Formal Report on Exp 5 - 1412 Words

COLUMN AND THIN LAYER CHROMATOGRAPHY Mark Paul P. Pastrana, Mariah Ericka M. Patawaran, Princess Juneire M. Peligro, Francisco Q. Pua III, Rose Anne L. Quyo and Janille P. Ragpa Group 8 2B Medical Technology Organic Chemistry Laboratory ABSTRACT The main objectives were to separate the colored components of malunggay leaves by means of column chromatography, as well as to determine the purity of the components using thin layer chromatography (TLC) and measure the Rf values of the colored components obtained herein. For column chromatography, the sample prepared was loaded into a Pasteur pipette plugged with cotton and uniformly packed with silica gel. The eluents used were 7 mL hexane:acetone (7:3), 5 mL hexane:acetone (1:1), 5 mL†¦show more content†¦Without letting the column run dry, hexane:acetone (1:1) was introduced into the column, and in the same manner the eluates were collected. This was the same for the succeeding eluents, and went on until no more colored eluates could be obtained from the column. Cotton Cotton Silica gel Silica gel Pasteur pipette Pasteur pipette Iron clamp Iron clamp Iron stand Iron stand Figure 2 Column Chromatography 3. Thin Layer Chromatography The eluates obtained from column chromatography were applied on a TLC plate pre-coated with silica by spotting it seven times per color using a capillary tube. Each spot was dried before applying the next. A developing chamber was prepared by placing an amount of the solvent system, hexane:acetone (7:3), into a beaker. Filter paper was used to line the walls of the beaker, and was then covered with a watch glass to equilibrate the chamber. Once the filter paper was saturated with the solvent system, the TLC plate was carefully placed in the beaker to develop. When the solvent system had reached about a centimeter from the upper end of the TLC plate, the plate was removed, and before allowing it to air-dry, the solvent front was marked. Once air-dried, the plate was placed under a UV lamp to visualize the components to determine any additional colors that were invisible without UV light. Solvent system Solvent system Beaker Beaker Watch Glass Watch Glass Figure 3.1 Thin Layer Chromatography Figure 3.2 Thin LayerShow MoreRelatedClass Notes: Intermediate Accounting Chapter 31125 Words   |  5 Pagesout temp accts. 4 kinds of closing entries: 1) close out Revenue - debit Rev CR Income Summ (normal credit bal) (only exists long enough for closing entries) - companies may be closing hundreds of rev or exp accts 2) close out Expense accts - list every single acct DR Income Summ CR Exp accts 3) DR Income Summ CR Retained Earnings 4) DR Retained earnings - return of equity, has nothing to do with production (â€Å"Income† Summ does) CR Dividends (always has deb bal) Ex3-14: 1) DR RevenueRead MoreAccounting for Partnership Business Essay2574 Words   |  11 PagesTable of Contents Introduction 1 Sole trader 1 Partnership 2 Company 2 Registration Process 3 Financial Report 5 Conclusion 10 References 11 Introduction Christina Adams and David Ng recently completed their professional accounting qualifications, registered as tax agents and obtained all the necessary individual licenses as well as professional registrations required to operate as individuals. 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Hitler and the Appeasement Policy of the 1930s Essay

