Enzyme purification was achieved by a combination of concentration by rotary vacuum evaporator followed by ammonium sulphate precipitation and chromatographic resolution using DEAE-cellulose column.
Thus, when pooling data from several reports, we were able to analyze for the effects of a combination of concentration and duration of exposure, expressed as the product of concentration and time (ppm work-years) (Cavalleri et al. 2000; Haber 1924; Miller et al. 2000).
We analyzed air pollution effects for overall concentrations and for a combination of background concentrations and traffic variables to identify effects of living near busy roads separately.
During Experiment 3 (choice of high- or low-PG aspen), aspen intake was not affected by PG, but intake increased when nutrients were present in aspen in a combination of low concentrations of Cu, P, K, S, crude protein, and an intermediate concentration of condensed tannins.
Pore water concentrations of pharmaceuticals throughout the uptake and depuration phases were estimated using a combination of soil concentrations in the uptake and depuration studies and the results of batch sorption experiments.
During autumn and early winter, a combination of high concentrations of dissolved oxygen in the epilimnion and of hydrogen sulfide in the hypolimnion results in a high inventory of elemental sulfur in the chemocline and hypolimnion (Figure 3).
The analysis of the means of dry biomass production (g L−1) assayed on d 10 of cultivation was influenced by a combination of the concentrations of glucose and sodium acetate in the medium, as well as by the % BBM (Fig. 1a).
Scallions were hydroponically grown in controlled environmental chambers under a combination of 3 concentrationsiofs of 400, 1200 and 4000 μmol mol−1 and 3 light intensity levels of 150, 300, 450 μmol m−2 s−1.
Surprisingly, a combination of higher concentrations of sigB3 and siOri2 (e.g. 37.5 pmol each or 12.5 pmol each) was less effective in reducing viral titers than the lower concentration of 6.25 pmol each (Figure 3A).
Consequently, indirect measurements via a combination of microenvironment concentrations and personal activity diaries represent a potentially useful alternative.
