Determination of Caffeine in Tea Samples CONTENTS 1. 1. Introduction 2. 2. Theory 3. 3. Uses of Caffeine 4. 4. Effects of Caffeine 5. 5. Procedure 6. 6. Observations 7. 7. Result INTRODUCTION Tea is the most commonly and widely used soft beverage in the household. It acts as a stimulant for central nervous system and skeletal muscles. That is why tea removes fatigue‚ tiredness and headache. It also increases the capacity of thinking. It is also used for lowering body temperature
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------------------------------------------------- Isolation of Caffeine from Coffee Date of laboratory work: 10/9/2012 5:00-7:45 Date of report written: 10/15/2012 Introduction: The purpose is to isolate caffeine from coffee by using the organic solvent dichloromethane (CH2Cl2) that is also referred to as direct contact. Calcium carbonate (CaCO3) is used to remove the tannins from the coffee. Afterwards an extraction is used to separate the organic layer (bottom) from
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Introduction The aim of this experiment was to determine the effect of caffeine on resting body temperature. This has to do with homeostasis‚ which is the maintenance of equilibrium. In other words‚ it is a stable body state. Homeostasis refers to the process of keeping the internal body environment in a steady state‚ when the external environment is changed (Homeostasis 2). Humans are warm-blooded creatures that generate body heat internally and maintain body temperatures at a fairly constant level
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Description To investigate the effect on caffeine on heart rate of water fleas and to understand the risk of high level consumption of caffeine to the health of the human circulatory system and nervous system. Preview Diagram 1: Chemical structure of caffeine Image source: http://ismaastricht.wikispaces.com/file/list The images above show the chemical structure of caffeine which has a chemical formula of C8H10N4O2. Caffeine was named by the International Union of Pure and Applied Chemistry
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Introduction A. Attention Getter: If you drink some kind of caffeine on a daily basis or close to that often‚ please raise your hand. Those you without your hands raised make up a rare percentage of today’s Americans. An article published in the Chicago Tribune on October 19‚ 2011 by Julie Deardorff‚ stated that nearly 90% of Americans drink coffee on a regular basis. B. Relevance Statement: When asked if you drank coffee or another source of caffeine regularly‚ the majority of the class raised their hand
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TITLE: Caffeine PURPOSE: THESIS: I. Introduction: A. Attention Getter B. Preview: How many of you woke up this morning and had a cup of coffee‚ tea‚ or an energy drink? II. Body: A. 90% of people in the world use caffeine in one form or another. In the U.S. 80% of adults consume caffeine every day (FDA.GOV) . Caffeine whether it is consumed in a food or as medicine it changes the way your brain and body work and also changes how you behave and feel. Caffeine is a central
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Caffeine is a central nervous system stimulant of the methylxanthine class. It is one of the most worldwide consumed psychoactive substances and it is totally legal. The chemical name of caffeine is 1‚ 3‚ 7 – Trimethylpurine – 2‚ 6‚ - dione. Its molecular formula is C8H10N4O2 and it has a molecular mass of 194.19 g/mole. Caffeine is an odourless‚ white crystalline purine‚ a methylxanthine alkaloid‚ which is closely chemically related to adenine and guanine. Caffeine acts through multiple mechanisms
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Caffeine...Does it truly affect the body? Everyday millions of Americans go through cups of coffee a day and most people don’t even know how it affects your body. I am one of those people and I have always wondered what caffeine does to my body. This topic interest me a lot because I drink coffee on a daily about 2 times a day and I want to know if there are any short term effects and long term effects and if I should be worried about drinking too many drinks with caffeine in them. I want to find
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are the affects of stimulants like (Caffeine and Amphitemine) on the study and learning habits for college students? Caffeine is a central nervous system (CNS) stimulant with a charge that rise energy‚ mood‚ awareness‚ concentration‚ and wakefulness. Caffeine is the most widely used drug in the world. Caffeine can be found in teas‚ coffee‚ energy drink and chocolate caffeine is also very popular among student‚ as a supplement and as a study aid. Drinking caffeine can have many effects‚ both positive
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Caffeine Content of Foods and Drugs Product Serving Size 1 Caffeine (mg) 2 OTC Drugs NoDoz‚ maximum strength; Vivarin 1 tablet 200 Excedrin 2 tablets 130 NoDoz‚ regular strength 1 tablet 100 Anacin 2 tablets 64 Coffees Coffee‚ brewed 8 ounces 135 General Foods International Coffee‚ Orange Cappuccino 8 ounces 102 Coffee‚ instant 8 ounces 95 General Foods International Coffee‚ Cafe Vienna 8 ounces 90 Maxwell House Cappuccino‚ Mocha 8 ounces 60-65 General
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