Studies of aggregation in soap solutions containing salt and simple organic molecules

1953 ◽  
Vol 6 (2) ◽  
pp. 123 ◽  
Author(s):  
G Stainsby ◽  
AE Alexander
Keyword(s):  
Sodium Chloride ◽  
Interfacial Tension ◽  
Physical Properties ◽  
Osmotic Pressure ◽  
Organic Molecules ◽  
Sedimentation Velocity ◽  
Pyridinium Chloride ◽  
Cetyl Pyridinium Chloride ◽  
Pure Soap ◽  
Cetyl Pyridinium

Using the synthetic soap cetyl pyridinium chloride the effects of added chlorobenzene and sodium chloride upon various physical properties, such as saturation solubilities, viscosity, osmotic pressure, sedimentation velocity, and interfacial tension, have been quantitatively measured. The results suggest that the soap micelle has a very labile structure, the approximately spherical aggregates present in pure soap solutions changing to more asymmetric shapes in the presence of suitable concentrations of sodium chloride and chlorobenzene.

scholarly journals Release of cetyl pyridinium chloride from fatty acid chelate temporary dental cement

2015 ◽  
Vol 2 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Andrew Hurt ◽  
Nichola J. Coleman ◽  
Tamer Tüzüner ◽  
Bora Bagis ◽  
Fatih Mehmet Korkmaz ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Pyridinium Chloride ◽  
Dental Cement ◽  
Cetyl Pyridinium Chloride ◽  
Acid Chelate ◽  
Cetyl Pyridinium

scholarly journals COMPARATIVE KINETICS OF HEMOLYSIS INDUCED BY BACTERIAL AND OTHER HEMOLYSINS

1947 ◽  
Vol 30 (4) ◽  
pp. 337-353 ◽  
Author(s):  
Alan W. Bernheimer
Keyword(s):  
Maximum Rate ◽  
Sodium Taurocholate ◽  
Second Phase ◽  
Pyridinium Chloride ◽  
Cetyl Pyridinium Chloride ◽  
Streptolysin S ◽  
Streptolysin O ◽  
Cetyl Pyridinium ◽  
Two Phases ◽  
Kinetics Of

A study has been made of the kinetics of lysis induced by various hemolytic agents. The course of bemolysis was followed by mixing lysin with washed human erythrocytes, removing samples from the mixture, and estimating colorimetrically the hemoglobin in the supernatant fluid of the centrifuged samples. Most of the curves (but not all of them, e.g. tyrocidine) obtained by plotting degree of hemolysis against time, were S-shaped. The initiation of lysis by streptolysin S' was delayed, and in this property, streptolysin S' was similar to Cl. septicum hemolysin. None of the other lysins studied exhibited a long latent period preceding lysis. The maximum rate of hemoglobin liberation was found, in the range of lysin concentrations studied, to be a linear function of concentration when theta toxin of Cl. welchii, pneumolysin, tetanolysin, or streptolysin S' was the lytic agent. With comparable concentrations of saponin, sodium taurocholate, cetyl pyridinium chloride, tyrocidine, duponol C, lecithin-atrox venom mixture, or streptolysin O, the relation between rate and concentration was non-linear. The critical thermal increment associated with hemolysis was determined for systems containing pneumolysin, theta toxin, streptolysin S', streptolysin O, tetanolysin, and saponin. The findings concerning the effect of concentration and temperature on the rate of hemolysis provide a basis for classifying hemolytic agents (Tables I and II). Hemolysis induced by Cl. septicum hemolysin was found to be preceded by two phases: a phase of alteration of the erythrocytes and a phase involving swelling. Antihemolytic serum inhibited the first but not the second phase while sucrose inhibited the second but not the first phase.

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