air pollution‚ the earth starts to warm up and this therefore induces climate change. Air pollution is created by us humans when we use deodorants which consists of CFC’s that over a long period of time break down ozone particles and thus without even knowing we depleting the ozone layer. Power station and factory fumes and methane from landfills all create air pollution. Non-renewable energy resources such as; oil‚ coal and natural gas‚ all cause air pollution and seeing how much people depend on
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TCP/IP and what do they do? Who is the primary user of TCP/IP? TCP/IP has two parts. TCP is the transport layer protocol that links the application layer to the network layer. It performs segmenting: breaking the data into smaller PDUs called segments‚ numbering them‚ ensuring each segment is reliably delivered‚ and putting them in the proper order at the destination. IP is the network layer protocol and performs addressing and routing. IP software is used at each of the intervening computers through
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Column and Thin Layer Chromatography: The Separation of Spinach Pigment Abstract Spinach extract was separated into fractions containing compounds of similar polarity by column chromatography. Based on solid-liquid phase partitioning‚ this separation technique exploited the different polarity of the compounds in the spinach extract. Three fractions with different colors were obtained. The extract and its fractions were analyzed using thin layer chromatography (TLC). The TLC results showed that
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while leaving the mind yearning for more information to feed our eager imaginations. In the timeless classic‚ Inferno‚ one of the three books that consist of The Divine Comedy of Dante Alighieri‚ Dante Alighieri depicts in immense detail the many layers of Hell. Hell has been described as‚ “enclosed‚ and dark or artificially lighted‚ Hell has neither the cycles of day and night nor the cycle of the seasons; and changes of the weather are unknown up there‚” (Fergusson 101). It is a true place of desolation
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Micro-extraction of urine and/or stomach contents and analysis by TLC Abstract Thin Layer Chromatography (TLC) is one of the oldest chromatographic techniques used for the identification of compounds and for determination of the presence of trace impurities. The aim of the experiment was to determine two unknown samples (X and Y) by comparing results to the known standard drugs‚ of which there was five‚ using a specific TLC method. The same technique was used for the determination of
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unshielded twisted-pair (UTP) - Copper wiring used in small-to-large networks to connect host devices to hubs and switches. Core - the central part of an optical fiber that provides the transmission region for an optical signal. Cladding - A layer of optical glass surrounding the light-carrying core of an optical fiber. Radio waves - An electromagnetic wave used for long distance communication. Wireless WAN - A wireless wide area network‚ is a form of wireless network its a larger version
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Shock Waves (2009) 19:453–468 DOI 10.1007/s00193-009-0220-z ORIGINAL ARTICLE Some physical aspects of shock wave/boundary layer interactions Jean Délery · Jean-Paul Dussauge Received: 9 February 2009 / Accepted: 29 June 2009 / Published online: 26 July 2009 © Springer-Verlag 2009 Abstract When the flow past a vehicle flying at high velocity becomes supersonic‚ shock waves form‚ caused either by a change in the slope of a surface‚ a downstream obstacle or a back pressure constraining the
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Drugs screen using Thin Layer Chromatography of basic illicit drugs Abstract The majority of evidence submitted to crime labs comes from drug-related crimes. Often‚ this evidence includes unidentified powders that may be illegal drugs. In order to prosecute individuals for possession of illegal substances‚ it is necessary for forensic scientists to positively identify any suspected drugs submitted to the laboratory. In addition‚ forensic toxicologists must determine the identity
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Among the first wave of Portuguese immigrants to America there remained a sort of stubborn pride in their cultural origins and traditions. In part because the communities around New Bedford and Fall River‚ and even out west in California‚ were considered “colonies” back home. Rather than resent the emigration of its people‚ the country—which needed emigration to relieve a growing overpopulation‚ especially on the islands of the Azores—took pride in what they saw as extending the Portuguese nation
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Experiment 3: The preparation of acetaminophen (paracetamol) with thin layer chromatography (TLC) to monitor the reaction. Abstract: This experiment is to demonstrate the preparation of paracetamol and its properties. Reflux and filtration of 4-aminophenol and acetic anhydride formed the crude sample. Further analysis of dry white crystals were used to give quantitative measurements and a percentage yield of 46% was obtained. The overall conclusion is that the acetic anhydride reacted with the
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