INTRODUCTION Isolation of Aspergillus niger from garden soil for the production of amylase enzyme and effect of various parameters on enzyme‚ production is the main aim of this study. Enzymes are protein catalysts synthesized by living systems and are important in synthetic as well as degradative process. Amylases are starch degradative enzymes that catalyze the hydrolysis of internal a-1‚ 4-0-glycosidic bonds in polysaccharides such as starch in to simple sugar (glucose and maltose). It is produced
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Module 2.1: Biological Molecules * State the functions of biological molecules in organisms Carbohydrates – energy storage and supply‚ structure (in some organisms) Proteins – Structure‚ transport‚ enzymes‚ antibodies‚ most hormones Lipids – Membranes‚ energy supply‚ thermal insulation‚ protective layers/padding‚ electrical insulation in neurones‚ some hormones Vitamins and minerals – From parts of some larger molecules and take part in some metabolic reactions‚ some act as coenzymes or
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FREAR AND BURRELL-ASSIMILATION OF HYPONITRITE-NITROGEN tion of pyridine nucleotides by spinach grana and coupled carbon dioxide fixation. Nature 167: 768769. 1951. 29. VISHNIAC‚ W. and OCHOA‚ S. Fixation of carbon dioxide coupled to the photochemical reduction of pyridine nucleotides bv chloroplast preparations. Jour. Biol. Chem. 195: 75-93. 1952. 30. ZBINOVSKY. V. and BURRIS. R. H. Metabolism of 109 infiltrated organic acids by tobacco leaves. Plant Physiol. 27: 240-249. 1952. 31. ZUCKER‚
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Hydrogen peroxide and iodide ions Aim: To determine the rate equation for the reaction between Hydrogen peroxide and iodide ions‚ and to investigate the effects of a catalyst and temperatures on the reaction and to derive the activation enthalpy. Background knowledge: 1Hydrogen peroxide reacts with iodide ions producing iodine‚ when in an aqueous acid solution. H2O2 (aq) + 2I- (aq) + 2H3O+(aq) I2 (aq) + 2H2O(l) To detect iodine you can look at the color shown by the addition of starch
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w w w e tr .X m eP UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Advanced Subsidiary Level and GCE Advanced Level e ap .c rs om MARK SCHEME for the June 2004 question papers 9700 BIOLOGY 9700/01 9700/02 9700/03 9700/04 9700/05 9700/06 Paper 1 (Multiple Choice)‚ maximum raw mark 40 Paper 2 (Theory 1)‚ maximum raw mark 60 Paper 3 (Practical 1)‚ maximum raw mark 25 Paper 4 (Theory 2 (A2 Core))‚ maximum raw mark 60 Paper 5 (Practical 2 (A2))‚ maximum raw mark 30 Paper 6 (Options
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ORIGINAL ARTICLE The use of the stable free radical diphenylpicrylhydrazyl (DPPH) for estimating antioxidant activity Philip Molyneux Abstract Molyneux‚ P. The use of the stable free radical diphenylpicrylhydrazyl (DPPH) for estimating antioxidant activity Songklanakarin J. Sci. Technol.‚ 2004‚ 26(2) : 211-219 The use of the stable free radical diphenylpicrylhydrazyl (DPPH) to estimate the activity of antioxidants is reviewed. Current applications of the method are examined‚ particularly
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A TECHNICAL REPORT ON STUDENTS INDUSTRIAL WORK EXPERINCE SCHEME (SIWES) AT WATER BOARD WATER WORKS DEPARTMENT KADUNA SOUTH PLANT AND WATER WORKS KADUNA‚ KADUNA STATE BY
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I. Parts of a Lab Report 1. Introduction: a. Title b. Research Question c. Hypothesis d. Variables e. Control of Variables 2. Materials & Methods a. Materials b. Method 3. Data a. Data b. raw data c. uncertainty d. presentation e. processing data f. Graphs 4. Results/Conclusion a. Conclusion 5. Discussion a. Evaluation 6. References II. Other Help errors and uncertainty A. Design [pic] I. Research Question
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Aspirin Background Aspirin Aspirin‚ or acetylsalicylic acid (ASA) is a salicylate drug‚ and is generally used as an analgesic (something that relieves pain without producing anaesthesia or loss of consciousness) for minor aches and pains‚ to reduce fever (an antipyretic)‚ and also as an anti-inflammatory drug. Aspirin works by prohibiting biological substances such as prostaglandins. Many different prostaglandins exist in the human body each serving a plethora of physical functions.
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香港考試及評核局 HONG KONG EXAMINATIONS AND ASSESSMENT AUTHORITY 香港中學文憑考試 HONG KONG DIPLOMA OF SECONDARY EDUCATION EXAMINATION 練習卷 PRACTICE PAPER 化學 試卷一 CHEMISTRY PAPER 1 評卷參考 MARKING SCHEME (2012年2月22日修訂稿) (updated as at 22 Feb 2012) Hong Kong Examinations and Assessment Authority All Rights Reserved 2012 PP-DSE-CHEM 1–1 權版留保 局核評及試考港香 © 。旨之巧技用運與力能解理重着試考違有亦 ，難解及對應懂學，習學善改生學助無既，度態習學種這。吞生剝 活，記死背硬，案答準標為視考參卷評將應不生學。用之考參生學 和師教供，寫編而卷習練科本為專局核評及試考港香乃考參卷評本 This marking scheme has been prepared by the Hong Kong
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