The purpose of this experiment was to test the tonicity of potato cells. The potato cells were placed in different test tubes with water and were left there for 15 minutes. The percent change in mass is then used to determine if the cells lost or gained water‚ therefore determining the tonicity of the cell. Although it was a brief short time‚ the final results showed that the more water the potatoes were placed in‚ the more hypotonic the potato becomes. Tonicity is stated to be the state of a solution
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Is it normally acceptable to experiment on non-human animals to develop products and medicines that benefit human beings? New scientific research has cast grave doubt on the safety testing of hundreds of thousands of consumer products. Everyday products‚ from soft drinks to paints‚ contain numerous synthetic chemicals. Official assurances of the safety of these chemicals are based largely on animal experiments. But recent results from a consortium in America suggested such assurances may be worthless
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Brenda Richardson Intro. to Psych. Chapter 6 Part 2 Loftus Experiment Elizabeth Loftus‚ a psychologist and expert on memory‚ has conducted much research on human memories‚ real and imagined‚ and how that may happen. Loftus‚ personally‚ has experienced the misinformation effect and eyewitness memory. Even though there are several experiments outlined‚ I chose the ’Lost in the Mall’ experiment as more fitting to the sex abuse testimony she gave. Participants‚ twenty-four of them‚
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Section November 7‚ 2012 Abstract The effect of water and fertilizer on corn seedlings was examined. It was hypothesized before the experiment that enough water with sunlight and air should make the plants grow healthy. It has to do with photosynthesis. Fertilizer is also going to make the plants grow much faster; this is because of the nutrients in it. The experiment took about four to six weeks to complete; it took some days for the seed to germinate before planting. The corn was growing there were
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if this medicine cures the disease. All of these cases relate to decision making. We cannot reach a conclusion in these examples unless we have access to data. Data can be obtained from observational studies‚ experiments‚ or surveys. This article is devoted mainly to controlled experiments. However‚ it also explains observational studies and how they differ from surveys. Suppose two diets‚ Diet 1 and Diet 2‚ are being promoted by two different companies and each of these companies claims that
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Abstract An experiment is conducted to prepare soap and thus‚ to compare the properties of the prepared soap and synthetic detergents which are precipitation‚ emulsification and cleaning abilities. It can be concluded that soap has the properties if emulsifying oil whereas detergent has not. The abilities of forming precipitates can be seen clearly in soap solution whereas detergent forms no precipitates at all. The experiment is completed and successfully conducted. Introduction
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Experiment 9 Thin Layer Chromatography Experiment: 9 Title: Thin Layer Chromatography Introduction: Chemical analysis is conducted on specific analytes (specific substance of interest in a mixture)‚ however it is often found that these analytes must be separated for the chemical analysis to conduct their analysis. Chromatography is a set up of laboratory a technique that is used to separate a chemical mixture. This technique is very useful as it allows us to follow the course of
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Medicine in Sport (2008) 11‚ 6—19 REVIEW Heat stress and strain in exercise and sport John R. Brotherhood The University of Sydney‚ Exercise and Sport Science‚ Faculty of Health Sciences‚ Australia Received 3 May 2007 ; received in revised form 27 August 2007; accepted 28 August 2007 KEYWORDS Heat stress in sport; Exercise thermoregulation; Rational analysis of heat stress; WBGT; Risk assessment for exertional heat illness Summary Heat stress arising from the thermal environment is of
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Air Source Heat Pump Description and Operation: A heat pump is classified according to the source from which it extracts heat‚ i.e. the low temperature heat source. One that collects and utilises thermal energy from the outside air to heat the home and provide domestic hot water is called an air source heat pump. In an air source heat pump‚ outdoor air is drawn into the heat exchanger‚ which contains coils filled with a pressurised refrigerant gas. The refrigerant gas referred to here is
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Due to the warm weather conditions and the prolonged physical activity without water‚ it is easy to recognize that the player is experiencing extreme dehydration and is probably suffering from an exertional heat stroke. The biggest indicator that the player is having a heat stroke is due to the fact that he appears to be unconscious after having been what seemed to be extremely disoriented during the 50-yard sprints. Along with the flushed dry skin and the rapid shallow breaths‚ the victim may also
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