The phrase "a diffusion over a" is not correct and does not convey a clear meaning in written English.
It may be used in contexts discussing the spread or distribution of something, but it requires additional context to be meaningful.
Example: "The study examined a diffusion over a large geographical area, highlighting the patterns of cultural exchange."
Alternatives: "a spread across a" or "a distribution throughout a".
In addition to measuring the diffusion of alginate over 90 min as it slowly diffused into a layer of mucus, we also studied the local diffusion over a few seconds using FRAP.
Recently, some results have been obtained by using mathematical models to predict information diffusion over a time period in online social networks; see e.g. [16 20].
The principal functions of the pulmonary microcirculation, blood oxygenation and CO2 release, are achieved by gas diffusion over a remarkably thin alveolo-capillary barrier.
Li, Pan and Zhang [21, 22] proved the existence of a unique global smooth solution to the initial boundary value problem of 2D inviscid heat conductive Boussinesq equations with nonlinear heat diffusion over a bounded domain with smooth boundary.
It follows, third, that diffusion over a network defined by these evolutionary template matches disseminates evolution-guided inferences over the structural proteome.
Purified HGF or NK4 were added at opposite ends, allowing diffusion over a field of reporter cysts, while taking timelapse GFP fluorescent images.
Crystals of wt SHV-1 β-lactamase were grown using hanging drop vapor diffusion over a well solution containing 21 30% PEG6000 and 0.1 M HEPES, pH 6.8 8.2.
We attribute this difference to the FRAP diffusion co-efficients representing Y1 receptor diffusion over a much greater area than for FCS, in which cytoskeletal and other factors restricting longer range diffusion become more apparent [44,47].
Single-crystalline RuO2 nanowires are obtained for the first time with a diffusion process over large areas.
Previous studies by Wang et al. showed that acetylene (C2H2) has a high activity at low temperatures and a satisfactory intracrystalline diffusion over zeolites.
This can be explained by the fact that the apparent diffusion coefficient is in agreement with the actual diffusion coefficient over a limited range of moisture content only.
