The mean concentration determined by the tips was comparable to that found by HPLC, but the tip method delivered its results in less than 40% of the time and with the potential for further, substantial time-savings possible by using higher capacity robots.
By far the highest PCB concentrations were determined for eels from the Rur (mean concentrations of 1,630 ng/g).
Extraction of AZD3409 ester and AZD3409 acid from plasma is performed after reduction with dithiothreitol, which means that the concentrations determined may have existed in plasma as a complex mixture of disulphides.
All results presented here are the arithmetic mean of the concentrations determined in triplicate experiments.
Mean brevetoxin 3 concentrations, determined by liquid chromatography mass spectrometry (LC-MS) analysis of aerosol filter extracts for the low- and high-level groups, were 37 and 237 μg/m, respectively.
The significance of differences between mean concentrations was determined using the unpaired Student t test for analysis between groups.
For the highly concentrated and surfactant free suspensions, namely Ag, TiO2, and CeO2, the concentrations determined by means of the two approaches were comparable with each other, whereas in case of the less-concentrated ZnO and Au ENP suspensions, which are stabilized in sodium citrate solution, remarkable differences were found.
All values are mean residue ellipticity, with relative peptide concentrations determined by simultaneously monitoring actual peptide bond absorbance during CD scanning.
It can mean concentration.
In order to avoid false positive differences between the means of concentration determined under different experimental conditions, a Tukey adjustment for paired comparison was used [27].
