and biological diversity starting from microorganisms to vertebrates. This diversity has been the source of unique chemical compounds‚ which hold tremendous pharmaceutical potential. New trends in drug discovery from natural sources emphasize on investigation of the marine ecosystem to explore numerous complex and novel chemical entities. Among the first bioactive compounds from marine sources‚ spongouridine and spongothymidine from the Caribbean sponge (Cryptotheca crypta)‚ were isolated serendipitously
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Title: Grass Growth Effect Jessica Suarez Option A: Observation: During the winter‚ you spread salt daily on your driveway to melt the snow. In the springtime‚ when the lawn begins to grow‚ you notice that there is no grass growing for about 3 inches from the driveway. Furthermore‚ the grass seems to be growing more slowly up to about 1 foot from the driveway. Question: Might grass growth be inhibited by salt? My hypothesis is that the grass growth in being inhibited by salt. A typical
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alternatives.1 The role of engineering economics is to assess the appropriateness of a given project‚ estimate its value‚ and justify it from an engineering standpoint. This chapter discusses the time value of money and other cash-flow concepts‚ such as compound and continuous interest. It continues with economic practices and techniques used to evaluate and optimize decisions on selection of fire safety strategies. The final section expands on the principles of benefit-cost analysis. An in-depth treatment
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Activated Carbon Activated Carbon is the best general use adsorbent to remove/reduce a lot of organic and some inorganic contaminants found in different liquid and gas products. Activated carbon has the unique ability to adsorb a wide range of compounds from both the liquid and gas phase. This adsorptive feature is responsible for removing contaminants from water and other substances where the adsorbent material is added. Activated Carbon features a highly crystalline form with a wide surface area
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IELTS Vocabulary: How something works A. Look at these sentences and decide which object is being described in each one. Use the words in bold to help you. You will find the objects hidden in the word grid at the bottom of the page. 1. The most important part of this object is a strip of two different metals‚ one on top of the other. As they heat up‚ both metals expand‚ but one does it faster than the other. The strip bends and connects with a switch‚ which turns off the power supply. When the strip cools
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Synthesis of 3-Acetylcoumarin Introduction In thi lab we were asked to make coumarin. Coumarin is a fragrent organic chemical compound. It is a natural substance found in many plants. The name comes from the french term for tonka bean. The substance was first isolated as a natural product in 1820. Coumarin has been showed to be useful in biological activity‚ but they have been approved for few pharmacutical uses. It has been reported that coumarin activity includes HIV‚ tumors
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HEALTH HAZARDS OF THE DYE INDUSTRY . The first step in prevention of poisoning in the dye industry includes well-ventilated‚ properly equipped buildings. Selection of workmen is important and the use of the best methods in manufacturing. These investigations‚ which are based on 2‚500 employees‚ whose blood was tested periodically‚ yield some minor diagnostic material. The hazards of the dye industry are those connected with any industry plus the poisonous chemicals necessarily handled in the
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TABLE OF CONTENTS PAGE 2. Acknowledgements 3. Dedication 4. Introduction and Background 5. Location 6. Problem Statement 7. Aims and Objectives 8. Methodology 9. Primary and Secondary Data 10. Limitations ACKNOWLEDGEMENTS DEDICATION INTRODUCTION “Since the beginning of time people have needed to find a way of disposing of their trash” (Bassis Luke). Proper garbage disposal is important to ensure everyone’s safety from possible health hazards. The improper waste
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carbocation (4) free radical Ans. (3) 34. Given : 31. E0 Cr 3 / Cr The molarity of a solution obtained by mixing 750 mL of 0.5(M)HCl with 250 mL of 2(M)HCl will be :(1) 0.875 M (2) 1.00 M (3) 1.75 M (4) 0.975 M Ans. (1) 37. Arrange the following compounds in order of decreasing acidity : 36. OH ; Cl (I) OH ; CH3 (II) OH ; NO2 (III) OH 1.51 V OCH3 (IV) E0 Cr2 O2 / Cr 3 7 MnO4 / Mn2 0.74 V ; E 0 1.33 V ; E 0 / Cl 1.36 V Cl (1) II > IV >
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| |Chemistry paper | | | | | | |Class: Ten |Roll No: |Subject: Chemistry | |Student’s
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