Synthesis of Aspirin Name: Xuanyi Li Teaching assistant: Deirdre Zwilling November 15‚ 2009 Purpose: To synthesize aspirin‚ a common analgesic drug‚ via nucleophilic acid-catalyzed substitution reaction of salicyclic acid with acetic anhydride. The whole reaction is catalyzed by phosphoric acid. (The experiment involved three parts: The synthesis of aspirin‚ the isolation and purification of aspirin‚ and the estimation of the purity of the final product.) [pic] Procedure[1]: A mixture
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There has been a significant decline in mortality from breast cancer since the 1970s‚ this decline is linked with the fact that there is more availability of screening methods‚ mainly mammography‚ and there is a drastic improvement in the way advanced cancer is treated (Smith et al.‚ 2008). Dr. David Eddy‚ an early pioneer in evidence-based medicine conducted a study for the American Cancer Society (ACS) to develop recommendations for screening for cancer which was later reviewed by him and published
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An individual is defined as being evil when he or she is being morally wrong or bad‚ and their actions are to be described as being wicked. However‚ in a cultural or religious aspect‚ one would declare that stealing and/or murder are wrong‚ likewise forbids idolatry and blasphemy. In “The Cask of Amontillado”‚ published by Edgar Allan Poe‚ the narrator goes through certain discomforts‚ like being insulted in a way of that hurts his pride. Throughout the text‚ the narrator with goes through stressful
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The internet still remains in it’s infancy. With it’s limitation of possibilities drifting further and further from the grasp of it’s creators every day‚ it becomes hard to decide how such a vast public domain should be regimented. The difficulty with effectively approaching such a matter lies in the fact of the internet’s availability to almost every living soul throughout the modern world. Like it or not‚ everyone that has internet access can obtain a good look into the private lives of others
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These 3 known and unified forces are the Strong Nuclear Force‚ the Weak Nuclear Force‚ and the Electro-Magnetic Force can be merged into a single force at the grand unification energy of 1016 GeV. However‚ this model of the universe is not complete since Gravity is still impossible to unify with the 3 other forces. In 1687‚ Isaac Newton postulated the first model explaining gravity between astronomical objects and showed how it’s was inversely proportional to the square of the distance between two
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remained on the viewing screen. It was paused and coded when a gender role scene was portrayed. Moreover‚ the movie was either played back or fast forwarded with routine breaks to prevent missing important data. During some repeated viewing however‚ the researcher matches the variables to the measures and coded on a coding sheet‚ print screen the movie‚ and analyze on it based on the unit of analysis and coding categories. Each time a new characteristic was exhibited or there was a change to a new
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Euripedes’ Medea is often regarding as one of the most groundbreaking and innovative Greek tragedies. Elements such as feminine power and familial betrayal shocked the audience when the play was performed‚ as Greeks were used to a common threads of male authority and innocence of children within their plays. Euripides chooses to craft his female protagonist as someone who defies gender roles‚ acts in a more masculine way‚ is a feared outsider‚ and shows integrity. This alone would have been considered
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The argument makes indefensible and unjustified assumptions regarding the reduction of audiences of Super-Screen production movies. Taken as a whole‚ these unwarranted assumptions deliver a highly distrusted assertion. Indeed‚ if these unstated assumptions do not hold true‚ the argument entirely collapses. The argument puts its assertions according to an unaddressed report‚ the validity of which is not justified. It is not obvious whether the report truly represents the society. In statistical terms
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Book Banning Ethics The controversial topic of banning books has been considered in nearly every high school in America. Some schools actually are banning certain books in the current curriculum that are considered to be offensive to some people. Dr. Wes Scroggins‚ author of a document presented to the Republic School Board concerning context of textbooks and other curricular material‚ goes as far as to say that “requiring children to be exposed to this content at school is immoral. It is an abomination
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Limiting the usage of cars has personal and professional support all across the globe and yet it has yet to be embraced everywhere. Statistical proof show where it may help and real life examples of some of the effects of reducing‚ or getting rid of altogether‚ cars in one’s daily life. While “recent studies suggest that Americans are buying fewer cars‚ driving less and getting fewer licenses as each year goes by” (Source 4)‚ is that really enough or for the right reason? There are plenty
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