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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instead of time value of money tables. The reason is so that students are able to answer all sorts of questions that involve interest rates and time period that are not available in the tables. OUTLINE OF THE NOTE A. Simple Interest B. Compound Interest 1. Single Amount • Future Value • Present Value • Finding the time period • Finding interest rate • Effective annual rate (EAR) • Continuous compounding 2. Multiple Cash Flows i) Annuity • The basics • Future Value of Annuity
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measure the amount of chemicals that are in a solution. It is a simple method to use and it is useful to use in different branches of chemistry. Many industries use the variety of forms of titrations so they can either develop or analyse key chemical compounds because it is resourceful. Titrations are used in companies in many areas of society. Acid Rain Environmental scientists analyse precipitation and how it responds to pollution. A titration is usually used to calculate the amount of natural rain
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acid from methyl salicylate. To do an organic synthesis‚ it is needed to chemically modify the molecules of another compound to end up with the desire compound. Methyl salicylate is the major constituent of wintergreen oil‚ which is why it was used in this experiment as the starting material. The new technique used in this experiment is heating under reflux. Many organic compounds‚ when heated become volatile and it is easy to lost some. The idea of this technique is to add a vertical condenser to
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Environmental Chemistry It often matters how much given atoms combine‚ in what arrangement‚ with what others‚ what impulse they receive‚ and what impart. The same ones make up earth‚ sky‚ sea‚ and streams; the same as the sun‚ the animals‚ grains and trees‚ but mingling and moving in every different ways. - Lucretius (95-52 B.C.) in The Nature of Things I. Physical Chemistry Why is Physical Chemistry important in the study of Environmental Engineering? • Applied physical chemistry procedures
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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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What is heartburn and when does it occur? Heartburn occurs when hydrochloric acid‚ which is used to digest food in the stomach‚ backs up into the oesophagus causing an irritation. Normally the oesophageal sphincter would close tightly‚ not allowing the acid to back up. If this valve‚ however‚ is not functioning‚ the acid can slip by. Occasionally heartburn can be associated with hiatus hernias. Describe how the heart remedy works‚ including a description of what a neutralisation reaction is
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