To investigate the effect of different caffeine concentration on the heartbeat rate of Daphnia at room temperature. Introduction: Caffeine is found‚ and produced in many plant species to function as a natural pesticide‚ and as an inhibitor of seed germination of other nearby coffee seedlings to give it a better chance of survival. Caffeine is able to paralyze and kill certain insects upon feeding on the plants that produce caffeine. Coffee‚ tea and cocoa are common caffeine-containing
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Have you ever wondered how the planets orbit? Do you feel as if it goes in a full circle? Well one astronomer figured out that the planets do not move in a circular motion but in a motion called ellipses. The astronomer’s name is Johannes Kepler. Kepler came up with three laws of planetary motion. He created formulas to explain how long it would take for the planets to make a full revolution around the sun. But before we delve into the laws let’s start with the background of Johannes Kepler.
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several variables; one of the most notable variables is the temperature of the plant’s environment. Previous study has led me to conclude that when the temperature of the plants’ environment is low‚ the rate of photosynthesis is also low because the enzymes responsible for photosynthesis are not able to absorb as much heat energy and in turn will move slower. In contrast‚ if the temperature of the plant’s environment increases‚ the rate of photosynthesis will also increase because the enzymes and
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calculate the fraction that will be used up after 6.0 minutes. 4. [15 points] The rate law for the decomposition of ozone to molecular oxygen 3 O3 (g) −→ 3 O2 (g) is rate = k [O3 ]2 . [O2 ] The mechanism for this process is k1 O3 O + O2 k−1 k 2 O + O3 −→ 2 O2 Derive a rate law from these elementary steps. Clearly state the assumptions you use in the derivation. Explain why the rate decreases with increasing O2 concentration. 5. [15 points] Consider the following
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effect on the activity of the enzyme (catalase)? Theory The higher the substrate concentration the more quickly product is produced (rate of reaction increases) until enzyme saturation is reached at which time more substrate has no further effect. Enzymes such as Catalase are protein molecules which are found in living cells. They are used to speed up specific reactions in the cells. They are all very specific as each enzyme just performs one particular reaction. Catalase is an enzyme found
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Prem. Mid-shots and birds eye-view shots are the shots used to help the viewer establish this conflict. A birds-eye view shot is used in the opening scenes of the film to give the viewer a clue of the conflict between Prem and Jamal. The birds-eye view shot is of the set of “Who wants to be a millionaire‚” and also shows Jamal and Prem sitting face to face with just two monitors separating them. Seeing the stage through the scaffolding helps create the image that Jamal and Prem are enclosed and imprisoned
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Foreign Objects Found in the Human Body Ingestion‚ insertion and malpractice of foreign objects is a interesting topic among medical professionals for the past few years or more. It has been discussed in medical studies‚ such as emergency medicine‚ gastroenterology‚ urology and surgery. This essay would illustrate clinical studies from practice of deliberate ingestion‚ insertion or even malpractice of objects left behind in patients and then examines specific aspects of these behaviors that are
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Renaissance instruments‚ can be found at Iowa State University[->0]. The following answers are located in the articles. Read through the articles to answer each question: Which instrument looks like a snake? Serpent Which instrument is played by winding a crank? Hurdy-Gurdy Which instrument "is a loud reed-cap instrument with a double reed"? Rauschpfeife Which instrument has been called the most versatile of Renaissance wind instruments? The Zink Which instrument was an
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The Effect of Temperature on Solubility By Aviraj Singh Rogers 2 Background: The solubility of most solid substances is generally said to increase as the temperature of the solvent increases. However‚ some substances‚ such as ytterbium sulfate‚ do the opposite. This can be explained through the Second Law of Thermodynamics which states that “in all energy exchanges‚ if no energy enters or leaves the system‚ the potential energy of the state will always be less than that of the initial state”
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enzyme’s activity are temperature and pH‚ and each enzyme works best at a particular temperature and pH. The purpose of this enzyme kinetic experiment was to observe the effect of temperature and pH on the reaction of barley alpha-amylase enzyme with starch substrate and establish the optimum temperature and pH for this reaction. The optimum temperature and pH for the reaction of alpha-amylase and starch was predicted to be a temperature of 50°C and a pH of 5. The optimum temperature and pH for the reaction
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