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» Browse Science and Environment Term Papers
The Aging Process
Number of Words: 1487 / Number of Pages: 6
... account for much of the disability attributed to aging. As these diseases are conquered, far more people will live to their full potential life span and remain active and healthy for life.
A lot is known about the diseases that affect people and cause death. Much less is known about real aging because it involves fundamental cell processes that are quite complex. However, this mystery of life is being unraveled and will offer opportunities in the future that were once considered to be only possible in science fiction. It is hard to improve on the advice given by Seneca (4 B.C. -65 A.D.) to eat mo ...
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The Tragic Challenger Explosion
Number of Words: 2883 / Number of Pages: 11
... that died on the Challenger? Sharon Christa
Corrigan McAuliffe, born in 1948, was the famous winner of the teacher-in-space
program, was a high school teacher at Concord, N. H., a wife, and a mother of
two children. She touched the lives of all those she knew and taught. As a
school official in Concord said after her death, "To us, she seemed average.
But she turned out to be remarkable. She handled success so beautifully." She
also wanted everyone to learn more, including herself. Demonstrating her
aspirations after entering the space program, she is quoted saying, "What are we
doing he ...
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Anabolic Steroids Just The Facts
Number of Words: 1750 / Number of Pages: 7
... are directly related to the inherent need that man has to exert dominance over other males. This can also be verbally, intellectually, physically, and aesthetically. In our society we have always praised the athletes that achieve the most amazing physical feats or that have achieved cosmetic perfection. Lets face it, having large muscles enhances confidence, strength, and physical attraction from the opposite sex which can lead to positive popularity. Being extra strong can also dramatically aid an individuals performance in most sports. A person that is in shape usually portrays a sense of control a ...
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The Keys To Unlocking Transitions In Water
Number of Words: 419 / Number of Pages: 2
... the
surface, resulting in a salinity gradient. Tides force seawater inland as a
countercurrent and produce a saltwater wedge below the freshwater surface waters
(Bellamy 62).
Estuaries are always in a state of change and hardly ever in a steady
state. The principal energy source are tides, causing estuarine mixing, but wind,
wave motions, and river runoff can also be important locally (Braun 45). Salt
water and fresh water mix to form brackish water. The three main estuarine ones—
saltwater, brackish, and freshwater—can shift seasonally and vary greatly from
one area to another because of changes in ...
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Digestive System
Number of Words: 1451 / Number of Pages: 6
... saliva, which is secreted in the mouth. Saliva moistens the food so it can be swallowed easily. It also changes some starches into simple sugars.
It is important to chew food thoroughly to mix it well with saliva. Thorough chewing cuts food into small pieces that are more easily attacked by digestive juices. Food should not be washed down with quantities of liquid to avoid chewing.
From the mouth the food is swallowed into a transport tube, named the esophagus, or gullet. A flap called the epiglottis closes the windpipe while food is being swallowed. Peristalsis, a wavelike muscular movement ...
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Depression 6
Number of Words: 963 / Number of Pages: 4
... long-term depression that can go on for years. Some people have had it most of their lives. Long term, low-grade depression is also known as dysthymia. Dys, meaning disorder, and thymia meaning mood. Dysthmia is then a disorder of ones mood. The last type is manic depression. The lows of this depression can alter with days or weeks of maniaextreme feelings, unreasonable thoughts, and inappropriate, sometimes destructive behavior. The manic-depressive person fluctuates from one emotional pole to another, often in rapid swings. 3
There are many symptoms of depression. Symptoms can include per ...
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Acetylation Of Ferrocene
Number of Words: 1603 / Number of Pages: 6
... product.
Both TLC and CG are excellent methods of measuring the presence of a
given substance. Both methods turn around a compounds polarity. As one recalls,
polarity is a measure of the electronegativity of a compound determined by their
placement in the periodic chart. Specifically, in this lab we are talking about
the difference in polarity between the atoms of oxygen and carbon. Ferrocene is
relatively low to none in polarity. Acetylferrocene, because of the carbonyl
functional group, is more polar than the ferrocene. Moreover, diacetylferrocene,
because of the 2:1 ratio of the carbonyl gr ...
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Biomechanics
Number of Words: 617 / Number of Pages: 3
... go through two main phases, the analysis of a jogger wearing a standard walking prosthesis and computer simulation of the flexing of the knee on this walking prosthesis. They had to measure rotation, weight bearing, moments, and the stress of the joints acting on this limb. After the mechanical actions were mapped out they had to use many mathematical equations to spring force and spring stiffness. All of this was accomplished and the conclusion was that by varying the placement and orientation of the spring, the moment arm values could be adjusted in an attempt to linearize the spring stiffness. ...
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Cystic Fibrosis
Number of Words: 1879 / Number of Pages: 7
... with doctors for new medical advancements. More and More discoveries are made every day and one of them very well might be able to help you situation.
You cannot catch from someone who has it. It is not a contagious disease, cut a hereditary or inherited one. A child but be born with it to have the disease. The symptoms usually begin at an early age, but they last throughout an entire lifetime.
The problems in CF start with thick, sticky mucus in the lungs and digestive systems. This mucus replaces healthy tissue with fibrous scars and fluid-filed cavities called cysts. Mucus builds up and clog ...
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The MOBOT Project: Longwood
Number of Words: 594 / Number of Pages: 3
... purely electrical one.
And after some deep thought, we all agreed that the mechanical way would be the
simplest to build and the most merciful on our pocketbooks. Even though we were
coming up with some good ideas, each design seemed to contain some major
problems. One of the reoccurring problems dealt with the synchronization of the
driver motor and the steering system. Finally the team came up with a design
that allowed the drive and steering controls to be independent of one another,
but still allowing each one to be linked in time. This design has now become
what is known as LONGWOOD.
The ...
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