At many sites, isolated points with high concentration values ("spotty anomalies") were frequently observed [14].
High concentration values detected for NH4 and B appear to be related to high natural background levels.
This route enables the dispersion of pristine graphene without covalent functionalization or an additive stabilizer; such dispersions are stable against aggregation and display high concentration values.
The iodine images present with high concentration values in the aorta and no visible contrast enhancement of the liver parenchyma, as it is typical for the arterial phase.
Both thymosins β4 and β10 show high concentration values immediately after birth at 26 27 weeks (193 days of GA, in this subject Tβ4 concentration in the range 1.0 1.5 µmol/L) which constantly decrease as a function of PMA, reaching values comparable to that ones of adult (Tβ4 concentration about 0.1 µmol/L [13]) after 38 weeks (270 days) of PMA.
These high concentration values are eventually responsible for the increased expression of GFP.
MRI showed that the presence of surgical clips in the liver led to undetermined areas (black spots) surrounded by (virtual) high concentration values (Fig. 4).
This can have two explanations: first, particles at high concentration values, in the order of mg, form aggregates that could have different characteristics and behavior respect to isolated particles; second, the ability of Sioutas multistage cascade sampler that did not discriminate particles with diameters less than 0.25 μm (i.e., nanoparticles), to penetrate the nuclear pore diameter.
To account for these potential extreme day exclusions, the 24-hr values were ranked over 3 years and exclusions were permitted based on total available collected samples; for each 365 sample days, the highest concentration value was excluded.
