The phrase "able to observe these" is correct and usable in written English.
It can be used when discussing the capability to notice or perceive specific items or phenomena.
Example: "The researchers were able to observe these changes in behavior during the experiment."
Alternatives: "capable of noticing these" or "able to see these".
Dr Zhang was able to observe these by illuminating it.
In order to provide the correct next intervention, the sensors should be able to observe these states.
By observing juvenile long-billed hermits, scientists were able to observe these behaviors and also measure the gender-specific differences in beak shape that arise as the birds mature.
This has been suggested by results from various molecular typing studies, and we have been able to observe these similarities with an extremely high level of resolution.
As we were not able to observe these cavities by EM of nucleoli in unfractionated intact cells, the INB might either represent an area of reduced structural stability compared to other nucleolar compartments or, alternatively, may be obscured by components that were lost during nucleoli purification.
By photolyzing PIC reagents in the presence of a high concentration of intermolecular interactions (i.e., within a peptide nanostructure), we were able to observe these cross-linking reactions very clearly, and our findings have direct implications for future PIC analyses of biological amyloids and other complexes.
Algal concentrations were deliberately chosen to differ from concentrations of previous experiment so as to be able to observe the effect of these algal concentrations as well.
We utilize measures of both parents' schooling, household wealth, and child growth; we are thus able to observe the relationships between these different household factors.
Together these instruments are able to observe the solar corona ranging from 1.05 to 32 solar radii.
And they will be able to see inside polling stations and may be able to observe the count.
