Experiment 3: Isolation of Chlorophyll from Spinach and Chromatography Performed February 14th and 16th By Kyle Herzog Organic Chemistry 344 Section 807 Spring 2012 Objective: The purpose of the experiment is to extract pigments from spinach leaves and separate them by column and thin layer chromatography‚ determining Rf values for the pigments. Equations: Rf= Distance travelled by a given compound/Distance travelled by a solvent solution 1. Crude- 4.25/5.5= 0.773 2. Carotene-
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classification‚ of the various stages of mitosis by observing garlic root tips using a microscope. The study comes under the heading of cytogenetics which is the visual characterisation of genetic material and the study of how that material reacts during the life of the cell. Strictly speaking‚ mitosis is the division of the nucleus into two daughter nuclei that are identical to one another and to the parent nucleus. Mitosis is part of the cell cycle which also includes chromosome replication and division
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Prac 4 | Vertebrate Forelimbs‚ Shake a Leg! Ch. 6.4 H.Bio T.Book Aim: To gather information from secondary sources to observe‚ analyze and compare the structure of a range of vertebrate forelimbs. Materials: Pearson Biology Textbook coloured pencils Skeletons‚ photographs of a number of vertebrates copy of student worksheet Method: 1 Examine each of the vertebrate specimens in turn. Using Figure 1 as a guide‚ locate and identify the bones making up the pentadactyl limb structure
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constant speed AC motor‚ while the HP stage is driven by a variable speed DC motor. This feature allows variation of the intermediate pressure. Each stage is provided with its own dynamometer. At compressor’s inlet there is an airbox with a sharp-edged orifice for flow measurement. An intercooler is provided between the two stages‚ and an intercooler between the second stage and the pressure vessel. Connected to the pressure vessel is an exhaust pipe with a throttling valve and a calibrated flow
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Introduction The brain is one of the most complex machines to ever exist. Many experiments are conducted to try to learn more about the brain. Within the Bransford & Johnson experiment‚ their experiment focusing on the memory aspect of the brain. They focus on schema theory which was proposed by J. Piaget. Schema is the mental framework that helps interpret information by comparing new information to pre-existing knowledge. This study was conducted in 1972 by Bransford and Johnson. The aim of
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The Sims 3 is the third major title in the life simulation video game developed by The Sims Studio and published by Electronic Arts. It is the sequel to the best-selling computer game‚ The Sims 2. It was first released on June 2‚ 2009 simultaneously for OS X and Microsoft Windows – both versions on the same disc. The Sims 3 was released to game consoles and smartphones on October 26‚ 2010‚ for PlayStation 3‚ Wii‚ Xbox 360‚ Android‚ iOS‚ and Nintendo DS. The Windows Phone version was made available
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OBJECTIVES To demonstrate the effects that a bypass capacitor has on amplifier voltage gain (Av). To demonstrate the ac operation of the common-emitter (CE) amplifier. INTRODUCTION A common emitter amplifier is one of three basic single-stage bipolar-junction-transistor (BJT) amplifier topologies‚ typically used as a voltage amplifier. In this circuit the base terminal of the transistor serves as the input‚ the collector is the output‚ and the emitter is common to both. The input signal to a
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Hideout In Geylang Ah Ngow : I’m sorry Lou Foo. I should not have killed you. Chin: Can I be released now? I know that you are a good guy. Ah Ngow: Alright‚ but you better don’t report this to the police. ( unties the rope on Chin) Chin : I wont. Policewoman : Stop right there! Ah Ngow and Chin: Frozed Ah Ngow : Quickly grabs Chin and place a knife at his neck. Chin : What are you doing? ( surprised) An Ngow : Don’t worry. I wont kill you. It’s a trap for the police.( whispering in his
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included the tongs‚ large test tube‚ small test tube‚ evaporating dish‚ and blow torch. The data we found was that it turned blue after a period of time. The reaction was CoN- OH. The second station was very interesting. The procedure was to place 3 small drops of cobalt nitrate into a test tube in the rack. Place 6 drops of sodium hydroxide in the second test tube. Pour test tube into test tube one. Record the results. Dump the contents of the first tube into the filter funnel that has already
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water. The reason for this is because of density and how dense the cold water really is. That’s why when you put the cold water on top the molecules would want to sink towards the bottom of the jar which is basically the conclusion of Trial 2. Trial 3 I’m pretty sure that the green water will just drop completely into the yellow water. The conclusion did match my guess and the green water did quickly interact with the yellow water. Obviously the green water was much more dense than the yellow water
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