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Alzheimers Disease

... for reasoning and memory. The cells were bunched up like a rope tied in knots. He termed the strange nerve bundles neurofibrillary tangles. He also noted an unexpected accumulation of cellular debris around the affected nerves, which he termed senile plaques. In a medical journal article published in 1905, Alzheimer speculated that the nerve tangles and plaques were responsible for the women’s dementia. Alzheimer’s disease is a disorder marked by a gradual decline in brain function that gets worse with time. It used to be ass ...

Number of words: 1507 | Number of pages: 6

Mosquitoes

... in the hundreds at the surface of the water. Most eggs hatch within 48 hours. The larvae swim in the water and use siphon tubes to breath while floating near the water surface. After feeding on micro-organisms and growing larger, they shed their skin four times and evolve into the pupa stage. The pupa stage of development is a time when the young mosquito does not feed. After about two days the pupa evolves into an adult mosquito. The new adult mosquito escapes from the pupae skin be splitting the skin open and resting at the water surface ...

Number of words: 316 | Number of pages: 2

Desktop Videoconferencing

... (ISDN) technology and individual PCs, people can meet "face-to-face" without leaving their offices. It's a unique way to reduce costly and time-consuming travel. It also allows employees to meet "face-to-face" over a desktop PC and share and review documents with colleagues, clients or vendors. You can hold a Desktop Videoconference whenever the need arises, without the time and expense of traveling-or even leaving your desk because it's just like being there in person. in no way takes the place of face to face, but it does offer the ...

Number of words: 3016 | Number of pages: 11

Global Warming

... gases as a key tenet of the treaty. The president's position is based on the idea that is real and that it is caused by human activity. Further, it presupposes that the potential damage caused by would greatly outweigh the damage caused to the economy by severely restricting energy use. Finally, his position assumes that the agreement will significantly reduce greenhouse gas emissions worldwide and will prevent . Science Is occurring? - According to Accu-Weather, the world's leading commercial forecaster, "Global air temperatures as mea ...

Number of words: 699 | Number of pages: 3

Estuaries

... When viewing an estuary from the air on is practically amazed by dramatic river bends as freshwater finds its way back to the sea. The vast expanse of marsh grasses or mudflats extend into calm waters that then follow the curve of an expansive barrier beach. Wherever there are estuaries, there is a unique beauty. As rivers meet the sea, both ocean and land contribute to an ecosystem of specialized plants and animals. At high tide, seawater changes estuaries, submerging the plants and flooding creeks, marshes, panes, mudflats or mangrove ...

Number of words: 1264 | Number of pages: 5

Anti-Matter

... than a pull. If this were so, the antiproton's negative mass/energy would cancel the proton's when they met and nothing would remain; in reality, two extremely high-energy gamma photons are produced. Today's theories of the universe say that there is no such thing as a negative mass. The second and more subtle mistake is the idea that anti-water would only annihilate with ordinary water, and could safety be kept in (say) an iron container. This is not so: it is the subatomic particles that react so destructively, and their arrangemen ...

Number of words: 1209 | Number of pages: 5

Dangers Of Steriods

... steroids contribute to a muscular body, usage should remain illegal because they physically deteriorate and mentally destroy the body. Many people are fascinated about steroids because of their ability to build up the body. Whether taken by injection or the pill it increases strength and endurance. Steroids also help in the healing process of muscular tissue by first injuring them, then the muscles heal quicker adding more fiber increasing their bulk. Many athletes turn to steroids more often because they're cheaper th ...

Number of words: 445 | Number of pages: 2

Quantum Computing

... almost unknown outside the scientific community. Now books with ‘quantum' in the title are absurdly numerous. The reason for this recent surge in interest can be traced to the truly strange nature of quantum mechanical ideas. Quantum physics amounts to much more than a theory of atomic and subatomic processes, it represents nothing less than a complete transformation of our world view. "Its [quantum physics] implications for the nature of reality and the relationship between observer and observed are both subtle and profound. (Barenco)" ...

Number of words: 2038 | Number of pages: 8

The Human Brain

... just send messages from the brain to the organs, but also send messages from the eyes, ears, skin and other organs back to your brain. Some nerves are linked directly to the brain. Others have to reach the brain through a sort of power line down the back, called the spinal cord. The brain and spinal cord make up the central nervous system. The brain doesn't just control your organs, but also can think and remember. That part of the brain is called the mind. PROTECTING THE BRAIN Twenty-eight bones make up th ...

Number of words: 2092 | Number of pages: 8

Protein Synthesis

... unzipped by an enzyme called polymerase. From one of these single strands of a DNA molecule, a mRNA molecule is built. This is accomplished by an enzyme which travels along a portion of DNA between two exons and attaches the opposing base pairs to the backbone of the mRNA (a structure composed of phosphates and ribose). The nitrogen bases of this new molecule are identical to that of the opposite side of the original DNA molecule except that the thymine has been replaced with uracil. The formation of this molecule allows for the construction ...

Number of words: 241 | Number of pages: 1

Lab: Determining What Type Of Stimulus Info Is More Easily Remembered

... when meaningful stimulus is used and the speed of responding to the stimuli is faster when a meaningful CVC is used, rather than in random fashion. Introduction Remembering is the retrieval of information, which is stored in memory. The act of remembering takes place when a correct response is given to a certain stimuli presented. Forgetting is a weakening of this stimulus- response relationship. The Purpose of this experiment is to determine what type of stimulus information is more easily remembe ...

Number of words: 1489 | Number of pages: 6

Genetic Variations

... be possible. The ability to change is needed for 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 f ...

Number of words: 751 | Number of pages: 3

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