The phrase "are of substantial value" is correct and usable in written English.
It can be used to describe something that holds significant worth or importance, often in a financial or qualitative context.
Example: "The artifacts discovered during the excavation are of substantial value to our understanding of ancient civilizations."
Alternatives: "hold significant worth" or "are highly valuable."
sTREM-1, PCT, and CRP levels are of substantial value for the early diagnosis of sepsis.
In agricultural machinery, processing equipment and other items which are of substantial value and technology, service is a prerequisite.
Essentially, the results achieved in this study are of substantial value to the development of a SA production processes that could be incorporated into a lignocellulosic biorefinery.
As a result, numerous repositories have been created to store and archive data, organisms and material, which are of substantial value to the whole community.
We would respectfully argue that the figures and the data contained therein are of substantial value to the cell cycle community, as this study is the first to document phosphorylation in a large‐scale manner in a minimally perturbed mammalian system, and the first to examine the cell cycle gene expression in this cell lineage.
While these assays are of substantial value to measure specific T cell capacities, these assays fail to detect T cells that lack a particular functional property and consequently cannot be utilised as a generic tool to measure the frequency of antigen-specific T cells.
Or I could sell it; it may be of substantial value.
He is insistent, though, that the fixture will be of substantial value for a number of reasons.
Akers said the letters requested "specific evidential material which Operation Elveden believed is in their possession and control and which is likely to be of substantial value to the ongoing investigation".
Prediction of the protein residues most likely to be involved in ligand recognition is of substantial value in structure-based drug design.
The information and documentation provided by Ms Shobukhova has been of substantial value in uncovering and investigating anti-doping rule violations committed by other individuals, including athlete support personnel.
