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British Medical Journal Depressive Disorder
1,639 words... s of yet. Prozac acts on Serotonin levels, where as Reboxetine acts on the noradrenaline levels. Some experts believe that drive and motivation are related to noradrenaline, and mood states are associated with serotonin. Like the SSRIs (specific serotonin reuptake inhibitors), the noradrenaline reuptake inhibitor Reboxetine does not have the major adverse side effects as the trycilic antidepressants, such as sexual dysfunction. Reboxetine has been shown to take effect much faster than any ot...
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Nail Polish Sulfuric Acid
677 wordsAIM To prepare and purify an ester. &# 61656; concentrated sulphuric acid &# 61656; sample of nail polish (for smell comparison) &# 61656; separating funnel and stopper &# 61656; 1 mol L- 1 sodium carbonate solution After carefully assembling the apparatus and given a safety approval by the teacher, I carefully added the ethanol and glacial acetic acid into the pear shaped flask. A few marble chips were added to avoid the larger reactive bursts of the mixture during refluxing that were predicted...
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Paddle Pop Stick 2 Co 3 Flame
663 wordsExperiments to determine the identity of metals by examining the colour of flame when samples of that metal are heated. The aim of this experiment was to find out whether different metals had different reactions when subjected to the flame of the Bunsen burner. This might then allow the classification and identification of certain metals if they have their own reactions, which will be different coloured flames for this experiment. It was hard for me to predict what would occur during the experim...
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Earth Atmosphere Years Ago
1,031 wordsH. G. Wells wrote in his book, "War of the Worlds", about Martian invasion toward earth. He mentioned, "No one would have believed, in the last years of the nineteenth century that this world was being watched keenly and closely by intelligences greater than man's and yet as mortal as his own; that as men busied themselves about their various concerns they were scrutinized and studied, perhaps almost as narrowly as man with a microscope might scrutinize the transient creatures that swarm and mul...
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Life On Mars Electron Microscope
1,080 words... ite burning up upon entry into the earth's atmosphere vaporizing PAHs near the surface. "No PAHs were found in the meteorite's exterior crust, but the concentration of PAHs increased in the meteorite's interior to levels higher that ever found in Antarctica" Also the concentration of PAHs is greater that what would have been in the atmosphere at the time impacted. Again this makes the source more likely to be extraterrestrial. PAHs that occur in other meteorites within the galaxy their sourc...
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H 2 O Metric Tons
485 wordsMagnesium, symbol Mg, is a silvery white metallic element that is relatively un-reactive. In group 2 of the periodic table, magnesium is one of the alkaline earth metals. The atomic number of magnesium is 12. Properties and Occurrence The metal, first isolated by the British chemist Sir Humphry Davy in 1808, is obtained today chiefly by electrolysis of fused magnesium chloride. Magnesium is malleable and ductile when heated. With the exception of beryllium, it is the lightest metal that remains ...
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Tragedy Of The Commons Coral Reefs
998 wordsResearch in the Disciplines First Paper Final Draft Tragedy of the commons invading our environmental rights: Case study Coral Reefs In our world there are many resources, all of which people do not have a choice in sharing such as our air and our oceans. These resources are looked at as infinite, although this is not actually the case. Each time one person does something to pollute or use these types of resources, it affects the whole of society. This is the idea of the tragedy of the commons. ...
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Great Barrier Reef Calcium Carbonate
1,069 wordsIn order to understand what Diane Johnson meant in her story and what symbolism reef had I think it will be appropriate to examine in depth what is Great Barrier Reef, with which the main theme of the story was associated. Great Barrier Reef is undoubtedly a great symbol used for expression of protection, beauty and weakness at the same time. It is possible to see how this one symbol can incorporate so many different meanings through discovering wonder of nature Australian Great Barrier Reef. Th...
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Support For Large Segments Support For Large Polymers
922 wordsBiodegradable polymer sutures Biodegradation: A biological agent (an enzyme, microbe or cell) responsible for degradation. Most degradable polymers are polyesters. Polymers prepared from glycolic acid and lactic acid have found a multitude of uses in the medical industry, beginning with the biodegradable sutures first approved in the 1960 s. Since that time, diverse products based on lactic and glycolic acid and on other materials, including poly (dioxanone), poly (trim ethylene carbonate) copol...
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Life On Earth B And C
1,459 wordsCarbon dioxide is a colorless, odorless, non-toxic, and slightly acid-tasting gas. Sometimes referred to as a carbonic acid gas, the molecule consists of one atom of carbon joined to two atoms of oxygen. It occurs naturally in the atmospheres of many planets, including that of earth. Carbon dioxide is uniformly distributed over the earths surface at a concentration of about 0. 033 %, or 330 parts per million. It was called fixed air by the Scottish chemist and physician Joseph Black in the 1750 ...
