The phrase 'has been mostly obtained' is correct and usable in written English.
You can use it when you need to express that something has been achieved to a significant degree. For example, "The necessary information for the project has been mostly obtained."
As CMAS deposits observed on ex-service parts present complex and highly variable compositions, progress in the understanding of the interaction mechanism between CMAS and TBC has been mostly obtained during laboratory experiments using simplified CMAS compositions.
At the cellular level, however, our understanding of VRAC in the CNS cells has been mostly obtained from study of primary cell cultures [9], [11], [14], [26], [38], [39], that it remains to be determined whether neurons and astrocytes in the intact brain express VRAC similar to their counterparts in the cell culture conditions.
Multidecadal insight has been mostly obtained through paleolimnological studies involving lake sediment cores and time series of fish Hg concentrations.
The data in support of the interplay between OxS and PO onset have been mostly obtained from in vitro and animal experiments, which, overall, suggest a potential role of reactive species in uncoupling bone turnover [ 7, 8, 23].
However, data-analysis has been mostly performed after obtaining Raman spectrum in off line algorithm establishment before a fully automated on-line Raman spectral diagnostic system was developed for real-time in vivo cancer detection at endoscopy [ 45].
This has been mostly investigated using Wisconsin Card Sorting Test (WCST), and verbalization has been found the most efficacious procedure to obtain the performance improvement.
Solid state fermentation has been mostly employed for bioconversion processes.
