EXPERIMENT 8 THIN LAYER CHROMATOGRAPHY AND MELTING POINT DETERMINATION: DETECTION OF CAFFEINE IN VARIOUS SAMPLES Additional Resources http://orgchem.colorado.edu/hndbksupport/TLC/TLC.html http://coffeefaq.com/caffaq.html Materials Needed TLC equipment: 1 5-cm x 8-cm TLC plate‚ 2 capillary micropipettes‚ TLC tank and lid‚ ruler‚ UV lamp Extraction Equipment: spatula‚ 2 small test tubes‚ Pasteur pipet and bulb Chemicals: caffeine‚ ethanol‚ dichloromethane‚ TLC solvent (5% acetic acid in ethyl acetate) Meltemp
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Rashmi Kc Mr.. Leahy Speech 1315-73001 Tue-Thurs 9.30am Informative speech March 3rd‚2015 INFORMATIVE SPEECH ABOUT CAFFEINE I. Introduction A. Attention Getter: How many of you are feeling to have a cup of coffee in this cold morning? I drink a lot of coffee‚ so I was wondering how that might affect my health. This inspired me to do some research on the subject‚ which made it the perfect topic on which to base my sample speech. It’s something
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SPEECH AND PRESENTATION OUTLINING General Purpose: Informal Specific Purpose: is on the topic of caffeine... its beneficial effects AND its negative effects. Statement: also to inform coffee users about coffee. Introduction I Open with impact: before you go to Starbucks store buy take and take a sip of your favorite coffee… A Wouldn’t you want to know a better about what you benefit and don’t out of your coffee? B I drink a lot of coffee‚ so I was wondering how that might affect my
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advantages of coffee‚ with some studies finding that coffee may be able to lessen the frequency of dementia or Alzheimer’s or even sort 2 diabetes‚ for instance. Coffee has higher caffeine content than tea‚ which means its levels of the stimulant may individuals with asthma by unwinding the lung’s aviation routes. Caffeine likewise helps in contracting veins in the cerebrum and lessening headaches‚ and frequently mitigates aftereffects in view of
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amount of caffeine that is allowed into these beverages (Cool‚ 2011). These drinks contain high levels of caffeine and other herbs that have ill effects on ones heart‚ along with high sodium and sugar levels that can adversely affect ones overall health. The FDA on should regulate the allowable caffeine content in these drinks and energy drinks should be prohibited for children under the
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Anza Thomas 10/24/2013 CHE 261 (KC) Dr . McAtee Lab : Extraction of Caffiene Purpose: the purpose of this experiment is to extract caffeine from tea using solvent extraction techinques. Reference: Williamson‚ K.; Minard‚ R.; Masters‚ K. Macroscale and Microscale Organic Experiments‚ 2007‚ p. 137 to 171. Procedure: In a 50 mL beaker place 15 mL of water‚ 2.0059 g of sodium carbonate‚ and a wooden boiling stick. Bring the water to a boil on the ceramic heating plate. Remove the beaker
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Walter Brodner Prof. Geerling ENC1101 5 February 2013 Energy Drinks: Liquid Meth? Over the last decade‚ drinks containing high amounts of caffeine‚ sugar‚ and other ingredients that increase energy have been rapidly growing in popularity. Clearly these beverages are known as energy drinks. Energy drinks have gotten so popular that it is extremely rare to find a convenience store that doesn’t sell a variety of them. Students use energy drinks to cram the night before a test‚ athletes use them
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Solid-liquid extraction and liquid-liquid extraction of caffeine from tea leaves Andrew Jensen Lab partners: Jamie Pawluk‚ Joe Luong 230105559 Chem 250 L2 Oct‚4‚2012 Introduction: Extraction is the experimental procedure of obtaining a desired compound with the use of a solvent from either a liquid or solid mixture. Solid-liquid extraction involves the removal of organic compounds from solid material. This method of extraction may be achieved through extraction of the organic compound
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Energy drinks contain most of the same major ingredients caffeine‚ taurine‚ glucronolactone‚ niacin and panax ginseng just to list a few. Let’s start with caffeine it is a central nervous system stimulant that has the effect of temporarily warding off drowsiness and restoring alertness. As of studies done by (Lovett‚ Richard) 90% of adults consume caffeine daily in different ways. Most of the energy from these drinks comes from the sugar and caffeine not the unnecessary extras (Suzanne Farrell MS‚ RD)
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References: Brian‚ C. (2012‚ March 19). Advantages and disadvantages of caffeine in coffee. Retrieved from http://www.ask.com/explore/advantages-disadvantages-caffeine-coffee-5673 David‚ N. (2013). Drugs science. Cannabis. Retrieved from http://www.drugscience.org.uk/drugs-info/cannabis/ David‚ N. (2013). Drugs science. Psilocybin mushrooms. Retrieved from http://www
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