The phrase "a viable number of" is correct and usable in written English.
It can be used when discussing a quantity or amount that is practical or feasible in a given context.
Example: "We need to ensure that we have a viable number of participants for the study to yield meaningful results."
Alternatives: "an adequate number of" or "a sufficient number of".
Local TV in London is a dead duck and there is precious little sign - despite the hype - that a viable number of people are tuning in to the other English local TV launches in Norwich, Nottingham and Grimsby.
It was necessary to increase the course's catchment area beyond London to attract a viable number of students.
As in every other real-life commerce business, one ought to have pre-sales distribution contracts and a certain, and mostly not a viable, number of purchasers (be it customers or shops).
For endoscopic biopsies, the recommendation is a viable number of representative tumor fragments (ideally 6 8) and, if possible, the pathologist should also perform HER2 testing on another specimen when a negative result is found on a tumor endoscopic biopsy [ 40].
Given the frequent occurrence of HER2 staining variability and the slight difference in HER2-positivity rates between biopsy and surgical specimens, it is strongly recommended that a viable number of representative biopsies (ideally 6 8) be collected for HER2 testing, as one or two samples may not give an accurate HER2 result.
If you know who supplies WiMax locally, they might be able to put a small mast in a position where it would pass on the signal, if it brings them an economically viable number of customers.
Specifically, unc-51 mutants and frh-1 RNAi) frh-1 RNAid animalsed but viable number of progeny (Fig. 6A).
Other studies [ 25, 26] show similar variability in the recovery of Salmonella from egg surfaces and a rapid decline in viable numbers of SE adsorbed to egg surfaces.
Also, an incubation with 100µM THPTS followed by illumination, yielded a 6lg (≥99.999%) decrease in the viable numbers of all bacteria strains tested, indicating that the THPTS drug has a high degree of photodynamic inactivation.
AdiStem™ isolated cells were activated with a photobiostimulator AdiLight with a total viable cell number of 12 × 10/ml fat compared to a standard isolation method with 10 × 10 cells/ml fat [ 105].
Thus, to make the assessment of developmental effects of mixtures of chemicals a viable proposition, a number of practical requirements had to be considered.
