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» Science Essays and Papers
Breast Implants
<view this essay>.... that need to be followed in order to get an application for silicone inflatable breasts (MS Encarta). There are various test, experimentation, and evaluations that need to be done ("Student Handbook"). The most important ones are the;
Chemical Characterization, Pharmacokinetic Studies. These are all tests that the Plastic Surgery and Reconstructive Surgery Devices Branch Division of General Restorative
Devices and the Office Of Device Evaluation all require (ODE documents 6).
The Chemical Characterization, is an important test. It does all of the following. If fabrication of the device involves curing of polymeric components by chemical crosslinking, the .....
Number of words: 771 | Number of pages: 3 |
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Cloud Formations
<view this essay>.... which are called high, middle, and low altitudes. The different kinds of clouds are found in these three divisions according to the clouds' altitude.
First, we have the high clouds that range in altitude from 16,500 to 45,000 feet. In this division we have the cirrus, cirrocumulus, and cirrostratus clouds. A cirrus cloud appears in delicate, feather-like bands that are not attached to each other, and is usually white with no shading. Cirrocumulus clouds appear like very small round balls or flakes. The cirrocumulus clouds sometimes form a pattern of a buttermilk sky. The cirrostratus clouds sometimes form tangled webs or thin whitish sheets. A .....
Number of words: 510 | Number of pages: 2 |
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Hepatitis B Virus
<view this essay>.... four genes: pol, env, pre-core and X that respectively encode the viral DNA-polymerase, envelope protein, pre-core protein (which is processed to viral capsid) and protein X. The function of protein X is not clear but it may be involved in the activation of host cell genes and the development of cancer.
Hepatitis B is a serious public health problem that affects people of all ages in the United States and around the world. Each year, more than 240,000 people contract hepatitis B in the United States. A highly infectious virus that attacks the liver causes the disease. (HBV) infection can lead to severe illness, liver damage, and, in some cases, death.
It c .....
Number of words: 247 | Number of pages: 1 |
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Evolutionism
<view this essay>.... no God. The theory was sort of a dream or manifestation without any original
grounds for belief. Over time more and more people looked into evolutionism and they
developed possibilities of how it occurred. Many theories were developed, but someone always
disproved them. Recently with the discovery of genetic mutation and a new understanding of
genes and DNA, the evidence supporting evolution has greatly increased.
Charles Darwin was one scientist who helped to increase the evidence supporting
evolution. Darwin developed the idea of “natural selection” where living things that reproduced
in large numbers and survived became dominant and other liv .....
Number of words: 323 | Number of pages: 2 |
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Amyotrophic Lateral Sclerosis
<view this essay>.... no or negative. "Myo" refers to muscle, and "Trophic" means nourishment--"No muscle nourishment." When a muscle has no nourishment, it "Atrophies" or wastes away. "Lateral" identifies the areas in a person's spinal cord where portions of the nerve cells that nourish the muscles are located. As this area degenerates it leads to scarring or hardening ("Sclerosis") in the region.
Over 5,000 Americans are diagnosed with ALS each year. There is great variation in the course of the disease. Symptoms usually appear in individuals between the ages of 40-70, though the disease has been reported in both younger and older persons. Survival after the confirming diagnosi .....
Number of words: 3526 | Number of pages: 13 |
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Decomposition
<view this essay>.... in a test tube. Record the
accurate weight below. Product Weight Before Weight After Mass of Test tube +
KClO4 41.5g 39.8g Mass of Test tube 37.5g 37.5 Mass of KClO4
4.0g 2.3g 2. Set up the apparatus shown below.
3. Gently heat the test tube containing the potassium perchlorate. Gas should
begin to collect in the collection bottle. Record all observation. 4. Once the
reaction is complete, no more gas give off, allow the test tube to cool. While
the test tube is cooling test the gas in the collection bottle with glowing
splint. Caution: Do not leave the rubber tubing down in the water trough during
cooling or you will experience back-up. 5. After the .....
Number of words: 253 | Number of pages: 1 |
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Predators And Ecosystem Management
<view this essay>.... the sea otter and the kelp forests. The relation
between the sea otters and the kelp-forests was provided because of a accident
of history, the over-exploitation of sea otters in the Pacific maritime fur
trade. The study compared areas where sea otters were abundant with nearby
areas to area's where they're almost extinct. By doing this comparison of the
sea otters coastal system it was possible to gain much insight into the sea
otter ecological role in kelp-forest ecosystem. Over the years it's been
possible for us to observe the kelp-forest ecosystem over-time, thanks to the
massive growth of the sea otters population we observed the change from otter- .....
Number of words: 419 | Number of pages: 2 |
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Aluminum
<view this essay>.... Of all the structural metals
aluminum is one of the lightest with only magnesium being lighter aluminum
is very soft and not very strong when it is at it's purest state. The
strength of aluminum is increased by alloying it with other metals and
elements. Aluminum is one of the best conductors of heat and electricity,
it also reflects heat and light very well. Aluminum is fond in many Rocks
and minerals on the earth's crust. Because aluminum is not very strong and
is highly reactivate with Oxygen, water, acids, and bases it is compounded
with other metals and elements to from alloys for common uses. In Society
Aluminum Alloys are used in many w .....
Number of words: 307 | Number of pages: 2 |
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