pKa


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pKa

The negative decadic logarithm of the ionization constant (Ka) of an acid; equal to the pH value at which equal concentrations of the acid and conjugate base forms of a substance (often a buffer) are present.

pK a

/pK a/ the negative logarithm of the ionization constant (K) of an acid, the pH of a solution in which half of the acid molecules are ionized.

pKa

the negative logarithm of the ionization constant of an acid, a measure of the strength of an acid. The lower the pKa, the stronger the acid.

PKA

abbreviation for protein kinase.

pKa

The negative decadic logarithm of the ionization constant (Ka) of an acid; equal to the pH value at which equal concentrations of the acid and conjugate base forms of a substance (often a buffer) are present.

p,

n a mathematical function analogous to the calculation of pH. It is the negative log (p) of the constant of acid dissociation (
Ka). When the p
Ka of a buffering agent equals the pH of the solution to be buffered, the buffering system is most effective. According to the Henderson Hasselbach equation, p
Ka = pH + log ([HOAc]/[OAc-]).
References in periodicals archive ?
The pacemaker current--and, consequently, the rate of automaticity of cardiac nodal cells--are subject to regulation by cAMP, both directly and through PKA (Baruscotti and Difrancesco 2004).
The discovery that Trichostatin A can inhibit contractions, presumably due to its effect on PKA, means that this drug could potentially be used to prevent premature labour.
Our immunocytochemical studies showed that granulosa cells were positive for PKA when cells received only vehicle.
Mice deprived of their RII-beta gene are forced to substitute another subunit, RI-alpha, to construct the PKA enzyme.
The funds will pay for human clinical trials of the anoDyne(TM) microneedle from PKA SoftTouch Corp.
Novo A/S and PKA led the expansion with investments of[euro]20 million each, while Danica Pension participated with its pre-financing ownership share of the additional financing.
Secretary, PKA said men will be taking part in eight weight categories including 50kg, 55kg, 60kg, 65kg, 75 kg and above 75kg, individual kata and team kata while women will be displaying their potential in 48kg, 52kg, above 52kg and individual kata.
The scientists focused their study on two molecules, MAPK and PKA, which earlier research has shown to be involved in many forms of memory and synaptic plasticity -- that is, changes in the brain that occur after neuronal interaction.
Tomosyn interacts with a group of proteins known by the acronym SNARE, and that interaction is regulated by an enzyme called PKA, which has been shown to be important for learning.