Mechanism 4 shows the debromination of 2α-bromocholestan-3-one to give 4. This mechanism which is similar to a Favoskii rearrangement‚ is likely to go via this path as other research has shown that there is often a by-product with this reaction. The by-product is cholest-4-en-3-one which requires the intermediate seen in the third molecule in the above mechanism. The intermediate is highly strained and with the presence of base a proton will be extracted which aids the collapse of the three membered
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characteristics of any one soil type you have studied. (2009 Q18‚ 80 marks) In this answer I will discuss the characteristics of the Brown Earth soil. Brown Earth soils are known as a zonal soil as they developed as a result of the Cool Temperate Oceanic climate and the natural‚ mixed‚ deciduous vegetation of this climatic region. This climatic region is located between 30o and 55o North of the Equator. Brown Earths are the most common soil type in Ireland. Brown Earth soils have a number of characteristics
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her book on Turkish village society‚ The Seed and the Soil‚ describes how virginity testing is related to the way that Turkish villagers conceptualize and explain the reproductive process. They see reproduction as analogous to the planting and growing of crops; the man provides the “seed” with his semen‚ and the woman serves as the “soil” in which the seed germinates and grows. As a metaphor for reproduction‚ the idea of the seed and the soil provides villagers with a way of thinking about and understanding
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AP Chemistry Dr. Istone Lab 3: Gravimetric Analysis of a Metal Carbonate Lab Objective: In this lab we will determine the identity of a group 1 metal carbonate compound by gravimetric analysis. The unknown is weighed and dissolved in water and the precipitate is filtered‚ dried‚ and weighed. From the data the formula weight and identity of the unknown metal carbonate is determined. Lab Procedure: 1. Set up the Bunsen burner and ring clamp‚ light the burner and heat the crucible
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John Gomez Mr. Sterling MicroBio. Bioremediation of explosive contaminated soil "It has been estimated that there are thousands of explosives-contaminated sites within the United States‚ and even a greater number in Europe and the Soviet Union."(2) TNT (2‚4‚6- trinitrotoluene) is one of the most popular explosives used by military forces‚ and due to improper handling and disposal techniques TNT and its derivatives‚ have polluted environments to levels that threaten the health of humans‚ livestock
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Substitute lab for Unit 6 lesson 3: Stoichiometry: Counting by Measuring Mass Purpose Determine the mass of several samples of chemical elements and compounds and use the data to count atoms. Procedure Start Virtual ChemLab and select Counting by Measuring Mass from the list of assignments. The lab will open in the Calorimetry laboratory. Part 1‚ Measuring Metal 1. Click on the Stockroom. Click on the Metals sample cabinet. Open the top drawer by clicking on it. When you open the drawer‚ a
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How is a file identified? A file is often identified by the length‚ shape‚ cut and coarseness of the file. 2. What are the four different cuts found on files? The four different cuts found on files are single‚ double‚ curved tooth and rasp. 3. Name four coarseness designations for files. The four coarseness designations for files are rough‚ coarse‚ bastard‚ second cut‚ smooth‚ and dead smooth. 4. Which of the two kinds of files—single cut or double cut—is designed to remove more material?
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Usually if you work out more‚ the lower your resting heart rate will be but in this case they were pretty similar. This could be because of the chemicals in our bodies‚ or maybe simply people in class don’t count their exercise or just simple errors. 3) Make a graph of exercise and recovery heart rates from Activity 2. Provide a physiological explanation for changes in heart rate from rest to exercise‚ as well as during recovery. Incorporate fundamental concepts of homeostasis in your answer. The
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the unsteady simulations‚ the motion of the center blade was prescribed by a set of equations for the requested mode. The correctness of the imposed motion is confirmed by an analytical model. A timemarching solution was acquired spanning typically 3 oscillation periods. The flow could be regarded as time periodic already after the second oscillation cycle (criterion used: >0.5% phase-locked difference). A time trace of unsteady pressure coefficient at a chosen point on the blade surface is presented
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1. Black soils The principal region of black soils is the Deccan plateau and its periphery extending from 8°45’to 26o north latitude and 68o to 83o45’ east longitude. They are formed from Deccan basalt trap rocks and occur in areas under the monsoon climate‚ mostly of semi-arid and sub-humid types. The overall climate of black soil region may be described as hot and dry summer‚ 40-100 cm rainfall per annum‚ mild to moderate winters and annual temperature ranges from 24-30o centigrade‚ mean maximum
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