Column and Thin Layer Chromatography Beverly Abstract: Plant pigments were separated and concentrated from a crude spinach extract through the use of column chromatography and an eluatropic series of hexanes‚ hexane/acetone‚ and methanol. The pigments were analyzed using thin layer chromatography with a 30% ethyl acetate/hexane developing solvent. Introduction: Chromatography is a technique used to separate a mixture of two or more components based on
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ISO-OSI 7-Layer Network Architecture This lecture introduces the ISO-OSI layered architecture of Networks. According to the ISO standards‚ networks have been divided into 7 layers depending on the complexity of the functionality each of these layers provide. The detailed description of each of these layers is given in the notes below. We will first list the layers as defined by the standard in the increasing order of function complexity: 1. Physical Layer 2. Data Link Layer 3. Network Layer 4.
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<b>The Greenhouse Effect</b> <br>The earth’s climate is predicted to change because human activities are altering the chemical composition of the atmosphere through the build up of greenhouse gases primarily carbon dioxide‚ methane‚ and nitrous oxide. <br> <br>Energy from the sun drives the earth’s weather and climate‚ and heats the earth’s surface. This causes the earth to radiate the energy back into space. Atmospheric greenhouse gases (water vapour‚ carbon dioxide‚ and other gases) trap some
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Associate Level Material Sedimentary Rock Worksheet Use the following table to describe and distinguish between the effects of weathering and erosion. Each response must be at least 200 words. |Effects of Weathering |Effects of Erosion |What are the Differences? | |Weathering is a multifaceted contact of |Soils that are removed naturally by living |As stated before‚ weathering is based on | |biological‚ physical‚ and chemical
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Additive layer manufacturing for aerospace parts ES Technology Additive layer manufacturing ES Technology has revealed that additive layer manufacturing (ALM) for direct part production has been embraced by a number of manufacturing sectors‚ not least the aerospace industry The ability to produce components in a range of materials including hot-work steels‚ stainless steel‚ cobalt chromes and Inconel‚ plus titanium and aluminium alloys‚ presents the aerospace industry with large potential for
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The significance of the title in decoding what is in the artist’s mind lies in the little details in the painting itself. The noun “layers” indirectly draws the viewer towards a picture covering a piece of material -- the tudung. What then does the title represent? It seemingly explains about the lessons that the artist had to learn or is in the process of learning while discovering
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Assignment 4: Social Media Marketing Rocks! Submitted by: LE August 24‚ 2013 Introduction Social media marketing has become exceedingly popular among businesses of all sizes. Social media marketing offers many advantages—as well as disadvantages—for both businesses and entrepreneurs. Social media networks have helped Pepsi and other businesses reach new audiences and gain critical customer insight. Because social
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Metamorphics. 2. During his whole career‚ he has hit 4675 Rbi’s and 1001 Homeruns. 3. He has reached the peak of his career. 4. He has been experiencing heat and pressure and is starting to age. 5. His amazing baseball attributes are beginning to fade as he begins to age and go through heat and pressure. 6. During this time‚ he was known as Metamorphic Miguel. D. Metamorphic Miguel 1. He is now a 100
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J. (2013‚ September 13). What Twitter CEO Dick Costolo is like as a leader. The Washington Post. Retrieved from http://www.washingtonpost.com/blogs/on-leadership/wp/2013/09/13/what-twitter-ceo-dick-costolo-is-like-as-a-leader/ Stone‚ B. (2012‚ March 5). Years of Chaos and Fail Whales Didn’t Stop Twitter. Now the Company that Couldn’t Kill itself May be about to Take Flight. Bloomberg Businessweek‚ p.62-67.
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employees etc are available 3. Switching cost High (4) - Hotels have higher bargaining power and can easily switch between suppliers 4. Suppliers’s threat of forward integration High (5) - Suppliers are highly unlikely to forward integrate into the hotel business 5. Industry’s threat of High (4) - Hotels could backward backward integration integrate to own their own real estate company - They could have their own training wing 6. Contribution
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