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4,611 Essays on Science. Documents 241 - 270

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  • Alternative Energy Resources

    Alternative Energy Resources

    The energy that is used today comes from fossil fuels, which is a nonrenewable limited resource that will eventually be used up. Alternative energy sources such as solar, hydroelectric, geothermal and wind energies can be used, to conserve the planets limited natural resources. Alternative energy is the use of another energy without the burning of fossil fuels and break up on atoms. Solar energy can be used to operate cars and provide electricity for homes

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    Essay Length: 1,106 Words / 5 Pages
    Submitted: November 23, 2009 By: Mike
  • Alternative Energy Resources

    Alternative Energy Resources

    The energy that is used today comes from fossil fuels, which is a nonrenewable limited resource that will eventually be used up. Alternative energy sources such as solar, hydroelectric, geothermal and wind energies can be used, to conserve the planets limited natural resources. Alternative energy is the use of another energy without the burning of fossil fuels and break up on atoms. Solar energy can be used to operate cars and provide electricity for homes

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    Essay Length: 1,106 Words / 5 Pages
    Submitted: May 21, 2010 By: Yan
  • Alternative Energy Sources

    Alternative Energy Sources

    Saving Our Home The environment becomes more of a concern with every passing day. This is due to humanity’s selfishness and lack of interest for the wellbeing of our environment. Rachel Carson states in her essay “The Obligation to Endure”, “The most alarming of all man’s assaults on the environment is the contamination of the air, earth, rivers, and sea with dangerous and even lethal materials”(Carson 750). Total eradication of pollution and harm to Earth

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    Essay Length: 1,363 Words / 6 Pages
    Submitted: December 23, 2009 By: David
  • Alternative Forms of Generating Electrical Energy: Wind, Solar and Fuel Cell Power

    Alternative Forms of Generating Electrical Energy: Wind, Solar and Fuel Cell Power

    The societal demands for electrical energy have drastically increased in the past number of years. The sharp escalation of fuel consumption caused the demand for fossil fuels, which generate electrical energy, to increase as well. Almost 80% of domestic electricity use is used for space and water heating. To reduce the amount of energy produced by fossil fuels, the amount of electricity used must be lessened, and other renewable methods of electrical energy generation must

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    Essay Length: 2,500 Words / 10 Pages
    Submitted: December 12, 2009 By: regina
  • Alternative Fuel

    Alternative Fuel

    Alternative Cars As gas prices increased past $3 a gallon, hybrids became vehicles Americans were attracted too. These fuel efficient vehicles could go anywhere between 45 to 60 miles per gallon. The top leader in hybrid innovation is Toyota. Toyota has continued to produce top quality hybrids, like the Prius, and has ЎҐpledged to create a hybrid version of all of its available models by 2010Ў¦ (Walker). Federal government has granted tax credits to taxpayer

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    Essay Length: 1,072 Words / 5 Pages
    Submitted: November 12, 2009 By: Jessica
  • Alternative Fuel Vehicles Comparison

    Alternative Fuel Vehicles Comparison

    Alternative Fuel Vehicles comparison Electric Early automobiles were electric, having electric motors powered by batteries. But their range was limited, and internal combustion engines were more powerful, at a time when there were not concerns about the supply of fuel, or the emissions. But, the recent focus on air quality and the advances in the battery technology have made the electric vehicle a viable alternative. Electric drive systems are virtually pollution free, (in fact, they

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    Essay Length: 743 Words / 3 Pages
    Submitted: June 3, 2010 By: Kevin
  • Alternative Fuels

    Alternative Fuels

    The increase in oil prices, depleting fossil fuel deposits and ominous signs of global warming, have caused people to start to care about what fuels the things they use everyday. Some people are turning to alternative fuels that were dismissed as unnecessary when they were thought up. Ethanol and methanol are very popular options and some vehicles already run on used French-fry oil in modified diesel engines. Most fleets of delivery vans and taxis run

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    Essay Length: 970 Words / 4 Pages
    Submitted: January 25, 2010 By: Jack
  • Alternative Fuels

    Alternative Fuels

    Name Teacher Class Date Alternative Fuels Today’s environment is polluted with many carbon and other pollutions harmful to humans and the environment. Many of these pollutions are mostly from transportation vehicles. More dangers are rising, causing global warming and health risks to be increased at a higher probability of it occurring. With gasoline becoming scarce and an abundant amount of pollution in the environment, transportation companies need to enforce and search for better ways that

