Extraction and Sublimation of Caffeine from Tea Leaves By: Ashley Barnes CH 236 – P8 Experiment 4 & 4.5 Due: 10/15/2014 Table 1. Table of Reagents Discussion The extraction yield refers to the percent of caffeine in the tea leaves at start of the extraction experiment. Tea leaves had 0.55 grams of mass per eight ounce serving. The weight of the extracted crude caffeine was 0.264 grams. Therefore‚ the extraction yield was 48%. This means that we pulled out almost half of the caffeine
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Extraction (Ch # 07) Faraz Gohar Mr. Wayne Xie Chem 201 10/02/2012 Objectives : 1)To purify samples of organic compounds that are solids at room temperature. 2)To dissociate the impure sample in the minimum amount of an appropriate hot solvent Chemical Index : Naphthalene; mp 82 *C 1‚4-Dichlorobenzene; mp 56 *C 4-Chloroaniline; mp 68 - 71 *C; pKb 4.15 Ethyl 4-Aminobenzoate; mp 90 *C; pKb 4.92 Procedure :
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Feasibility of Charcoal and Duhat (Syzygium cumini) as Alternative Whiteboard Marker Ink Acknowledgement The researchers would like to express their heartfelt gratitude to the following that helped them pursue this investigatory project: First of all‚ they would like to thank the Almighty for allowing this project to be possible. Through His guidance‚ the study was conducted and completed without any harm coming to them To their ever supportive
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DNA Extraction from Fruit 1. What was the purpose of adding liquid soap and salt in step #1 and how does NaCl contribute to maximum DNA extraction. The purpose of using soap was to destroy the membranes inside a kiwi cell. Soap helped with that because it dissolves the membranes easily. Salt or NaCl was used to remove proteins and carbohydrates. NaCl caused the proteins and carbohydrates to precipitate. 2. Why was it necessary to “mush” the kiwi by hand? If the step was omitted‚ what
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Mexicans‚ and Middle Eastern people. In the novel Ink by Sabrina Vouvoulias uses a somewhat dystopian future to showcase that the stereotype of viewing immigrants as less‚ is untrue by highlighting how hardworking each ink character is in terms of living their best life under such oppressive conditions. Throughout the novel Vouvoulias challenges stereotypes by showcasing the parallels in society. When Mari and Nely are taken by a group who captured inks and takes them across the border into Canada‚
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Extraction of DNA Molecule of an Onion In an Aqueous Solution By: Introduction DNA(deoxyribonucleic acid) is found in every living organism. It provides the information and instructions to build and regulate cells in organisms. The information it contains is used when organisms are being reproduced. It is made up of two polynucleotide chains known as DNA strands. Within the two chains there are four nucleotide units: adenine‚ thymine‚ cytosine‚ and guanine. Materials and Methods An onion
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2.3.3 Feature Extraction Feature extraction deals with the extraction of the distinctive features out of face images so that those face images can be differentiated among each other. There are several algorithms available for extracting features out of a face image. The most common is the use of mathematical formulas that generate a mathematical representation of a face image that is termed as a template‚ these templates are “the refined‚ processed and stored representation of the distinguishing
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Oil from Jackfruit Seeds In partial fulfillment of the requirement Research Submitted To: Mrs. Linda Mahomoc Submitted By: Lucy Mae R. Mendoza Chapter I Introduction Background of the Study Oil is a smooth‚ thick liquid that is used as a fuel and for making the parts of machines move smoothly. Oil is found underground. Oil has many uses. It helps the machines to work like vehicles‚ agricultural equipment and generators. Oil price hike is the
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the quantification of albumin and casein were performed and analyzed after extraction of the said proteins from their respective sources. Isolation of proteins was initiated by the breakage of the cell wall / membranes in three different ways. Homogenization of invertase‚ albumin and casein were achieved via grinding process‚ addition of 1M acetic acid and acidification by 0.1M hydrochloric acid correspondingly. Extraction of invertase and casein involved precipitation through the utilization of 95%
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Experiment 3 Liquid-Liquid Extraction Discussion The success of extracting each compound out of the solution can be seen in the IR graphs for each substance. For ethyl 4-aminobenzoate‚ the N-H‚ C=O and C-O are distinguishable in their proper wavenumber positions. The amino N-H stretch was found between 3224 cm-1 and 3423 cm-1. The C=O was found at 1681 cm-1 and the C-O was at 1280 cm-1. The IR for benzoic acid also displays its significant bonds‚ O-H and C=O. The O-H was between 2566 and
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