The phrase "ascertain activity" is correct and usable in written English.
It can be used when referring to the process of determining or finding out specific actions or behaviors.
Example: "In order to improve our performance, we need to ascertain activity levels during peak hours."
Alternatives: "determine actions" or "identify activities."
Self-report was used to ascertain activity relative to others of the same age (because objective evaluation comparing to non-participants cannot be done, as non-participants have not consented to participate).
The most recent study, for example, using an Affymetrix platform to ascertain activity of over 12,000 genes found 110 genes that were up-regulated, and 29 that were down-regulated in association with labor [ 99].
In these instances, the use of retinal thickness maps is helpful to ascertain lesion activity.
This statistical method will be used to ascertain unusual activity in specific geographic areas.
A killing assay was used to ascertain gentamicin activity was undiminished by possible interaction with the calcium-phosphate.
To ascertain the activity of mir-376a2, pri-mir-376a2 was co-expressed with the luciferase reporters so that the amount of DNA was constant.
The ascertained immunological activity of these new anti-E5 vaccines prompted us to determine the therapeutic potential of these DNA vaccines in the C3 pre-clinical model.
Both exams included a standardized personal interview, physical examination, medication review, laboratory testing, and a 1-week pedometer log for ascertaining physical activity levels.
It would be interesting to ascertain relevant activities in the mammary gland as a tissue subjected to a wide range of hormonal changes and where paracrine interactions may affect stem cell fate.
Finally, in order to ascertain whether total activity or moderate-vigorous physical activity was the stronger predictor variable, we assessed the associations of log fat mass on total activity (per 100 counts/min) and moderate-vigorous physical activity (per 15 min) by adjusting total activity for moderate-vigorous physical activity and vice versa.
The electrogenic activities of ten different genera of cyanobacteria were tested to ascertain whether electrogenic activity is a general cyanobacterial phenomenon.
