11 Glyoxalase System and Reactive Oxygen Species Detoxification System in Plant Abiotic Stress Response and Tolerance: An Intimate Relationship Mohammad Anwar Hossain1‚2‚ Jaime A. Teixeira da Silva1 and Masayuki Fujita1 1Laboratory of Plant Stress Responses‚ Department of Applied Biological Science‚ Faculty of Agriculture‚ Kagawa University 2Department of Genetics & Plant Breeding‚ Bangladesh Agricultural University 1Japan 2Bangladesh 1. Introduction Plants are sessile and sensitive
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I) INTRODUCTION * Industrial Chemistry deals with the preparation of products from raw materials through the agency of chemical change * Chemistry is important to Industry by: * Regulating manufacturing processes * Quality Control * Research and Development * Sources of raw materials from the natural environment 1) Lithosphere –Earth’s Crust 2) Hydrosphere – Marine and Oceanic Environment 3) Atmosphere – Air 4) Plants – Biosphere * Classification of Natural
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Goodrow General Biology Lab Mohawk Valley Community College 10/14/2014 6:00 PM Introduction: This experiment was conducted to examine the breakdown of substrate hydrogen peroxide (H2O2) by catalase‚ which is a specific enzyme that breaks down substrates of (H2O2). Molecules are in our bodies and nature. They move around constantly which causes them to be part of random collisions‚ which produce chemical reactions. This is actually needed to sustain life. These collisions
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hand of the equation the Cu has an oxidation number of 0 and on the side it has an oxidation number of +2. Since the copper ions increase in oxidation number‚ oxidation is taking place. Materials: 1. Reaction surface 2. Chemicals a. Cl2‚ KMnO4‚ H2O2‚ KIO3‚ K2Cr2O7‚ NaNO2‚ CuSO4‚ FeCl3‚ KI‚ starch‚ HCl‚ NaHSO3‚ Na2S2O3 3. Pipette for stirring chemicals in reaction 4. Pencil and paper 5. Safety goggles* Procedure: 1. Make a chart to record collected data from the experiment 2. Gather all necessary
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necessary to complete the following transformation. 7 A) 1. BH3·THF 2. H2O2‚ HOB) H2O‚ H2SO4 C) OsO4‚ H2O2 D) CH3CO3H E) 1. CH3CO3H 2. H+‚ H2O Answer: B 18) Draw the major organic product generated in the reaction below. Pay particular attention to regio- and stereochemical detail. Answer: 19) Provide the reagents necessary to complete the following transformation. A) 1. BH3·THF 2. H2O2‚ HOB) H2O‚ H2SO4 C) OsO4‚ H2O2 D) CH3CO3H 8 E) 1. CH3CO3H 2. H+‚ H2O Answer: A 20) Complete the following
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capability for detoxifying hydrogen peroxide and preventing the formation of carbon dioxide bubbles in the blood. This laboratory exercise involves the use of an enzyme that will react with hydrogen peroxide. The enzyme is catalase and hydrogen peroxide (H2O2) is the substrate. The reaction is as follows: catalase 2H2O2 2H2O + O2 Ingested hydrogen peroxide is a poison‚ while external use of this substance is not. However‚ the generation of oxygen gas requires careful
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energy graph which shows the possible shape of the curve for the uncatalyzed reaction. On the same graph‚ show a possible curve for the catalyzed reaction. Progress of Reaction 3. Consider the following mechanism: Step 1: Step 2: H2O2 + I- H2O + IO(slow) H2O2 + IO- H2O +
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Mean time taken for blue colour to appear = (131sec+135sec+145sec)/3 =137seconds Rate of reaction=n(I2)/t =(1.25*10-5mol/137sec) =9.12*10-8mols-1 [H2O2]: C1V1=C2V2 0.8*1=C2*99 C2=8.08*10-3M [I-]: C1V1= C2V2 0.025*10=C2*99 C2=2.53*10-3M [H30+]: C1V1= C2V2 0.36*35=C2*99 C2=0.127M [S2O32-]: C1V1= C2V2 0.0025*10=C2*99
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Mark Scheme (Results) Summer 2012 International GCSE Chemistry (4CH0) Paper 1C Science Double Award (4SC0) Paper 1C Edexcel Level 1/Level 2 Certificate Chemistry (KCH0) Paper 1C Science (Double Award) (KSC0) Paper 1C Edexcel and BTEC Qualifications Edexcel and BTEC qualifications come from Pearson‚ the world’s leading learning company. We provide a wide range of qualifications including academic‚ vocational‚ occupational and specific programmes for employers. For further information‚
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In this experiment the substrate is going to be hydrogen peroxide(H2O2) and the enzyme is going to be catalase. Hydrogen peroxide(H2O2) is a product of aerobic cellular respiration and is considered a free radical. This means that too much of hydrogen peroxide can affect the organelles. In order to stop damages caused by hydrogen peroxide‚ the enzyme catalase changes hydrogen peroxide(H2O2) to water(H2O) and oxygen gas(O2). Catalase is present most animal cells. The reaction
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