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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organizations. (7th ed.). Prentice-Hall. Conger‚ J. A.‚ & Kanungo‚ R. N. (1987). Toward a behavioral theory of charismatic leadership in organizational settings Conger‚ J. A.‚ Kanungo‚ R. N.‚ & Menon‚ S. T. (2000). Charismatic leadership and follower effects Fiol‚ C. (1999). Charismatic leadership: Strategies for effecting social change. Leadership Quarterly Howell‚ J. M.‚ & Shamir‚ B. (2005). The role of followers in the charismatic leadership process: Relationships and their consequences Meese‚ E
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My name is Gia McGee and I am a licensed Athletic trainer in 4 states; California‚ Georgia‚ New York and Florida. Since I was a little girl I always had dreams of becoming a doctor‚ It was not until my senior year of high school when I took a sports medicine class that I found out I wanted to become an Athletic trainer. Once it was time for me to begin college I decided to start off at a community college‚ I began at Jackson Community College‚ in Jackson MI after my first year I transferred to SVSU
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When you compare and contrast personal fitness trainers and strength and conditioning coaches to athletic trainers‚ you will learn that importance‚ versatility‚ and scope of the athletic profession. In my opinion‚ not only are they both certified in their field individual field of expertise; they provide a safe environment for their athletes. Personal trainers are health professionals who‚ their health and fitness needs. They design safe and effective exercise programs‚ and provide the guidance
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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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In this lab‚ caffeine was extracted from black tea‚ and green tea through a vacuum filtration‚ and a rotovap. The melting point of the sample of black tea was 219.12-236.05 ˚c‚ and for the green tea it was 176.22-227.6 ˚c. The % error of the melting point indicates how much error there was from the melting point taken experimentally. The % error of the melting point for black tea was 0.44%‚ and for green tea it is 3.15%.Since the theoretical melting point of caffeine is between 235-237 ˚c‚ we can
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Extraction of Caffeine from Tea Leaves Santos‚ Raphael‚ Samson‚ Nonia Carla‚ *Tabora‚ Brylle‚ Tan‚ Kate Michal Department of Biological Sciences‚ University of Santo Tomas‚ Manila‚ Philippines Abstract Tea leaves are natural products that are harvested from agriculture. Caffeine‚ on the other hand‚ is a stimulant that has been shown to speed up the time of reaction‚ increase alertness‚ and improve one’s concentration. What we did in this experiment was to extract the alkaloid caffeine content from
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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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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).
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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 with a standard caffeine. The Rf value
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