Association of hydrophobic ions in aqueous solution: A conductometric study of symmetrical tetraalkylammonium cyclohexylsulfamates

2010 ◽  
Vol 156 (1) ◽  
pp. 82-88 ◽  
Author(s):  
Marija Bešter-Rogač ◽  
Cveto Klofutar ◽  
Darja Rudan-Tasic
Keyword(s):  
Aqueous Solution ◽  
Hydrophobic Ions ◽  
Conductometric Study

Conductometric study of the complex system polyelectrolyte/surfactant in aqueous solution

2012 ◽  
Vol 39 (6) ◽  
pp. 2527-2536 ◽  
Author(s):  
L. Tennouga ◽  
K. Medjahed ◽  
A. Mansri ◽  
B. Grassl
Keyword(s):  
Complex System ◽  
Aqueous Solution ◽  
Conductometric Study

A Conductometric Study of Polycation—Polyanion Reactions in Dilute Aqueous Solution

1965 ◽  
Vol 69 (5) ◽  
pp. 1447-1455 ◽  
Author(s):  
Alan S. Michaels ◽  
Leon Mir ◽  
Nathaniel S. Schneider
Keyword(s):  
Aqueous Solution ◽  
Dilute Aqueous Solution ◽  
Conductometric Study

Spectrophotometric and Conductometric Study of Methyl Orange - Cetylpyridinium Chloride Ion Pair in Aqueous Solution

2016 ◽  
Vol 13 (6) ◽  
pp. 1-5 ◽  
Author(s):  
Khaled Edbey ◽  
K. Ttaib ◽  
A. Benhmid ◽  
Fateh Eltaboni ◽  
Abdelqader Imragaa ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Cetylpyridinium Chloride ◽  
Chloride Ion ◽  
Ion Pair ◽  
Conductometric Study

Structures Formed by Cryoprotective Agents Used in Freezc-Etching

1971 ◽  
Vol 29 ◽  
pp. 448-449
Author(s):  
G. G. Cocks ◽  
C. E. Cluthe
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Oxide ◽  
Liquid Nitrogen Temperature ◽  
Ice Crystals ◽  
Etching Technique ◽  
Structural Constituent ◽  
Cryoprotective Agents ◽  
Quick Freezing ◽  
Freeze Etching ◽  
Fractured Surface

The freeze etching technique is potentially useful for examining dilute solutions or suspensions of macromolecular materials. Quick freezing of aqueous solutions in Freon or propane at or near liquid nitrogen temperature produces relatively large ice crystals and these crystals may damage the structures to be examined. Cryoprotective agents may reduce damage to the specimem, hut their use often results in the formation of a different set of specimem artifacts.In a study of the structure of polyethylene oxide gels glycerol and sucrose were used as cryoprotective agents. The experiments reported here show some of the structures which can appear when these cryoprotective agents are used.Figure 1 shows a fractured surface of a frozen 25% aqueous solution of sucrose. The branches of dendritic ice crystals surrounded hy ice-sucrose eutectic can be seen. When this fractured surface is etched the ice in the dendrites sublimes giving the type of structure shown in Figure 2. The ice-sucrose eutectic etches much more slowly. It is the smooth continuous structural constituent surrounding the branches of the dendrites.

Sign in / Sign up

Export Citation Format

Share Document