Dmitri Mendeleev published a periodic table of the chemical elements in 1869 based on properties that appeared with some regularity as he laid out the elements from lightest to heaviest.
The predicted no-effect concentration is the concentration of a chemical which marks the limit at which below no adverse effects of exposure in an ecosystem are measured.
This article outlines the predicted impact of Brexit, the withdrawal of the United Kingdom from the European Union and the European Atomic Energy Community (EAEC or Euratom).