Sodium Chloride in Supercritical Water as a Function of Density: Potentials of Mean Force and an Equation for the Dissociation Constant from 723 to 1073 K and from 0 to 0.9 g/cm3

2008 ◽  
Vol 112 (24) ◽  
pp. 7289-7297 ◽  
Author(s):  
Wenbin Liu ◽  
Robert H. Wood ◽  
Douglas J. Doren
2014 ◽  
Vol 5 (1) ◽  
pp. 3
Author(s):  
Mohd Hafif bin Mohamad Jamel Basha ◽  
Yukihiko Matsumura ◽  
Yutaka Nakashimada ◽  
Toshinori Tsuru ◽  
Tomoaki Minowa ◽  
...  

Author(s):  
Shiv Prakash Mishra

In article, we have been reported the study of a concentration effect of sodium chloride (NaCl) salt on benzoic acid solubility and its dissociation in water at 298 K temperature. At this temperature the benzoic acid solubility into water and their dissociation value for six samples in range of 0.00, 0.05, 0.10, 0.30, 0.40 and 0.50 M. Each of these different ionic strength or concentration of sodium chloride is analyzed by titrimetrically against of 0.05 M sodium hydroxide (NaOH) basic solution. The pH of each solution is measured well by using of calibrated pH-meter. Observation reveals that the value of pH of benzoic acid into water at applying temperature is may inversely related with concentration of NaCl. Graphically, the value of ionic strength (I) of that benzoic acid is plotted versus with dissociation constant (Kc) of acid into water at specific 298 K temperature. The value of benzoic acid dissociation constant for given each six concentration of NaCl is found to be -4.169, -4.045, -3.993, -3.885, -3.848 and -3.788, respectively.


1982 ◽  
Vol 47 (12) ◽  
pp. 3243-3251 ◽  
Author(s):  
Wang Er-kang

Antimonous ions yield in a solution of 4M sodium chloride a well-defined reduction wave. With increasing concentration of EDTA or CDTA a new cathodic wave appears at more negative potentials. The first (more positive) wave is kinetically controlled. We calculate the stability constant and the thermodynamic functions of antimony(III) complexone complexes from the shift of half-wave of the kinetic wave and their dissociation constant from the kinetic current under given conditions, β = 3 . 1019, kd = 2.8 . 1013 s-1 for SbY, β = 6 . 1024, kd = 8.8 . 1018 s-1 for SbZ. The rate constant of electrode reaction proper of the antimony(III) complexes with complexone is also calculated and the mechanism of the whole process is discussed.


1990 ◽  
Vol 94 (20) ◽  
pp. 7978-7985 ◽  
Author(s):  
Andrew G. Dickson ◽  
David J. Wesolowski ◽  
Donald A. Palmer ◽  
Robert E. Mesmer

1994 ◽  
Vol 267 (3) ◽  
pp. R628-R634 ◽  
Author(s):  
K. Yasunari ◽  
M. Kohno ◽  
K. Yokokawa ◽  
T. Horio ◽  
T. Takeda

The modulation of dopamine DA1 receptors of cultured rat renal arterial smooth muscle cells by glucocorticoid and sodium chloride was studied. At a concentration of 10 nM, the synthetic glucocorticoid dexamethasone increased maximum receptor binding but had no effect on the dissociation constant. However, the maximum binding of [3H]Sch-23390 in cells treated with 100 mM sodium chloride did not change. However, the dissociation constant for DA1 receptor was increased by adding sodium chloride. The glucocorticoid effect on DA1 of arterial smooth muscle cells became apparent after hours of incubation in the presence of the steroid and was significantly inhibited by cycloheximide (10 micrograms/ml) or by the glucocorticoid receptor antagonist RU-38486, indicating that the effect required protein synthesis through glucocorticoid receptors. Treatment of cells with 1 microM dexamethasone for 24 h increased basal and DA1-stimulated adenylate cyclase activity. Basal adenylate cyclase was decreased by sodium chloride in a dose-dependent manner. These results suggest differential control of DA1 receptors on vascular smooth muscle cells by glucocorticoid or sodium chloride.


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