Extraction of caffeine from Lipton tea leaves Maria Gianna Beatrice L. Cancio*‚ Joe Mari Isabella B. Caringal‚ Rowena A. Chiang‚ Patricia Deanne del Valle Department of Biological Sciences‚ College of Science‚ University of Santo Tomas‚ España‚ Manila‚ Philippines Abstract Caffeine was extracted from Lipton tea leaves by multiple extraction techniques namely solid to liquid extraction and liquid to liquid extraction; the purification by sublimation and melting point determination. Three
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1111/j.1360-0443.2008.02430.x The global alcohol industry: an overview David H. Jernigan Department of Health‚ Behavior and Society‚ Johns Hopkins Bloomberg School of Public Health‚ Baltimore‚ MD‚ USA ABSTRACT Aims To describe the globalized sector of the alcoholic beverage industry‚ including its size‚ principal actors and activities. Methods Market research firms and business journalism are the primary sources for information about the global alcohol industry‚ and are used to profile the size
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TOPIC: ORGANIZATIONAL POLICIES REGARDING ALCOHOL AND SUBSTANCE ABUSE INDEX CHAPTER PAGE NO. ABSTRACT 2 1. INTRODUCTION 3-6 2.1. INTRODUCTION 3 2.2. Purpose of the Study 5 2.3. Background of the Organization 5 2.4. Research Objectives 5 2.5. Research Questions 6 2.6. Significance Of The Study 6 2. LITERATURE REVIEW 7-19 3.7. Review of Previous and Current Studies 7
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Extraction of caffeine from tea bags ABSTRACT Caffeine extraction from the commercial tea leaves (Lipton Yellow Label Tea) that was done is multiple extraction. 4 tea bags were used in the experiment; tea leaves were weighed having 8.5333 grams. The leaves were boiled in a beaker with 150ml of water; the aqueous tea extract was transferred in a seperatory funnel mixed with DCM (20ml)‚ done thrice. The DCM layer was washed with 20ml 6M NaOH in the seperatory funnel; the organic layer was dried
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Extraction of Caffeine from Tea Leaves Marc Tugaoen‚ Kristine Vanzuela‚ Rafael Villanueva‚ Justeen Wong Department of Chemistry‚ University of Santo Tomas‚ Manila‚ Philippines Abstract This experiment has been divided into 4 set-ups‚ first was the solid-liquid extraction‚ next was the liquid-liquid extraction‚ then the sublimation and last was the melting point determination. The solid-liquid and liquid-liquid extraction were both done during the first meeting‚ the DCM layer was filtered and
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To explain‚ my brother had a nicotine addiction from my family and is known clean from his habit. With this in mind‚ my baby brother smoking habits‚ between 15-16 years old. However‚ our parents were unknown to his habits. As matter of fact‚ I believe his nicotine habit came about when he moved out the house‚ at such a young age. Also‚ I believe his he picked up this habit‚ while living with his friend. Granted‚ our parents were both smokers and my mother stopped smoking in her thirties‚ but my father
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experiment to test on a new nicotine patch that would help smokers quit. This was announced in Director of National University‚ Professor Lo Fei Hong‚ office this morning. Instead of volunteers‚ a total of 800 patients who smoke and want to quit participate in the experiment. Evidence has shown that the patch may be more effective than nicotine gums which is designed to work the same way as people find the gum hard to chew or don’t use it in sufficient quantity. Nicotine is as addictive as cocaine
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percent of the caffeine molecule dissociates in water‚ proving that the compound is a weak electrolyte. A substance that completely dissociates in a solution‚ such as water‚ is considered an electrolyte and can therefore conduct electricity. This dissociation is caused by the atoms’ minimal nuclear charge‚ allowing the substance to break apart entirely into its ions. Ions are mobile‚ which induces a current and contributes to the substance’s high electrical conductivity. Caffeine is composed of atoms
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Abstract: Caffeine‚ (C8 H10 N4 O2) a white‚ crystalline alkaloid known as a nervous system stimulant found commonly in tea leaves and coffee‚ can be extracted using the method of sublimation with the use of Methylene Chloride (CH2Cl2) and Sodium Hydroxide; both can repeatedly rinse the green (unroasted) coffee beans from the caffeine. Keywords: Caffeine‚ Methylene Chloride‚ Sodium Hydroxide‚ Anhydrous Sodium Sulfate I. Introduction Caffeine is an alkaloid of the methylxanthine family. Its chemical
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Caffeine Concerns How many times have you felt a bit tired and decided to rely on an energy drink‚ a cup of coffee‚ or a can of cola to charge your body with caffeine and boost your energy levels to maximum? If your answer is “frequently” then you are on a precarious path to poor health. Not only does caffeine have numerous emotional side effects‚ it will also disrupt your sleep‚ and cause harm to your body. For all of its immediate benefits‚ caffeine is one of the most harmful substances in the
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