Extracted From?.................................................................................................................. 7 Bibliography………………………………………………………………………………………..9 DNA What is DNA? DNA is a molecule called deoxyribonucleic acid which contains the biological instructions‚ meaning it explains about living species; it makes each species unique. It is passed from adult organisms during reproduction‚ along with the instructions it contains. Where is DNA Found? DNA
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Bioresource Technology 79 (2001) 207±225 Review paper The production of poly-(c-glutamic acid) from microorganisms and its various applications Ing-Lung Shih *‚ Yi-Tsong Van Department of Environmental Engineering‚ Da-Yeh University‚ 112 Shan-Jiau Road‚ Da-Tsuen‚ Chang-Hwa 51505‚ Taiwan‚ ROC Accepted 9 April 2001 Abstract This review article deals with the chemistry and biosynthesis of poly-(c-glutamic acid) (c-PGA) produced by various strains of Bacillus. Potential applications of c-PGA as
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Introduction Background Information To begin a discussion about acid-base titrations‚ we must first recall that there are several definitions of acids and bases. For the purpose of this exercise‚ we will consider the Arrhenius definition of acids and bases‚ in which an acid is a proton (H+) donor and a base produces hydroxide (OH-) in solution. When an acid reacts with a base‚ the products of this reaction are water and a salt. Note that salt here does not only mean table salt (NaCl)‚ but can refer
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Ashley Spees CHM 261- Batzer Chem Final Write Up- Kool Aid Lab Total Acid This part of the lab requires titration of Kool Aid with an NaOH solution. The reason titrations are used is to determine the concentration of an unknown solution by reacting a strong acid with a strong base. Titrations are hard to accomplish‚ though‚ due to the fact that indicators used to show the endpoints are very sensitive and one drop could make the solution titrate past its endpoint. Blue stock solution: 3 mg/L
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Unit 4 Assessment 2-Benzoic Acid Synthesis Synthesis and Investigation of Benzoic Acid Our aims: Create benzoic acid using benzaldehyde and hydrogen peroxide. Then remove some impurities from the benzoic acid crystals. Apparatus: Titration Pipette (25 cm3) Burette (50 cm3) Retort stand Clamp Conical flask (250 cm3) Volumetric flask (250 cm3) and stopper White tile Beakers (250 cm3) Dropping pipette Filter funnel Deionised water Phenolphthalein indicator Volumetric flask
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Acids and Bases Are Everywhere Every liquid you see will probably have either acidic or basic traits. Water (H2O) can be both an acid and a base‚ depending on how you look at it. It can be considered an acid in some reactions and a base in others. Water can even react with itself to form acids and bases. It happens in really small amounts‚ so it won’t change your experiments at all. It goes like this: 2H2O --> H2O + H+ + OH- --> H3O+ + OH- See how the hydrogen ion was transferred? Most of the
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Isolation and Characterization of Maize Acid Phosphatase | BCHM 405 | Aaron BANESEH 10307275 | Table of Contents 1 Table of Contents 2 2 Introduction 4 3 Experimental Procedures 5 3.1 Sample preparation 5 3.2 Initial Extraction of Acid Phosphatase 5 3.3 Determination of Protein Concentration by the Folin-Lowry Assay 5 3.4 Specific Activity Assay 6 3.4.1 Definition of Enzyme Unit and Specific Activity- 6 3.5 Determination of pH Optimum 6 3.6 Determination of
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The purpose of the Weak Acid Dissociation experiment is to determine the dissociation constant of a weak acid experimentally by using acid-base titration with a strong base and stoichiometry. An acid-base titration is a method by which a basic (or acidic) solution of unknown concentration is reacted with an acidic (or basic) solution of known concentration. (1) The pH in acid-base titration is measured using a pH meter or color changing indicator‚ such as phenolphthalein‚ as the known solution is
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The conventional method was conducted by placing 2.0641 grams of salicylic acid in a dry 125 mL Erlenmeyer flask. In a fume hood‚ 4 mL of acetic anhydride and 5 drops of concentrated sulfuric acid were added to the flask. The contents were swirled in the flask and then heated for 20 minutes in a hot water bath. After the 20 minutes were up‚ 10 mL of cold water were added in 1 mL increments. The flask was cooled for 10 minutes and occasionally stirred. The crystals that formed were collected via filtration
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14.1 The Nature of Acid and Bases * Acid-Base Theories * Arrhenius- Acid is a hydrogen producer and a base is a hydroxide producer * Bronsted-Lowry- Acid is a proton donor and a base a proton acceptor * Lewis- An acid is an electron pair acceptor‚ and I base is an electron pair donor * Conjugate base & acids * Ka= [products]/[reactants] * Acid dissociation constant * 14.2 Acid Strength * In a strong acid dissociate almost
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