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  1. NLM Digital Collections - British guideline on the management of asthma : a national clinical guideline 
    Publication: Edinburgh, Scotland : Scottish Intercollegiate Guidelines Network (SIGN), September 2016
    resource.nlm.nih.gov/101714879
    ... asthma. A Cochrane review of five studies using negative ion generators and one with a positive 1++ ion generator ...
  2. NLM Digital Collections - British guideline on the management of asthma : a national clinical guideline 
    Publication: Edinburgh, Scotland : Scottish Intercollegiate Guidelines Network (SIGN), July 2019
    resource.nlm.nih.gov/101772271
    ... A Cochrane review of six studies, five using negative ion generators and one with a positive ion generator, found ...
  3. NLM Digital Collections - British guideline on the management of asthma : a national clinical guideline 
    Publication: Edinburgh, Scotland : Scottish Intercollegiate Guidelines Network (SIGN), October 2014
    resource.nlm.nih.gov/101671134
    ... asthma. A Cochrane review of five studies using negative ion generators and one with a positive 1++ ion generator ...
  4. NLM Digital Collections - "Preliminary Report and Forecast and Solar Geographical Activity" [Weekly], 1978 
    https://resource.nlm.nih.gov/101084435X304
    ... of ions through the air, positive ions downward, negative ions upward. In this global electrical circuit, unlike one that someone might set up to do some practical work, most of the resistance is in the generator. Upward of a million ohms (90 percent of ...
  5. NLM Digital Collections - Text book (Volume 1) 
    Publication: St. Louis, Missouri : U.S. Army Medical Supply Services School, 1943-1944
    resource.nlm.nih.gov/14220980RX1
    ... negative charge by the loss or acquisition of negative electrons results in ... MOTOR GENERATOR A transforming device consisting of a motor mechanically ...
  6. NLM Digital Collections - Practical electrotherapeutics and diathermy 
    Publication: New York : The Macmillan Company, 1924
    resource.nlm.nih.gov/33530960R
    ... and the plate of tin connected with the negative pole. This arrange- ment gives a ... of the generator, whether this be cells, accumulator, or a reducer ...
  7. NLM Digital Collections - Manual of chemistry : a guide to lectures and laboratory work for beginners in chemistry : a .... 
    Publication: Philadelphia : Lea & Febiger, 1923
    resource.nlm.nih.gov/04520360R
    ... equals the sum of the charges of the negative ions. The two kinds of ions are in electrical ... positive ions to one electrode, and of all negative ions to the other. When the ions come in ...
  8. NLM Digital Collections - Handbook of radioactivity and tracer methodology 
    Publication: Dayton, Ohio : United States Air Force, Air Material Command, 13 February 1948
    resource.nlm.nih.gov/1275001R
    ... gas ions. The presence of appreciable quantities of negative ion-forming gases such as Og, HgO, and the ... desirable operating characteristics. The slow collection time of negative ions compared to electrons tends to pro- long the ...
  9. NLM Digital Collections - Dictionary of German scientific terms 
    Publication: Washington, D.C. : Military Intelligence Division, War Department, 1945
    resource.nlm.nih.gov/04010730R
    ... valence bonds connect- ing the positive and the negative ions of the molecule. E.g., for HQ the ... certain con- ditions. Anion: anion. One of the negative ions moving toward the anode in an electrolytic cell ...
  10. NLM Digital Collections - A bibliographical sourcebook of compressed air, diving, and submarine medicine (Volume 3) 
    Publication: Washington, D.C. : Research Division, Project X-427, Bureau of Medicine and Surgery, Navy Department, 1948-1966
    resource.nlm.nih.gov/59820860RX3
    ... demonstrated that when administered in unmodified humid air, negative ions increase the ciliary rate by about 200 beats ... 1957, carried out experiments to deter- mine whether negative ions were beneficial in certain cases of hay fever ...
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