On September 11‚ 2001 there was a terrible attack in United States in New York City and the Washington‚ D. C.‚ which was launched by the Islamic terrorist group called al- Qaeda. On that Tuesday morning al-Qaeda hijacked four planes which were crashed into the World Trade Center North Tower‚ South Tower and the pentagon. The first attack was taken place at 8:46 am in World Trade Center North Tower by American Airlines Flight 11 and the second attack was taken place at 9:03 am in South tower by
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ChE 171 Assignment 1. Essential and Non-essential Amino acids Amino acids are organic compounds which contain both an amino group and a carboxyl group and may be divided into two groups basing on whether they are produced internally by the human body or not: essential and non-essential amino acids (hyperphysics.phy-astr.gsu.edu‚ 2012). An essential amino acid (indispensable amino acid) is an amino acid which an organism needs to ingest because it is necessary for
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Fatty acids and glycerol are the sub unit of most lipids. In the synthesis of a fat or oil three fatty acid molecules combine with one molecule of glycerol to form a triglyceride. Triglycerides make up about 95% of all dietary fats. This is formed by condensation (water is lost). Triglycerides are the chemical form in which most fat exists in food as well as in the body. They’re also present in blood plasma and‚ in association with cholesterol‚ form the plasma lipids. Fig 1.0 shows
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Unfortunately they did. After the bombing in the WTC‚ al-qaeda completed a series of attacks on both US soldiers and other groups outside the US. After being exposed for these deadly encounters‚ Bin laden is forced to leave Sudan‚ and he flees to Afghanistan. Now people are "awake" and aware of terrorism. Warnings started to go out‚ to alert
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determination of Ascorbic acid Concentration in an Unknown Solution Introduction: The naturally occurring organic compound with antioxidant properties is Ascorbic acid shortly referred as (AA). Normally the color of Ascorbic acid is white‚ but in some cases of impure samples it appears yellow in color. Ascorbic acid is solid in state. In water it dissolves well to give mildly acidic solutions. Ascorbic acid is one form ("vitamer") of vitamin C [1]. So‚ Ascorbic Acid (AA) in other terminology
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Vitamin C Introduction: The lab consists in determining the vitamin C concentration in a solution by a redox titration using iodine. Vitamin C (ascorbic acid) is a water-soluble‚ essential oxidant that plays a vital role in the protection of the body from infections and disease it is acquired from primary fruits and vegetables. With the use of different materials as natural orange juice‚ Tampico (chemical orange juice) and other solutions that contain vitamin C we will find the amount of vitamin
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An Unknown Amino Acid From Titration Abstract Experiment 11 used a titration curve to determine the identity of an unknown amino acid. The initial pH of the solution was 1.96‚ and the pKa’s found experimentally were 2.0‚ 4.0‚ and 9.85. The accepted pKa values were found to be 2.10‚ 4.07‚ and 9.47. The molecular weight was calculated to be 176.3 while the accepted value was found to be 183.5. The identity of the unknown amino acid was established to be glutamic acid‚ hydrochloride. Introduction
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Privacy is the state of being free from intrusion in one’s personal life‚ or so it used to be. In Simson Garfinkel’s article “Privacy Under Attack” he discusses how technology has invaded people’s privacies over the years and continues to do so. From telephone systems and mail to car computers and surveillance cameras. Simson discusses positive points that make perfect sense in his article‚ but he also assumes false points‚ does not back them up with strong evidence‚ and makes logical fallacies
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Determination of the ASA Content of Aspirin Due Date: September 16‚ 2013 Experiment#: 2b Title: Determination of the ASA Content of Aspirin Aim: To determine the Molar Concentration of NaOH and HCl acid used in their Standardization processes and to determine the acetylsalicylic acid (ASA) content in Aspirin. Materials/Apparatus: materials used are the same as that outlined in the laboratory procedure prepared by the laboratory instructor. Procedure: The procedure used is the same as
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As a liquid evaporates‚ it lowers the temperature of the substances around them‚ because evaporation is an endothermic process. In the graph‚ each substance has a different curve. Some lowered the temperature much more than others. This is because different substances require differing amounts of energy to evaporate. To test this‚ the temperature change from the evaporation of 4 different alcohols was measured and compared‚ along with cyclohexane. Methanol had the largest change in temperature‚ 18
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