Sentences with phrase «concentrations in a large sample»
The study is the first to analyse the association between sleep duration and serum micronutrient concentrations in a large sample, and it found a link between high serum copper concentration and long sleep duration.
https://www.sciencedaily.com/ Not exact matches
A new peer - reviewed study discredits findings of controversial research claiming that higher concentrations of dissolved methane in domestic water wells can be associated with proximity to nearby gas - producing wells in northeastern Pennsylvania — and it does so using a much larger sampling size and pre-drill baselines.
«Not a single paper in a large sample of peer - reviewed scientific journals between 1993 and 2003 refuted the consensus position, summarized by the National Academy of Sciences, that «most of the observed warming of the last 50 years is likely to have been due to the increase in greenhouse gas concentrations.
PPM stands for «parts per million,» which is a way of expressing the concentration of one component in the larger sample.