without causing harm to the specimen (2). Being classified as an indicator species‚ the Daphnia magna are extremely sensitive to changes to their marine environment‚ sometimes showing biological symptoms in response to toxicity exposure. (1). In this experiment‚ three Daphnia magna were treated with three different drugs to measure the change in their short-term cardiac function; ethanol‚ caffeine and nicotine. Ethanol‚ found in drinking alcohol is a
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Introduction: The marshmallow experiment is one of the best-known studies in psychology that was conducted in the late 1960’s by an Australian-born clinical psychologist Walter Mischel at Stanford University. Back then‚ the study tested over 600 nursery kids and this experiment has been existing and continuously conducted by researchers until now. The instruction was that the children could eat one marshmallow immediately or if they could wait they would receive two marshmallows later. The purpose
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In 1971‚ The Stanford Prision Experiment was performed in order to see behind two contrasting behaviors that humans can show in a power driven institution. The point was to understand aggressive behavior typically shown by guards or people in the position of power using it to hold reign over the prisoners who in turn respond with submissiveness‚ and see how this relates in real world situations. Achievement of conclusion was the information gathered by the role play of students in an exercise of
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Sulfa Drugs: Preparation of Sulfanilamide Introduction The purpose of this experiment is to prepare sulfanilamide from p-Acetamidobenzenesulfonyl chloride. This will be done using reflux‚ vacuum filtration‚ and melting point determination. Experiment Scheme6 Figure 1. Reaction equation.6 A hot water bath was prepared in a fume hood using a 250-mL beaker. 2.5 g of p-acetamidobenzenesulfonyl chloride was placed into a 50 mL Erlenmeyer flask and 11 mL of dilute ammonium hydroxide solution
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Extension of a Rubber Band – Experiment Apparatus: Retort stand (with clamp) Spring (with hook) Masses (50g) Meter ruler Setsquare Rubber Band Method: 1. Assemble apparatus as shown‚ making sure the meter ruler is absolutely vertical‚ and that the clamps of the retort stand are tightened enough to hold the apparatus in place. 2. Measure the initial length of the rubber band‚ without any masses on it to get a reading at 0g‚ using the setsquare (place vertically against the ruler and read off it from
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Title: What is the effect of concentration of acid on the rate of diffusion in agar blocks? Aim: To investigate how the concentration affects the rate of diffusion of hydrochloric acid through agar blocks Research Question: To determine how will different concentrations (0.1M‚ 0.2M‚ 0.3M‚ 0.4M‚ 0.5M) of hydrochloric acid affect the rate of diffusion of sodium chloride through agar blocks? Introduction-include prediction; information you have researched before Diffusion refers to the passive movement
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HOFLING HOSPITAL EXPERIMENT Hofling 1966 He wanted to see if nurses would follow orders given by an authority figure (Doctor) when the orders are given over the phone and would be breaking regulations. To study obedience in a real life setting. -The experiment involved public and private hospital wards. In Hospital ONE; 21 student nurses and 12 graduate nurses were asked to complete a questionnaire asking them what they would do if confronted by the experimental situation. This was to be the control
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turning into accidents. When the snow melts the road salt gets dissolved into the melted ice and snow and becomes a formula. This formula sinks into the land (soil mostly) and kills vegetation. The purpose for this exit project experiment is to find out what are the affects of road salt on plants. The reason for doing this lab is to find out what a certain concentration of road salt will have an affect on a specific type of plant. Also to see what changes will occur like the color
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Red Cabbage Indicator Aim – To create a pH indicator out of a red cabbage solution and to construct a basic pH scale to determine the pH of unknown solutions. Materials - • red cabbage leaves • 250 mL beaker • hotplate or Bunsen burner‚ tripod‚ gauze mat and bench mat • 10 test-tubes – equal size • test-tube rack Methods - Part A: Making the indicator 1. Tear up one or two red cabbage leaves‚ and place them in the beaker with enough water so that the cabbage is just covered. 2. Heat the beaker
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Measuring Cup Water Timer Tongs Observation/Question: Do all paper towels have the same absorbency? Are more expensive paper towels more absorbent? Hypothesis: I think more expensive paper towels are more absorbent than less expensive paper towels. Experiment: Controls: Same amount of water for each paper towel; same size paper towel used; the same surface used in each attempt; process to determine the amount of water left; the water will be left on the paper towel for the same amount of time; test
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