Extraction of Caffeine from Thea sinensis Abstract Extraction of Caffeine from Thea sinensis main objective is to isolate‚ purify characterized caffeine from tea leaves. Sublimation technique was used to get the % yield which is 0.07%. The melting point of the standard caffeine with the sublimate is 229°C. Introduction The active ingredient that makes tea and coffee valuable to humans is caffeine. Caffeine is an alkaloid; a class of naturally occurring compounds containing nitrogen and
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Isolation of caffeine from tea leave Abstract:- Introduction:- Caffeine is probably the most commonly used addictive drug. This drug is found in a number of things ingested by people. It belongs to a group of nitrogen bases called purines. Because caffeine possesses these base-like properties‚ it is described as an alkaloid. They usually taste bitter and often are physiologically active in humans. The structure of caffeine is shown below. Figure 1: Structure of Caffeine In this experiment
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Extraction of Caffeine from Tea Leaves Introduction Caffeine is soluble in boiling water and as a result it is easily extracted from tea bags by steeping in hot water. This process leaves behind the water insoluble portions of the tea bag. However‚ water extracts more than just caffeine‚ so a final separation is done with an organic solvent that will dissolve primarily caffeine. The organic solvent used in this experiment is Dichloromethane (CH₂Cl₂). Dichloromethane is less polar than water
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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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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 caffeine was subjected to
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Caffeine Ruler Reaction Time Test * OBSERVATION/ASK QUESTION * INTRODUCTION/RESEARCH * HYPOTHESIS * EXPERIMENT/DATA * CONCLUSION Materials · Ruler · Paper · Pencil · Chart ::OBSERVATION:: Those drinking coffee appear to be more alert in class. Does drinking coffee improve mental and physical function? } } { { Can the effects of coffee alter coordination? ::HYPOTHESIS:: Caffeine improves your mental &
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Nelson Marlborough Institute of Technology Literature Review Caffeine & High-Intensity Power Out-Put Author: 10/16/2013 Diploma in Applied Fitness Exercise Science Table of Contents What are the effects of caffeine on power output during high-intensity performance? 1 Introduction The effect caffeine (CAFF) elicits on sustained endurance performance is well founded (Costill‚ Dalsky‚ & Fink‚ 1978; Graham‚ & Spriet‚ 1991; Trice‚ & Haymes‚ 1995; Erickson‚ Schwarzkoff
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Although alcohol is sometimes seen as a recreation‚ it is truly a deadly substance. To start‚ by prohibiting alcohol‚ it will prevent the physical symptoms of alcohol. Also‚ by making alcohol unauthorized for consumption‚ people will also be avoiding health problems. In addition‚alcohol contains hazerdous chemicals that are unhealthy towards humans.To add‚ alcohol also has a numerous amount of non-benefits toward human nutrients consumption. To sum up‚ by making alcohol unauthorized for consumption
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Andrew Aluko March 28‚ 2011 Sports and Nutrition Professor Saullo Alcohol and Athletics Alcohol‚ more specifically ethyl alcohol or ethanol‚ is a depressant that provides 7 kCal of energy per gram‚ and is the most abused drug for athletes and non-athletes in the United States. Prior to my research on alcohol‚ I assumed that alcohol abuse was not prevalent among college athletes‚ outside of the occasional partying that normal college students partake in as well. But according to Lifestyles
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Adolescent Alcohol Abuse: What Factors are Present? Over the years‚ many researchers have dedicated their time and energy to study adolescent alcohol abuse. They have found that there are many factors that contribute to adolescent alcohol abuse. These factors are psychological‚ environmental‚ social‚ and cultural. Not all of these factors play a part in every adolescent who abuses alcohol‚ but one of these factors is usually present. Psychological disorders have been found in both American
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