Kearney‚ Test results: SEGS LS-2 solar collector‚ Report of Sandia National Laboratories (SANDIA-94-1884)‚ 1994. SOLAR 94‚ 1994‚ pp. 147–150. Energy 60 (1) (1997) 49–59. [5] S.D. Odeh‚ G.L. Morrison‚ M. Behnia‚ Modelling of parabolic through direct steam generation solar collectors‚ Solar Energy 62 (6) (1998) 395–406. [8] J.A. Duffie‚ W.A. Beckman‚ Solar Engineering of Thermal Processes‚ second ed.‚ Wiley Interscience‚ New York‚ 1991 [9] F. Kreith‚ M.S. Bohn‚ Principles of Heat Transfer‚ sixth ed.‚
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Extraction of Caffeine from Lipton Yellow Label Teal Leaves Arlie Bamiano‚ Jealine Bernabe‚ Petrenne Caimbon*‚ Jhia Caso Department of Biology‚ University of Santo Tomas Abstract In order to extract pure caffeine from Lipton Yellow Label tea leaves‚ several extractions and phase transition techniques were employed to 6.5029 grams of sample. Initially‚ the tea leaves were boiled in water to extract tea from the leaves (Solid-Liquid Extraction). After extracting the tea‚ several steps of
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Abstract This work describes the extraction of caffeine from tea leaves to determine its % caffeine. The extraction process selectively dissolves one or more compounds in a mixture into an appropriate solvent. In this experiment‚ it was visible in the process wherein the components of the tea leaves were dissolved in two solvents‚ water and dichloromethane (DCM)‚ with DCM used for multiple extractions. The organic layer was evaporated and the determined % caffeine was 0.12%. Furthermore‚ the purified
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Extraction of Caffeine from Thea sinensis Abstract Extraction of Caffeine from Thea sinensis main objective is to isolate‚ purify characterized caffeine from tea leaves. Sublimation technique was used to get the % yield which is 0.07%. The melting point of the standard caffeine with the sublimate is 229°C. Introduction The active ingredient that makes tea and coffee valuable to humans is caffeine. Caffeine is an alkaloid; a class of naturally occurring compounds containing nitrogen and
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Extraction of Caffeine from Tea Leaves Introduction Caffeine is soluble in boiling water and as a result it is easily extracted from tea bags by steeping in hot water. This process leaves behind the water insoluble portions of the tea bag. However‚ water extracts more than just caffeine‚ so a final separation is done with an organic solvent that will dissolve primarily caffeine. The organic solvent used in this experiment is Dichloromethane (CH₂Cl₂). Dichloromethane is less polar than water
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Chem 253 - Organic Chemistry I Lab 10: Isolation of Identification of the major constituent of clove oil 3/15/2012 Purpose: The purpose of this lab was to isolate the cove oil from ground cloves and determine the identity of the major constituent that is known to have the molecular formula C10H12O2 through IR spectrometry. Theory: Many people search for alternative ways to treat illnesses other than the conventional use of drugs and surgery. These alternative ways include aromatherapy‚
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Fractional Distillation Name: Pinaki Das Partner’s Name: Alice Kim Course: Advance Science Grade 9 Slot: B Date: November 6th 2013 Fractional distillation separates a mixture of liquids based on differences in the boiling points of the liquid. The purpose of this experiment was to identify
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Fractional Distillation of GSM Blue Pamela Trix Lanaja‚ Jonathan M. Librojo‚ Shaun Therence Mabunay and Carissa Mae Magdaleno 3Bio3‚ Department of Biology‚College of Science‚ University of Santo Tomas‚ Manila‚ Philippines Abstract G.S.M. Blue is composed primarily of water‚ sugar cane alcohol with essences of juniper berries and other botanicals with traces of impurities and flavourings and it has 32.5 percent alcohol by volume (65 proof). The experiment aimed to separate its
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Extraction of Caffeine from Tea Leaves Department of Biological Sciences‚ College of Science University of Santo Tomas España‚ Manila‚ 1028 ABSTRACT: Caffeine is a white crystalline xanthine alkaloid that acts as a stimulant drug. Caffeine is found in varying quantities in the seeds‚ leaves‚ and fruit of some plants. It is most commonly consumed by humans in infusions extracted from the seed of the coffee plant and the leaves of the tea bush‚ as well as from various foods and drinks containing
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Simple Distillation Experimental Organic Chemistry: A Miniscale and Microscale Approach. 4th Edition. By Gilbert and Martin. Section: 4.4 Introduction: Distillation is a technique used to purify various liquids. In a simple distillation‚ a liquid is boiled and the vapors work through the apparatus until they reach the condenser where they are cooled and reliquified. Liquids are separated based upon their differences in boiling point in which each pure substance is at least greater than 40-50
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