scholarly journals Self-Diffusion of Chloride Ions in Manganese Bichloride Crystallites

1972 ◽  
Vol 45 (2) ◽  
pp. 359-361 ◽  
Author(s):  
Yoshihiro Sensui
Keyword(s):  
Chloride Ions ◽  
Self Diffusion

scholarly journals Experimental modeling of convection-diffuse mass transfer in brine of Dombrovskyi quarry (Kalush, Ivano-Frankivsk region)

2020 ◽  
pp. 22-27
Author(s):  
Ya. O. Malkova ◽  
V. V. Dolin ◽  
V. M. Bobkov
Keyword(s):  
Mass Transfer ◽  
Fresh Water ◽  
Spatial Dynamics ◽  
Chloride Ions ◽  
Point Of View ◽  
Tritium Concentration ◽  
Self Diffusion ◽  
Mass Transfer Processes ◽  
Criteria For Evaluation ◽  
Simulated Analysis

The article presents the analysis of diffusion-convective mass transfer processes and their parameters, defines hydrogeochemical criteria for evaluation of brine chemical composition formation in Dombrovskyi quarry of Kalush-Golynske deposit. It has been experimentally determined that the temperature gradient (20 °С) significantly affects the rate of mass transfer in the brines. This is probably due to convection-diffuse processes. The dynamics of processes occurring when fresh water enters the brine surface has been experimentally simulated. Analysis of these data from the point of view of formal kinetics for irreversible process allowed estimating the speed of convection-diffusion process. The rate of self-diffusion of water into saturated brine of galite (D=1,21·10-5 cm2/s) and hydrated (in tritium water) ions of Na+Cl- (D=6,62·10-6 cm2/s) were experimentally studied by the isotope method using the tritium label. According to the spatial dynamics of the half (from equilibrium) tritium concentration, the linear rate of self-diffusion of water into brine (6,56 cm/day) and diffusion of hydrated sodium chloride ions into water (1,10 cm/day) are calculated. At the same time, the change rate of position of half (from equilibrium) tritium concentration in the spatial plan is almost the same: (0,22 cm/day) and (0,23 cm/day), respectively. Mathematical models describing the dynamics of these processes have been constructed. The obtained data make it possible to calculate the rates of salts movement from the depth of the Dombrovskyi quarry to its surface. Estimated amount of fresh water (220 thousand tons), capable to indifundate within a year from the surface to a 100-meter depth in the lower layers of Dombrovskyi quarry brines and dissolve the salt-containing rocks in its sides and the bottom.

Junction of the Epithelium and Lamina Propria of the Bovine Rumen Mucosa

1967 ◽  
Vol 25 ◽  
pp. 68-69
Author(s):  
Al W. Stinson
Keyword(s):  
Osmium Tetroxide ◽  
Squamous Epithelium ◽  
Short Chain Fatty Acids ◽  
Chloride Ions ◽  
Fermentation Products ◽  
Ruminant Species ◽  
Protective Shield ◽  
Stratified Squamous Epithelium ◽  
Lead Hydroxide ◽  
Acetic Acids

The stratified squamous epithelium which lines the ruminal compartment of the bovine stomach performs at least three important functions. (1) The upper keratinized layer forms a protective shield against the rough, fibrous, constantly moving ingesta. (2) It is an organ of absorption since a number of substances are absorbed directly through the epithelium. These include short chain fatty acids, potassium, sodium and chloride ions, water, and many others. (3) The cells of the deeper layers metabolize butyric acid and to a lesser extent propionic and acetic acids which are the fermentation products of rumen digestion. Because of the functional characteristics, this epithelium is important in the digestive process of ruminant species which convert large quantities of rough, fibrous feed into energy.Tissue used in this study was obtained by biopsy through a rumen fistula from clinically healthy, yearling holstein steers. The animals had been fed a typical diet of hay and grain and the ruminal papillae were fully developed. The tissue was immediately immersed in 1% osmium tetroxide buffered to a pH of 7.4 and fixed for 2 hrs. The tissue blocks were embedded in Vestapol-W, sectioned with a Porter-Blum microtome with glass knives and stained with lead hydroxide. The sections were studied with an RCA EMU 3F electron microscope.

Self-diffusion study of bile salt-monoolein micelles determination of the intermicellar bile salt concentration

1983 ◽  
Vol 80 ◽  
pp. 315-323 ◽  
Author(s):  
Marc Lindheimer ◽  
Jean-Claude Montet ◽  
Roselyne Bontemps ◽  
Jacques Rouviere ◽  
Bernard Brun
Keyword(s):  
Bile Salt ◽  
Salt Concentration ◽  
Diffusion Study ◽  
Bile Salt Concentration ◽  
Self Diffusion
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