ways that could both help us and harm us? Truth be told‚ there is. Caffeine is renowned for being the world’s most widely consumed psychoactive drug‚ but it is also known for literally shaking up our bodies by affecting our nervous systems. The drug can be good for us in some ways‚ but also bad in other ways. This makes it tricky and debatable whether caffeine is more helpful or more harmful. Inside the neurotransmitter‚ caffeine causes receptors to receive more dopamine chemicals by blocking off
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Speech Outline Title: Caffeine Specific purpose: To inform my audience about the effects and health issues of caffeine. Thesis: Caffeine can have many different effects on the body depending on the amount of consumption. Introduction A. Attention Getter – How many of you here consider yourself caffeine addicts? How much soda do you drink a day? One bottle? Two cans? More? How about coffee? B. Thesis statement – Caffeine can have many different effects on the body depending on the amount
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Chemistry Investigatory Project To determine minimum amount of Bleaching Powder Required to disinfect different samples of Water. INDEX I. Introduction o Purification of Water o History of Water Purification o Bleaching Powder II. Experiment o Aim o Requirements o Theory o Procedure o Observations o Result o Precautions Introduction 98% of the Earth’s water is present in the oceans with an average salinity of 3.5%. The remainder of the
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Study of Water Purification Methods Water is the most essential component of life on Earth. In the United States‚ the average person uses about 75 gallons per day of freshwater. Most of this water is pre-treated in facilities and comes out of the tap clean and ready for drinking‚ a fact many take for granted. If you are camping and hiking you won’t always have access to this source of healthy‚ potable water. Unfortunately‚ many water sources in the wilderness include microorganisms‚ bacteria
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Experiment 55: A Separation and Purification Scheme The final lab report/procedure write-up will consist of the following: Report guide: 1. List the names‚ structures‚ and amounts of each compound in your mixture. 2. Draw a flow chart (like pg 687 in PLKE) showing how you separated and isolated your two compounds. Be sure to include the structures of the compounds at each step. 3. Write a procedure. This should include exactly how you performed your separation. It should have enough
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Extraction of caffeine from Lipton tea leaves Maria Gianna Beatrice L. Cancio*‚ Joe Mari Isabella B. Caringal‚ Rowena A. Chiang‚ Patricia Deanne del Valle Department of Biological Sciences‚ College of Science‚ University of Santo Tomas‚ España‚ Manila‚ Philippines Abstract Caffeine was extracted from Lipton tea leaves by multiple extraction techniques namely solid to liquid extraction and liquid to liquid extraction; the purification by sublimation and melting point determination. Three
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NANOTECHNOLOGY IN WATER PURIFICATION Introduction Nanotechnology is the manipulation of matter on a near-atomic scale to produce new structures‚ materials‚ and devices. This technology has the ability to transform many industries and to be applied in many ways to areas ranging from medicine to manufacturing. Research in nanoscale technologies is growing rapidly worldwide In the case of nanoscale materials‚ the uncertainties are great because the characteristics of nanoscle materials may be different
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amount of protein‚ and percent yield and an increasing trend for specific activity and fold purification. These trends come about naturally when performing multiple purification steps. To determine the success of each purification step‚ the more important factors to look at are the total activity units‚ total protein amount‚ and percent yield. Looking at our purification table (table 7) our purifications were not very successful. While our total protein followed the normal decreasing trend‚ as
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Nitration and Purification of Bromobenzene Abstract: An electrophilic aromatic substitution reaction was performed on bromobenzene with nitric acid producing both 2-bromonitrobenzene and 4-bromonitrobenzene. Products of the reaction were purified through multiple recrystallizations and column chromatography creating multiple crops of a yellow powder. The percent yield of products was determined to be 51%. The melting point of Crop 1 was found to be 110-115 °C‚ and Crop 2 was found to be 37-90
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Abstract: Caffeine‚ (C8 H10 N4 O2) a white‚ crystalline alkaloid known as a nervous system stimulant found commonly in tea leaves and coffee‚ can be extracted using the method of sublimation with the use of Methylene Chloride (CH2Cl2) and Sodium Hydroxide; both can repeatedly rinse the green (unroasted) coffee beans from the caffeine. Keywords: Caffeine‚ Methylene Chloride‚ Sodium Hydroxide‚ Anhydrous Sodium Sulfate I. Introduction Caffeine is an alkaloid of the methylxanthine family. Its chemical
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