The mechanism of action of probiotics (e.g., having an impact on the intestinal microbiota or enhancing immune function) was dropped from the definition to encompass health effects due to novel mechanisms and to allow application of the term before the mechanism is confirmed.
Noun. 1. electronegativity - (chemistry) the tendency of an atom or radical to attract electrons in the formation of an ionic bond. negativity.
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. 2. a) In both cases, the bonding electrons are in the 2-level and screened from the nucleus by the 1s. electrons. But oxygen has 8 protons in the nucleus whereas nitrogen only has 7. A bonding pair.