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    Essay Length: 304 Words / 2 Pages
    Submitted: January 27, 2010 By: Andrew
  • Alternative Medicine Is on the Rise

    Alternative Medicine Is on the Rise

    ENG120 Advanced Composition February 28, 2008 Alternative Medicine is on the Rise If you knew my mother, you might think that she was a little crazy. She is always swallowing an assortment of pills or dropping some type of solution under her tongue. All I know is this alternative medicine makes her feel better, whether it really works or not. In 1993, my mother heard through a co-worker about this chiropractor who did some interesting

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    Essay Length: 2,203 Words / 9 Pages
    Submitted: November 14, 2009 By: Mike
  • Alternative Popular Culture

    Alternative Popular Culture

    Alternative Popular Culture Alternative popular culture is basically the opposite of everything that is popular. Simply put, it is those elements outside the effective dominant culture are described as either alternative or oppositional. The distinction between them is that the former has no desire to impose its values on the general society while the latter does. One place to begin that is suggested by the deficiencies in popular culture as described above, would be the

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    Essay Length: 332 Words / 2 Pages
    Submitted: December 30, 2009 By: Tommy
  • Aluminum

    Aluminum

    Aluminum (Nora/E8-1) A chemical element in the boron group in group 13 of the periodic table, it is Aluminum, aluminum is nonconductive. Hans Christian Oersted of Denmark in1825 first isolated it. In 1854, the first commercial process about extracting aluminum was created by someone who named Henri Sainte Claire Deville. He used some sodium aluminum chloride instead of the expensive potassium. He improved the whole method by what he had created. Aluminum was much more

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    Essay Length: 742 Words / 3 Pages
    Submitted: April 12, 2015 By: noraznorbella
  • Aluminum Foil and Tin Foil

    Aluminum Foil and Tin Foil

    Before the 1900s, tin was commonly used to package household foods. Since it protected the foods inside, and it could be bent with ease, it was regarded as an inexpensive, easy and health conscious way to keep foods fresh. Some of its disadvantages, which lead to its defeat to aluminum, included the fact that it could only be rolled thicker than aluminum; it became brittle when warm, reducing its malleability greatly, and the tin foil

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    Essay Length: 652 Words / 3 Pages
    Submitted: November 14, 2009 By: Mike
  • Aluminum Sulfate

    Aluminum Sulfate

    Clean and pure water is essential to human health. Therefore, removal of contaminants from wastewater is important to ensure that we consume only clean water. Flocculation is a process in water treatment operation which is useful in separating out sediment, removing harmful substances, and to treat colloids in water. The degree of flocculation can be increased by adding flocculating agents, also known as flocculants. [1] Aluminum sulfate, commonly known as alum, is a type of

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    Essay Length: 676 Words / 3 Pages
    Submitted: June 12, 2010 By: Tasha
  • Aluminun

    Aluminun

    Austin Pyke 8/28/07 Chemistry Aluminum Aluminum was first discovered by Hans Christian Orsted, a Danish Chemist, but it was in impure form. Aluminum is the most abundant metal on Earth and the third most abundant element in the Earth's crust. Aluminum is 8.2% of the Earth's crust, yet it is almost always found in a compound such as Aluminum Oxide and Potassium Aluminum Sulfate. Aluminum is the fourth lightest metal, behind only lithium, beryllium and

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    Essay Length: 535 Words / 3 Pages
    Submitted: January 16, 2009 By: Anna
  • Alzheimer Disease

    Alzheimer Disease

    In 1901, Dr. Alois Alzheimer, a German psychiatrist, identified the first case of what became known as Alzheimer's disease, he studied his patient who within five years of study died from it, that is when the disease was announced publicly. The Alzheimer’s disease was only linked to those of a certain age about 45-65 and only later was it discovered that the disease itself could be linked to all ages. Eventually, the term Alzheimer's disease

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    Essay Length: 1,017 Words / 5 Pages
    Submitted: February 20, 2010 By: Mikki
  • Alzheimer's Disease

