The phrase "were not elucidated" is correct and can be used in written English.
It means that something was not explained or made clear. Example: The results of the study were not elucidated in the research paper, causing confusion among readers.
As we all know, the pathological change of intestine induced by neutron irradiation is on the whole elucidated, while the mechanisms of injury were not elucidated completely.
However, the structural details of this analog were not elucidated.
In spite of a lot of recent research results, factors and mechanisms of the inhomogeneous deformation were not elucidated systematically.
Moreover, the toxicity impact of selenium has been reduced with synthesized nano-selenium proposed by Wang et al. [23], and new physiological and biological properties such as its role in microbial inhibition and fatty liver prevention have been explored that were not elucidated earlier.
In these cases the proteases were reported to alter leukocyte infiltration, although the mechanism and substrates were not elucidated.
Although it was previously described that CsA alters the activity of the pump in the kidney [12], the underlying molecular mechanisms were not elucidated.
Whether the affair made Shriver feel the same way is not elucidated.
The best modes are found via backtracking, which is not elucidated here for clarity reasons.
There was also no prospective sample size calculation, and the reasoning behind this was not elucidated.
That connection was not elucidated to the level of specific nucleotide changes in DNA until recently.
However, the mechanism in the impactor was not elucidated by the experimental method.
