was higher than the actual melting point of pure aspirin; 135°C. The phenol test showed that the product is not a pure aspirin by expressing purple color. TLC results weren’t high enough to conclude that the product was a pure aspirin. Overall‚ the lab wasn’t successful due to the low percentage of aspirin that were produced. Out of 2.0 grams of aspirin‚ only 0.7862 grams of pure aspirin were produced. So the percent yield was only 39%. Errors could be made during filtration process and the melting
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Presence of Alu element within PV92 on chromosome 18 in a mixed ethnical population and its connection with humans’ ancestral origins By Shiyu Song Biology 155Q LAB-A: 14:30-17:30 Dr. Jacob April 17th 2013 Abstract The Alu insertion (+) within PV92 on chromosome 16 usually reflects a person’s ancestral origin. This study aimed to find the correlation between the presences of Alu insertion (+) within PV92 on chromosome 16 within a population. We used PCR to detect the Alu insertions
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Hugh Kim Lab Report: Stoichiometry Lab 1. Prelab Part1. 1) Create no waste = The principle that encourages chemists to not create waste at the first place rather than cleaning it up afterwards effectively shifts the chemistry more environmentally conscious‚ as creating no waste would make the experiment efficient; the reactants will be reduced to only the essential ones and the product will be maximized‚ a change that would make the experiment economic. Also‚ if chemists aim to
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decomposition of hydrogen peroxide is related to the temperature then in high temperature it will speeds the decomposition of hydrogen peroxide. Materials ● Catalase ● Hydrogen peroxide 3% and 1% ● Forceps ● Filter paper discs ● Water ● Ice ● Water baths ● Vials ● Marking Pencils ● Stopwatch Procedure 1. Set up an ice bath (0°C)‚ a room temp water bath‚ a 37°C bath and a boiling water bath 2. Place 5 ml of catalase at 100 units/ml in each 4 test tubes. Place 1 test tube in each of the water baths 3. Place 40 ml 1% H2O2 in each 4 vials
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The temperature of water was determined by a thermometer. 1 cm stripped ends of the wires was hooked into the input posts on the back of the impendence converter. Lab tutor module was started after. B. Baseline heart rate The top of the container was covered with foil and the animal was allowed to sit quietly for 10 min. The trace was examined by pressing start. After that the baseline or the controlled
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distillation flask. 2. Add 23 stir bar 3. Make sure that the thermometer bulb is just below the Claisen Head‚ carefully. Be very gentle with the thermometers and take care not to break them. 4. Label 3 vials‚ 1‚2‚ and 3. 5. Place receiving vial 1 on ice to collect the distillate 6. Start the distillation by piling up hot sand around the distillation flask with a spatula 7. Adjust the sand so that distillation occurs at a rate of 2 drops per minute. 8. Record the temperature versus the number of drops
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I. Introduction: The purpose of this lab report is to differentiate between of Newton’s Third Law and Newton’s Second Law. Newton’s Third Law states that all forces come in pairs and that the two forces in a pair act on different objects and are equal in strength and opposite in direction. Newton’s Second Law states that the acceleration of an object is proportional to the net force and inversely proportional to the mass of the object being accelerated. Using calculation equations for acceleration
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Hypothesis- 1. The rate of reaction in the potato or liver will decrease when the temperature is increased. 2. The rate of reaction in the potato or liver will increase when the surface area is increased. Materials- • 100 mL graduated cylinder • Ice and water 250mL beaker (2) • Stirring Rod • 4 Test Tubes • Test Tube Clamp • Hot Plate • Potatoes • Timer • Test Tube Rack • Mortar and Pestle • Test Tube Brush • Tweezers • Ruler • Balance • Chicken Liver • Knife • Strainer
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Brand Preference for Fairness Creams By Dr. L. Manivannan M.B.A.‚ M.Phil.‚ Ph.D. Reader Dept. of Corporate Secretaryship‚ Erode Arts College Erode. Tamilnadu & Mr. K.V. Kannan M.B.A.‚ M.F.T. Faculty School of Management‚ Sri Krishna College of Engineering & Technology Kuniamuthur P.O.‚ Sugunapuram‚ Coimbatore & Mr. Natrayan M.B.A. Annamalai University Chidambaram Abstract Fairness creams have become a vital product for the Indian FMCG companies in increasing their overall
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Lab Report Quiz!!! | | | LabRepQuiz010 Question MC #19: All are true of the Materials and Methods section except___.Answer | | | | | | | | | | * Question 2 1 out of 1 points | | | LabRepQuiz010 Question MC #7: Which of the following is the best written sentence that includes the information below taken from an article written by Dr. Costanza‚ but avoids plagiarism? -A decade of research from Sunshine Health Clinic has shown that 20 minutes of exercise a day can
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