Throughout the 19th and early 20th centuries fluorine was generally considered to be a poison. Scientif articles dealt with its toxic properties when used in preservatives and pesticides, and with the ill-effects of extremely high concentrations of fluoride in drinking water and in industrial processing. About 1942 the beneficial effects of optimum concentrations of fluorine became apparent. It was found that certain communities had water supplies which contained fluorine at a level which tended to reduce dental caries. As a public health procedure other communities began to fluorinate their water to a level which was cansidered optimum for the reduction of dental caries. This level was generally found to be one part per million of fluorine. [...]
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.116715 |
| Date | January 1964 |
| Creators | Triandafillou, Joan Margaret. |
| Contributors | Lloyd, L. E. (Supervisor), Donefer, E. |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science. (Department of Animal Science.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
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