Repeated airborne infections of the bacteria acinetobacter in an intensive care ward have been eliminated by the installation of a negative air ionizer.
In the first such epidemiological study, researchers found that the infection rate fell to zero during the year long trial.
The atmosphere we breathe normally is full of positive and negative ions. Air conditioning, lack of ventilation, and long dry spells remove negative ions, which usually serve to latch onto airborne dirt particles and wrestle them to the floor, rendering the air purer. Roughly one-third of the population seems to be particularly sensitive to negative-ion depletion.
Abstract: Male and female subjects (undergraduate students) participated in two studies designed to investigate the impact of negative air ions on cognitive performance. In the first experiment, they worked on three different tasks (proofreading, memory span, word finding) in the presence of low, moderate, or high concentrations of such ions.
Negative ion generators are curious little devices–their manufacturers’ claims are inevitably followed by exclamation marks. “Is your air healthy?” asks one ad. “Recreate fresh mountain quality air indoors!” Negative ions, say manufacturers, make you feel alive, revitalized, and alert while relieving depression, headaches, and allergies. But do such claims have any scientific basis?