Experiment C: Identification and Separation of Dyes by TLC Pre-lab Properties: Ethyl acetate‚ ethanol‚ silica‚ azobenzene‚ azulene‚ 4-(p-nitrophenylazo) resorcinol‚ methyl red‚ bromocresol green (solubilities in water and ethanol) Purpose: To identify compounds from an unknown mixture using TLC Up to 100% of missed points can be recovered from this lab Watch the video: http://www.youtube.com/watch?v=e99nsCAsJrw (MIT) TLC plates are near the main hood DO NOT BREAK CAPILLARY TUBES Keep spots small
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Describe the physiological approach to the study of the mind. Explain how Donders experiment can be repeated in a modern laboratory using the physiological approach to the study of the mind Donder’s work attempts to describe the processes going on in the mind‚ by analyzing cognitive activity into separate stages. Until Donder’s work‚ many scientists had assumed that the mental operations involved in responding to a stimulus occurred instantaneously. Donder was particularly interested in "timing
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Institute General Education Department City of Dasmariñas‚ Cavite‚ Philippines EXPERIMENT NO. 1 ARCHIMEDES PRINCIPLE ------------------------------------------------- Archimedes Principle ------------------------------------------------- Abstract: * ------------------------------------------------- Sophomore students from Occupational Therapy in De La Salle Health Sciences Institute had conducted an experiment concerning Archimedes’ Principle to determine the density of solids and liquids
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Title Experiment with a spiral spring (Oscillation) Objective 1. To show how the time of vertical oscillation depends on the load 2. To determine the spring constant 3. To determine the effective mass of the spring Introduction In this experiment‚ it is to show how the time of vertical oscillation depends on the load‚ to determine the spring constant and to determine the effective mass of the spring. An ideal spring is remarkable in the sense that
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Sometimes the data we need may not be available from internal or external sources. In such cases‚ we may have to obtain data by conducting our own survey or experiment. In a survey‚ we do not exercise any control over the factors when we collect information. For example‚ if we want to collect data on the money various families spent last month on clothes‚ we will ask each of the families included in the survey how much it spent last month on clothes. Then we will record this information. A survey
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Social Experiment Paper The Milgram’s Experiment The Milgram’s Experiment was conducted by Social psychology by the name of Stanley Milgram‚ he created this experiment on how being in the presents of an authority figures would affect the way people behaved. This study was conducted in July 1969‚ just one year after the trial of Eichmann in Jerusalem. Milgram developed this experiment to answer the question "Could it be that Eichmann and his millions
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Popcorn Experiment Experiment performed on 8/26/11 Biology 101 Introduction: “The oldest popcorn ever found was discovered in the “Bat Cave” of central New Mexico. Archaeologists found 80‚000-year-old corn pollen below Mexico City”. “The popcorn was thougt to be about 5‚600 years old”. (www.factmonster.com/spot/popcorn1.html) This particular pollen is almost identical to today’s popcorn pollen. Researchers came up with the theory that popcorn could have been a Stone Age snack for “cave
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Abstract The Tuskegee syphilis experiment was an infamous clinical study conducted between 1932-1972 in Macon Country‚ Alabama by the U.S Public Health Service. The purpose was to study the natural progression of untreated syphilis in rural African American men who thought they were receiving free health care from the U.S government; about four hundred African American men were denied. The doctors that were involved in this study had a shifted mindset; they were called “racist monsters”; “for
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unless otherwise specified 1. An experiment was run to examine the amount of time it takes to boil a given amount of water on the four different burners of her stove‚ and with 0‚ 2‚ 4‚ or 6 teaspoons of water. The numbers in parentheses are run order. The results of the design are given below. Salt (teaspoons) Burner 0 2 4 6 Right Back 7(7) 4(13) 7(24) 5(15) 8(21) 7(25) 7(34) 7(33) 7(30) 7(26) 7(41) 7(37) Right Front 4(6) 4(36) 4(1) 4(28) 4(20) 5(44) 4(14)
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molecules across a semi permeable membrane is based on the size of the molecule Variables: a) Manipulated : Size of solute molecules b) Responding : Colour of solution c) Fixed : Temperature and time Materials : Iodine solution‚ Benedict’s solution‚ 1% starch suspension‚ 30% glucose solution and distilled water Apparatus : A Visking tube‚ cotton thread‚ test tubes‚ beaker and water bath Procedure - Soak the Visking tube in water for 5 minutes to soften it. Open the Visking tube and tie one
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