groups (1). Based on the principle of hard–soft reactivity‚ i.e. hard nucleophile attacks on hard electrophile and the soft nucleophile on soft electrophile‚ we have suggested an alternative reaction mechanism for the formation of thiazole-2-imine. Our mechanism is supported by isolating the reaction intermediate‚ confirming its structure and that of the products by X-ray crystallography (2). Having understood the reactivity of thioureas toward α-haloketones‚ recently‚ we have suggested an alternative
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As you may know‚ the bees are vanishing. Most people may say‚ “ehh bees aren’t important‚ they just make honey”. Which is not true‚ bees play a huge role in our daily life. Did you know that bees pollinate one third of out diet? Without bees there wouldn’t be apples‚ oranges‚ melons or broccoli. Most people just don’t understand the seriousness of this problem! There has been a lot of misunderstanding and confusion when it comes to the reasoning of this bee problem. Up to this day there still
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THE WONDERFUL HYGENIC WORLD OF SHAMPOO Everyone who uses shampoo could tell you that their main factors in choosing a shampoo to use are smell‚ look‚ and price. People are misinformed about shampoo and how to tell the difference between a good shampoo and a bad one. The main point of shampoo is to cleanse your skull of residue that is picked up either from hair products such as hair spray‚ gel or moose‚ as well as the dirt in the air‚ and perspiration. Shampoo is something that all of us use on
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Chemical Education Today Especially for High School Teachers by Erica K. Jacobsen Chemistry in My Kitchen The Jacobsen kitchen is an unusual place. The atmosphere is often more “mad scientist” than “gourmet chef ”. Testing JCE Classroom Activity procedures at home brings an eclectic collection of materials to our counters. Our toaster competes for space with a collection of funnels made from 2-liter plastic beverage bottles and rubber stoppers (1). Baking soda from my shelf joins citric acid
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Product Proposal I. Calamansi Jam Calamansi Jam is a fruit spread made from pure and natural calamansi extracts and sugar. It is very nutritious and contains Vitamin C that can be of great help to our immune system. This product is delicious and at the same time good for our health. II. Related Product Introduction Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin‚ and contains essential nutrients
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to exchange either positively charged ions (cations exchanges) r negatively charged one (anion exchangers). Many natural substances such as proteins‚ cellulose‚ living cells and soil particles exhibit ion exchange properties which play an important role in the way they function in nature. Synthetic ion exchange material based on coal and phenolic resin were first introduced for industrial use during the 1930s. Results and Calculations The concentration of Ni2+ and Fe3+ ions was to be calculated
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The members in our group were Whitney‚ myself‚ and Charlotte. The title of this lab was “reaction types.” The purpose of this lab was to identify the reaction type‚ balance equations‚ and observe the reactions .Our hypothesis was if there was many stations with fire‚ then they’re would be many combustion reactions. The procedure of the first lab was to place a solid piece of magnesium metal in the bottom of the smallest tube. Place this test tube in the test tube holder. Using tongs pick up the
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thermodynamics plays a vital role in the design of any engine or power-generating plant‚ and therefore a good grounding in thermodynamics is required for much work in engineering. If thermodynamics only governed the behavior of engines‚ it would probably be the most economically important of all sciences‚ but it is much more than that. Since the chemical and physical state of matter depends strongly on how much thermal energy it contains‚ thermodynamic principles play a central role in any description of
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INORGANIC CHEMISTRY – CLASS XI (ISC) Properties of Group 1 elements [Alkali metals] 1. Due to high reactivity‚ alkali metals do not occur free in nature. Elements of group 1 (or IA) are known as alkali metals because their hydroxides are soluble in water and form strongly alkaline solutions. Alkali metals are stored under kerosene oil because they get tarnished on exposure to air. 2. The general electron configuration of alkali metals is ns1. 3. Alkali metals have largest size and lowest
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Atmosphere –Water Interactions C. P. Huang Stumm W. and J. J. Morgan. Chapter 5. Aquatic Chemistry 1 Environmental Systems 2 5.2 Atmospheric generation of acidity 3 Genesis of acid rain 4 Chemical processes and Chemical Composition of Water Droplets 5 uM ueq/L NO360 60 SO4244 88 Cl 25 25 S(X) 173 Mg2+ 4.5 9 Ca2+ 16 32 NH4+ 85 85 K+ 2 2 Na + 5 5 H+ 50 50 S(M) 183 CH3COOH 5 5 6 7 8 Total Annual
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