The phrase "ascertained directly" is correct and usable in written English.
It can be used when referring to information or facts that have been determined or verified through direct observation or measurement.
Example: "The results of the experiment were ascertained directly from the data collected during the trials."
Alternatives: "determined directly" or "verified directly".
(C) The information obtained is recorded by the investigator in such a manner that the identity of the human subjects can readily be ascertained, directly or through identifiers linked to the subjects, and an IRB conducts a limited IRB review to make the determination required by § 225.111(a)(7).
(iii) The information obtained is recorded by the investigator in such a manner that the identity of the human subjects can readily be ascertained, directly or through identifiers linked to the subjects, and an IRB conducts a limited IRB review to make the determination required by § 225.111(a)(7).
The effect of store depletion was ascertained directly by following exposure to the sesquiterpene sarcoplasmic-endoplasmic Ca2+ ATP-ase (SERCA) antagonist thapsigargin (TG; 1 µM).
However, the roles of these motifs remain to be ascertained directly by biochemical and functional analysis, and it seems premature to assume that all motif copies have the same function.
Maternal age, parity, gestational age, smoking quantity and year of delivery will be ascertained directly from the midwifery records.
Hence, the sample was not population based, so we cannot necessarily generalize our results to ET cases ascertained directly from the population of Mersin.
A dimensional analysis was carried out to ascertain directly the maximum tunnel displacement, bending moment, and shear force.
The purpose of this study is to ascertain directly whether cells labeled in the subcortical telencephalon in vivo differentiate into mature cortical interneurons and whether any cortical interneurons arise from the dorsal, cortical neuroepithelium.
Although we were not able to ascertain directly which aspects of the course contributed most to these improvements, we suspect that it was a combination of effects.
To ascertain directly whether AAMs associate preferentially with sites that experience low rates of evolutionary change, we utilized an approach similar to the site analysis used above together with codon evolutionary rate obtained from CODEML in PAML [ 23].
Owing to the lack of information on illness severity in these data, we cannot ascertain directly if less severely ill patients are being hospitalised over time, or whether hospital treatment has helped reduce mortality in the 28 days after admission.
