Chlorofluorocarbons Chlorofluorocarbons are non-toxic‚ non-flammable chemicals that are mainly used in the manufacturing of aerosols‚ blowing agents for foams and packing materials‚ as solvents‚ and as refrigerants. They are classified as Halocarbons‚ a class of compounds that contain carbon and halogen atoms‚ and are amongst a group of substances called "greenhouse gases". They eat away at our ozone and raise the temperature of our planet significantly‚ causing detrimental damage to our planet
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will try the following: This is a blue ribbon recipe‚ one of our top-ranked of all time! See more of Epi’s best Double Chocolate Layer Cake Gourmet | March 1999 Engine Co. No. 28‚ Los Angeles CA • recipe • reviews (1460) • photo • video • my notes • find out more user rating 91% would make it again user rating: Double Chocolate Layer Cake 4 forks rate this recipe review this recipe at a glance main ingredients Chocolate type Kid-Friendly‚ Cake appears in this
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natural whether and climatic conditions. 4) Stop using deodorant and aerosol sprays. Air conditioners‚ refrigerators and aerosol sprays use CFC or cholo-fluro-carbons. When CFC leaks into the atmosphere‚ it does deplete the ozone in the air. The Ozone layer is what protects us for harmful radiations of the sun. 5) Builders and architects should use less glass on outer walls of buildings in their designs. For example- a tall building with a glass façade from top to bottom will heat up in the summer. The
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networking models are TCP/IP which had 5 different layers and the OSI model which has 7 layers. They mainly incorporate the same layers and the only difference is that the TCP/IP layer combines layers 5‚ 6 and 7 all into layer 5. Both models are along the same line of information and both explain how a network moves data. 3.2: OSI reference model: The OSI model includes two more layers that the TCP/IP layer already had but is constructed in only layer 5. 7: Application Web browser‚ 6: Presentation
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Bilguun Tugs-Amgalan Everett LeGrande English 1 5/April/2011 People have become overly dependent on technology Humans have been called the animals which make things‚ and at no time in history has this been so obvious as the present. Today‚ every human activity is dependent upon various tools‚ machines‚ and systems‚ from growing food to providing shelter to communication‚ healthcare‚ and entertainment. Some machines‚ like the tractor‚ speed up and make more efficient activities that humans have
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The federal court system is made up of 3 layers: the district courts‚ the circuit courts. These are the first layer of appeal. The final layer is appeal in the federal courts. There are 94 district courts‚ 13 circuit courts‚ and one Supreme Court throughout the country. The Supreme Court is the only court specifically mentioned in the Constitution; Article III mentions the Supreme Court. District courts were created by acts of congress. All the judges and justices are picked by the president
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OZONE LAYER DEPLETION AND GLOBAL WARMING OZONE LAYER DEPLETION AND GLOBAL WARMING. The ozone layer acts as a giant sunshade‚ protecting plants and animals from much of the sun’s harmful ultraviolet radiations. Ozone forms a layer in the stratosphere‚ 15-40 km above the earth surface. If the ozone in the atmosphere from the ground level to a height of 60 km could be assembled at the earth’s surface‚ it would comprise a layer of gas only about 3mm thick. Global stratospheric ozone
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Task 3: How could Thin Layer Chromatography (TLC) have been used to prepare a pure sample of aspirin? The method of using thin layer chromatography is easy‚ quick and relatively cheap to carry out this makes it ideal for preparing pure samples of aspirin. Equipment Required: • Thin Layer Chromatography Paper • Ruler • Pencil • Solvent • Beaker • Micro Capillary • Access to a fume cupboard • UV light • Clingfilm • Individuals sample of aspirin • Pure sample of aspirin • Sample of salicylic acid Method:
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Introduction Chromatography is a technique used to separate a mixture into its individual components. In this experiment‚ chromatography is done by using a thin layer chromatography (TLC) plate and filter paper. The word ‘chromatography’ itself means the separation of colours. However‚ nowadays‚ both coloured and colourless compound are used in chromatography by various methods. In chromatography‚ the separation process of mixture is mainly based upon the polarity and molecular weight of sample
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1 INTERNSHIP REPORT MTN RWANDA PO BOX 264 BY Kalimunda Hakim Student At RTUC Bachelor In Business Information Technologies _____________________ SUPERVISED BY Aymard Mbonabucya Information & Network Security Administrator _____________________ FROM 26 November‚ 2012 TO 15 January‚ 2013 INTERNSHIP REPORT 2 ACKNOWLEDGEMENT I am deeply intended to almighty God who has protected me through the whole period of internship. My special thanks are addressed to the MTN RWANDA administration for giving
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