Live chat

Research paper topics, free example research papers

Free research papers and essays on topics related to: calcium

  • 133 results found, view research papers on page:
  • 1
  • 2
  • 3
  • >>>
  • Calcium Element - 228 words
    Calcium Element Calcium Element symbol...CA Atomic weight...40.08 Element number...20 Number of protons...20 Number of electrons...20 Number of neutrons...20 Density at...68? F Boiling point...2,264?F Melting point...1,562?F Calcium was discovered by Sir Humphrey Davis in 1808. Calcium is a mineral found in abundance in the Earths outer crust. It is the fifth most abundant mineral in the Earth crust. Calcium is considered a major mineral because it is found in large quantity in the body. Milk also has a high amount of calcium and it is the best way to get calcium. Daily dietary requirements exceed over 100 mg. Calcium forms and maintains teeth, it helps with blood clotting, it helps build ce ...
    Related: calcium, boiling point, atomic weight, melting point, davis
  • Calcium In Diet - 513 words
    Calcium In Diet Many people choose to avoid milk and other dairy products because they contain fat, cholesterol, allergenic proteins, lactose, and frequently traces of contamination. Milk is also linked to juvenile-onset diabetes, and other serious conditions. Happily, there are plenty of other, safer and more reliable sources of calcium. Keeping your bones strong depends more on preventing the loss of calcium from your body than on boosting your calcium intake. Some cultures consume no dairy products and typically ingest only 175 to 475 milligrams of calcium per day. However, these people generally have low rates of osteoporosis. Many scientists believe that exercise and other factors have ...
    Related: calcium, diet, active life, dairy products, mineral
  • A Journey With Breast Cancer - 1,368 words
    A Journey With Breast Cancer A Journey with Breast Cancer What is Cancer? The body is made up of many types of cells. Normally, cells grow and divide to produce more cells only when the body needs them. This is an orderly process which keeps the body healthy. Sometimes cells keep dividing when new cells are not needed. They may form a mass of extra tissue called a growth or tumor. Benign tumors are not a threat to life but malignant tumors are cancer. Cells in these tumors can invade and damage nearby tissues and organs. The fear is that cancer cells can break away from a malignant tumor and enter the bloodstream or lymphatic system. That is how breast cancer spreads and forms other tumors i ...
    Related: breast, breast cancer, cancer, cancer institute, national cancer, national cancer institute
  • Acid Precipitation - 663 words
    Acid Precipitation Acid Precipitation Our atmosphere functions as living ecosystem of chemical reactions. Through the help of the water cycle, chemicals pass through the atmosphere and are eventually taken up by the soil, surface water, or organic materials. Human beings have added enormously to the atmospheric burden of many toxic substances. The most prominent evidence of this is the presence of acid rain: precipitation and particles that have been made acidic by air pollution. Acid rain is a direct consequence of the atmosphere's self-cleansing process. The tiny droplets of water that make up clouds continuously capture suspended particles and soluble trace gases. Not all trace gases can ...
    Related: acid, acid rain, precipitation, air pollution, power plants
  • Acid Rain - 999 words
    ... an affect the fish in the water in two ways: directly and indirectly. Sulfuric acid directly interferes with the fish's ability to take in salt, oxygen and nutrients crucial for daily life. Osmoregulation is the process of maintaining the delicate balance of salts and minerals in their tissues. For freshwater fish, maintaining osmoregulation is key in their survival. Acid molecules, which are a result of acid rain in the water, cause mucus to form in the fishs gills. This in return prevents the fish from absorbing oxygen. If the fish are unable to absorb oxygen, the consequence could be the eventual suffocation of fish and the low pH could throw off the balance of salts in the fish tissu ...
    Related: acid, acid rain, rain, new media, modern society
  • Acid Rain - 995 words
    ... ish in the water in two ways: directly and indirectly. Sulfuric acid directly interferes with the fish's ability to take in salt, oxygen and nutrients crucial for daily life. Osmoregulation is the process of maintaining the delicate balance of salts and minerals in their tissues. For freshwater fish, maintaining osmoregulation is key in their survival. Acid molecules, which are a result of acid rain in the water, cause mucus to form in the fishs gills. This in return prevents the fish from absorbing oxygen. If the fish are unable to absorb oxygen, the consequence could be the eventual suffocation of fish and the low pH could throw off the balance of salts in the fish tissue. Salt levels ...
    Related: acid, acid rain, rain, modern society, staying alive
  • Acid Rain - 1,289 words
    Acid Rain Pollution comes in various forms. Whether its toxic waste, CFCs, or sewage, they are all hazardous, to the earth. These can deplete the earth and its inhabitants of resources, causing a harmful change. A product of pollution is acid rain. We shall see that acidification is harmful to all forms of life. Acid rain is any form of precipitation that is polluted by sulphur dioxide (SO2), and nitrogen oxides (NOX). This acid precipitation can be in the form of rain, snow, sleet, fog, or cloud vapors. The acidity of substances dissolved in water are measured by their pH levels. Normal precipitation pH levels fall between 5.0-5.6.2 When levels fall below these numbers, then the precipitati ...
