One of the most known theories is the Activation Synthesis Theory. J. Allan Hobson developed this theory in the late 1970s after running an experimental study on cats focusing on rapid eye movement sleep (REM) (Domhoff‚ 2003). The Activation Synthesis Theory simply states that our cerebral cortex is trying to interpret random electrical activity we have while sleeping. Hobson argued and quoted that random electrical signals from the brainstem force the cortex to make “the best of a bad job
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the gravity filter and the Hirsch funnel‚ as it was difficult to obtain the entire product from the filter paper and the sides of the funnel. As the experiment follows a semi microscale technique even a small amount of lost product yields a great loss in the yield 4. These sources of error could be minimized by doing a larger reflux in order to increase the yield. However‚ as the purpose was to simply synthesis SnI4 in order to identify the stable oxidation states (the melting point range requires
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synthesizing p-Aminophenol with Acetic anhydride. This reaction occurs when the amine group of the p-aminophenol is acetylated by the acetic anhydride. The resultant is an amide functional group (Ellis‚ 2002). However‚ the product that is obtained from this product is a crude solid which cannot be used as an analgesic and therefore the crude solid must be purified. This purified product is what is later put into the analgesic. In this experiment‚ the procedures that are important are vacuum filtration
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In both the poems‚ “Five AM” by Estate of William Stafford and “Five Flights Up” by Elizabeth Bishop‚ they reflect upon the speaker’s early morning surroundings‚ but through different speaker’s point of view. Strafford employs stanzas‚ asyndeton‚ and personification to describe the morning surrounding and the state of mind‚ while Bishop utilizes injection‚ simple sentence and asyndeton. Strafford sets the scene with a peaceful tone and progresses into a rejuvenated tone. Bishop‚ on the other hand
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Rebecca Boreham 7/1/14 Chem 2423 Experiment #5 Synthesis of Aspirin Elizabeth Ajasa Kaylee Seymour Lauren Hatfield Suveda Perikala Introduction/ Purpose Aspirin is the most commonly used drug in the United States. Forty million pounds are produced each year. The chemical name for aspirin is Acetylsalicylic acid. Aspirin is a pain reliever and a fever reducer. Aspirin originated from the bark of a White Willow Tree. Chewing the bark however is extremely acidicand irritates the mucous membranes
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Synthesis of Aspirin (Acetylsalicylic Acid) Abstract: This experiment is about the synthesis of aspirin under laboratory conditions. Aspirin is prepared by reacting salicylic acid and acetic anhydride; in the presence of sulfuric acid. After fully dissolving the salicylic acid with acetic anhydride‚ the solution is cooled and cold water is then added. Once the crystals form they are then filtered and left to dry out. There mass is measured and recorded then the yield is calculated. Introduction:
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Procedure The procedure stated in Chem 2120 experiment 6 Williamson Ether Synthesis of Phenacetin laboratory manual was followed without any major changes. Data and results Compound Amount used MW (g/mol) Moles Stoichiometry/Comments acetaminophen 0.354 g 151.16 2.34 x 10-3 limiting reagent ethyl iodide 0.3mL 155.97 3.75 x 10-3 1.6 equiv ’s sodium ethoxide 2.6mL 68.05 3.3 x 10-2 catalyst‚ reaction solvent crude product obtained: phenacetin 0.32g
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YOUR NOTES UNIT 2 NOTES DNA (deoxyribonucleic acid) DNA Functions • Stores genetic information and copies itself (replication) to pass on the information • Contains genes (instructions to make proteins) • Instructs cell’s activities DNA Structure • DNA is a polymer of nucleotides • Chromosomes (DNA strand + associated proteins ie. Histones wrap DNA around like a spool = condensed chromatin) ↓ genes (sections of a chromosome that codes for a protein) ↓ nucleotides (3 parts:
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(Source F). Roberts also goes on to affirm‚ “... in the United States‚ 80 percent of us live in large‚ densely populated urban areas… typically hundreds of miles‚ often thousands of miles‚ from the major sources of production” (Source F). Modern society has moved away from rural areas to urban cities far from the production of food. These choices make it increasingly difficult for some to take part in this movement. Dueling choices have become a major roadblock for many who strive to take part‚ and
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shall the United States do to prepare for the possibility of a biological attack? In order for the United States to be prepared for a terrorists attack with biological usage‚ they shall take the necessary precautions in order to protect their country from a possible microorganism battle. By taking exclusive precautions such as testing the effects of certain bacteria‚ the United States can be well prepared and possible prevent a biological warfare. When observing the usage of biological weapons used
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