Chapter 1 DNA‚ RNA‚ Historical Experiments & Structures Frederick Griffith Experiments with Streptococcus pneumoniae S. pneumoniae comes in two strains‚ smooth and rough strains S Smooth : Secrete a polysaccharide capsule; Protects bacterium from immune system of hosts; Produce smooth colonies on solid media. R Rough : Unable to form capsule; Produce colonies with a rough appearance. Griffith conducted experiments in 1928 using two strains of S. pneumoniae: type IIIS and type IIR : 1. Inject
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Design is that area of human experience‚ where skill and knowledge is concerned with man’s ability to mould the environment according to his material and spiritual needs. It is used to analyse and identify problems to find an appropriate solution. Designers have created all kind of functional designs to help improve people’s lives. They were interested in the nature of beauty‚ art‚ and taste and with the creation and appreciation of beauty. Although there are examples of pre-historic art‚ they
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UTAR FHSC1134 Inorganic Chemistry Trimester 3 Experiment 1 ________________________________________________________________________ Title: Investigating the Properties of Period 3 Oxides Aim: To examine the oxides of Period 3 elements and describe their structure and bonding. Introduction: Generally‚ there are oxides of metals and non-metals. Metals burn in oxygen to form basic oxides while non-metals form acidic oxides. Structurally‚ they are covalent or ionic compounds. You are to
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Environmental Science The Scientific Method Amber Steadham October 31‚ 2012 Abstract: We conducted several experiments using the Scientific Method. We made observations‚ recorded them and used our observations to propose a hypothesis. The experiments included chemical and physical reactions dealing with torn news paper‚ appearance of rock salt crystals‚ the appearance of sand‚ oil and water on plastic‚ and making iodine in water and mineral oil. We found that all these included four physical
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Design Rationale It is known that the acceleration due to gravity (or g) is approximately 9.8m/s2 [down] or -9.8m/s2 [up]. What we are trying to do is design an experiment to measure and confirm this value. Our plan was to drop an object from a reasonable height and use a ticker tape timer to measure the amount of time and distance travelled between each time. The weight of the object used would have to be heavy enough that it would not be affected by air resistance. For example‚ you shouldn’t use
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leaf liter‚ in pet food dishes‚ flower pots (have water)‚ and under stones and bricks. Live in moist and shaded areas. Objectives: * Observe various aspects of a terrestrial isopod * Conduct experiments examining the responses of isopods to various environmental factors * Design and conduct an investigation of animal behavior: will the Isopods prefer a normal wet environment or a wet environment with diluted vinegar? Hypothesis: The group hypothesis was that the isopods will
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The Bobo Experiment was performed in 1961 by Albert Bandura to try and prove that people‚ especially children‚ learn their social skills and behaviors from copying or mimicking adults in their lives rather than through heredity genes. Bandura wanted to show‚ by using aggressive and non-aggressive adult-actors‚ that a child would be apt to replicate and learn from the behavior of a trusted adult (Shuttleworth‚ M. 2008). These issues have been present for many years‚ even before the media used these
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the okay to do the experiment‚ I grabbed the girls and went to work. The experiment I picked was the conservation concept‚ where the idea that merely changing the appearance of objects does not necessarily change other key properties. In other words‚ just because I put the same amount of water in a bigger case‚ doesn’t change how much water there is. I predict that both the girls would fail at conservation concept‚ and always
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Dutcher 1 English 1013 10/18/10 In nineteen sixty-three‚ Stanley Milgram conducted an experiment on obedience to authority figures. It was a series of social psychology experiments which measured the willingness of the study participants to obey an authority figure who instructed them to perform acts that conflicted with their personal conscience and confronted them with emotional distress. The experiment resulted in twenty-six out of forty of the participants
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The effect of varying temperature on thee Rennin enzyme Abstract The purpose of this experiment was to see what affect different temperate had on the reaction rate of the enzyme rennin. The experiment was performed by placing test tubes filled with renin and milk into water bath which was heated or cooled to one of the temperatures trialed. The hypothesis justified because it found because it though data that the enzyme reacted faster with the 45° temperate because it was
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