reducing agents such as LiH‚ LiAlH4‚ or NaBH4 must be carefully chosen. Being that LiAlH4 and NaBH4 will not react with isolated carbon-carbon double bonds nor the double bonds from aromatic rings; the chosen compound can be reduce selectively when the nucleophile only react with electrophilic carbons. Figure 1: reduction mechanism for the reaction In this experiment‚ the benzil (diketone) is used as the organic substrate. Sodium borohydride‚ NaBH4 is used as the reducing agent (metal hydride)
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plates steel wool/sand paper | | | | Solutions of: | copper(II) sulfate Ferric nitrate Silver nitrate Lead (II) nitrate | | Procedure: 1. Obtain 4 samples of each metal and clean with steel wool or sand paper. Wash your hands after cleaning the metals so you are not exposed to lead dust). 2. Fill four bubbles on a spot plate with one of the solutions. Place one metal in each of the bubbles. Observe and record the before and after appearance. 3. Fill four new bubbles with a second
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Overview Chemical Warfare is using the chemical properties of a substance to your advantage during war. This has been going on for centuries. Even the most basic forms of weapons were used. People have been putting poison on the end of their spears and arrows since they have been around. Over the years‚ it has also developed into much more advanced chemistry. In this article‚ I am going to focus on the more advanced‚ modern uses of chemical warfare in World War I and World War II. World War
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Kahuna Cleaning Supply Chapter 4 Kahuna Cleaning Supply is a family-run business based in New Haven‚ Connecticut that specializes in commercial cleaning supplies and business support products for commercial‚ industrial‚ and institutional clients. Only a few computerized operations are in the business. In an effort to become more efficient and profitable‚ the vice president‚ Julia Thompson‚ has hired a systems analyst‚ Robert Hanover. Background Julia and Robert have made progress in the development
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elementary reactions: one that loses electrons and another that gains the electrons that was lost. Gaining of electrons is referred to as Reduction reaction (the species that undergoes reduction is called as oxidizing agent) while losing of electrons is called Oxidation reaction (the reducing agent is the species that undergoes oxidation). In this experiment‚ seven different set-ups were made which were eventually divided into three different groups. Group 1‚ those on Part A‚ were set-ups that investigated
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CLEANING SUPPORT TECHNIQUES Team 9.2.3 EHL’s Honour Code: As a student at the Ecole Hôtelière de Lausanne‚ I uphold and defend academic integrity‚ academic rigor and academic liberty as core values of higher learning. I attest‚ on my word of honor‚ that work submitted in my name is my own work‚ and that any ideas or materials used in support of this work which are not originally my own are cited and referenced accordingly BINGGELI Vanessa DANG Yung GOUVEA Priscila KRAMER Toby ORLANDO Giulia SCHNYDER
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abrogate essential defense mechanisms. Immunosuppressive Drugs 2. FOUR MAJOR CLASSES 1. Corticosteroids Prednisone (DELTASONE) and Prednisolone (HYDELTRASOL)‚ Dexamethasone 2. Cytotoxic Agents Cyclophosphamide‚ Azathioprine (IMURAN)‚ and Mycophenolate Mofetil (CELLCEPT) 3 T cell Suppressive Agents 3. T‐cell Suppressive Agents Cyclosporine (SANDIMMUNE) and
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started to question if the fighting against communism was even necessary or worth the trouble. Unlike World War 1 and 2 the Vietnam War was filmed in colour and was shot across the media all over the world showing the terrible chaos of war such as Agent Orange which sent casualties and nurses wounded. This sent the first change of mind about war to society and the doubt that Australia might be threatened by the influence of communism. The major issue began when in 1964 the Menzies government decided
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trough underneath for applying an even layer of fertilizer over lawns and gardens. Some spreaders connect with a tow hitch to the back of a tractor. Smaller models have a handle and wheels for pushing the spreader yourself. As with all garden tools‚ cleaning your spreader after each use will prolong the life of the equipment and ensure proper operation. A garden hose may be used‚ but a power washer works best. 1. Empty the hopper of all fertilizer‚ either by spreading the product on your garden or
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until it becomes light and fluffy and increased in volume‚ due to the incorporation of tiny air bubbles. These air bubbles‚ locked into the semi-solid fat‚ remain in the final batter and expand as the item is baked‚ serving as a form of leavening agent. Butter is the
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