The phrase "ascertaining the origin" is correct and usable in written English.
It can be used in contexts where you need to determine or establish the source or beginning of something.
Example: "The researchers focused on ascertaining the origin of the ancient artifacts found at the excavation site."
Alternatives: "determining the source" or "establishing the origin."
Furthermore, Cameroon is home to two chimpanzee subspecies, which makes ascertaining the origins of these chimpanzees important for reintroduction planning and for scientific investigations involving these chimpanzees.
We also scrutinized the methods section of all the original articles to ascertain the origin of data with special emphasis on whether the research was carried out in RoW countries.
We were engrossed in trying to ascertain the origin of something on a skewer when I felt a faint brush against my shoulder bag and turned around to see a woman dart off into the crowd.
Further work is clearly to ascertain the origin of these defects.
The lack of histological or biopsy information did not allow us to ascertain the origin of the nodules.
Point sources have been fairly well characterized; however, non-point sources (NPS), such as agricultural fields, require further study to ascertain the origin and physicochemical forms of P.
In order to ascertain the origin of the efflorescence it would be of interest to look first at the content of inorganic components in wood.
Thus, to ascertain the origin of the increased serum LDH as occasioned by treatment with extract, the differential diagnosis may need to be carried out.
In both cases the RC was involved with severe pain and functional impairment that required an arthroscopic second look to ascertain the origin and the characteristics of the mass.
The activity follows the trend: Cu-TNU-9 > Cu-ITQ-2 > Cu Y, and in situ electron paramagnetic resonance (EPR) and infrared (IR) spectroscopies have been used to ascertain the origin of their different behavior.
