Sentence examples for be present at levels from inspiring English sources

Some of those intentional chemical additives in plastics with toxic and endocrine disrupting properties might be present at levels of 1000 500,000 mg/kg (ppm).

However, 241Am (τ = 432 years), also a product of man-made nuclear reactions, and a daughter product of 241Pu, was not detected in the STPs, but may be present at levels below the sensitivity of the method.

In the assessment of mixtures, a common issue is how to address the impact of substances which may be present at levels below the LOD of the analytical techniques used in the survey (non-detects or NDs).

However, under normal conditions, RH2 and RH3 proteins may not be present at levels high enough to have such an obvious effect.

Furthermore, pro-caspases are thought to be present at levels that, once they become matured and activated, are sufficient for apoptosis induction.

Since each cycle theoretically results in a doubling of PCR product, 5αR1 mRNA appears to be present at levels in the range of about 250 1000 fold higher than the 5αR2 mRNA.

In the tainted bottles of Coke, these residues were present at levels of between five and seventeen parts per billion.

The major impurity, residual soda, is present at levels of 0.2 to 0.6 percent.

The study found that millions of Indians in cities and villages were exposed to at least 45 dangerous chemicals, including 13 carcinogens, some of which were present at levels 32,000 times higher than globally accepted standards.

Acknowledging the testing performed for Deutsche Bank, the corporation said in the environmental statement that it had been "advised that such testing was not sufficient to determine whether any of such contaminants were present at levels that would render them hazardous".

"The quinones are present, and they are present at levels that could have effects on DNA".