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» Browse Science and Environment Term Papers
Preserve The Forests
Number of Words: 529 / Number of Pages: 2
... If the old growth forests are gone, then they can never return because it
takes over five generations to produce one and at the rate that the human
population is increasing, there is not enough land to have a secure place for a
new forest.
If we realize that it is best for the human race to stop destroying the
natural resources, then we must destroy, too, the existence of loggers all
together. To do so, there must not be any new loggers, so all training
potential loggers must be stopped. The current loggers must be diverted to
another occupation. Perhaps if the public supported the notion of sto ...
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Fetal Alcohol Syndrome
Number of Words: 589 / Number of Pages: 3
... and
3. damage to the central nervous system.
Diagnosis can be difficult because many of the critical diagnostic features change with age. It is most difficult to diagnose in newborns and adults. Reaching an FAE diagnosis is even more difficult because only some of the symptoms are present, and possibly not as visible. This disorder cannot be detected by genetic testing because the damage is done after the baby is born.
It is not known how much a pregnant woman can safely drink without damaging the fetus, although heavier drinking increases the likelihood of damage. Also, there does not seem ...
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Endosymbiosis
Number of Words: 2101 / Number of Pages: 8
... laughter or crying causes muscles in the upper eyelid to squeeze the lachrymal gland. This produces tears that flow too fast to be drained away. The eyelashes catch many flying particles that otherwise would enter the eye. As further protection, the eyelids automatically close when an object suddenly moves close to the eye.
The eye is made of 3 coats, or tunics. The outermost coat consists of the cornea and the sclera. The middle coat contains the main blood supply to the eye and consists of the choroid, the ciliary body, and the Iris. The innermost layer is the retina.
The Sclera, or the ...
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Dna 2
Number of Words: 1906 / Number of Pages: 7
... of human insulin's biosynthetic precursor, human proinsulin. The genetic coding for human proinsulin is inserted into the special E. coli bacteria which are then grown in a fermentation process to produce human proinsulin. With genetic engineering, new proteins are synthesized. They can be introduced into plants or animal genomes, producing a new type of disease resistant plants, capable of living in inhospitable environments. When introduced into bacteria, these proteins have also produced new antibiotics and useful drugs. Techniques of cloning generate large quantities of pure human proteins, ...
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Bacillus Anthracis 2
Number of Words: 306 / Number of Pages: 2
... however. The vaccine for both animals and humans is composed of sublethal amounts of toxin that induce formation of protective antibody. Frequent boosters are necessary to maintain resistance to Anthrax. Bacillus Anthracis spores also may live in soil for years. The only way to destroy the spores is by steam sterilization or burning. There has been no evidence of person to person transmission of the disease, though Anthrax was a subject of great concern for the military in the Gulf War. Many believed that the Iraqi armies held canisters of the Anthrax bacterium that they could use against their en ...
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Buoyant Forces
Number of Words: 281 / Number of Pages: 2
... was .98
newtons. Then next step was to measure the apparent weight of the cylinder when
it is completely submerged in a bath of water using the formula Wa=ma*g , this
was found to be 88.5grams. Knowing these two numbers, the bouyant force that
the water places on the object can be calculated using the formula Fb=W-Wa ,
Wa=.8673n W=.98n Fb=.1127n
Part 2 of this lab consisted of weighing an empty cup, which was 44grams.
And then filling another cup up to a certain point the if any more water was
added, it would spill out of a little opening in the cup, the water spilled out
could be caught in the ...
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CHEMICAL REACTIONS
Number of Words: 874 / Number of Pages: 4
... reaction combustion of oxygen. He said that combustion was a chemical reaction involving oxygen and another combustible substance, such as wood.
John Dalton, in the early Nineteenth Century, discovered the atom. It gave way to the idea that a chemical reaction was actually the rearrangement of groups of atoms called molecules. Dalton also said that the appearance and disappearance of properties meant that the atomic composition gave the appearance of different properties. He also came up with idea that a molecule of one substance is exactly the same as any other molecule of the same substance. ...
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Black Holes
Number of Words: 1294 / Number of Pages: 5
... clouds. This energy produced is so great when it first collides, that a nuclear reaction occurs and the gases within the star start to burn continuously. The Hydrogen gas is usually the first type of gas consumed in a star and then other gas elements such as Carbon, Oxygen, and Helium are consumed.
This chain reaction fuels the star for millions or billions of years depending upon the amount of gases there are. The star manages to avoid collapsing at this point because of the equilibrium achieved by itself. The gravitational pull from the core of the star is equal to the gravitational pull of th ...
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Computer Mediated Evnvironments
Number of Words: 5150 / Number of Pages: 19
... America Online (AOL), Prodigy, and Compuserve, where consumers are able to check airline flight schedules and make reservations, purchase a wide variety of products, and discuss product performance with other consumers, are becoming very popular. Households in Chicago and San Francisco can purchase groceries from home using computer software marketed by Peapod, Inc. This latter service allows consumers to search within a product category using attributes such as price, calories, sugar content, and package size. Car manufacturers such as BMW regularly mail CD-ROMs to potential customers with video sh ...
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Fluoride
Number of Words: 1173 / Number of Pages: 5
... been widely utilized in this country since 1945. It does not
involve adding anything to the water that is not already there, since virtually
all sources of drinking water in the United States contain some fluoride.
Fluoridation is a form of nutritional supplementation that is not unlike the
addition of vitamins to milk, breads and fruit drinks; iodine to table salt; and
both vitamins and minerals to breakfast cereals, grains and pastas. The
protection of fluoridation reaches community members in their homes, at work and
at school -- simply by drinking the water. The only requirements for the
impleme ...
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