The phrase "a preliminary proof" is correct and usable in written English.
It can be used when referring to an initial version of a document or evidence that is subject to further verification or revision.
Example: "Before submitting the final report, I will share a preliminary proof with the team for their feedback."
Alternatives: "an initial draft" or "a provisional evidence".
As a preliminary proof of concept of potential application, this approach has been used to demonstrate the detection of the seasonal influenza A virus.
Here I reduce the model to its essential elements and conduct a preliminary "proof of principle" study.
These results provided a preliminary proof that SSTR negative tumor could be transfected with hSSTr2 reporter gene for radionuclide therapy.
Although we use a small set of enzymes here to perform a preliminary proof of principle, this experiment lays the foundation for a method of cellular modeling that will move toward an "omics" approach with potential predictive ability.
It is important to note that this particular biological framework is a preliminary proof of concept and will be modifiable by the user in future iterations of the algorithm.
We did not seek to verify each individual report as truthful, but rather to identify overall associations between Twitter and official spontaneous report data as a preliminary proof of concept.
The current study was intended as a preliminary proof-of-principle study and several limitations should be kept in mind when interpreting the presented results.
Again, a preliminary proof-of-concept clinical study has demonstrated that a single intravenous bolus of CsA given prior to PCI can limit MI size in STEMI patients [ 43].
However, as pointed out by Galiè and Manes, this study should be considered as a very preliminary proof-of-principle study that requires a formal and large multicenter randomized controlled trial to appropriately evaluate a possible new era for the treatment of PAH patients [ 106].
We performed preliminary proof of concept studies in a porcine preparation by performing epicardial ablation.
Phase II trials (3,500 participants) were performed to establish the immunogenicity and tolerability of a range of HPV L1 VLP vaccine dose formulations and provide preliminary proof of concept.
