In general, the appearance of data clusters corresponding to integer copy numbers is a strong indicator of CNV measurement accuracy and a useful basis for quality control of measurement data (24– 24).
Numerous analytical and statistical issues, such as the proper control of measurement error in metric traits e.g. [ 21- 23], and the difficulty of reliably estimating DI using single traits [ 6, 7, 23, 24], might provide at least partial explanation for the conflicting results.
The readings were taken with permanent control of gap measurements with TruGap in 0.099 mm increments and the measuring cell Toolmaster CP 50 and precise temperature control using T-Ready and the software Rheoplus V3.61.
In addition to their utility for cross-platform comparison and measurement uncertainty considerations, we sought to demonstrate that RNA standards can also facilitate internal quality control of biomarker measurements in terms of differential expression analysis and multigene expression profiling techniques.
The precision, accuracy, and quality control of the measurements are described elsewhere (Otsuji-Hatori et al. 1996).
The results of this study can thus be seen as an important step towards standardization and image quality control of PET measurements in the context of PET/MR hybrid imaging.
PCR methods depend on certified reference materials, which are used for the calibration or quality control of GMO measurements.
Quality control of the measurements was performed using the reference material randox assay human serum level 2 (Randox, Antrim, UK).
With these control sera, appropriately diluted for the quality control of CSF measurements [ 16], inter-assay CVs of 9.8% at 0.8 mg/l kappa FLC and 5.8% at 1.5 mg/l lambda FLC were determined.
So an observatory requires stable variometers; good control of the measurement; and regular, precise absolute measurements.
