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» Browse Science and Environment Term Papers
Environmental Protection
Number of Words: 1958 / Number of Pages: 8
... of living creatures. This process is accelerating. Wildlife management efforts initiated during this century have been unsuccessful in stemming the tide.
Most public attention given to endangered species has focused on mammals, birds, and a few varieties of trees. Ecologists recognize a far greater threat to the much larger number of species of reptiles, fish, invertebrates, and plants that are being wiped out by human activity. In the past few decades, vast areas in several regions of the world have been cleared to make room for urban development or for food production. Modern agriculture techniques ...
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Coral
Number of Words: 1259 / Number of Pages: 5
... even tourists deplete and destroy reefs. There are many more factors which add to the destruction of the reefs, which if not stopped it will destroy all reefs.
s are animals, not plants, sunlight is the key to their survival. They need it to power the millions of microscopic algae, called zooxanthellae, that live in their tissues. The algae provides the s with food and oxygen in return for raw materials and a secure place to live. This teamwork is what allows the reef to survive in nutrient-poor tropical seas. This relationship is sensitive to such changes in the environment as cloudy waters or ex ...
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Gallium
Number of Words: 487 / Number of Pages: 2
... blende, iron pyrites, bauxite, and
germanite.
Silvery white and soft enough to be cut with a knife, gallium takes on a
bluish tinge because of superficial oxidation. Unusual for its low melting
point ( about 30 degrees C, 86 degrees F ), gallium also expands upon
solidification and supercools readily, remaining a liquid at temperatures as
low as 0 degrees C ( 32 degrees F ).
Gallium has the longest usefull liquid range of any element. The liquid
metal clings to glass and similar surfaces. The crystal structure of gallium
is orthorhombic. Natural gallium consists of a mixture of two stable isot ...
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Genetic Engineering
Number of Words: 750 / Number of Pages: 3
... as living factories for the production of pharmaceuticals and as sources of organs for transplantation into humans in the United States and abroad. Fish are being genetically engineered to grow larger and at a faster rate.
According to U.S. News and World Report, many pharmaceutical drugs, including insulin, are already genetically engineered in the laboratory. Many enzymes
used in the food industry, including rennet used in cheese production, are also available in genetically engineered form and are in widespread use.
Genetic screening is already used to screen for some hereditary conditions. Res ...
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Healthcare And Coranare Heart Disease
Number of Words: 2728 / Number of Pages: 10
... due to poor diet, smoking and a family history of the disease. Throughout the entire time his outlook remained very positive. There were several dramatic changes that the disease caused. He quit smoking after the first heart attack. On the first year after surgery many things went on like they had before the surgery. Family activities didn’t change much. The only noticeable difference was the fact that he quit smoking.
“Each year, 900,000 people in the United States have a heart attack. Of these, roughly 225,000 die, including 125,000 who die before ever getting any medical attention. ...
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PCR And Its Use
Number of Words: 773 / Number of Pages: 3
... "The cycling protocol consisted of 25-30 cycles of three-
temperatures: strand denaturation at 95degC, primer annealing at 55degC, and
primer extension at 72deg C, typically 30 seconds, 30 seconds, and 60 seconds
for the DNA Thermal Cycler and 4 seconds, 10 seconds, and 60 seconds for the
Thermal Cycler 9600, respectively."
Basically, that means that they set it to certain temperatures, then put it in
different cyles for different amounts of time. PCR machines can be compared
with washing machines. There are the different temperatures (here for example,
there is 72degC, where in the washing mach ...
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How North Carolina Is Affected By Water Pollution
Number of Words: 407 / Number of Pages: 2
... About 94% of the estuaries and sounds in North Carolina fgully support designated uses. Agriculture, urban runoff, septic tanks, and point source discharges are the leading sources of nutrients, bacteria, and low dissolved oxygen that degrade estuaries.
About half of the people in North Carolina use ground water as their primary supply of drinking water. Ground water quality is generally good. The leading source of ground water contamination is leaking underground storage tanks, which contaminate ground water with gasoline, diesel fuel, and heating oil. Comprehensive programs are under way to assess ...
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Electronic Stimulation
Number of Words: 640 / Number of Pages: 3
... is simply the application of electrical pulses to the body, whether it is for function or therapy. The classical and common example is that of the cardiac pacemaker. The range of clinical uses of electrical stimulation has and is growing wider and includes: pain relief (often known as TENS - Transcutaneous Electrical Nerve Stimulation), maintaining or increasing range of movement, muscle strengthening, facilitation of voluntary motor function, and orthotic training or substitution.
Functional Electrical Stimulation (FES) is a branch off of electrical stimulation. The term FES is applied to syst ...
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UFO's: Seeing Is Believing
Number of Words: 685 / Number of Pages: 3
... yearn for a concrete explanation
on UFO's, their beliefs on their origin contrast. Many looking for a more
scientific definition disregard UFO's as nothing more than a mere
misinterpretation of a plane, weather balloon, or meteor. Some have gone
so far as to say that specific witnesses to UFO's have seen nothing more
than a hallucination and "wanted" to see a UFO so their minds adapted that
idea into an illusion to satisfy the urge.
Personally, I have had two encounters with unexplainable objects in
the sky and to disregard them as a misinterpretation or hallucination is an
impossibility. ...
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Killer Whale, The Mighty Dolph
Number of Words: 399 / Number of Pages: 2
... harpoons sticking out of their backs. Research soon found that fishermen were shooting them to keep them from eating all of a days catch. This was not the first time something like this was found. In the 1950's The U.S. Navy used machine guns to slaughter hundreds of Killer Whales off of Iceland to protect fishing. After these animals are killed, they are usually thrown away. The meat is very bitter and is not used. Killer Whales also do not produce oil as most other whales do so there is no benefit from that area of trade either.
Killer Whales aren't actually whales, they're dolphins, the largest ...
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