Sentence examples for ppm there was from inspiring English sources

Above 25 ppm, there was no linear response of the electrodes to different concentrations.

At 4.5 ppm, there was a proton shift of the solvent.

Similar to the 5000 ppm, there was a poor matching with R 2 and MAPE values of −7.4849 and 15.5% for RSM and −18.98 and 19.28% for ANFIS being achieved.

At 50 or 25 ppm, there was no maternal, embryo or fetal toxicity (including malformations) in rats.

In relation to AS compared to AF when added at 50 ppm there was no difference (P > 0.05) between species when H2O2 was added as aggressor factor.

The Cochran-Armitage trend test for binomial data showed that overall as the dose of auraptene was increased to 500 ppm there was a significant decrease in tumor incidence (p < 0.05).

At almost 400 parts per million (ppm), there is now 40percentt more carbon dioxide in the atmosphere than before the industrial era began.

It has been reported that, 12 workers exposed for two or more years to an estimated mean acetic acid airborne concentration of 51 ppm, there were symptoms of conjunctive irritation, upper respiratory tract irritation, and hyperkeratotic dermatitis.

At 0.04 ppm there were no remarkable changes throughout the entire exposure period.

At 30 ppm there were extensive necrosis and erosion of the respiratory and olfactory epithelium in the nasal cavity.

The effect of benzene exposure on metabolite production becomes increasingly apparent at air concentrations > 1 ppm, and at levels > 100 ppm there is evidence that metabolite levels are approaching a plateau.