    Related: acid, acid rain, rain, human activity, food supply
  • Acid Rain - 1,774 words
    Acid Rain What is acid rain? Acid rain is the term for pollution caused when sulfur and nitrogen dioxides combine with atmospheric moisture. The term 'acid rain' is slightly misleading, and would be more accurate if deemed 'enhanced acid rain', as rain occurs acidic naturally. Acidity is measured on what is know as the pH scale. Fourteen is the most basic, seven is the most neutral, and zero is the most acidic. Pure rain has a pH level of 7, which is exactly neutral. The acidity of rain is determined by the pH of pure water in reaction with atmospheric concentrations of carbon dioxide, resulting in carbonic acid. These particles partly dissociate to produce hydrogen ions and bicarbonate ions ...
    Related: acid, acid rain, rain, electric utilities, major change
  • Acid Rain - 1,829 words
    ... . These particles collect on the leaves of the tree, and studies have shown that when these particles contain acid they can cause damage to the leaves. The leaves are the part of the tree that help make food, hence any damage to the leaves will result in harm to the health of the entire tree. Coniferous trees are vulnerable to the harmful effects of acid rain as well. The tree's needles are designed to nourish the tree after they fall to the ground. Each needle houses whole colonies of microscopic bacteria and algae that help the tree change nitrogen into food at the roots. Acid rain will often burn away this material, thereby reducing adequate food supply, and weakening the tree's healt ...
    Related: acid, acid rain, rain, eastern canada, human health
  • Acid Rain - 312 words
    Acid Rain Acid Rain Acid rain forms high in the clouds in a gaseous form. Theses gasses stay in the atmosphere until they come in contact with rain that dissolves the gasses. A mild solution of sulfuric and nitric acid is formed. These drops fall to the earth and get into our water table beneath the surface. From there they are collected into streams, rivers, and lakes that eventually will lead to the ocean. Rain isn't the only form acidity falls to the earth. About half of all the acidity falls back through dry deposition as gasses and dry particles. The wind blows the acid particles onto cars, homes, trees, and buildings. The acid discharge is then washed from the surfaces by rain. The run ...
    Related: acid, acid rain, rain, air pollution, water table
  • Acid Rain - 1,731 words
    Acid Rain Introduction: What Causes Acid Rain? One of the main causes of acid rain is sulfur dioxide. Natural sources, which emit this gas, are Volcanoes, sea spray, rotting vegetation and plankton. However, the burning of fossil fuels, such as Coal and oil, are largely to be blamed for approximately half of the emissions of this gas in the world. When sulfur dioxide reaches the atmosphere, it oxidizes to first form a sulfate ion. It then Becomes sulfuric acid as it joins with hydrogen atoms in the air and falls back down to earth. Oxidation occurs the most in clouds and especially in heavily polluted air where other compounds such as ammonia and ozone help to catalyze the reaction, changing ...
    Related: acid, acid rain, rain, case study, ohio river
  • Acid Rains - 540 words
    Acid Rains Acid rain refers to all types of precipitation--rain, snow, sleet, hail, fog--that is acidic in nature. Acidic means that these forms of water have a pH lower than the 5.6 average of rainwater. Acid rain kills aquatic life, trees, crops and other vegetation, damages buildings and monuments, corrodes copper and lead piping, damages such man-made things as automobiles, reduces soil fertility and can cause toxic metals to leach into underground drinking water sources. Rain is naturally acidic because carbon dioxide, found normally in the earth's atmosphere, reacts with water to form carbonic acid. While "pure" rain's acidity is pH 5.6-5.7, actual pH readings vary from place to place ...
    Related: acid, acid rain, carbon dioxide, bodies of water, dioxide
  • Air Pollution - 1,567 words
    Air Pollution Acid rain is a problem that has plagued earth for years. It is poisoning our waters, animals, plants, soil, and more. It is a problem that can not be ignored or it might have catastrophic results on our environment. Acid rain is caused by air pollution, which is due to man-made actions. Scientists have discovered that air pollution from the burning of fossil fuels is the major cause of acid rain. Power plants and factories burn coal and oil, which is used to produce the electricity we need to heat and light our homes and to run our electric appliances. We also burn natural gas, coal, and oil to heat our homes, and our cars, trucks, boats, and airplanes use gasoline to run, whic ...
    Related: air pollution, pollution, pollution prevention, power plants, fossil fuel
  • Alchemy - 1,850 words
    ... e of Hermetic theory and the consciousness in the alchemical mind that what might with success be applied to nature could also be applied to man with similar results. Says Mr. Waite, "The gold of the philosopher is not a metal, on the other hand, man is a being who possesses within himself the seeds of a perfection which he has never realized, and that he therefore corresponds to those metals which the Hermetic theory supposes to be capable of developing the latent possibilities in the subject man." At the same time, it must be admitted that the cryptic character of alchemical language was probably occasioned by a fear on the part of the alchemical mystic that he might lay himself open t ...
