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The phrase "a direct observation" is correct and usable in written English.
It can be used when referring to an observation that is made firsthand, without any interpretation or inference.
Example: "The scientist made a direct observation of the behavior of the animals in their natural habitat."
Alternatives: "an immediate observation" or "a firsthand observation".
Exact(60)
Using a direct observation approach six therapists were observed during a total of 14 sessions with patients.
An optical spatial mapping of confocal Raman spectra permits a direct observation of the nature of an individual nanowire along the growth direction.
Although neutron-star collisions had been proposed as a source of such GRBs, now there is a direct observation.
This study reports a direct observation on the crack behavior of lithiated Si wafer.
Our theory, combined with experimental data, provides a direct observation of a single Kondo atom phase shift.
We surmise that this might be a direct observation of a 'bootstrap' effect.
When used in scattering experiments this enables a direct observation of the local structure and dynamics of matter.
A direct observation of the water content reduction induced by the cation impregnation in the Nafion® film was achieved.
Moreover, we present a direct observation of the bond length alternation in a pure carbon chain by aberration corrected TEM.
At four schools, they also used a direct observation tool to compare children's movements and postures in garden-based and traditional classroom lessons.
Here, we report a direct observation of carbyne formation and dynamics by in situ transmission electron microscopy.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com