    Alzheimer's Disease

    Alzheimer Alzheimer’s disease is a brain disorder named for German physician Alois Alzheimer who first described it in 1906. Scientists have learned a great deal about Alzheimer’s disease in the century since Dr. Alzheimer first drew attention to it. Today we know that Alzheimer’s: • Is a progressive and fatal brain disease. More than 5 million Americans now have Alzheimer’s disease. Alzheimer's destroys brain cells, causing problems with memory, thinking and behavior severe enough to

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    Essay Length: 888 Words / 4 Pages
    Submitted: November 21, 2009 By: Vika
  • Alzheimer's Disease

    Alzheimer's Disease

    Owings ________________ Jeremiah Owings Dr. Mary Hayes Biological Science 102 21 April, 2017 Alzheimer’s Disease What is Alzheimer’s? According to the Merriam-Webster’s dictionary, “Alzheimer’s Disease is a degenerative brain disease of unknown cause that is the most common form of dementia. It usually starts in late middle age or in old age and results in progressive memory loss, disorientation and changes in personality and mood. It is marked histologically by the degeneration of brain neurons

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    Essay Length: 2,822 Words / 12 Pages
    Submitted: June 11, 2017 By: kristieowings
  • Alzheimer's Disease: A Cure on the Horizon?

    Alzheimer's Disease: A Cure on the Horizon?

    Alzheimer’s Disease: A Cure on the Horizon? It is estimated that about 4.5 million people in the United States have Alzheimer’s. This number has more than doubled since 1980. It affects all races. About one in ten people over the age of sixty-five have Alzheimer’s, and as many as five in ten people over the age of eighty-five have Alzheimer’s. A person with Alzheimer’s disease will live an average of eight years and up to

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    Essay Length: 620 Words / 3 Pages
    Submitted: December 5, 2009 By: Wendy
  • Alzheimer's Disease: Fundamental Research Paves the Way for Therapeutics

    Alzheimer's Disease: Fundamental Research Paves the Way for Therapeutics

    Alzheimer’s disease: fundamental research paves the way for therapeutics. Introduction: biotechnology’s ambitious goals Until recently, the discovery of a successful drug wasn’t actually the logical end point of the elucidation of a disease process. Rather, it was dependent on major doses of luck and coincidences. One speaks of �serendipity’: �the effect by which you accidentally discover something fortunate, especially while looking for something else entirely’. A world-famous example is Fleming’s discovery of penicillin as a

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    Essay Length: 7,543 Words / 31 Pages
    Submitted: December 10, 2009 By: July
  • Alzheimer's Disease: Not Just Loss of Memory

    Alzheimer's Disease: Not Just Loss of Memory

    Introduction Alzheimer's disease, a neurodegenerative brain disease, is the most common cause of dementia. It currently afflicts about 4 million Americans and is the fourth leading cause of death in the United States. Furthermore, Alzheimer’s disease is the leading cause of mental impairment in elderly people and accounts for a large percentage of admissions to assisted living homes, nursing homes, and other long-term care facilities. Psychotic symptoms, such as delusions and hallucinations, have been reported

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    Essay Length: 2,333 Words / 10 Pages
    Submitted: November 19, 2009 By: Monika
  • Alzheimers Disease

    Alzheimers Disease

    You have to begin to lose your memory, if only in bits and pieces, to realize that memory is what makes on lives. Life without memory is no life at all, just as an intelligence without the possibility of expression ..is not really an intelligence. Our memory is coherence, our reason, our feeling, even our action. Without it, we are nothing. What about the people who have lost it completely…. What is … Alzheimer's is

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    Essay Length: 931 Words / 4 Pages
    Submitted: January 12, 2010 By: Mike
  • Alzheimers Disease, Nursing

    Alzheimers Disease, Nursing

    Nursing Care and Understanding of Alzheimer Disease Introduction Loss of memory, forgetfulness, personal change, even death, are common related disorders caused by a disease called Dementia or better known to most people as Alzheimer’s disease. This disease is the fourth leading cause of death in the United States in persons 65 and older. Alzheimer’s disease is, named for the German neurologist Alois Alzheimer, who first recognized the disease in 1907; Alzheimer’s disease is characterized by

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    Essay Length: 1,513 Words / 7 Pages
    Submitted: January 23, 2010 By: Steve
  • Alzheimer’s

