The phrase "allowed the observation of" is correct and usable in written English.
It can be used when discussing the permission or facilitation of observing something, often in a scientific or analytical context.
Example: "The new technology allowed the observation of previously hidden patterns in the data."
Alternatives: "enabled the observation of" or "facilitated the observation of".
The ultrastructural analysis allowed the observation of the arrangement of individual cells within the colonies.
Fatigue life extension due to vacuum environment allowed the observation of a second hardening stage at low plastic amplitude.
Cyclic voltammetry measurements, performed also at low temperatures, allowed the observation of five fullerene-centered reductions for all the species.
The decisive event that allowed the observation of cells was the invention of the microscope in the 17th century, after which interest in the "invisible" world was stimulated.
The confocal Raman spectroscopy characterization allowed the observation of the connectivity of the particles present in the ceramic samples and so a deeper understanding of ionic conductivity.
In vitro bioactivity tests, using incubation protocols in simulated body fluid (SBF), allowed the observation of bone-like apatite formation in the hydrogel formulations containing bioactive nanoparticles.
This allows the observation of differences between cells as observed in the present study.
This method allows the observation of very high frequency phonons, up to the THz region26.
Under these conditions, Laurdan GP did not allow the observation of any effects caused by the unsaturated free fatty acids.
This experiment allows the observation of the flow front during the filling process for different filling velocities and die temperatures.
This allows the observation of discrete diffraction spot evolution even as grain orientations shift and the quantitative evaluation of diffraction intensity.
