between the mobile and stationary phases. Subtle differences in a compound’s partition coefficient result in differential retention on the stationary phase and thus affect the separation. Thin layer chromatography (TLC) is a chromatographic technique that we use to separate the components of a mixture using a thin stationary phase such as silica plate supported by an inert backing. It applies mainly in medical‚ biological‚ chemical and pharmaceutical sciences because it is easy to be done and saves
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Thin Layer Chromatography Submitted in partial fulfillment of the requirements for: CHE 324 Organic Chemistry Laboratory Dr. Robert Duncan Fall Semester 2012 Caitlin Inman‚ Team Leader October 9‚ 2012 Tyler Byrd‚ Data Collection Shared Role‚ Technique Expert Introduction: “Chromatography is used to separate components of a mixture. For example‚ imagine a mixture of wood pieces‚ pebbles‚ and large rocks to be separated and the chromatography setup as a stream. Flowing water
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Jon Krakauer‚ the author of the novel Into Thin Air‚ starts the novel out of chronological order. The first three chapters take place in the future. Krakauer uses a different approach on the start of his novel than most authors. The novel begins when Krakauer reaches the top of the mountain‚ which is a bit anticlimactic. For a task as rewarding and treacherous as climbing Mount Everest‚ beginning the story at the climax confuses the reader. However‚ this allows the reader to realize that the climax
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Book Arrangement Jon Krakauer begins Into Thin Air with a dedication page that displays the names of everyone on Rob Hall’s (the team leader) team who perished during the climb. Following the dedication page‚ there is an epigraph that suggests the theme of the book: theme here. Krakauer then gives an introduction in which he explains how he compiled the book and how the climb impacted his life. The book also contains several pictures that Scott Fischer (another team leader) took while climbing‚
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Dying To Be Thin “An estimated 8 million Americans have eating disorders.” Anorexia nervosa (anorexia) is a serious eating disorder that causes people to often drop “below 85 percent” of their body weight (Graves‚ “Chapter One”). Anorexia is about perception‚ what victims see in the mirror is someone who is “fat”. Anorexia can cause serious health problems; although‚ it can be cured. To understand the terrible disease anorexia one must understand what causes it‚ the effects it has on the mind‚
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It was concluded that the product created was paracetamol when a thin layer chromatography test was performed and observed under ultraviolet light (which is discussed further down the page). An unknown substance was treated with acetic anhydrate and resulted with paracetamol. A compound that behaves in this matter is 4-aminophenol and is widespread in the industrial production of this drug. Upon these observations was the build up of “Chemical A” decided. When 4-aminophenol is t treated with
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“The Thin Blue Line” While preparing a documentary about Dr. James Grigson‚ Errol Morris unearths the story of Randall Adams and David Harris. One fateful day‚ Adams’ car runs out of gas on the side of the road in Dallas‚ Texas. That same day‚ after running away from home‚ stealing a car‚ and his father’s gun‚ Harris drove his car through Dallas. Then he comes across Adams walking to get gas for his car. Harris helps Adams and they spend the rest of the day together. That night‚ Officer Robert
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Arria Abnormal Psychology In watching the film “Dying to be thin” my understanding of anorexia was changed in a couple of ways. One way was that to be a dancer you are expected to be 15% below average body weight. This shocks me because the diagnostic criteria for being anorexic is being 15% below average body weight. Another aspect of anorexia that I did not know about is that the onset generally happens around the time of puberty. Treating eating disorders with a group of people with different
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In his book‚ Into Thin Air‚ Krakauer describes climbing to the summit of Mount Everest as a ’breathtaking experience’. The thinning of oxygen is just one of the many perilous events that unfolds while the climbing of this monster of a mountain. There are illnesses that one can get while descending too high too quickly‚ and limbs to be lost to the freezing cold. Worse‚ one could inevitably come to their own death by falling into a crevasse or for loss of air supply. There is no doubt that climbing
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Date:7.6.2013 Objectives: Part 1: (i)To learn the technique of TLC and the visualization of colourless components. (ii)Identify the unknown drug by a TCL comparison with standard components. Part2 :to learn the separation technique by using TLC plate in separating a mixture of compound by using spinach leaf. Apparatus:UV lamp‚capillary ‚250 ML beaker Materials:aspirin‚acetaminophen‚caffeine‚unknown A‚unknown B‚TLC plates‚ethyl acetate‚Hexane‚acetic acid‚iodine Introduction: Procedure:
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