Sentence examples for ppm did not from inspiring English sources

They found that carbon dioxide at higher levels than today (400 ppm) did not significantly change plant growth, while higher temperatures had a negative effect.

Further increase in concentration (beyond 500 ppm) did not cause any remarkable change in the inhibition efficiency.

Furthermore, raising the KHI concentration from 100 ppm to 400 ppm did not lead to the expected increase in KHI performance for all the KHIs tested.

Reduction of UER water salinity below 5,000 ppm did not improve the displacement efficiency of the process but resulted in a reduction of overall oil recovery.

Other results indicate additionally that a 2.5-h exposure to CO2 up to 5000 ppm did not increase intensity of health symptoms reported by healthy young individuals and their performance of simple or moderately difficult cognitive tests and some tasks resembling office work.

In contrast, CO exposure (250 ppm) did not directly activate JNK (Figure 6A), but rather delayed the early phase of LPS-induced JNK phosphorylation in THP-1 cells (Figure 6B).

Sodium, calcium, or strontium of 2 mol ppm brings about the high temperature embrittlement based on intergranular fracture, while lithium of 4 mol ppm does not.

The densities of the water samples with deuterium contents ranging from 2 to 97 ppm do not deviate at both temperature values 4°C and 20°C.

It can be seen that, adding SDS with concentration of 400 ppm does not have a significant effect on increasing the gas consumption rate.

This shows that impurities even at small concentrations of the order of a few ppm do not only significantly effect the ion- but also the neutral-chemistry in an atmospheric pressure plasma jet.

These results disagree with the work of Rugini and his collaborators [30], which showed that concentrations of ethephon (from 0 to 2000 ppm) do not result in a significant increase in the oil content of olives of the "Giarraffa" variety.