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Fluorine Essays and Term Papers
FlouridationIn 1931 at the University of Arizona Agricultural Experiment Station M. C.
Smith, E. M. Lantz, and H. V. Smith discovered that when given drinking water
supplied with fluorine, rats would develop tooth defects. Further testing by H.
T. Dean and E. Elove of the United States Public Health Service ...
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Fluorideis a mineral that occurs naturally in almost all foods and water
supplies. The ion comes from the element fluorine. Fluorine, the 13th
most abundant element in the earth's crust, is never encountered in its free
state in nature. It exists only in combination with other elements as a
compound. ...
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The Depletion Of Ozone LayerOzone is a natural trace component of the atmosphere. It is created continuously through the action of sunlight and oxygen in the upper atmosphere. At the same time this destroyed by various reactions with other components in the air. The next result of these natural processes is the so-called ...
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Chlorofluorocarbons (CFCs)CFCs are a family of man-made gases used for various industrial
purposes. First developed in the 1920's in the United States, CFCs have
been used in large quantaties since 1950. The industrialized countries can
account for over 80% of CFCs use. CFC-11 is used primarily as a propellant
in ...
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Chloroflourocarbonswere discovered in the 1920's by Thomas Midgley, an
organic chemist at General Motors Corporation. He was looking for inert, non-
toxic, non-flammable compounds with low boiling points that could be used as
refrigerants. He found what he was looking for in the form of two ...
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The Noble Gasesare the far right elements on the periodic table.
On the earth they are scarce so we don¹t see much of them. They are do not
react well with anything. In fact until around the 50¹s they hadn¹t found
anything that they would react with any of the gases. But then someone found
out that Fluorine ...
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Problems Caused By Air PollutionSome people think that air pollution is not harming the earth or the
people, but it is doing worse, by killing the earth and getting people sick.
"Air pollutants," according to Gay, "are known to cause respiratory diseases,
cancer, and other serious illnesses" (12). Air pollution not only ...
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Oxygenis required for the release of energy from food molecules (aerobic respiration). Instead of breaking down food molecules completely, muscle cells switch to a form of partial breakdown that does not require (anaerobic respiration) so that they can continue to generate energy. This partial ...
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The Depletion Of The Ozone LayerFrom far off in space, you can see our home surrounded by a blue
ribbon with a faint tint. The ribbon is almost transparent and is used as
a filter to protect all living organisms from the sun's hazardous radiation.
It lets just the right amount of light through to supply everything with
energy. ...
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Being Physically FitAccording to Steven Blair, More than sixty percent of American adults do not get the recommended amount of physical activity. In fact, twenty-five percent are not active at all. Nearly half of all American youths 12-21 years of age are not vigorously active on a regular basis. Moreover, ...
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The Comparative Abundance Of The Elements- There are 92 naturally occurring elements, only 17 of them make up 99.5% of
the earth's crust (including oceans and atmosphere). - In living things (plants,
animals, people) the six most abundant elements are carbon, hydrogen, oxygen,
nitrogen, phosphorus and sulfur. - The universe is ...
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Man-made CFCs Are Jeopardizing Our FutureChlorofluorocarbons (CFCs) are depleting the ozone layer which is harmful to the earth's inhabitants and environment because of the increased ultraviolet radiation coming through the thinned ozone, global warming caused by ozone loss, and the ground leveling of the ozone layer. ...
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The Noble Gasesare the far right elements on the periodic table. On the earth they are scarce so we don’t see much of them, because they do not react well with anything. In fact until around the 50’s they hadn’t found anything that they would react with any of the gases. But then someone found out that ...
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Frank J. Horgan Filtration PlantIntroduction
The is located Southeast of Toronto on
the shores of Lake Ontario (See map). Its purpose is to provide safe drinking
water to our taps by filtering the water. The water is gathered from Lake
Ontario. This plant has a production capacity of 455 million litres per day to
supply the ...
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Oxygenand its compounds play a key role in many of the important processes of
life and industry. in the biosphere is essential in the processes of
respiration and metabolism, the means by which animals derive the energy needed
to sustain life. Furthermore, is the most abundant element at the ...
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The Element: ChlorineGeneral Information
We researched the chemical element known as chlorine. Chlorine has
an atomic number of 17 and an atomic weight of 35.453. It has a
valence number of 3. The element has 3 energy levels. Chlorine exists
as a greenish-yellow gas at normal temperatures and pressures. Chlorine
is ...
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Gold 2Gold, nothing can compare to this precious metal. A symbol of wealth and prosperity, it has been a value for explorers and adventurers and a lure for conquerors. Today it is vital to commerce and finance; popular in ornamentation, and increasing importance in technology.
The nature of gold is ...
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The Positive Effects Of DDTIn the United States, the media has a tendency to report only the
negative details of everything. Such was the case in the late 1960’s and
early 1970’s when the pesticide DDT was investigated and eventually
prohibited. Most of the claims against DDT remain unproved to this day.
There were three ...
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Mineralsare required to build soft and hard body tissue. Without then
we wouldn't exist. They also help out with the nervous system the contraction of
mussels and help the blood flow properly.
are classified into 2 major groups. The major elements such as
calcium, magnesium, iron, iodine etc. Then the ...
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Pollution In Eastern EuropePollution in the world today poses one of the most dangerous threats to human kind that man has ever known. This problem occurs nearly everywhere in the world, and eastern Europe is no exception. In fact, eastern Europe has been cited as particularly bad with regard to pollution. The area, which ...
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