What's the difference between fugaciousness and fugacity?

Fugaciousness

Definition:

Example Sentences:

(1) Facebook Twitter Pinterest The Reporter, on the other hand, calls it "a fugacious bit of whimsy that can only be judged minor Woody Allen".
(2) However, it may be revealed inconstantly and fugaciously by ultasonic lysis of cells infected by sera containing Dane particles.

Definition:

(a.) The quality of being fugacious; fugaclousness; volatility; as, fugacity of spirits.
(a.) Uncertainty; instability.

Example Sentences:

(1) The use of fugacity provides direct insights into the relative chemical equilibrium partitioning status of compartments, thus facilitating interpretation of experimental and model data.
(2) The fugacity and concentration models are mathematically equivalent and produce identical results.
(3) It is suggested that water in the deep grooves, characteristic of the active sites of many enzymes, may have a substantially higher fugacity than bulk water as indicated, at least qualitatively, by the Kelvin equation based on surface curvature.
(4) From these results, we derive a fugacity-based model for skin permeability that addresses the inherent permeability of the skin, the interaction of the skin with the environmental medium on skin (water or soil), and retains a relatively simple algebraic form.
(5) Concentrations in the environment were calculated using the fugacity model of Mackay and Paterson.
(6) 73, 159-175) of styrene inhalation in rats, with extrapolation to humans, was reformulated with the chemical equilibrium criterion of fugacity instead of concentration to describe compartment partitioning.
(7) Fugacity models have been used successfully to describe environmental partitioning processes which are similar in principle to pharmacokinetic processes.
(8) It is suggested that pharmacokinetic fugacity models can complement conventional concentration models and may facilitate linkage to fugacity models describing environmental sources, pathways, and exposure routes.