| Researcher | Country | Area of Study | Results |
| Terman & Terman | USA | Seasonal Depression |
The severity of depressive symptoms, decreased selectively for the group receiving high-density treatment...There were no side effects attributable to the treatment, and all subjects, who responded showed subsequent relapse during withdrawal. Treatment with a high-density negative ionizer appears to act as a specific antidepressant [for seasonal depression]... |
| Krueger & Smith |
USA | Cigarette Smoke Effects of Cilia on Rabbits |
Discovered that cigarette smoke slows down the cilia and impairs their ability to clear foreign and possibly carcinogenic (cancer-inducing) substances from the lungs. Positive ions and cigarette smoke lowered the ciliary beat three to ten times faster than in normal air. Negative ions however counteracted the effects of the smoke. Dr. Krueger: "The agent in cigarette smoke that slows down the ciliary beat is not known. Negative ions raises the ciliary beat in a heavy atmosphere of cigarette smoke as they do in fresh air." |
| Minkin | Russia | Physical Performance of Humans |
After 15 minutes of daily exposure to negative ions for 25 days, significant improvements to the state of health, appetite, and sleep of male subjects were noted. After 9 days, their work capacity increased 50% and showed 87% increase by the 25th day. |
| Kornblueh | USA | Hay Fever & Asthma |
Of hundreds of patients treated, 63% experienced total or partial relief. "They come in sneezing, eyes watering, noses itching, worn out from lack of sleep and so miserable they can hardly walk. Fifteen minutes in front of a negative-ion machine and they feel so much better they don't want to leave." This relief lasted for about two hours after returning to un-ionized conditions. |
| Hansell | USA | Humans | Experiments suggested that exposure to negatively ionized air might help in reducing body weight and in overcoming insomnia. |
| Krueger | USA | Plants | Plants growing in a negative ion atmosphere show a marked increase in size and growth rate. |
| Hawkins & Barker |
England | Human Performance |
On tests with 45 humans, negative ionization gave a significant increase in performance of psycho-motor tasks. |
| Hansell | USA | Humans | Hansell observed positively-charged air made a co-worker feel physically, mentally, and emotionally depressed, whereas negatively charged air brought a physical, mental, and emotional lift. |
| Tromp | Holland | Humans | Reported that high density of positive ions produced symptoms of dryness, burning and itching of the nose, nasal obstructions, headache, dry scratching throat, dizziness, difficulty in breathing, and itching of the eyes. Further experiments showed that exposure to positive ions resulted in a rise of blood pressure, decrease of blood albumin, and increase in 17 ketosteroids. |
| Sulman | Israel | Humans | Even healthy people showed a decreased in alertness when exposed to positive ions. With high quantities of positive ions in the air, people complained of depression, irritability, insomnia and tension. While undergoing negative ion treatment 80 out of 129 reported relief from serotonin complaints of tension, migraine, swellings, palpitations, dyspepsia, asthma, flushes, vasomotorhmitis, hyperperistalsis and pollakisuna. Over a 5-year period of treating more than 500 patients, negative ionization cured 45% of hyperthyroid cases. |
| White & Froeb | USA | Cigarette Smoke | Showed a beneficial effect on nonsmokers who worked with smokers. |
| Sulman | Israel | Bacteria | After exposing bacteria of escherichia, protons, pseudomonas, klebsiella, staphylococci, steplococci, and candida to a negative ion atmosphere, germ counts were reduced by 50% within 6 hours, and 70% within 24 hours suggesting that negative ionization is a way of controlling disease. |
| Boike, et al | USSR | Humans | Reported on use of ionization to disinfect the air. This has far-reaching implications for doctors' offices, children's schools and
any other places where germs are known to spread. The Russian tests involved spraying bacterial cultures in aerosols then treating
the same air for sixty minutes with high concentration of negative ions. Boiko reported that in such a test with a culture of M. pyogenes,
the viable cell count of the bacteria was so reduced that there were no survivors at all among the cells. |