Papers on Science and Environment
The Threat Of Nuclear Energy
Words: 3057 - Pages: 12.... 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 the disaster at Chernobyl, said that within the core, steam reacts with zirconium to produce that first explosive in nature’s arsenal, hydrogen. Near-molten fuel fragments shatter nearly incandescent graphite, torching chunk .....
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Nuclear Energy
Words: 1004 - Pages: 4.... very
little weight. They are much too light to be weighed directly, but scientists
have developed methods of determining these tiny weightd by using special
labratory instruments. Hydrogen is the lightest of all atoms and carbon atoms
weigh twelve times more than the hydrogen atom. Atoms that make up one
alement are not like atoms that make up another element.
These (atoms) are not simple particles, their structure is very complexe.
They are, in fact, made up of smaller bits of matter called subatomic particles.
An atom has two parts. Those two parts are; 1)at the center is a nucleus, a
densely packed core composed of two kinds of pat .....
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Evolution
Words: 4241 - Pages: 16.... 39
CONCEPT OF ADAPTATION ..................................... 41
PUNCTUATED EQUILIBRIUM ....................................43
VALUE/LIMITATIONS: THE THEORY OF BIOLOGICAL EVOLUTION .... 45
ALTERNATE EXPLANATIONS OF BEING ........................... 47
CONCLUSIONS ............................................... 48
INTRODUCTION
Theories explaining biological evolution have been bandied about since the ancient Greeks, but it was not until the Enlightment of the 18th century that widespread acceptance and development of this theory emerged. In the mid 19th century english naturalist Charles Darwin - who has been called th .....
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No Representation Of Allocentric Space Has Been Found In The
Words: 1785 - Pages: 7.... (1991); Muller, Kubie, Bostock, Taube and Quirk (1991); and Rolls (1991).
The behaviourist theories proposed that a reward or aversive object/event will motivate a rat to move towards or away from the location along a reward gradient, and this has been shown to be the case with rats in a maze situation (O'Keefe, 1983). Indeed, this situation does not require the rat to have a concept of absolute space; it may depend on associations between cues and responses which are provided by the maze structure itself. However, O'Keefe & Nadel (1978) identified spatial behaviours which they argued would require the existence of an allocentric map .....
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Digestive Systems Of Humans, Earthworms, And Grasshoppers
Words: 1293 - Pages: 5.... the pyloric glands secrete mucus that forms a mucus lining. Also in the stomach lining, are epithelial cells and the gastric glands. The gastric glands secrete gastric juices. Hydrochloric acid is released which deactivates the salivary amylase, in turn stopping the chemical breakdown of starch into maltose. Pepsinogen, which is an inactive enzyme, will change to pepsin, an active enzyme, when mixed with hydrochloric acid. Pepsin breaks down proteins, forming chains of amino acids called polypeptides. Chyme, a mixture of churned food, mucus, and digestive enzymes, is formed and will pass through the pyloric sphincter into the small in .....
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Knee Surgery
Words: 712 - Pages: 3.... to recover. My father had orthoscopic surgery twice, and both times he was walking within a day and cycling within a week. I assumed my recovery time would be similar to his. Never in my life have I been so wrong. Due to the nature of the injury, the doctor elected to stitch my cartilage back together. Because of the intricacy of the operation, I was restricted to non-weight bearing activities for three weeks. If I wished to return to wrestling, the doctor stated that I would have to demonstrate a muscle strength in my injured knee equal to ninety percent of my good one. When informed of this requirement, I could barely bend my leg .....
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Chemistry Solution
Words: 543 - Pages: 2.... In fact, they are atoms, molecules, or ions, which is why you cannot see them. The particles in a solution are evenly disturbed, or intermingled informally on a molecular level. A small sample of one part of a solution. The particles in a solution will not separate no matter how long the solution is allowed to stand under constant conditions. In a solution, one substance is usually considered to be dissolved, or broken down in another. The substance that is dissolved is called the solute. The substance that does the dissolving is the solvent. Not every substance dissolves in every other substances. A substance that dissolves in a .....
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Cold Fusion
Words: 695 - Pages: 3.... fusion works is the Muon Theory. The muon
theory is as follows: Speeding muons knock electrons out of their orbits
around deuterium and tritium atoms. Muons replace the electrons and form a
smaller atom. This "muo-atom" the n captures another nucleus. The muon
orbits more tightly around the two captive nuclei leading them to overcome
their natural repulsion of each other and fuse. This reaction produces a
larger nucleus that almost immediately shatters, releasing energy. It also
frees the muon, which can then repeat the cycle, causing several hundred
more such fusions.
The fact that the muon is 207 times heavier than an e .....
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Ebola Virus 2
Words: 476 - Pages: 2.... and western Sudan were large resulting in 340 deaths out of the 550 cases.
The most recent outbreak is in Kikwit, Zaire. The outbreak appears to have started with a patient who had surgery in Kikwit on April 10, 1995. Members of the patient's surgical team developed symptoms similar to those of a viral hemorrhagic fever disease.
The symptoms of Ebola hemorrhagic fever begin 4 to 16 says after infection. Victims develop fever, chills, headaches, muscle aches, and loss of appetite. The patient will suffer vomiting, diarrhea, abdominal pains, soar throat, and chest pain as the virus progresses. The blood fails to clot and patients .....
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Crystals
Words: 424 - Pages: 2.... crystallization is exacting. Large—capacity evaporators are not suited to the careful control and flexible manipulation required for a successful ‘strike’, or actual crystallization, of solid sugar . For this purpose, the concentrated liquor is transferred from the evaporators to the ‘pan.’ The pan is essentially a simple vacuum evaporator in which the removal of water continues until the concentration is appropriate for crystallization. As this proceeds, juice continues to be drawn into the pan in order to maintain a supply of crystallizable sugar. The concentration of impurities increases in the syrup as sugar is withdrawn by .....
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