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» Science Essays and Papers
Gene Therapy
<view this essay>.... William French Anderson, Michael Blaise, and Ken Culver performed the first successful on a human in 1990. They developed a protocol for treating Adenosine deaminase (ADA) deficiency, a severe combined immune deficiency, also known as the "Boy in the Bubble disease." ADA deficiency is a result of inheriting two copies of the defective ADA gene. Possession of a normal gene leads to the continuous, regular production of ADA in cells throughout the body. Without at least one properly functioning gene, children have no way of converting deoxyadenosine (a waste product) into inosine. This leads to the rapid build-up of deoxyadenosine in the system, which .....
Number of words: 3603 | Number of pages: 14 |
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A Study Of Inheritable Traits In Fruit Flies
<view this essay>.... and don’t require very much space. Drosophila melanogaster has a
life cycle of four specific stages. The first stage is the egg, which is about .
5mm long. In the 24 hours when the fly is in the egg stage, numerous cleavage
nuclei form. Next, the egg hatches to reveal the larva. During this stage,
growth and molting occur. Once growth is complete, the Drosophila enter the
pupal stage, where it develops into an adult through metamorphosis. Upon
reaching adulthood, the flies are ready to mate and produce the next generation
of Drosophila melanogaster.
During this experiment, monohybrid and dihybrid crosses were conducted
with Drosophila melanogaster. O .....
Number of words: 1423 | Number of pages: 6 |
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Nuclear Weapons And Their Hazards
<view this essay>.... that
can destroy the entire world in less then 35 minutes.
Nuclear war would produced so much smoke that rapid, substantial
temperature and rainfall decreases would occur over wide areas of the
middle Northern Hemisphere. Smaller temperature decreases might occur in
low latitudes but more importantly in these regions rainfall would probably
decreases because monsoons could not develop. Like in On The Beach, all
the radiation move towards Australia and everyone innocent people died.
A large-scale nuclear war would lessen food production over large
expanses in the Northern Hemisphere, this could occur through acute
climatic conditions which chi .....
Number of words: 821 | Number of pages: 3 |
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Into The Depths Of A Black Hole
<view this essay>.... first take a
look at the basis for the cause of a black hole. All black holes are formed
from the gravitational collapse of a star, usually having a great, massive, core.
A star is created when huge, gigantic, gas clouds bind together due to
attractive forces and form a hot core, combined from all the energy of the two
gas 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 s .....
Number of words: 1263 | Number of pages: 5 |
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Phosphorus: Chemical Reactions Of Phosphorus And Its Importance
<view this essay>.... flocculate
phosphorus. The Flocculation that happens with aluminum sulfate addition
is the formation of aluminum phosphate particles that attach themselves to
one another and become heavy and settle to the bottom of a clarifier. The
aluminum sulfate and phosphorus mixture can then be withdrawn, thereby
removing the phosphate or phosphorus from the wastewater flow.
Industrial Applications: The application of this reaction to the
industrial world consists of a set of processes to filter out the phosphate.
The setup is the following: Purpose: Restrict phosphates to aluminum
phosphates for easier disposal of phosphorus.
The first step in phosphorus r .....
Number of words: 719 | Number of pages: 3 |
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Creation Or Evolution?
<view this essay>.... new species. This process occured without the intervention of supernatural forces or dieties. Nearly all modern scientists who are not Evangelical Christians believe in evolution.
Biblical creationists are also called literal creationists, because they interpret the two Genesis accounts of creation in the Bible literally and believe that the Bible is without error. They believe that the "day" mentioned in Genesis 1 signifies a normal 24 hour day. According to this creation the universe was established in six days. Biblical creationists interpret most sedimentary rocks as products of Noah's flood. The majority believes that the earth is under 10,000 years of .....
Number of words: 685 | Number of pages: 3 |
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Genetic Variations
<view this essay>.... life to flourish.
Hawaii's state bird, the nene is in danger of extinction. Once 50,000 nenes inhabited the islands. Now there are less than 200. The sugar cane fields in Hawaii became the breeding grounds for rats. Farmers released mongooses to kill the rats. They also began to eat the nene chicks and eggs. Roy Blackshire runs a program that places captive born nenes into the wild. This program, once a success, is now causing chaos in the nene population.
A single pair of nenes were taken from the wild and bred in captivity. Later two more birds were added. The chicks were released into the wild and the program continued. Though there are several dozen nen .....
Number of words: 751 | Number of pages: 3 |
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Animal Testing
<view this essay>.... and death would save a single life, or benefit humans in any way at all. An example of this is some tens of thousands of Beagles experimented with. In Albuquerque, New Mexico, 64 Beagles were forced to inhale radioactive Strontium 90 as part of a “Fission Product Inhalation Program” which has been paid for by the U.S. Atomic Energy Commission. In this experiment 26 dogs died. One of the deaths occurred during an epileptic seizure; another from brain hemorrhage. Other dogs, before death, became feverish and anemic, lost their appetites, and had hemorrhages. The experimenters compared their results to those experiments conducted at the University of Utah and th .....
Number of words: 926 | Number of pages: 4 |
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