Sentence examples for the difficulty in ascertaining from inspiring English sources

Ivory harvested prior to 1990, however, is still legal to sell, and the difficulty in ascertaining when ivory was taken allows for illegally harvested ivory to be passed off as "pre-ban".

This is likely due to the difficulty in ascertaining a suitable set of initial values to ensure proper convergence to find the best possible GLD fit, an area where SR can provide valuable guidance and input.

Given the difficulty in ascertaining the species identity of below-ground material collected from the field, BGCN and root porosity were quantified by growing the 11 species in the greenhouse under conditions designed to replicate temperature, humidity, and photoperiod at the field site.

And, notwithstanding the composite aspect of the cell-mediated immune response and the difficulty in ascertaining the relative importance of each attribute, evidence that the CTL response is in part mechanically predetermined could be significant in on-going efforts to define more palatable criteria of the immune response to assist vaccine design.

Indeed, such a wide range of inappropriate ED attendances underlines the difficulty in ascertaining their true rate.

The work environment contributes to the difficulty in ascertaining health status and their association with pesticide exposure.

Recurrence of breast cancer was also omitted because of the difficulties in ascertaining recurrence within a community setting.

This discrepancy in efficacy results between two clinical trials, conducted in two very different settings the field vs. CHMI, highlights the difficulties in ascertaining BSV efficacy in proof-of-concept studies.

This arises from the general difficulty in ascertaining the collective FG Nup behavior within the NPC in vivo, and their sensitivity to experimental design and length scale in vitro.

However, given the relative difficulty in ascertaining African American pedigrees, it is imperative that additional cooperative studies such as this be undertaken to increase our ability to localise and assess the role of prostate cancer susceptibility genes in this population.

Though it would be interesting to assess survival from disease onset and the potential impact of delay until diagnosis, we were unable to do so because of the difficulty in reliably ascertaining dates of IIM onset.