Extraction 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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Isolation‚ purification and characterization of alkaloid caffeine from tea leaves Date Submitted: September 3‚ 2014 Abstract Caffeine is one of the main constituents of tea leaves. In this experiment‚ 0.0039 g of pure caffeine was isolated from tea leaves. This was done through solid-liquid extraction followed by multiple liquid-liquid extraction. Then crude material obtained was then purified by sublimation. The isolated caffeine was subjected to thin layer chromatography (TLC) together
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The effect of toothpaste to oral bacteria VS the effect of mouthwash to oral bacteria Problem: Bacteria in ones’ mouth causes many problems for oneself in the future. For example‚ gum diseases‚ bad breath‚ etc..‚ Toothpaste and mouthwash is promised to kill most of the bacteria in one’s mouth‚ but which is more effective at killing the bacteria and preventing future problems? This experiment and research is going to prove which is more effective at killing oral bacteria
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Extraction of Caffeine from Tea Leaves Department of Biological Sciences‚ College of Science University of Santo Tomas España‚ Manila‚ 1028 ABSTRACT: Caffeine is a white crystalline xanthine alkaloid that acts as a stimulant drug. Caffeine is found in varying quantities in the seeds‚ leaves‚ and fruit of some plants. It is most commonly consumed by humans in infusions extracted from the seed of the coffee plant and the leaves of the tea bush‚ as well as from various foods and drinks containing
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Character Education at Schools in Indonesia* Abstract One of the main arguments of curriculum renewal in Indonesia‚ focusing more on character building and integrated learning‚ is the escalating demand of curriculum adaptation to social phenomenon happening in the society‚ in this case juvenile delinquency (Kemendiknas‚ 2013). Curriculum 2006‚ known as KTSP‚ was regarded‚ besides outdated and overloaded‚ unable to negotiate such a social complexity. There has also been a debate in the society
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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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Extraction of Caffeine from Tealeaves Perez‚ Albert Solomon K.*; Quiambao‚ Marie Angela C;.Pascua‚ Hanna Harriette R.; Patricio‚ Maria Roxanne DC.; 2-Chemistry‚ Department of Chemistry‚ College of Science University of Santo Tomas España St.‚ 1015‚ Manila Abstract Caffeine is soluble in both water and organic solvents‚ solid-liquid extraction and liquid-liquid extraction were used in the experimentation process. Caffeine was extracted using hot water‚ however‚ due to its
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Date of experiment: September 3rd‚ 2013 Organic Chemistry II – CHLB330 Name: Symone MoxeyLab Partner: Lynden Cooper 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
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Abstract Purpose - To be able to create an improvised machine with the use of Technology. - To discuss about the group’s Investigatory Project and Product. - To site ways about the product’s effectiveness and advantages when it comes in sorting coins. Procedure Prepare all the needed materials in constructing or making the electronic coin sorter. Before doing anything ask a guardian or a professional for assistance or help especially for minors. Next is‚ measure the desired size of the
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Review Motivational Interviewing in improving oral hygiene behaviora review of literature with possible application in Periodontics H. Esther Nalini1‚ Punithavathy. R2 Abstract: Success in periodontal therapy is highly dependent upon the ability and willingness of the patient to maintain a good oral hygiene. There is a great need to increase the patient’s adherence to oral hygiene instructions‚ which requires changes in the patient’s behavior particularly to improve the long-term treatment success
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