lowering the pH (between 5.5 and 3.6)‚ while the viscosity of samples with pH below 3.5 decreased further than that of the control (pH ) 6.3). Citric acid promoted the collapse of starch granules; however‚ adding excessive citric acid led to the hydrolysis of glucose chains. No decrease in the viscoelasticity was observed for cornstarch pastes by adding acid at 25 °C after gelatinization. KEYWORDS: Cornstarch; viscoelasticity; citric acid; pH INTRODUCTION Starch has been widely used as a thickener
Premium Starch Acid Viscosity
Difco & BBL Manual Manual of Microbiological Culture Media Second Edition Editors Mary Jo Zimbro‚ B.S.‚ MT (ASCP) David A. Power‚ Ph.D. Sharon M. Miller‚ B.S.‚ MT (ASCP) George E. Wilson‚ MBA‚ B.S.‚ MT (ASCP) Julie A. Johnson‚ B.A. BD Diagnostics – Diagnostic Systems 7 Loveton Circle Sparks‚ MD 21152 Copyright 2009 Becton‚ Dickinson and Company 7 Loveton Circle P.O. Box 999 Sparks‚ Maryland 21152 ISBN 0-9727207-1-5 All rights reserved Printed in the United States of America AOAC
Premium Growth medium Bacteria Microbiology
Shier‚ Butler‚ and Lewis: Hole’s Human Anatomy and Physiology‚ 10th ed. Chapter 4: Cellular Metabolism Chapter 4: Cellular Metabolism I. Metabolic Processes A. Introduction 1. Metabolism is the sum total of chemical reactions within cells. 2. In metabolic reactions‚ the product of one reaction serves as starting materials for another metabolic reaction. 3. This chapter explores how metabolic pathways supply a cell with energy and how other biochemical
Premium Metabolism Adenosine triphosphate Protein
Experiment 4 – Effect of Temperature on Enzyme Activity Aim To study the effects of temperature on the activity of amylase enzyme on starch solution. Introduction Enzymes are widely known as biological catalyst. Almost all cellular reactions are controlled and guarded by enzymes. Virtually every metabolic reaction which takes place within a living organisms are catalyzed by enzymes. Enzymes are complex three-dimensional globular proteins. Some of the enzymes are built up off proteins and
Free Enzyme
V. HAZADOUS WASTE TREATMENT PROCESS Presently‚ the hazardous waste treatment technologies are highly developed from the decade before due to the more environmental and ecosystem concerning. Moreover‚ hazardous waste not threaten only environment but also to human hygiene and health. However‚ one of the most dangerous hazardous waste is dichlorodiphenyltrichloroethane (DDT). Addition‚ DDT is used as a majority pesticide during agriculture revolution period‚ and also uses to regulate Malaria in developing
Premium Oxygen Carbon Activated carbon
Unit 4B Task 2 Title Recrystallization of benzoic Acid Aim Equipment 1. Erlenmeyer flask 2. Graduated cylinder 3. Hot plate 4. Small beaker 5. Ice bath (if necessary) 6. Filter paper 7. Buchner funnel 8. Spatula 9. Weighing machine Method 1. Weighing paper was used to weigh approximately 1.00g of ‘impure Benzoic acid to produce re crystallization’. 2. Moved it to a 125ml Erlenmeyer flask. 3. Poured approximately 20ml of distilled water by using a graduated cylinder
Premium Laboratory glassware Erlenmeyer flask Water
primarily with water‚ resulting in formation of new stable compounds and secondary residual materials. Following are the types of Chemical Weathering that occur in common. Hydrolysis: This chemical process happens in case of silicate minerals reacting with water. Granite and sandstone commonly undergo hydrolysis. The H+ and OH- ions in water replace mineral ions (calcium‚ potassium etc.) to form clay and weak acids. Clay is a weak mineral which crumbles easily and hence withering of rock
Premium Oxygen Mineral Iron
Biology I Laboratory Manual. McGraw-Hill‚ 2010. Print. Kraut‚Joseph. “How do Enzymes Work?” Science 242.4878 (1988):533+.Academic OneFile. Web.3 Nov.2010 Raven‚ Peter H. Biology. Dubuque‚ IA: McGraw-Hill‚ 2011. Print Zorov‚ I. N.‚ and M. V. Semenova. "Hydrolysis of Wheat Flour with Amylase Preperations and Invidual Enzymes." Applied Biochemistry and Microbiology 42.6 (2006): 616-19. Print.
Premium Enzyme Amylase Starch
1. INTRODUCTION 1.1 ENZYMES THE ENZYMES SPEAK!! “We are the catalysts of the living world! Protein in nature and in action specific; rapid and accurate; huge in size but with small active centres; highly exploited for disease diagnosis in lab centres”. DEFINITION Enzymes may be defined as biocatalysts synthesised by living cells. They are protein in nature (exception RNA acting as ribozyme) colloidal and thermo-labile in character and specific in their action. HISTORICAL BACKGROUND In
Premium Enzyme Cellulose
out of cells and lower the activation energy of a reaction. Amylase is the enzyme which catalyses starch hydrolysis. Alpha amylase and beta amylase are two types of amylase enzymes. The amylase which is the most commonly found in the human body is the alpha amylase. Beta amylase is mainly found in bacteria‚ fungi and plants. Amylase breakdown starch into maltose. During the process of hydrolysis‚ Amylase degrades starch by splitting the long glucose units into smaller intermediates and finally producing
Free Enzyme