The Journey Devin was the last to leave the gym that night as usual. He walked out the old creaky gym and felt a gust of cold wind as he stepped onto the streets of inner city Chicago. He trudged his way home through the snow‚ while he was hindered by his bookbag which he knew he would never open. In the distance‚ he could hear the shrill hum of police sirens which he had long ago become accustomed to. His legs ached from the many hours he had spent in the gym that night. There was only three weeks
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of Caffeine from Lipton® Tea Leaves Nathaniel Camangon*‚ Kaila Bumagat‚ Franz Mari Burgos‚ Remigio Callanta Department of Chemistry‚ College of Science‚ University of Santo Tomas‚ Manila‚ Philippines Abstract This experiment mainly focuses on the extraction of pure caffeine by multiple extraction from commercially acquired tea leaves and determining its purity by melting point determination. A 0.02% yield of pure caffeine was obtained from 10.4978g of tea leaves (4 tea bags). The acquired
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medium polarity; it was further separated from water soluble compounds using a polar non-protic solvent‚ dichloromethane (CH2Cl2). Sublimation was then used for the purification of the targeted compound. Based from the data collected‚ 5.758g of tea leaves contains 3.96% caffeine. After the purification process‚ 0.2279g of caffeine was obtained from 0.4948g crude extract with 46.06% yield. Melting point determination was used to characterize the caffeine yielded. However‚ the melting point range of
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leading causes of inequality in the workforce between men and women: lack of paid leave for working mothers bearing children. Caroline strongly argues not only will paid leave strengthen family relationships and raise them out of or prevent destitiution‚ it will also result in equity for almost every individual in the workforce. Unfortunately‚ but not surpisingly‚ only eleven percent of the workforce has paid leave‚ those in which who are highly paid white men. Consequently‚ there is a significant
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know on Thursday 23 June 2016 UK held a referendum to decide whether the UK should leave or remain in the European Union. The EU is a political and economic partnership between 28 countries that started after World War. This with the theory that countries that trade together are more likely to avoid going to war with each other. In Britain 30 million people or 71.8% of the population turned out to vote. The leave vote won by 51.9% to 48.1% which has been labelled Brexit. The result was a shock to
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Abstract This work describes the extraction of caffeine from tea leaves to determine its % caffeine. The extraction process selectively dissolves one or more compounds in a mixture into an appropriate solvent. In this experiment‚ it was visible in the process wherein the components of the tea leaves were dissolved in two solvents‚ water and dichloromethane (DCM)‚ with DCM used for multiple extractions. The organic layer was evaporated and the determined % caffeine was 0.12%. Furthermore‚ the purified
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“CAN CACAO LEAVES KILL PESTS?” SUBMITTED BY: LOUIE ANNE C. DIVINAGRACIA SUBMITTED TO: MADEL F. VALENCIA I. INTRODUCTION A. Background of the study We all know that insects can be seen everywhere and the only way to prevent these insects are to use insecticides. For us‚ a house is a place of residence. It is usually a place in which an individual or a family can rest‚ store personal property‚ and prepare food in able for the house fulfils its function‚ we need to eliminate some
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neglect). The possible punishment is more severe if the member missed the movement on purpose. It’s not uncommon for Missing Movement to be charged in conjunction with AWOL or Desertion‚ depending on the circumstances. AWOL AWOL‚ or "Absent without Leave‚" is usually
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America has always been known as the land of oppurtunity‚and as a place to create a better life. However‚ one group in particular‚ the Puritans‚ had a specific reason to leave England and move to the New World. In the early eighteenth century‚ a rise in religious reform had spread in England‚ bringthing forth a popularity in Puritanism. Puritans were those who sought to reform politics and correct institutions. They critized Charles I and James I on how they neglected their nation‚ ignoring imperfections
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The book "Wayside school is Falling Down" is about a school with 30 floors and 1 class on each floor. on the 30th floor there is a rumor that the teacher on that floor‚ Mrs. Jewels is the meanest teacher in the world. In the book Mrs. Jewels would move one ear than the other‚ then stick out her tongue. These movements would cause the students to turn into apples. Mrs. Jewels would turn the students into an apple if they cried‚ got an answer wrong‚ or did something that she did not like. on day on
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