For this purpose, absolute and unknown stereochemical descriptors can be employed, as shown below (left structure is absolute, the C-BrC2H stereocenter in the right structure is unknown): Diagram 25 ᅟ.
However, in the development of the subsequent K-means algorithm, the distance function uses the absolute error.For unknown samples, the K value in the K-means algorithm cannot be accurately estimated in advance.
For absolute quantification, unknown concentrations of samples can be compared with already established standard curves, where at least one single standard sample of known concentration falling within the range of the imported curve has to be included in each PCR run to serve as a reference.
To offset the effect of unknown absolute correlation, the mechanical results presented here reflect the ratio of pressure, rather than the absolute magnitude of pressure results, in the pre- to postoperative comparisons.
The onset of ischemia was considered to be within 12 h, but the absolute time was unknown.
The f value itself is not adequate to answer this question because the absolute minimum is unknown.
However, well designed studies with cases and controls should reveal imbalances among microbial taxa, even though absolute abundances remain unknown.
Our approach, which has much less demanding information requirements, demonstrates that information collected from systematic surveys is valuable to species conservation even when the absolute population is unknown and/or the power of the surveys to detect trends is limited [53].
Their absolute ages are unknown, limiting their applicability.
Again, regrettably, such truth in absolute terms is unknown and unobtainable.