    Alzheimer’s

    Alzheimer's Disease is a progressive and irreversible brain disease that destroys mental and physical functioning in human beings, and invariably leads to death. It is the fourth leading cause of adult death in the United States. Alzheimer's creates emotional and financial catastrophe for many American families every year. Fortunately, a large amount of progress is being made to combat Alzheimer's disease every year. To fully be able to comprehend and combat Alzheimer's disease, one must

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    Essay Length: 723 Words / 3 Pages
    Submitted: December 26, 2009 By: Janna
  • Alzheimer’s

    Alzheimer’s

    “Alzheimer’s Disease” Alzheimer’s is a disease of the brain that causes a steady decline in memory. This results in dementia, which is loss of intellectual functions severe enough to interfere with everyday life. Alzheimer’s disease is the most common cause of dementia, affecting ten percent of people over 65 years old, and nearly 50 percent of those age 85 or older. My grandmother was diagnosed with “probable” Alzheimer’s disease over two years ago. After finding

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    Essay Length: 706 Words / 3 Pages
    Submitted: February 4, 2010 By: Yan
  • Alzheimer’s Disease

    Alzheimer’s Disease

    Alzheimer’s disease is a progressive, brain disorder that causes a slow and permanent decline in memory, language skills, perception of time and space, and, eventually the ability to care for oneself (Encarta, 1). Alzheimer’s is the most common from of dementia. Dementia is the impairment of memory and other mental powers due to a disease. It is also the fourth leading cause of death among older adults (Do You Need). According to the Alzheimer’s Association,

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    Essay Length: 1,647 Words / 7 Pages
    Submitted: November 15, 2009 By: Bred
  • Alzheimer’s Disease

    Alzheimer’s Disease

    Alzheimer’s Disease. Some of us may have heard of it, may have read about it, may have seen it in movies, or may even have encountered someone with it. I, for one, have seen people with Alzheimer’s disease and most of them are the older adults(60 years old and above). There were quite a few of them in the nursing home where I used to work at as a CNA. As far as I know

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    Essay Length: 1,467 Words / 6 Pages
    Submitted: November 16, 2009 By: David
  • Alzheimer’s Disease

    Alzheimer’s Disease

    Alzheimer’s Disease Alzheimer’s disease is a form of dementia, “a brain disorder that seriously affects a person’s ability to carry out daily activities (Shenk 14)”. Alzheimer’s is a progressive and irreversible brain disorder that slowly destroys a person’s memory and ability to learn, make judgments, communicate, and accomplish daily activities. As Alzheimer’s progresses, individuals may also experience changes in personality and behavior, such as anxiety, suspiciousness or aggravation, as well as illusions or hallucinations. Alzheimer’s

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    Essay Length: 1,441 Words / 6 Pages
    Submitted: December 8, 2009 By: Jessica
  • Alzheimer’s Disease

    Alzheimer’s Disease

    In this day and age, it seems as though almost everyone has experience a loved one taken away form a very serious disease known as Alzheimer’s disease. Alzheimer’s disease is unbelievably devastating for everyone affected by it. This disease is causing major economical problems such as less occupancy in the nursing homes, and hospitals due to the rising population of elderly men and women being diagnosed with it everyday. Because there is not yet

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    Essay Length: 950 Words / 4 Pages
    Submitted: January 11, 2010 By: Top
  • Alzheimer’s Disease

    Alzheimer’s Disease

    Alzheimer’s Disease (Nervous System) Alzheimer’s Disease Introduction Alzheimer's disease is a progressive, degenerative neurological disorder that leads to impairments in memory, thinking and reasoning. It is a late-life illness that causes a form of brain failure. It produces confused thinking, impairs judgment, changes personality, alters behavior. The illness is progressive and ultimately results in death. While it cannot be cured, it can be treated. During the earliest stages of Alzheimer's disease, many people are

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    Essay Length: 955 Words / 4 Pages
    Submitted: January 28, 2010 By: Monika
  • Alzheimer’s Disease

    Alzheimer’s Disease

    Alzheimer’s Disease is very mentally debilitating disease. It was discover in 1906, by Alois Alzheimer, a German Physician. He had a patient that was in her fifties and who seemed to be suffering from a mental illness. When she died in 1906, the autopsy revealed dense deposits, which are now called neurotic plaques. They were outside and around the nerve cells in her brain. In the cells were neurofibrillay tangles or twisted strands of fiber.

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    Essay Length: 1,657 Words / 7 Pages
    Submitted: February 11, 2010 By: Tasha

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