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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1.0 TITLE Extraction of Phenol and Flavanoid compound of the edible brown seaweed species (Eucheuma Cottonii). 2.0 INTRODUCTION 2.1 An overview of Seaweed Macro-algae or “seaweeds” are multicellular plants growing in salt or fresh water. They belong to the lower plants‚ meaning that they do not have roots‚ stems and leaves. Instead they are composed of a thallus (leaf-like) and sometimes a stem and a foot (holdfast). Some species have gas-filled structures to provide buoyancy. They are often
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method for purifying liquids. Distillation is a common wet-chemical technique for separating organic compounds based on differences in boiling points. Upon heating a mixture of organic compounds‚ the more volatile compounds (those with the lowest boiling point) will vaporize first (i.e. be converted to gases)‚ leaving the higher-boiling compounds behind in the mixture. By isolating the vapor produced at different temperatures and condensing them (i.e.‚ converting gases to liquids)‚ you can effectively
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Acetone/Chloroform Liquid-Vapor Phase Diagram Abstract: Liquid-vapor phase of acetone/chloroform was studied through distilling a series of mixtures with different mole fraction. When the mixtures were boiling‚ their vapor was condensed through a water column and collected in a receiving container. Refractive index was collected for starting mixture‚ distillate and residue for each sample. A boiling temperature versus acetone’s mole fraction was constructed to show the liquid-vapor phase diagram
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Introduction: This experiment involves an extraction of a natural product using the techniques of steam distillation. The principle component of oil of cloves is an aromatic compound‚ which is identified by thin layer chromatography (TLC). Eugenol is widely used in dentistry‚ due to its analgesic‚ antiseptic balsamic qualities. It is ideal for curative for pulp hyperemia (the soft‚ sensitive substance underneath the enamel and dentine of a tooth) and pulp its. In dentistry eugenol is also used to
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Determining the accuracy of varieties of pipettes by weighing and finding the density of a liquid Abstract Different varieties of pipettes (P100‚ PR1000 pipettors and a serological pipette) along with a weighing balance was used in this investigation to check the density of an unknown liquid by first finding out what the liquid weighed and plotting a graph of the mass in grams against the volume of the liquid used in micro litres (µl) and finding the gradient of the graph (∆Y/∆X). Most of the standard
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November 5‚ 2014 Bioinformatics Leigh Ann Santana DNA Extraction Lab DNA extraction is an important process because the DNA first needs to be purified away from proteins and other cellular contaminants. Cell are needed‚ because that is where the DNA is located. Inside almost every cell in our bodies is a nucleus‚ and inside each nucleus is about two meters of DNA. The following steps are needed to purify DNA from a cheek swab. Collect cheek cells‚ Burst cells open to release DNA‚ separate DNA
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Extraction of Caffeine from Tea leaves Casinabe‚ Antonio Karlo‚*Catahay‚ Jesus Alfonso‚ Cerdena‚ O’neil‚ Cordova‚ Robelle Department of Biological Sciences‚ College of Science University of Santo Tomas‚ España Street‚ Manila 108 Group 4 2MB Date Submitted: December 13‚ 2012 ------------------------------------------------- ABSTRACT: The purpose of this experiment is to extract the amount of caffeine present in tea bags. In this experiment‚ isolation‚ characterization and purification
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OF DETTOL ANTISEPTIC LIQUID ON THE GROWTH OF E.COLI Background: Escherichia coli are rod shaped‚ gram negative bacteria often found in the gut of humans and other warm-blooded mammals (Jacques & Ngo‚ 2004). It is transmitted primarily through faecal contaminated food and water. Most strains of E. coli are not harmful to humans‚ however some strains are pathogenic and can cause symptoms including diarrhoea (Unknown‚ 2012). The active ingredient in Dettol Antiseptic Liquid is 4.8% chloroxylenol
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Connor Sims‚ Associate SUBJECT: Oil Drilling & Gas Extraction Industry in the US Analysis (21111) This report presents information regarding the industry‚ the primary operator of oil and gas field properties. The industry fuels its key buyers‚ the Natural Gas Distribution (22121) and the Petroleum Refining (32411) industries‚ with crude oil and natural gas. The industry continuously battles a shortage of available oil. In addition‚ many major oil fields have been in use for decades‚ slowly
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