Sentence examples for difficulty of sample from inspiring English sources

And it is difficult to use a SEM cross section to measure directly the thickness of nano-oxide thin films deposited on the inner surface of glass MCP pores because of difficulty of sample preparation.

The cost and difficulty of sample labeling have highly restricted the applications of large amounts of available HR SAR data, even though the data contains rich details of objects and scenes.

Despite high resolution, lower operation cost and reduced solvent consumption, GC are less commonly used for the analysis of steroids than LC, mainly due to the difficulty of sample preparation, as derivatization should be applied in all studies with GC MS determination [25].

Furthermore, pyrazines produced by microorganisms can be found in low quantities in culture media (Beck et al. 2003; Dickschat et al. 2010; Nawrath et al. 2010), and the bottleneck of analysis has been the difficulty of sample preparation due to the high solubility and volatility of pyrazines in microbial samples.

The high ratio of NUS to NDS in the Gobiidae is probably due to (1) difficulty of sample collection, (2) lack of good morphological characteristics enabling ready species identification, and (3) lack of funding for taxonomic studies [26].

The sample size for T1D with nephropathy in the present study and also in the previous reports [ 17– 19] was relatively limited as a result of the difficulty of sample collection.

Nevertheless, their measurement is not easy on account of heterogeneity in property and difficulty of sampling.

The challenges come from compartmentation of metabolites, from dilution of tracer by endogenous pools, and from the difficulty of sampling relevant pools.

The patterns of soil moisture in arid environments are very important for the conservation and restoration of vegetation but have been rarely studied due to the difficulty of sampling in these environments.

Additionally, the difficulty of sampling in marine and freshwater environments means that a species may be well established, and may have spread from its initial site of introduction, before it is recorded.

We used a novel technique, based on semi-structured interviews with local informants, to address the difficulty of sampling relatively rare but important events, such as dispersal between fragments.