Polymerization reaCTIONS polymers are high-molecular-weight compounds‚ fashioned by the aggregation of many smaller molecules called monomers. Ex. plastics that have so changed society and the natural and synthetic fibers used in clothing are polymers. Classification of polymers Homopolymers - consist of repeated long chains or structures of the same monomer unit. Ex. PVC(polyvinyl chloride) Copolymers - polymers that consist of more than one molecule. Trimers - molecules consisting
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in TLC 3‚ alumina is non polar and the solvent ethyl acetate is polar so from the ideal that polar does not attract non-polar benzophenone stick stronger to alumina non-polar rather than moving up with polar solvent ethyl acetate as it did in tlc2. 6. Ethyl acetate is polar and Ethyl acetate- hexane is nonpolar‚ use of polarity differences. Because the polarity of the stationary phase silica gel is fixed‚ the mobile faces ratio of ethyl acetate and hexane moves the components further away
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Synthesis and Purification of Acetylsalicylic Acid (ASA or Aspirin) Background Salicylic acid is a phenol as well as a carboxylic acid. It can therefore undergo two different types of esterification reactions‚ creating an ester either with the hydroxyl or with the acid. In the presence of acetic anhydride‚ acetylsalicylic acid (aspirin or ASA) is formed. Correspondingly‚ an excess of methanol will form methyl salicylate‚ which is also an analgesic. In this experiment‚ we shall use
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6.08 Revolutions Module Project Name: Avianna Walden Teacher: Ms. Cawanzia Hughes What to do? You explored many events in this module such as movements of independence and reform. The lessons included revolutions‚ new ways of thinking‚ and examples of imperialism. Use this knowledge to create an illustrated timeline that highlights five of these events. 1. Latin American Independence Haitian Revolution The Haitian Revolution was a slave revolt in the French colony of Saint-Domingue‚ which
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Economy - overviewzz Philippine GDP grew 7.6% in 2010‚ spurred by consumer demand‚ a rebound in exports and investments‚ and election-related spending‚ before cooling to 3.7% in 2011. The economy weathered the 2008-09 global recession better than its regional peers due to minimal exposure to troubled international securities‚ lower dependence on exports‚ relatively resilient domestic consumption‚ large remittances from four- to five-million overseas Filipino workers‚ and a growing business process
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A microprocessor incorporates the functions of a computer’s central processing unit (CPU) on a single integrated circuit (IC)‚ or at most a few integrated circuits. It is a multipurpose‚ programmable device that accepts digital data as input‚ processes it according to instructions stored in its memory‚ and provides results as output. It is an example of sequential digital logic‚ as it has internal memory. Microprocessors operate on numbers and symbols represented in the binary numeral system. The
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the level of “greenness” of a chemical reaction‚ or its “atom economy”. A higher atom economy is preferable because a greater amount of the reactants will be present in the product as opposed to the byproduct.1 A Suzuki reaction is classified as an organic‚ coupling reaction that includes boronic acid and a halide that are catalyzed by a palladium complex under basic conditions. Other palladium- catalyzed coupling mechanisms include the Heck and Stille reactions. Palladium typically exists in the oxidation
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GDF15/MIC-1 is a product of macrophage activation‚ suggesting that it may be involved in chronic inflammatory processes (-). GDF15 is a stress-responsive member of the TGF-β superfamily and initially described as macrophage inhibitory cytokine (-). Although GDF15 has been described in many solid tumors for almost 10 years‚ the nature of its receptor is still unknown. There is some evidence of Smad signaling pathway activation‚ suggesting GDF15 may act through TGF-β receptor superfamily pathways (-)
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sleep times 6‚ 7‚ 8 hours on reaction time (seconds) in humans?” concluded that the group sleeping six hours had an average reaction time of 0.54 seconds‚ the group sleeping seven hours had an average reaction time of 0.60 seconds‚ and the group sleeping eight hours had an average reaction time of 0.45 seconds. The hypothesis was somewhat supported with the group sleeping eight hours having the highest reaction time‚ however‚ the group sleeping seven hours hours had a slower reaction time than those
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Abstract Acetic Anhydride and p-Aminophenol were heated in a vial attached to an air condenser to synthesize crude acetaminophen‚ resulting in 0.097 grams (47.48% yield). The crude acetaminophen was then recrystallized in a solvent of water and methanol over heat resulting in 0.082 grams (39.61% yield) of pure acetaminophen. Melting points of both crude and pure acetaminophen were taken‚ and found to be 165.9 - 170.9°C and 168.2 - 171.5°C‚ respectively. The literature melting point of acetaminophen
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