Extraction of Caffeine from Lipton® Tea Leaves Nathaniel Camangon*‚ Kaila Bumagat‚ Franz Mari Burgos‚ Remigio Callanta Department of Chemistry‚ College of Science‚ University of Santo Tomas‚ Manila‚ Philippines Abstract This experiment mainly focuses on the extraction of pure caffeine by multiple extraction from commercially acquired tea leaves and determining its purity by melting point determination. A 0.02% yield of pure caffeine was obtained from 10.4978g of tea leaves (4 tea bags).
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A diet rich in vegetables and fruits can lower blood pressure‚ reduce risk of heart disease and stroke‚ prevent some types of cancer‚ lower risk of eye and digestive problems‚ and have a positive effect upon blood sugar which can help keep appetite in check. Eat a variety of types and colors of produce in order to give your body the mix of nutrients it needs. Try dark leafy greens; brightly colored red‚ yellow and orange vegetables and fruits; and cooked tomatoes. There is compelling evidence
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Adriana Mitrelis Ms. Kettle English 12 H 13 November 2012 The song “Strange Fruit” was first exposed as a poem written by Abel Meeropol who may be better recognized under his alias‚ Lewis Allan. “Strange Fruit” was finalized in the late 1930s‚ the same time that African- Americans in the South were being lynched by white supremacist groups in the days of America’s post- Abolition movement. Throughout the movement‚ the stress on seeing no evil and hearing no evil at this time was strongly enforced
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Practical guide to detection and identification of Phytophthora Leaf blight A number of Phytophthora species cause leaf blight. These include: P. infestans on potato and tomato; P. palmivora on a large number of tropical fruit species including rubber‚ durian and macadamia; and P. colocasiae on taro. These blights on leaves are first seen as small flecks but within 3-5 days they expand to produce large lesions. Initially‚ infected tissue is water soaked but becomes necrotic (brown or black) in
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Title: Exotic Fruits Aims and Objectives * To investigate on the general trend of exotic fruits consumption among participants. * To inquire about the main exotic fruits on the local market and to find out the different types of exotic fruits. * To investigate on the nutritional content of exotic fruits. * To find out the different ways of cooking exotic fruits. * To compare: * How economic‚ exotic fruits are compared to imported fruits. * Their advantages and disadvantages
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10-03-11 Nowadays‚ people can easily obtain food from other countries. Some people may deliberate that exotic fruit and vegetables form developing countries are not reliable. However‚ in my opinion‚ to promote importing exotic fruit and vegetables from developing countries sounds a feasible idea. To begin with‚ the import of exotic fruit and vegetables can diminish the capital used on the study of food. Developed countries usually focus on tertiary industry. Resources devote on researching
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Isolation has a poor connotation attached to it because numerous people fear being alone. Society reinforces that notion by declaring that to be happy we need to be married‚ have kids‚ own a house and be social. Andrew Wyeth’s painting Wind from the Sea fights this common belief by portraying the beauty and simplicity of a remote location. In the painting‚ the curtain is being blown by the wind and beyond the window the only commodity you can see is the sky‚ the bit of snow that has not yet melted
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resultant solution diluted up to the mark with diluents to obtain 1000 μg/ml. Further stock solution was used to prepare plasma standards to construct the calibration curve. C. Pre-chromatographic isolation of baclofen from plasma Prior to chromatography‚ baclofen from plasma constituents was isolation by adding 0.25 ml of acetonitrile and approximately 25 mg of zinc sulphate crystals to 0.50 ml of plasma. The aged plasma was stored at - 250C. This plasma was thawed at room temperature and 0.50 ml
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Drosphila melanogaster (fruit flies) and set up genetic crosses in order to determine the pattern of inheritance of certain mutant traits. The traits for which we will examine the pattern of inheritance are apterous (wingless)‚ vestigial (crippled wings) or white eyes. These are all mutant strains. The normal condition (winged and red eyes) is referred to as the wild type strain. Objective: The intial cross mates homozygous mutant fruit flies with homozygous wild type fruit flies in order to produce
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How fruit juice went from health food to junk food For decades fruit juice has been seen as a healthy option. Then this week a primary school banned it after claims that it’s as bad for you as Coca-Cola. But how big a health risk does it pose? ’Fruit juice isn’t the same as intact fruit and it has as much sugar as many classical sugar drinks‚’ says medical researcher Susan Jebb. Photograph: Deborah Pendell/Getty Images/Flickr Open This week‚ it looked as if fruit juice might finally lose its
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