Extraction and Sublimation Experiment #4 10/02/13 Introduction Caffeine is a stimulant found in tea‚ coffee‚ cocoa‚ OTC medication‚ and cola drinks.It stimulates the brain and the central nervous system‚ so that a person feels less tired and more alert. The purpose of this lab is to determine the amount of caffeine in tea. The major component of tea is cellulose which is a polymer of glucose. Materials Lab coat Goggles Graduated cylinder 1 tea bag (1.615g) 50 mL beaker Ice
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:___________ Chemistry Laboratory 101__ Date Submitted[1] :___________ Members[2]: Instructor’s Initials[3] :___________ 1. _____________________ 2. _____________________ 3. _____________________ 4. _____________________ Laboratory Report Sheet The Bunsen Burner Activity 1 Objectives:4 1. ________________________________________________________ 2. ________________________________________________________ 3. ________________________________________________________
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Introduction! ! The Michelson Interferometer is commonly used to determine the wavelength of light or measure very small distances. It was invented by Albert Abraham Michelson and is commonly used in optical interferometry‚ a branch of physics involving a family of techniques one could use to extract information about waves by superimposing them. ! ! The original application of the Michelson Interferometer was to the famous Michelson-Morley experiment in 1887. Prior to Einstein’s
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The Caffeine War can be defined as the rush to produce higher concentrations of caffeine to a captive audience‚ by the world’s producers of caffeine products. While there may be many forms of introducing caffeine to customers this report will focus on and compare the Coffee industry and the producers of Energy Drink products while attempting to define their impact and any resulting long term medical harm to the consumer. According to Dr. Howard Axe‚ President of the Chicago Medical society‚ his research
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Extraction of Caffeine from Tea Leaves Jaybee Balilea‚ Sharmaine Baysic‚ and Maria Anjelette Patricia Belen 3BIO7‚ Department of Biology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract Extraction is a technique for isolating and purifying organic substances. In this technique‚ a solution is combined thoroughly with a second solvent that is immiscible with the first solvent. The solute is extracted from one solvent into the other because it is more soluble in the second solvent
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cheese. Lactic acid bacteria(LAB)‚ a bacteria that can be found in the production of cheese‚ its stress gene was investigated in the experiment by using various biochemical and genetic techniques to identify and extract. The characterisation of the strain illustrates how identification of strains differ using different methods‚ such as gram stain and 16s rRNA screening. After the characterisation‚ the stress gene isolation assist the further understanding of the gene on LAB be giving different stress
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TITLE OF EXPERIMENT 2 : DILUTION 2.1: OBJECTIVES Upon completion of this experiment‚ students should be able to: 1. determine the concentration of coloured solution such as FeCl3 by using dilution and colour differentiating (colorimetric) techniques. 2.2: INTRODUCTION Concentration can be expressed in many different ways such as percentage volume and percentage weight etc. In laboratory‚ normally concentrations were expressed as molarity and normality. Molarity is the
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Caffeine is a drug that is used to improve mental alertness by stimulating the central nervous system [1]. It is an ingredient found in a various amount of products sold on the market today‚ such as coffee‚ tea‚ chocolate‚ soft drinks‚ and energy drinks. Caffeine can be taken by mouth or intravenously (by IV) to help alleviate breathing problems in infants and can even be used in combination with some pain killers to treat migraines after epidural anesthesia. Moreover‚ it can be helpful in preventing
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OLD COINS TURN TO GOLD DESIGN: Problem or Research Question: How does zinc effects the color change in a copper penny? Hypothesis: If copper and zinc comes together‚ then it will form brass‚ which gives gold color to copper penny. Variables: There were no variables at this experiment PROCEDURES: Materials: Zinc (SN) filling‚ 3M NaOH solution‚ Copper penny‚ tongs‚ Hot plate‚ 100 ml beaker‚ 250 ml beaker‚ Bunsen burner‚ Water‚ Spoon. Procedure: First‚ we turned on the hot plate.
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Lauren Sullivan Plants Imperfections Abstract The purpose of this experiment was to plant different crosses and observe the different phenotypic ratios the plants present. The procedure of this experiment was plant six different crosses and water them correctly so that we could observe the different phenotypes and compare them to Mendel’s proposed ratios. Mendel‚ who had studied peas‚ did a similar experiment and came up with specific ratios that a monohybrid and dihybrid cross should show. His
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