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Food And Shelter Coral Reefs
682 wordsCorals and Adaptations Coral reefs are among the most diverse and productive communities on Earth. They are found in the warm, clear, shallow waters of tropical oceans worldwide. Reefs have functions ranging from providing food and shelter to fish and invertebrates, to protecting the shore from erosion. Although many corals resemble plants, they are actually members of the animal phylum Cnidaria. Most corals are colonial, which means that each coral is made up of many individual polyps connected...
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Plays An Important Role Dental Caries
2,097 wordsDental Disease One significant problem in dentistry is the progression of carious lesions in the teeth. Carious lesions or dental caries is defined as a localized, progressively destructive disease of the teeth that starts at the external surface with an apparent dissolution of the inorganic components by organic acid. The tendency to the development of dental caries depends on specific surfaces of teeth and several other factors which include: type of tooth, location and length of exposure to t...
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Pure Form Sodium Sodium Hydroxide Soda
393 wordsLife could not exist without compounds of sodium. These compounds hold water in body tissues, and a severe deficiency of sodium can cause death. Blood contains sodium compounds in solution. Sodium compounds are used in industry in the manufacture of chemicals and pharmaceuticals, in metallurgy, in sodium vapor lamps, and in the production of hundreds of every day products. One of the most common sodium compounds is table salt, or sodium chloride. In its pure form sodium is a silver-white, soft a...
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Degrees Celsius Mental Disorders
1,099 wordsIn 1817, an aging Swedish chemist was pouring over his work on a late afternoon in Stockholm, Sweden. He was analyzing a strange ore named Petalite that had been procured from an island off the coast of Sweden called Ut&our; . The ore Petalite (which is now recognized to be Li Al (Si 2 O 5) 2) had been discovered by a Brazilian scientist, Jos&execute; Bonus´ cio de Andrada e Silva towards the end of the 18 th century on a visit to Sweden. This Swedish scientist, Johann August Arfvedson, de...
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Sirs Cd Rom Atlantic Monthly
1,739 wordsLife on Other Planets As the future proceeds and life begins getting more technical, Earth may not be the only place where the human race resides. There is already talk that some day Mars will be inhabited by humans. Jupiter's moon Europa may be the next after that. Two space missions have already studied Mars. The Pathfinder, which landed on the surface of Mars was one of the missions, and the Global Surveyor, which is a satellite, is the other mission. Although Europa has no set missions yet, ...
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Sulfur Dioxide Acetic Acid
1,936 wordsLead, symbol Pb, dense, bluish-gray metallic element that was one of the first known metals. The atomic number of lead is 82; the element is in group 14 (or IVa) of the periodic table. Lead was mentioned in the Old Testament. It was used by the Romans for making water pipes, soldered with an alloy of lead and tin. Few metals have been used in more different ways than lead. Lead ornaments and coins have been in use since ancient times. In the Middle Ages strips of lead called came's were first us...
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Calcium Carbonate Hydrochloric Acid
999 wordsReaction Rate Between Calcium Carbonate And Hydrochloric Reaction Rate Between Calcium Carbonate And Hydrochloric Acid Calcium carbonate and hydrochloric acid react together. Plan an investigation to examine the factors that effect the reaction rate between them. I am trying to find out what affects the reaction rate of calcium carbonate and hydrochloric acid. Things that affect the reaction rate are the temperatures of the hydrochloric acid, the amount of hydrochloric acid, the concentration of...
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Plate Tectonics Ocean Basins
530 wordsPlate Tectonics is theory of global tectonics (geologic structural deformations) that has served as a master key in modern geology for understanding the structure, history, and dynamics of the earths crust. The theory is based on the observation that the earths solid crust is broken up into about a dozen semirigid plates. The boundaries of these plates are zones of tectonic activity, where earthquakes and volcanic eruptions tend to occur. Plate Tectonics also are the cause of major features that...
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Baking Soda Hydrochloric Acid
3,324 wordsAim: To find which powder, of four, is best for neutralising excess stomach acid. Prediction: With stomach pain relief powders being a consumer product, I predict that the best cure for neutralising a build up of stomach acid will be the one which has the lowest cost to successfully neutralise the dilute hydrochloric acid (HCl) (0. 5 mol) (to represent the excess acid found in our stomachs). This powder would have be the one which costs less than any of the others to bring the acid build up to a...
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