Dissociation of nitrophenols in pyridine. Thermodynamic dissociation constant and homoconjugation constant.

Quantum mechanics investigation of acid dissociation constant of carboxylic acids in aqueous solution

According to the Bronsted definition, any compound which has a hydrogen atom is an acid, since itmay be lost as a proton. A thermodynamical cycle is proposed to calculate absolute pKa values forBronsted acids in aqueous solution. The equilibrium of dissociation of a Bronsted acid depends onthe interaction of the acid and its conjugate base with solvent molecules. There fore the pKa valuedepends...

Dissociation Constant in Nitrogen Fixation by Azotobacter

6 Dodge originally used "A" and "a" to designate the two sex types in Neurospora crassa. Lindegren later substituted the symbols "+" and "-" for these. Because of the desirability of using the symbol + for the normal allele of a gene and also to designate a positive experimental result, we prefer Dodge's original designations. 4 Neither conversion of pimelic acid to p-aminobenzoic acid by the n...

First Dissociation Constant of Succinic Acid from 0° to 50° G and Related Thermodynamic Quantities

The sensitivities of CH4 and CD4 differ by about 2 percent and are probably equal within the experimental uncertainty. The total ionization is apparently the same for CH4, CH3D, and CH?D2. The low value for CHD3 is not significant in view of the uncertainty in this spectrum. The difference in the total ionization of CH4 and CD4, however, is greater than the estimated error; and since the number...

Supporting Text Dimer Dissociation Constant in Vitro and in Vivo

The dimer dissociation constant Kd is defined as the ratio of the concentrations of the monomers ( p1 ) and dimers ( p2 ) in steady state, i.e., Kd = p1 2 p2 . In terms of the basic kinetic parameters (the association rate ka and the dissociation rate kd ), the in vitro dissociation constant is simply Kd (0) = kd ka . However, the effective value of Kd is modified in vivo due to a variety of pr...

Spectrophotometric determination of the dissociation constant of ribonuclease S'.