University of Illinois Urbana/Champaign ECE 445 – Senior Design Project Proposal LED Traffic Lights 4000 Adan Corral‚ Antonio Porto‚ Chris Brauweiler February 10th‚ 2010 Introduction: The advent of energy efficient LED traffic lights has produced an unforeseen problem in regions that experience freezing temperatures and snowfall during the winter months. LED traffic lights do not give off enough heat to combat snow accumulation
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Preparation and Recrystallisation of Aspirin Contents Page Synopsis iii 1 Introduction 1 1.1 Objective 1 1.2 Background 1 2 Theory 1 3 Procedure 2 3.1 Materials 2 3.2 Preparation 2 3.3 Recrystallisation 3 3.4 Determination of Melting Point 3 4 Results and Calculation 4 4.1 Mass 4 4.2 Percent yield 4 4.3 Melting Point 4 4.4 Appearance 4 5 Discussion 5
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little yellow tent to them. A lot of crystals were formed in the round bottom flask. The crystals were accidently dropped into the ice cold water forming a milky white substance‚ but this did not harm or contaminate the ending results. After vacuum filtration and being washed with the petroleum ether‚ the crystals turned pure white. Results and Discussion: The anticipated result of this experiment was to identify one of four conjugated dienes. The melting point of the adduct unknown was found
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with CPO and prevent numerous bubbles formed. Then‚ the mixture is heated until it reaches 150 °C and allows stirring vigorously for an hour until bleaching is completed. Filtration After bleaching is done‚ the spent adsorbent is separated from the bleached palm oil (BPO) by filtration using filter paper no.50. Filtration will be carried out in the oven at the temperature of 80 °C for a period of 22 hours. Once the BPO is filtered‚ the spent adsorbent is collected for regeneration. Soxhlet extraction
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play violent video games have lower belief in the use of nonviolent strategies and are less forgiving than players of nonviolent video games. According to a web‚ “Critics argue that these games desensitize players to violence‚ reward players for simulating violence‚ and teach children that violence is an acceptable way to resolve
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scheme of chemicals used. Table 1. Reagents used in procedure. Reagents Used Amount Used Butyl cyanoacetate (project #131) 2.12 g Aldehyde‚ 3‚5-Dichlorobenzaldehyde 2.66 g Piperidine 2 pipette drops Isopropanol (2-propanol) ~1.0 mL (filtration) Highlights & Observations: The 3‚5-Dichlorobenzaldehyde (2.12g) and Butyl cyanoacetate (2.66g) reagents were mixed into a tared vial with cap. A couple drops of piperidine were then added to the vial. The vial was then heated on a
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separate C10H8‚ NaCl and SiO2‚ and determine their percentages in the mixture. Since the mixture was not chemically combined‚ they can be separated by physical means. One can use a variety of techniques such as sublimation‚ selective dissolution‚ filtration or evaporation. As a result‚ the mixture contained 9.51% of C10H8‚ 16.2% of NaCl‚ and 60.40% SiO2. Introduction A mixture is a combination of two or more pure substances in which each substance retains its own composition and properties. One easily
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B) ml/min C) mM/sec D) mM/min 5) Which of the following is NOT a passive process? 5) _______ A) osmosis B) facilitated diffusion C) vesicular transport D) filtration 6) In this activity‚ the solutes were transported through the dialysis membrane by _______. 6) _______ A) simple diffusion B) osmosis C) active transport D) facilitated diffusion
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deals essentially with water. Tonicity is what makes the cells either shrink or grow depending on the environment it is placed at‚ it is an osmotic pressure and it is influenced by the different concentrations of solutes in and out of the cell. Filtration is what is used to remove solid particles and they can be removed by passing through a liquid and gas. The information above is very important because it is exactly what everything in this lab will be about. It explains in detail what every single
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spongy bone 16. Each of these reflexes is mediated by the brainstem except? Scratching 17. What type of collagen makes up the PDL? Type I collagen 18. Where is the majority of ECF located? Interstitial fluid 19. Where is the majority of the glomerular filtrate reabsorbed? Proximal tubule 20. What is sucrose made from? Glucose and fructose 21. Which of these causes increased secretion of bicarbonate from the pancrease? Secretin 22. Which of these diseases is characterized by patchy inflammation
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