Lipids and Phospholipids The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate‚ a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy. The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The
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Diffusion Experiment: Osmosis in Sucrose Solutions Abstract We used dialysis tubing to simulate a semi-permeable membrane. Since molecules diffuse from their higher concentration to their lower concentration‚ water will move across the membrane in response to this concentration. While conducting this lab we were able to observe passive transport through diffusion and osmosis. Introduction Osmosis is a specialized case of diffusion that involves the passive transport of water. When
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The Foreshadowing of What Happened To Homer Barron The story of “A Rose for Emily‚” by William Faulkner‚ shows many examples of foreshadowing. The greatest representations of foreshadowing is the climax of Homer Baron’s discovery. Throughout the story hinting of this odd ending is addressed in the smell‚ the poison and the unveiling of the locked floor. These are excellent clues that leads to the unearthing of Homer Baron’s body. In the beginning of the story the town starts complaining
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Final Case Study: What Really Happened to Grigori Rasputin Cynthia L. Moss Student ID: 4203947 American Military University Abstract Forensic anthropologists work on current criminal investigations and historical questions. For this assignment‚ the student will choose one modern forensic case and the forensic anthropologist who is/was associated with the case. The student will systematically identify the role of the forensic anthropologists in the recovery efforts; describe
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Economic Analysis) The Federal Reserve announced earlier this month that they will keep the short-term interest rates near zero percent for at least the next two years hoping to get consumers to spend. Normally‚ the Federal Reserve would announce low interest rates are extended for “an extended period” but this statement sounds like they are also pessimistic about the economy. Low interest rates have been in place for several months and it hasn’t quite spurred the economy like it’s supposed to. The
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OCEAN CARRIERS ANALYSIS DATE: 8/29/2007 TO: MS MARY LINN CC: PROF. TOM MILLER FROM: RYAN DALE SEELKE RE: DECISION ON CAPE SIZE CARRIER PRIORITY: [URGENT] Ms Mary Linn‚ After careful cash flow analysis and a discount rate (WACC) of 9%‚ commissioning a capsize carrier for 25 years is the only appropriate option for our firm. However‚ if the discount were instead 10%‚ both options would fail the NPV test by yielding negative results. I make this recommendation after thorough analysis of
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soldiers were badgered to the point of outrage by a small group of boys (Wheeler and Becker‚ 75). The soldiers eventually retaliated at the group and the church bells started ringing alarming the town that a fire had broken out only leading the numbers in the crowd to increase (Wheeler and Becker‚ 75). Captain Thomas Preston and his sentry were called to the scene to assist. However‚ their attempts to redirect the crowd were unsuccessful. It is at this point that a musket was fired and the situation
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Basil used the promised troops that Vladimir sent to him to end the civil war in his favour. The scholars still debate what happened next‚ it can be stated that Vladimir did attack the Byzantine city of Cherson in the Crimea. It was from here that Vladimir demanded that Basil send him his promised bride. It is a questionable matter as the matter took place after the agreements‚ Vladimir may have even attempted to force Basil to keep his word‚ but the evidence is inconclusive. Indeed‚ Basil was no
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have the opportunity to learn about where we have come from and where we can go. Even though the study of history has been a major part of our education‚ the actual method of teaching it has presented several limitations to our youth. Teaching What Really Happened is an excellent source that presents relevant issues regarding history education and proposes countless solutions to these pitfalls in education.
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METHODOLOGY After formulating the hypothesis that the molecular weight affects the rate of diffusion‚ three different kinds of substances --potassium permanganate (KMNO4)‚ potassium dichromate (K2Cr2O7) and methylene blue (C16H18N3SCl)‚ were used to test the validity of the hypothesis. Potassium permanganate is an inorganic chemical compound which is in violet liquid form; potassium dichromate is an orange inorganic chemical reagent and methylene blue is a chemical compound commonly used for staining
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