The AMES test also known as bacteria reversed mutation assay is used to evaluate the mutagenic properties of test articles. The test was first developed by Bruce Ames in 1974 (Krebsfaenger). The amino acid dependent strain of S. typhimurium and E. coli are used in this experiment where in the absence of the external histidine source‚ the cells cannot grow to form colonies. Specifically these strains of Salmonella are defective in 1.) Repair of mutations (uvrB) and 2.) A rfa mutation (eliminating
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for science IV Investigatory Project Putting toothpaste in a test Submitted by: Magtoto‚ Zyrene F. Carolina‚ Ma. Alysa D. Jacob‚ Katherine Janice R. Submitted to: Mrs. Barbara Nalus 2013 Introduction Problem This study will answer the question: Which of the two toothpastes‚ Colgate or Sensodyne can remove different liquids stains better? Hypotheses Null Hypothesis : There is no difference between the effect of the two toothpastes
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Objectives: 1. List and briefly explain the elements in the control process 2. Explain how control charts are used to monitor a process‚ and the concepts that underlie their use 3. Use and interpret control charts 4. Perform run tests to check for nonrandomness in process output 5. Assess process capability * What is Quality Control? 6. A process that evaluates output relative to a standard and takes corrective action when output doesn’t meet standards
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ANOVA Test Paper This week Team C is looking to further our knowledge of hypothesis tests by testing for variances and simultaneously comparing the different means of gasoline to conclude if the populations sampled were equal or not. We will test whether the three sample are from populations with equal variances. This type of testing is called analysis of variance or ANOVA (Lind‚ Marchal‚ & Wathen‚ 2004). The ANOVA test can be conducted with the intent of giving families information on where the
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and Benedicts Soloution (heated) The test tube was heated for 5-6 minutes. After 2 minutes of making sure it was nothing was going to change after heating‚ it was clear that there was no change had occurred with the benedict’s solution. The benedicts solution stayed a light blue color when added to the strong starch solution‚ and continued to stay the same color after heated. This indicates no simple sugars present. 3 Weak starch‚ saliva‚ iodine The test tube was held underneath the armpit for
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Lab 1: Flame Test 11 Chemistry‚ university Preparation Conducted: September 20th‚ 2010 Purpose: To observe‚ and create a chart of the colours produced when solutions of known metal compounds are heated to high temperature. Question: What colours are produced when different metallic compounds are placed in a flame‚ and why this happens? Hypothesis/Prediction: Different salts will produce different colours when placed in a flame‚ due to the fact that each element has a different
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Flame Test Lab Question: When a compound is placed in the flame of a burner‚ what happens to the color of the flame? Hypothesis: When the compound is placed in the flame‚ the flame changes color depending on the chemical compound. When they’re heated‚ they gain energy and changed color sometimes. Safety Requirements for this Lab: Wear goggles at all times. If you want to remove them to write in your notebook you may sit at a table in the center of the room. When you sit down remove them
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Printing Guide Use this printing guide as a reference to print selected sections of this practice test. To print‚ click the PRINTER icon located along the top of the window and enter one of the following options in the PRINT RANGE section of the print dialog window: To Print Complete Practice Test Enter Print Range Options Click ALL radio button Click PAGES FROM radio button and enter pages 3 to 26 Click PAGES FROM radio button and enter pages 27 to 47 Click PAGES FROM radio button and enter pages
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vitamin cofactors‚ and affected individuals have significant nutritional deficiencies. Answer: A Topic: Concept 17.1 Skill: Knowledge The following questions refer to the following simple metabolic pathway: 2) According to Beadle and Tatum’s hypothesis‚ how many genes are necessary for this pathway? A) 0 B) 1 C) 2 D) 3 E) It cannot be determined from the pathway. Answer: C Topic: Concept 17.1 Skill: Comprehension 3) A mutation results in a defective enzyme A. Which of the following would be
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Sensory Test Method discrimination/Difference Test Ranking Scaling Consumer preference tests Difference tests Ranking Scaling Discrimination/Difference tests Difference tests are the simplest and most sensitive form of product testing They are used to determine: whether or not a difference in some specific attribute exists between two samples if one sample is preffered to another Hoewer‚ cannost be used to determine how large is the difference or preference between samples Application
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