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» Science Essays and Papers
Hereditary Colon Cancer
<view this essay>.... the genes. accounts for 21 percent of all colon cancers. Familial Adenomatous Polyposis Coli (FAP) is very rare and only accounts for one percent of all cases. If a person had FAP, they would develop hundreds or even thousands of colon polyps. These polyps are developed at a very young age, Some people have been known to be as young as 13years of age. Most colon polyps are benign but some become cancerous. Most FAP patients develop cancer by the age of 39. Another form of hereditary cancer is Hereditary Non-Polyposis (HNPCC). HNPCC accounts for five to ten percent of all cases. HNPCC develops also at a young age but not as young as FAP patients. .....
Number of words: 979 | Number of pages: 4 |
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Water Pollution
<view this essay>.... Because water can float and be carried by the wind, it can cause harm
to unsuspecting creatures hundreds of feet from where it was originally dumped.
Such waste includes bags, bottles, cups, straws, cup lids, utensils, six pack
holders, cling wrap, fishing line, bait bags, and floats.
The second highest cause of water pollution is ship waste. Ships used to
take much garbage with them on their ships and dump them. This was very common
until the government took action. They were giving sailors up to one million
dollars fines for disposing waste. Because of that, ships now carry less garbage
with them.
Animals are not the only thing being harmed .....
Number of words: 704 | Number of pages: 3 |
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Biology Heat Loss Practical Write Up
<view this essay>.... surface area of 160cm2 will have a surface area to volume ratio of:
160
---- : 1 = 1.25 : 1
200
Objects that are not the same size but have the same surface area to volume ratios loose heat at the same rate. So a flask, with a volume of 200cm3 with a surface area of 160cm2 and a surface area to volume ratio of 1.25:1, will loose heat at the same rate as a similar flask of volume 625 and a surface area of 500 which also has a surface area to volume ratio of 1.25:1. However, generally when you increase the size of an object the surface area to volume ratio decreases so in this example it is very likely that the two flasks in question are different sha .....
Number of words: 1982 | Number of pages: 8 |
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Internet Concepts
<view this essay>.... universidad u organización. Lo que distingue a una intranet de la gratuitamente accesible Internet, es que las intranets son privadas.
Confidencial
Hasta hace muy poco tiempo, las corporaciones confiaban en equipos y programas propietarios para la instalación de redes en sus computadoras, un proceso costoso y que lleva tiempo de realizar, convirtiéndose en mucho más difícil cuando las oficinas de la compañía se encuentran repartidas por todo del mundo. Incluso en las mejores condiciones, el compartir información entre programas, formatos de archivo y plataformas diferentes no es una tarea sencilla. Por medio de la misma tecnología que se aplica a Interne .....
Number of words: 2935 | Number of pages: 11 |
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The Threat Of Nuclear Energy
<view this essay>.... degrees centigrade to 4,000 degrees centigrade. The water that was in the reactor is instantly turned to steam which creates tremendous amount of pressure in the reactor core. Above the reactor core there is a 5 foot thick lead plate and above that there is a meter thick floor composed of iron, barium, serpentine, concrete, and stone. The exploding steam fires the floor up like shrapnel. The metal plate goes through the four foot thick concrete roof like butter and reaches and altitude of sixty meters. You can hear ripping, rending, wrenching, screeching, scraping, tearing sounds of a vast machine breaking apart. L. Ray Silver, a leading author who covered th .....
Number of words: 3057 | Number of pages: 12 |
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The Giant Anteater
<view this essay>.... capable of a slow gallop four weeks after birth.
How is that for spoiled? The giant anteater has a tube-shaped head and a
long, slender snout.
Giant anteaters certainly live up to their name; some grow to be
over six feet in length, with a tail of about three feet (Encarta ‘98)!
Anteaters' tongues are two feet long, and the animals can move them in and
out of their mouths up to 150 times per minute (Schupska 1). The giant
anteaters lives on the ground. It walks with its front feet turned on the
sides to protect its claws, which the animal uses to rip open ant nest
before eating. Then it flits its long tongue and literally licks up the
ants. The anteater .....
Number of words: 346 | Number of pages: 2 |
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Acid Rain
<view this essay>.... acidic. It
is caused by today's industry. When products are manufactured many chemicals are
used to create it. However because of the difficulty and cost of properly
disposing of these products they are often emitted into the atmosphere with
little or no treatment.
The term was first considered to be important about 20 years ago when
scientists in Sweden and Norway first believed that acidic rain may be causing
great ecological damage to the planet. The problem was that by the time that the
scientist found the problem it was already very large. Detecting an acid lake is
often quite difficult. A lake does not become acid over night. It happens over a
peri .....
Number of words: 1940 | Number of pages: 8 |
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Evolution Of Immunity And The Invertebrates
<view this essay>.... role, it was a fundamental mechanism of protection in the
animal kingdom. Metchnikoff's further studies showed that the host defense
system of all animals today were present millions of years before when hey were
just beginning to evolve. His studies opened up the new field of comparative
immunology. Comparative immunologists studied the immune defenses of past and
current creatures. They gained further insight into how immunity works.
The most basic requirement of an immune system is to distinguish between
one's own cells and "non-self" cells. The second job is to eliminate the non-
self cells. When a foreign object enters the body, several things happe .....
Number of words: 1152 | Number of pages: 5 |
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