Experiment 11b: Isolation of Caffeine from a Tea Bag October 12‚2012 Purpose: The objective of this experiment is to extract caffeine from tea bags using the method of extraction. After the caffeine is extracted it is then compared to the nutritional facts amount per serving on the tea bags box. Supplies: Glassware: 1. 50.0 m L graduated cylinder 2. 150.0 mL beaker 3. 2-glass stirring rod 4. 6-test tubes 5. 2-glass pipettes 6. 2-50.0 mL Erlenmeyer flasks 7. glass funnel Hardware:
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Introduction In this experiment‚ the growth of four cultures‚ which are Escherichia coli‚ Staphylococcus aureus‚ Saccharomyces cerevisiae (yeast) and Penicillum (mold) were examined under a range of acidic to alkaline environments to determine the pH requirements of the four species. By conducting this methodology‚ the range of acceptable pH limits‚ including the optimum pH for each organism‚ can be determined. The range of pH over which an organism grows is defined by three cardinal points: the minimum
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In “The Medicine Bag” by Virginia Driving Hawk Sneve‚ Martin’s relationship with his grandfather changes from embarrassing to loving. In the beginning Martin was self-conscious about telling his friends the truth about his grandfather. His grandfather was Native American‚ but not your average Native American Indian from TV. Martin describes him as “He didn’t wear his hair in braids but hung in stringy‚ gray strands on his neck and he was old. He was our great grandfather‚ and he didn’t live in a
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Realization of Positive Politeness Strategies in Language in Terms of The Theory of Brown and Levinson (1987) Part one :Theoretical Background What is Politeness? We live in a world of language. The use of language is an integral part of our being human. We spend times and times of our lives talking-using language. We talk face to face‚ over the phone or even in our dreams. Our language is the source of our humanity and power. Yet‚ how should we use it? Hymes says: “how
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and reuse. One resource that is used thousands times a day and billion times a year is the plastic bag. Yes the plastic bag‚ the one that is at grocery stores‚ clothing stores and even restaurants. Several cities have even started to implement to some degree the plastic bag ban into their cities meaning the bags are banned from that city or there is a fine/ tax to use and purchase the plastic bags. This ban obviously has its supporters who agree with the ban and like the idea of reducing and banning
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8 Ways to Jazz up Your Solid Bag Fishing This week we look at 8 ways to jazz up your solid bag fishing‚ which essentially will lead to more bites on the bank. With angling becoming more and more popular the fish have seen it all so why not try out a few of these tips below to give yourself an edge over the generic solid bag angler. Use groundbaits or boilie crumb Using small crumb in your solid bags will get the fish grubbing on your spot for a much longer duration. Using cloudy groundbaits
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Thank you for the opportunity to offer our services to you. We hope that we can provide you with a satisfactory experience based on our previous years of collected knowledge. In this document we have included a report that summarizes the key points in this project. From what we can determine so far the main issues revolving around your construction project are unionized workers starting strikes and weather concerns during December. We are also informed that the company will suffer from a $500
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Extraction of caffeine from tea bags ABSTRACT Caffeine extraction from the commercial tea leaves (Lipton Yellow Label Tea) that was done is multiple extraction. 4 tea bags were used in the experiment; tea leaves were weighed having 8.5333 grams. The leaves were boiled in a beaker with 150ml of water; the aqueous tea extract was transferred in a seperatory funnel mixed with DCM (20ml)‚ done thrice. The DCM layer was washed with 20ml 6M NaOH in the seperatory funnel; the organic layer was dried
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Mice And Men - Tension (a) Steinbeck handles the mounting tension in a dramatic way‚ hinting at the fact that he deliberately wrote the novel to be easily adapted for the stage. Immediately before the start of the passage‚ we see Slim angrily rebuffing the suggestion that he has been with Curley’s wife‚ and Curley fearfully trying to appease him. This is so difficult for a man like Curley‚ proud‚ permanently tense‚ and feeling he has to prove himself‚ that his anger erupts when Carlson offers his
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Extracurricular Activities 1. Piggly Wiggly * Cashier * 30 hours per week * Part Time Job * April 2010 – present 2. Pre-Engineering Academy * Student/Member * 6 hours per week (after school for projects) * August 2010 – present 3. Best Robotics * Driver (at competitions it is my responsibility to control the robot’s movement) * 6 hours per week * August 2010 – present 4. Referee of Soccer * Referee * Usually only on weekends…
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