Sentences with phrase «peak concentration»

Peak concentrations in the blood are achieved within 30 minutes to three hours, although the presence of food in the stomach can slow the absorption.

For example, from whatever peak concentration of carbon dioxide we eventually reach in the atmosphere, it will take about a thousand years for it to decrease by half, and then another thousand years to fall by half again.

The scenarios can be grouped according to which of the four Representative Concentration Pathways (RCPs) they are most similar to, based on peak concentration of greenhouse gases.

The study showed clear seasonal cycles at both locations — with peak concentrations at Cayenne from January to May and from May to September at Guadeloupe.

It has been described that urinary excretion of SFN metabolites after consumption of fresh broccoli reaches peak concentration 3 - 6 h after consumption, but it could be delayed until 6 - 12 h (Vermeulen, et al., 2008).

The predicted 21 ppt and 14 ppt peak concentrations of MSA and H2SO4 observed, respectively, at 06:00 h and 14:00 h correspond to mass concentrations of only 0.08 μg · m − 3 and 0.06 μg · m − 3, respectively, well below current air quality standards for PM2.5.

Thus, we chose a mathematical parameterization of atmospheric GEM history from 1940 to 2006 (firn air model input)-- which allowed for the possibility of a constant level, monotonic increase or decrease, or peak concentration of GEM concentration during this timeframe, depending on the choice of parameter values.

«Since residents may be repeatedly exposed to these peak concentrations of benzene,» the ATSDR report said, «the concentrations... warrant careful monitoring and exposure evaluation.»

However, the models differ in their predictions of the peak concentration of cesium — from a low of 2 to a maximum of 27 Becquerels per cubic meter.

Feynman pioneered this kind of explanation in physics, so it is not surprising that he developed a similar theory for ant trails: randomly moving ants superpose their pheromones, and the peak concentration is along the straight - line path.

However, if we are going to peak concentrations and return to lower levels (e.g. 400ppm), we might be lucky and never find out what the real climate sensitivity is.

Animals on bid administration probably can be checked at any time, but peak concentrations can be expected at the middle of the dosing interval (4 — 6 hr) and the nadir just before the next dose.

By 2008, Rowland was warning that given humanity's apparent inaction on climate, «his best guess for the peak concentration of carbon dioxide» was a staggering «1,000 parts per million.»

For the peak concentration isn't the rate more important than the final amount?

Suppressing the contribution from anthropogenic SO2 emissions leads the domain - wide average concentrations of H2SO4 to decrease by a factor of 60 and the peak concentrations by a factor of 85 but not to zero, due to the continuing contribution from OSCs.

A rough estimate would be 0.2 * (450 - 280) or 35 ppm, where 450 is the peak concentration and 280 the stable pre-industrial level.