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
Premium Marine biology Chemical compound Ocean
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
Premium Water Mixture Snow
I. Introduction a. Attention Getter: Have you ever wondered how you could make your own hair bows? Do you want to learn to make hair bows for that precious little girl in your life? b. Brief Background: The idea to make hair bows first came to me after shopping for bows at the mall and realizing that they were not only poorly made but also extremely expensive. Hair bows are fun and simple to make‚ and anyone can learn how in just a few easy steps. (www.makehairbows.org)
Premium
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
Premium Net present value Compound interest Time value of money
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
Premium Activated carbon Water purification
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
Premium Metal Light Chemical compound
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
Premium Chemical substance Distillation Acetic acid
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
Premium Chemical compound Tuberculosis Acetic acid
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
Premium Waste Pollution Recycling
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 >
Premium Oxygen Chemistry Alcohol