diffusion ◽  
Different Types ◽  
Double Diffusive

When a solute A dissolves into a host fluid containing a reactant B, an A + B → C reaction can influence the convection developing because of unstable density gradients in the gravity field. When A increases density and all three chemical species A, B and C diffuse at the same rate, the reactive case can lead to two different types of density profiles, i.e., a monotonically decreasing one from the interface to the bulk and a non-monotonic profile with a minimum. We study numerically here the nonlinear reactive convective dissolution dynamics in the more general case where the three solutes can diffuse at different rates. We show that differential diffusion can add new dynamic effects like the simultaneous presence of two different convection zones in the host phase when a non-monotonic profile with both a minimum and a maximum develops. Double diffusive instabilities can moreover affect the morphology of the convective fingers. Analysis of the mixing zone, the reaction rate, the total amount of stored A and the dissolution flux further shows that varying the diffusion coefficients of the various species has a quantitative effect on convection.

Diffusion coefficients in aqueous solutions of potassium perchlorate at 298 K

1982 ◽  
Vol 27 (10) ◽  
pp. 1509-1512 ◽  
Author(s):  
V.M.M. Lobo ◽  
M. Helena ◽  
S.F. Teixeira ◽  
J.L. Quaresma
Keyword(s):  
Aqueous Solutions ◽  
Diffusion Coefficients ◽  
Potassium Perchlorate

Generalized concentration dependence of globular protein self-diffusion coefficients in aqueous solutions

Biopolymers ◽  
2002 ◽  
Vol 63 (2) ◽  
pp. 132-140 ◽  
Author(s):  
Irina V. Nesmelova ◽  
Vladimir D. Skirda ◽  
Vladimir D. Fedotov
Keyword(s):  
Aqueous Solutions ◽  
Concentration Dependence ◽  
Diffusion Coefficients ◽  
Globular Protein ◽  
Self Diffusion

scholarly journals Diffusion coefficients and electrical conductivities for calcium chloride aqueous solutions at 298.15K and 310.15K

2008 ◽  
Vol 54 (2) ◽  
pp. 192-196 ◽  
Author(s):  
Ana C.F. Ribeiro ◽  
Marisa C.F. Barros ◽  
Ana S.N. Teles ◽  
Artur J.M. Valente ◽  
Victor M.M. Lobo ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Calcium Chloride ◽  
Diffusion Coefficients ◽  
Electrical Conductivities

scholarly journals Diffusion coefficients of lead (II) nitrate in nitric acid aqueous solutions at 298 K

2004 ◽  
Vol 111 (1-3) ◽  
pp. 33-38 ◽  
Author(s):  
Artur J.M. Valente ◽  
Ana C.F. Ribeiro ◽  
Victor M.M. Lobo ◽  
A. Jiménez
Keyword(s):  
Nitric Acid ◽  
Aqueous Solutions ◽  
Diffusion Coefficients
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