Abstract The following experiment details the effect of different concentrations of catalase on the production of oxygen and water through the breakdown of Hydrogen Peroxide. In this experiment paper disc where coated in varying concentrations of catalase‚ 0‚ 25‚ 50 75 and 100%. The time taken for the disc to float between two markers on the side of a glass was then recorded. This experiment demonstrates that the higher the concentration of enzyme used the greater the production of oxygen on the
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synthesis of adipic acid via a greener oxidation reaction and a recyclable catalyst will be examined. This article will discuss how manipulating equivalents of 30% hydrogen peroxide (H2O2) affect the product yield. Results show product yield was affected when changing H2O2 equivalents. Equivalent ratio 1:4 (cyclohexene to H2O2) was most ideal‚ with an average yield of 27.37%. Understanding ideal greener approaches may help mediate the negative environmental impact. _______________________________________________________________
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Turkish Journal of Agriculture and Forestry http://journals.tubitak.gov.tr/agriculture/ Research Article Turk J Agric For (2014) 38: 55-61 © TÜBİTAK doi:10.3906/tar-1212-4 Oxidative stress and antioxidant defense mechanism in mung bean seedlings after lead and cadmium treatments Meher HASSAN‚ Simeen MANSOOR* Department of Genetics‚ University of Karachi‚ Karachi‚ Pakistan Received: 02.12.2012 Accepted: 25.05.2013 Published Online: 13.12.2013 Printed: 20.01.2014 Abstract:
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| | | |1 | | |Used liver and H2O2 |After H2O2 was placed‚ bubbles began to form very |Very fast reaction | | | |rapidly and began to rise quickly |4
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cells that break down hydrogen peroxide‚ a toxic substance into a harmless substance which is water and oxygen. Hydrogen peroxide (H2O2) is the by-product of many normal cellular respirations mainly in our body for it to function properly. However‚ H2O2 is a toxic substance that can be harmful for the body once it’s not processed properly. If the cell cannot break down H2O2 into a harmless substance such as water and hydrogen‚ we as the multicellular organism will be poisoned to death. For experiment
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Four environmental factors of enzymes were tested in lab. The changing of pH‚ substrate concentrations‚ temperature‚ and an inhibitor (NaCl) and the effects it hade on the enzyme turnip peroxidase. Enzymes are biological catalysts which increase reaction rates by lowering the activation energies of substrates. A substrate is a reactant that interacts with the enzyme. The enzyme and substrate can be viewed as the recently discovered "induced fit model"‚ which suggests enzymes are flexible and dynamic
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+ I2 in basic solution Write balanced equations for the following reactions: a. Cr(OH)3 + Br2 CrO42- + Br- in basic solution 10 OH- + 2 Cr(OH)3 + 3 Br2 2 CrO42- + 8 H2O + 6 Br- b. O2 + Sb H2O2 + SbO2- in basic solution 2 OH- + 2 Sb + 3 O2 + 2 H2O 2 SbO2- + 3 H2O2 c. HCOOH + MnO4- CO2 + Mn2+ in acidic solution 6 H+ + 2 MnO4- + 5 HCOOH 2 Mn2+ + 8 H2O + 5 CO2 d. ClO2- ClO2 + Cl- in acidic solution 5 ClO2- + 4 H+ 4 ClO2 + Cl- + 2 H2O Write the balanced
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peroxidase as the catalyst. Procedure: Lab Handout: Nishimura‚ R.T.; Giammanco‚ C.H.; Vosburg‚ D.A. J. Chem Educ. 2010‚ 87‚ 526-527. Discussion: Mechanism: Reaction 2 Vanillin H2O2 Divanillin 2 H2O Molar Mass 152.15g/mol 34.02g/mol 302.28g/mol 18.02g/mol Starting amount 100 mg .75mL N/A N/A Moles 6.75x10^-4 .032 Theoretical: 3.29x10^-4 N/A Final Mass N/A N/A Theoretical: 99mg (.099g)
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recrystallize it in order to obtain pure Zn(C5H7O2)2.H2O. To do this‚ prepare a solution of acetone and distilled water that contains 35 mL of acetone plus 15 mL of water and add 1 mL of acetylacetone to it. The acetylacetone serves to prevent decomposition of the product. Finally‚ add the precipitate to the solution and stir thoroughly. What is the appearance of the solution? Fit a long- or short-stem funnel with a piece of fine filter paper for a gravity filtration and filter the mixture. The
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catalase‚ making sure to close the stopcock after the catalase was dispensed in the flask. We then continued to collect data on a laptop. We used LoggerPro to collect and analyze the data. Data: H2O2 Concentration: Condition Initial Reaction Rate (kPa/sec) 0% 0.0009 1% 0.0777 2% 0.0888 3% 0.1395 H2O2 Volume: Initial Reaction Rate (kPa/sec) Condition 0mL 0.0288 1mL 0.1164 5mL 0.1420 10mL 0.1395 15mL 0.0498 20mL 0.0597 Temperature: Condition Initial Reaction Rate (kPa/sec) 5 0.1068 24 0.1395
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