Sentence examples for difficulty of analytical from inspiring English sources

However, most of the early research using SAMs, including CGE models, is for a single country and region because of the limitations for data collection and the difficulty of analytical tools' application.

The difficulty of analytical separation, quantities, and purity needed for both in vivo and in vitro experiments have limited the progress of toxicity studies examining individual HBCD stereoisomers.

The difficulty of our analytical study is related to the discrete feasible set of allocation block-sizes and also to the objective function (i.e., the sum-correlation function we propose) which is closely linked with the outage probability whose minimization is still an open issue in most non-trivial cases [13].

The difficulty of a comprehensive analytical validation of a highly complex genomic multianalyte assay such as EndoPredict is that there are no evaluation guidelines to cover all relevant aspects.

Nevertheless, there have been no reports on 89Sr and 90Sr in air samples because of analytical difficulty.

In [12, 13], and [14] the weight functions introduced are considered as applications of the discontinuous wave speed problem on a non-homogeneous medium as in our case, while the introduction of the weight function ρ ( x ) which is given by (1.3) as ± signs causes an excess of analytical difficulties.

When evaluating a marker for its importance in vivo, difficulties may arise because of analytical problems relating to its specificity and sensitivity [ 14].

Moreover, there are a number of metabolites of potential toxicologic interest, such as chloral, dichloroacetic acid, and those derived from glutathione conjugation, for which reliable pharmacokinetic data is sparse because of analytical difficulties or low concentrations in systemic circulation.

It is not clear if the large differences in Co and Cr concentrations between individuals and across studies are the results of analytical difficulties or a lack of regulation of those elements in breast milk, or both.

However, there are a number of metabolites of potential toxicologic interest, such as chloral, dichloroacetic acid (DCA), or those derived from glutathione conjugation, for which reliable data are sparse because of analytical difficulties or low concentrations in systemic circulation.

In addition, we include analyses with BDE-209 because detection frequency was close to 50% in maternal serum, it is the only congener still in use in Europe (so concentrations in environmental samples are very likely to increase), and available data on prenatal BDE-209 exposure and their health effects are scarce (mainly because of analytical difficulties).