Wh Mia Foust Mr. Dunlap Honor Chemistry‚ Per 7 December 21‚ 2010 Glow Sticks Since glow sticks have been invented‚ consumers have wondered how scientists are able to create these magical sticks of light. They work without producing heat. They don’t need a battery or a bulb‚ Magic? This “cool” light is called luminescence. Unlike incandescence‚ which is light from heat energy‚ luminescence can be emitted at normal or lower temperatures. There are several
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Surpassing the optimum temperature will result in a drop in enzyme activity. Materials: 6% hydrogen peroxide Liver suspension 10 test tubes 4 beakers Thermometers Measuring cylinders Test tube pegs Test tube rack Bunsen burner Tripod Gauze mat Ice cubes/refrigerated water Ruler Safety goggles Pipettes Method: 1. Set up equipment as follows: Beaker Temperature (˚C) 6% Hydrogen peroxide (mL) Liver suspension (mL) 1 10 3 2 10 3 3 10 3 4 37 10 3 5 50 10
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The effect of time on enzyme reaction. Abstract: In this lab investigation we will observe how the amount of hydrogen peroxide is affected by catalase over time. The enzyme was added to 10 mL’s of hydrogen peroxide and observed over time to determine the relation between time and enzyme activity. The hypothesis stated that as time increased substrate would decrease. Therefore I predicted that at 60 seconds‚ there would be the least amount of H2O2. The enzyme activity mirrored my predictions
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Investigating the effect of changing substrate concentration on the activity of the enzyme catalase The aim of this experiment is to examine how the concentration of a substrate (hydrogen peroxide) affects the rate of reaction of an enzyme catalyse (found in liver cells) Research Question: how does changing the concentration of the substrate affect the rate of reaction of the enzyme catalyse? Hypothesis: As the concentration of the substrate increases‚ so does the rate of reaction until the reaction
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Effect of Temperature ( C ͦ) on Enzyme Catalase Activity in potato Aim: To investigate the Effect of temperature (10‚ 37‚ 60) Celsius (C ͦ) on enzyme catalase activity in potato using 2% of hydrogen peroxide (H202) as the substrate measuring the height (cm) of oxygen gas (bubbles) and calculating the volume of oxygen bubbles produced (cm3) Introduction: Enzymes are biological catalysts that speed up metabolic reactions without being affected. They lower the activation energy needed to start
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inhibitor during the catalysis of the hydrogen peroxide into O2 and H2O. Introduction: We rely on oxygen to provide us with energy (ATP) and go through all the phases of aerobic respiration. However‚ oxygen can be harmful to humans and can cause problems if not carefully regulated. Our cells can create a great range of antioxidant enzymes to fight and control the dangerous hydrogen peroxide and catalase is one of them. Catalase can convert hydrogen peroxide into
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RCA Critical Cleaning Process This paper was especially prepared by Werner Kern‚ the inventor of the RCA clean. Introduction The manufacturing of a silicon integrated circuit (IC) requires 500-600 process steps‚ depending on the specific type of device. Most steps are performed as unit processes with the complete wafers before dicing them into individual chips. Approximately 30% of the steps are cleaning operations‚ which indicate the importance of cleaning and surface conditioning. The device
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[6] © UCLES 2009 0653/06/M/J/09 [Turn over 4 2 The teacher gives a student a piece of zinc and some dilute hydrochloric acid. The student uses the apparatus in Fig. 2.1 to investigate the speed of reaction of the zinc and hydrochloric acid. hydrogen measuring cylinder For Examiner’s Use zinc dilute hydrochloric acid 100 Fig. 2.1 • • • The student places 4 cm3 of the acid in a test-tube. He starts his clock. Every minute‚ he records in Fig. 2.2 the total volume of gas collected in the measuring
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Area process consists of both automated and manual activities. Small quantities of raw materials (such as hydrogen peroxide and parabens) are added manually‚ while the addition of larger quantities is automated. Hydrogen Peroxide is often added to the R-10 Tank (via PR-1) tank in order to neutralize chlorine and provide anti-microbial protection. The use of Perone‚ common name Hydrogen Peroxide‚ is a corrosive substance that poses risk to the employees. Based on chemical splashing concerns‚ the hazard
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after a magnet. The spin was set to 700 rpm‚ and hydrogen peroxide was injected through a needle into the flask while spinning. Timing began as soon as the hydrogen peroxide was inserted. Once nine milliliters was reached timing stopped. The reaction flask was cleaned after every run. Materials: Concentrations: 100%‚ 70%‚ 50%‚ & 30%; (1) eudiometer‚ (1) Large beaker‚ (1) hose‚ (1) magnet‚ (1) flask‚ spinner‚ (1) needle containing hydrogen peroxide‚ and water Results: Table 1 Concentration
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