one of two very similar pentose rings. Ribonucleic acids contain the sugar ribose. Deoxyribonucleic acids contain the sugar deoxyribose. The only difference between these two sugars is that deoxyribose contains one oxygen atom less than ribose. Pentose sugars are essential because they are involved in linking different nucleotides together by condensation reactions. The Nitrogen-Containing Bases There are two types of bases found in nucleic acids. The purine bases have two nitrogen containing rings
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pdfMachine ii Is a pdf writer that produces quality PDF files with ease! Produce quality PDF files in seconds and preserve the integrity of your original documents. Compatible across nearly all Windows platforms‚ if you can print from a windows application you can use pdfMachine. Get yours now! TABLES OF CONTENT ACKNOWLEDGEMENT TABLE OF CONTENTS LIST OF TABLE LIST OF FIGURES ABSTRACT ABSTRAK CHAPTER 1 - INTRODUCTION 1.0 Introduction 1.2 Problem of statement 1.3 Scope of study 1.4 Objectives
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studies have been reported for the base-catalyzed formation of chalcone and its derivatives. [7‚ 8‚ 9] Two alternative mechanisms have been advanced for the reaction of benzaldehyde with acetophenone in the presence of a basic catalyst. 5 The formation of chalcone by the acid catalyzed condensation of acetophenone and benzaldehyde has been studied [10]. The following mechanism seems to be operating- 6 Importance of chalcones [1]They have close relationship with flavones‚ aurones‚ tetralones and
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Flowers and Acid Call them freaks‚ the underground‚ the counterculture‚ flower children‚ or just simply hippies‚ they are all loose labels for the youth culture of the 60’s that transformed life in the West as we knew it‚ introducing the spirit of freedom‚ of hope‚ of happiness‚ of change‚ and of revolution (Miles 9). The years that made up the 1960’s were some of the most exciting and turbulent years in American history. The post World War II baby boomers grew up. A president and
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8-(4-(decyloxy) phenyl)-1‚ 3‚ 5‚ 7-tetramethyl-2‚ 6 diiodo-4-bora‚ 3a‚ 4a-diaza-s-indacene both commence with the synthesis of 4-(decyloxy) benzaldehyde. Following standard procedures and using the resulting aldehyde‚ along with 2‚4-dimethylpyrole‚ a BODIPY dye was obtained [36]. To facilitate intersystem crossing‚ the 2- and 6- positions of the boradiazaindacene ring system were iodinated with an iodic acid-iodine mixture [37]. Bromination at the same positions was performed via N-bromosuccinamide (NBS)
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Lab 3: Grignard Synthesis Objective: The goal of this lab is to synthesize a Grignard reagent from bromobenzene and magnesium metal in diethyl ether. This same Grignard reagent would then be used to prepare a tertiary alcohol and then purify and characterize the product. Table of Reagents: Name Chemical formula Melting Point Boiling Point Density Safety Hazards Diethyl ether C4H10O -116.3°C 34.6°C 0.7134 g/ml Flammable Bromobenzene C6H5Br -30.6°C 156°C 1.5 g/ml
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Acidification: From Nutmeg to Trimyrisitin to Sodium Myristate to Myrisitic Acid Mandy Boyle Chem 213‚ Section 002 Due Date: December 3‚ 2009 I. Introduction People encounter esters everyday in both natural and synthesized forms. Esters are present in a variety of common compounds‚ from fragrances to animal fat (McMurry‚ 2008). Although these esters can undergo many different important reactions‚ this lab is particularly interested in the hydrolysis of esters into carboxylic acids and alcohols
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analyze data and draw a conclusion. In this experiment I will find out that in a type of water the Alka-Seltzer will dissolve faster and slower. Alka-Seltzer is one of the world’s best known antacids. Its main function is to absorb excess stomach acid. II. MATERIALS: * Tap Water - Warm Water * Cold Water - Salt Water * Acidic Water -5 cups (250 mL of water in each cup) * A whole Alka-Seltzer tablet III. HYPOTHESIS: My hypothesis is that the Alka-Seltzer tablet
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Shikimic Acid‚ intermediate for the production of Oseltamivir‚ the Avian Flu drug Supervised by: Dr. Reza Yegani Dr. Mohammad Hossein Sarrafzadeh Mr. Habibollah Ramezanzade by: Kaveh Yazdifard Presented on: 1385/10/3 Contents Acknowledgement Introduction Shikimic Acid & its Natural Properties Derivatives of Shikimic Acid Avian Flu Sickness‚ Medications Oseltamivir and Shikimic Acid’s Role in Synthesis Production of Shikimic Acid Extracting Shikimic Acid from the Plant
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to learn how to use salicylic acid to make aspirin. Aspirin is the most widely used over-the-counter drug in the world. The average tablet contains about 325 milligrams of acetylsalicylic acid with an inert binding material such as starch. Aspirin is used to relieve pain‚ reduce inflammation‚ and lower fever. Aspirin originally was derived by boiling the bark of the white willow tree. Although the salicin in willow bark has analgesic properties‚ purified salicylic acid was bitter and irritating when
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