Appeasement Policy was a foreign policy that was adapted by Britain and France in the 1930’s towards Germany. Britain and France let Hitler have whatever they considered necessary to preserve peace in Europe, as they merely wanted to focus on domestic issues, such as economy and unemployment . They believed that Hitler had certain aims and that once he had achieved these, he would be satisfied. So they allowed him to re-arm, invade the Rhineland (1936), and complete the Anschluss of Austria (1938) followed by the Sudetenland. Appeasement assumed Hitler would keep his side of the bargain, however it did not. Adolf Hitler proves that he is ruthless, a risk taker, and anti-Semitist throughout the†¦show more content†¦On September 27th, 1938 the Policy of Appeasement between Adolf Hitler and Neville Chamberlain had been strained. Chamberlain had neither desire nor economic stance to be drawn into a costly war. He was unwilling to oppose Hitler as he had feared another â€Å"Great War† would come into effect. Furthermore he favored a policy of appeasement. Chamberlain believed Hitler was a reasonable leader and planned on giving him whatever Germany needed, so that he could be satisfied or appeased. Chamberlain believed that Hitler would keep his promises. As well Canada’s Prime Minister, Mackenzie King was also in favor of appeasement and believed that Hitler was a â€Å"sincere man who had no intention to provoke a war.† He too, agreed with Chamberlain that Hitler could soon be appeased. Mackenzie King and Neville Chamberlain had what they believed to be good reasons for supporting appeasement, however Adolf Hitler was nothing but a cruel, ruthless man that manipulated all the countries leaders as to believing that he was a sincere, reasonable leader. In 1938 Germany achieved success in annexing Austria and Northwest Czechoslovakia. Hitler’s success in united Austria was due to the appeasement policy that British Prime Minister, Neville Chamberlain had adapted. Afterward, just after theShow MoreRelatedNazi Soviet Pact And The Treaty Of Versailles1600 Words   |  7 PagesAlthough Hitler s ambitions and ideology fuelled his aggressive foreign policy, which hinted that a military conflict was bound during the 1930 s, the failure of the policy of appeasement was largely responsible for the outbreak of the war in 1939. The failure of appeasement allowed Hitler to attain resources and land. This kind of expansion is a direct contributor into forming a violent and widespread battle that began in 1939. However, the failure of appeasement was also directly related withRead MoreThe Policy Of Appeasement During The Outbreak Of War Essay1332 Words   |  6 PagesEvaluate the view that the policy of appeasement played a major role in the outbreak of war in Europe in 1939. 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It is clear that if the Western Powers had retaliated against Hitler, war could have been avoided, it encouraged Hitler, Hitler could never be appeased, and that it prompted the Nazi-SovietRead MorePolicy of Appeasement: Good or Bad? - Essay836 Words   |  4 PagesPolicy of Appeasement: Good or Bad? After the Great War, Germany and a couple other countries were greatly punished, having to pay reparations and territorial losses. Hitler, soon to be a dictator, wanted to change that. He believed that Germany had been punished too severely and wanted revenge; because he had such a strong government and military, there were many ways of going about stopping him. During the 1930’s, the policy of appeasement was the most effective response to Hitler’s aggressionRead MorePutzier 1. Tessa Putzier. Ms. Jeanne Bitz . Language Arts.1293 Words   |  6 Pages1 Tessa Putzier Ms. Jeanne Bitz Language Arts March 27, 2017 The Causes Of World War Two On June, 28 1919, the Treaty of Versailles was signed. This treaty coupled with other factors, such as the Nazis rise to power in Germany, Europe’s policy of appeasement, and Germany’s invasion of Poland would lead to - and be direct causes of - World War II. In fact, when French military commander Marshal Foch heard of the signing of the Treaty of Versailles, her observed with extreme accuracy - â€Å"This isRead MoreThe Munich Agreement And The Anglo German Declaration1035 Words   |  5 Pagesinevitable between the great European powers and allowed Hitler to gather more territory with relative ease. This document between the powers of Germany, Italy, France, and the United Kingdom outlined the terms and conditions under which Germany would annex a large portion of Czechoslovakia. Throughout this text, the historical context and significance of the Munich Agreement will be analyzed. The Munich Agreement was produced in hopes to stop Hitler; he was threatening to unleash war upon Europe if heRead MoreBritain s Policy Of Appeasement2028 Words   |  9 PagesBritain in the 1930s followed a policy of appeasement to retain peace between countries and stop the fascist powers of Italy and Germany causing disruption. There is a subsequent amount of evidence to suggest the policy of appeasement was a failure due to events including the Abyssinian Crisis, the Reoccupation of the Rhineland, The Anglo-German Naval Agreement, the Spanish Civil War and the Anschluss. Although it can also be argued that Britain had some success with preventing the fascist powersRead MoreThe League Of Nations Of The United States1400 Words   |  6 Pagescritical situation in Europe in the 1930’s. The policy of Appeasement, fascist ideologies throughout Germany and Italy and the Nazi-soviet Aggression pact were all, in their own respect responsible for the outbreak of war in 1939. 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Mobile Phones Have Improved Our Lives in Every Way Free Essays

MOBILE PHONES HAVE IMPROVED OUR LIVES IN EVERY WAY We live in the era of smart phones and not that smart people. Are mobile phones really necessary or are they just toys that think instead of us and help us escape from our boring lives? On one hand mobile phones are very beneficial. Thanks to all intelligent technological tools, you can call or text anyone you want, even if they are not close. We will write a custom essay sample on Mobile Phones Have Improved Our Lives in Every Way or any similar topic only for you Order Now You can call the emergency if you are stuck in an accident. In addition, one of the perks is definitely the internet access which you can reach wherever you are. Whether you are waiting for someone to come and are bored, you can listen to music. Nowadays you do not have to carry and agenda with you, because this sophisticated apparatuses remember all the appointments and reminders you might forget. On the other hand, you can easily get distracted by mobile phones, what sometimes can lead to obsessions. Not to mention the radiation and its consequences which cause infertility and many other health risks. Is it not sad when you meet and old friends of yours for a coffee and you both end up hanging on the mobile phones and become extremely anti-social? All in all, technological phenomenon of modern time are one of the greatest discoveries so far and our lives would never be the same if they did not exist, because they have made our lives easier in every single way. I believe that the benefits of using mobile phones outweigh the disadvantages, but only if the usage is under control. Therefore, we must not let them use us, we must use them! How to cite Mobile Phones Have Improved Our Lives in Every Way, Papers