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Moissan's fluorine cell, from his 1887 publication. Fluorine is a relatively new element in human applications. In ancient times, only minor uses of fluorine-containing minerals existed. The industrial use of fluorite, fluorine's source mineral, was first described by early scientist Georgius Agricola in the 16th century, in the context of ...
1909 photograph by Frederick McKay of Greene Vardiman Black (left) and Isaac Burton and F.Y. Wilson, studying the Colorado Brown Stain [8]. Community water fluoridation in the United States is partly due to the research of Dr. Frederick McKay, who pressed the dental community for an investigation into what was then known as "Colorado Brown Stain."
The history of water fluoridation can be divided into three periods. The first ( c. 1801–1933 ) was research into the cause of a form of mottled tooth enamel called the Colorado brown stain. The second ( c. 1933 –1945) focused on the relationship between fluoride concentrations, fluorosis, and tooth decay, and established that moderate ...
During the 1950s and 1960s, conspiracy theorists baselessly claimed that fluoridation was a communist plot to undermine American public health. [11] In recent years, water fluoridation has become a prevalent health and political issue in many countries, resulting in some countries and communities discontinuing its use while it has expanded in ...
Robert F. Kennedy Jr. has called for water systems in the U.S. to remove fluoride, sparking controversy over the risks and benefits of fluoride in drinking water, as new research shows that ...
Fluorine is a chemical element; it has symbol F and atomic number 9. It is the lightest halogen [note 1] and exists at standard conditions as pale yellow diatomic gas. Fluorine is extremely reactive as it reacts with all other elements except for the light inert gases. It is highly toxic.
Califf said at an event Tuesday that while experts are not always right, they should not be broadly ignored: “Not having experts," warned Califf, "I think historically, in every society, has ...
The letter “Q” doesn’t appear in any American state’s name. Walt Disney currently holds the most Academy Awards at a lifetime total of 26. Interesting facts