The phrase "a sample fails" is correct and usable in written English.
It can be used in contexts such as testing, quality control, or research when indicating that a particular sample did not meet the required standards or criteria.
Example: "In the recent quality assessment, a sample fails to meet the safety regulations set by the industry."
Alternatives: "a sample does not pass" or "a sample is unsuccessful".
If a sample failed to yield a called genotype it was reassayed using 70 ng of DNA in the amplification reaction.
Where necessary (if multiple repeat hybridizations for a sample failed to bring the score down), hybridizations with a higher score were used to fill in gaps in the experimental design if they were judged to be acceptable.
The average turnaround time was 7 days over a 6-month span with an average volume of ≥40 specimens per week and a low sample fail rate (<1%), demonstrating its suitability for clinical application.
50 These results were not consistent and not confirmed by successive studies: Lopez-Escamez et al, 51 with a larger sample, failed to demonstrate differences in phenotypic frequencies in Cw07 and no specific association with allele DRB1 1602 in a Spanish population, suggesting that the immunological alterations reported are probably epiphenomenon of the inner ear damage.
The fatigued sample failed in a burst-like fashion in contrast to the non-fatigued sample, which exhibited a distinct localized failure band.
If the sample failed again, a new tissue section was cut from the paraffin block and the yield from the new DNA extraction was used for reassay.
One sample failed to generate a VNTR sequence despite amplification of a ∼280 bp amplicon.
A total of 84 directors, or 0.6percentt of the sample, failed to get support from a majority of shares cast in 2009, the study showed.
One additional euploid sample failed at UCLA as a result of laboratory error, but it was successfully classified by SCMM.
One liver sample failed quality control, resulting in a total of 71 mouse livers profiled.