    Related: alchemy, first half, chemical analysis, modern science, appeal
  • Alcoholism - 2,013 words
    ... times increased consumption of alcohol are cited in evidence. But these data invariably fail to take account of changes in availability or use of facilities, changes in admission or diagnostic policies, or changes in the source of beverages--for example, from unrecorded to recorded supplies. In the Soviet Union a change in the internal political situation with the death of Stalin resulted in a shift from official denial that any significant problem of alcoholism existed to an outcry that its prevalence was widespread and serious, though no statistics were provided. Treatment of alcoholism The various treatments of alcoholism may be classified as physiological, psychological, and social. ...
    Related: alcoholism, carbon dioxide, psychoactive drugs, alcoholics anonymous aa, therapy
  • Alzheimer's: Is There A Cure - 1,058 words
    ... y, 2001). Johnson & Johnson say that the drug will be available starting in May. Another approach to finding a cure for Alzheimer's Disease is finding something that will block molecules that are possibly responsible for the disease. Bob Vassar designed and implemented an ingenious method for isolating the gene for an enzyme called beta-secretase, which is found to be a key culprit in the disease (Garber, 2001). While other drugs that are approved only improve the functions of those with the disease, this method could actually stop the progression, not just slow it down. There are some drawbacks to this method. What is not known about the enzyme beta-secretase, though seemingly linked to ...
    Related: cure, spend time, social change, federal drug administration, psychosis
  • Alzheimers Disease - 1,539 words
    Alzheimer`s Disease Alzheimers Disease is a progressive, degenerative disease that affects the brain. Individuals with AD experience a progressive and specific loss of cognitive function resulting from the differentiation of the limbic system, association neocortex, and basal forebrain. It is also accompanied by the deposition of amyloid in plaques and cerebrovasculature, and the formation of neurofibrillary tangles in neurons. Alois Alzheimer, a German doctor, diagnosed this disease for the first time in 1907. At that time it was considered a rare disorder. Currently, this tragic brain disorder affects approximately four million people; It is the most common type of dementia and the fourth ...
    Related: alois alzheimer, alzheimer's disease, alzheimers disease, physiological processes, limbic system
  • Alzheimers Disease : Neurobiology, Causes And Treatments Of - 960 words
    Alzheimers Disease : Neurobiology, Causes And Treatments Of Alzheimers disease : Neurobiology, causes and treatments of Alzheimer's Disease (AD) is one of the most common of the dementing illnesses. A progressive, degenerative disease that attacks the brain, causing impaired memory, thinking and behavior. A person with Alzhiemers Disease may experience personality and behavior changes, impaired judgment, confusion and difficulty finishing thoughts, following directions or even finding the right word to say in a conversation. Once advanced the sufferer may require a caretaker as daily chores become very difficult to accomplish. Evidence points toward amyloid as one of the main causes for the ...
    Related: alzheimer's disease, alzheimers disease, diagnosis treatment, main causes, nitric oxide
  • Anabolic Steroids - 1,099 words
    Anabolic Steroids Anabolic steroids (steroids for short) are used widely among bodybuilders to increase their testosterone, thus to get stacked or larger. Steroids seem to be a wonderful thing for these bodybuilders, but very few of them know just how they work and what the effects are. History The word "anabolic" portrays any substance, which accumulates nitrogen in muscle protein and from there builds muscle tissue. The bodys natural anabolic steroid is called testosterone, which men (naturally) obtain more of, than women do. Testosterone brings on the development of speed, mass, endurance, definition, and strength. Testosterone is naturally released into the blood stream, goes to differen ...
    Related: anabolic, anabolic steroids, steroid use, steroids, protein synthesis
  • Anatomy Of A Muscle Cell - 1,017 words
    Anatomy Of A Muscle Cell John Centore1 Anatomy and Physiology Dr. Jain Anatomy of Muscle Cells There are three types of muscle tissue in the human body. These muscle tissues are skeletal muscles, smooth muscles and cardiac muscles. Each of these muscle tissues has it very own anatomical makeup, which vary from muscle to muscle. The muscle cells in a muscle are referred to as muscle fibers, these fibers are skeletal muscle fibers, smooth muscle fibers and cardiac muscle fibers. The anatomy of a skeletal muscle fiber is formed during embryonic development. Skeletal muscle fibers arise from a hundred or more small mesodermal cells called myoblasts. The mature skeletal muscle fiber has a hundred ...
    Related: anatomy, anatomy physiology, cell, cell division, muscle, muscle growth
  • 133 results found, view research papers on page:
  • 1
  • 2
  • 3
  • >>>