Ion Pairing and Solvent Relaxation Processes in Aqueous Solutions of Sodium Malonate and Sodium Succinate

2004 ◽  
Vol 108 (36) ◽  
pp. 13789-13795 ◽  
Author(s):  
Andrew Tromans ◽  
Peter M. May ◽  
Glenn Hefter ◽  
Takaaki Sato ◽  
Richard Buchner
Keyword(s):  
Aqueous Solutions ◽  
Sodium Succinate ◽  
Ion Pairing ◽  
Relaxation Processes ◽  
Solvent Relaxation ◽  
Sodium Malonate

Light Scattering Spectra of Water in Trehalose Aqueous Solutions: Evidence for Two Different Solvent Relaxation Processes

2009 ◽  
Vol 113 (22) ◽  
pp. 7874-7878 ◽  
Author(s):  
M. Paolantoni ◽  
L. Comez ◽  
M. E. Gallina ◽  
P. Sassi ◽  
F. Scarponi ◽  
...  
Keyword(s):  
Light Scattering ◽  
Aqueous Solutions ◽  
Relaxation Processes ◽  
Solvent Relaxation ◽  
Scattering Spectra

Reversal of succinate-mediated catabolite repression of alkylsulfatase in Pseudomonas aeruginosa by 2,4-dinitrophenol and by sodium malonate

1978 ◽  
Vol 24 (12) ◽  
pp. 1567-1573 ◽  
Author(s):  
J. W. Fitzgerald ◽  
L. C. Kight-Olliff ◽  
G. J. Stewart ◽  
N. F. Beauchamp
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Induction Period ◽  
Sodium Succinate ◽  
Cell Suspensions ◽  
Atp Content ◽  
Succinate Oxidation ◽  
Sodium Malonate ◽  
Atp Levels ◽  
Sodium Malate ◽  
Stimulation Of

The Kreb's cycle intermediates and related metabolites (e.g., acetate) repressed the induced synthesis of alkylsulfatase in resting cell suspensions of Pseudomonas aeruginosa. At concentrations which caused substantial repression, sodium succinate as well as sodium malate, fumarate, and α-ketoglutarate were oxidized to yield consistently high levels of ATP throughout the induction period. Sodium oxalacetate which was markedly less effective as a metabolite repressor generated high ATP levels only during the first 2 h of the induction period. The addition of 2,4-dinitrophenol or sodium malonate to cell suspensions containing the inducer (sodium hexan-1-yl sulfate) and succinate overcame repression of alkylsulfatase formation and resulted in a reduction in the ATP content to levels found in cells exposed only to inducer. An apparent stimulation of alkylsulfatase induction occurred in the absence of succinate when cells were incubated with 2,4-dinitrophenol and inducer. In this case, the ATP content of the cell suspension fell to levels substantially below those occurring as a result of inducer catabolism. Collectively, these data suggest that the effectiveness of succinate as a metabolite repressor is related to the ATP levels generated as a consequence of succinate oxidation.

Volumetric properties of, and ion-pairing in, aqueous solutions of alkali-metal sulfates under superambient conditions

1996 ◽  
Vol 92 (22) ◽  
pp. 4445-4451 ◽  
Author(s):  
Marek Obšil ◽  
Vladimír Majer ◽  
Jean-Pierre E. Grolier ◽  
Glenn T. Hefter
Keyword(s):  
Alkali Metal ◽  
Aqueous Solutions ◽  
Ion Pairing ◽  
Volumetric Properties

Conductance Studies of Aqueous Succinic Acid

1992 ◽  
Vol 47 (3) ◽  
pp. 493-498 ◽  
Author(s):  
Alexander Apelblat ◽  
Josef Barthel
Keyword(s):  
Aqueous Solutions ◽  
Succinic Acid ◽  
Sodium Succinate ◽  
Equilibrium Constants ◽  
Limiting Conductances

Abstract Conductance measurements of aqueous solutions of succinic acid and of di-sodium succinate were performed from 278.15 to 308.15 K and the limiting conductances λ0 (1/2 Succ2- ) are reported. The Waiden product is independent of temperature: λ0(1/2 Succ2-)*η(T) = 0.503 ± 0.001. The salt conductances closely obey the Onsager limiting law. The evaluation of the equilibrium constants for the primary and secondary steps of dissociation, K1 and K2, and the limiting conductances of the hydrosuccinate ion, λ0(HSucc-), are discussed using the Quint and Viallard conductance equation

Sign in / Sign up

Export Citation Format

Share Document