Size Exclusion Chromatography Size Exclusion Chromatography (SEC) is the separation technique based on the molecular size of the components. Size exclusion chromatography is a kind of method to separate different size of molecules that put in solution. It was first discovered by two scientists who named Grant Henry Lathe and Colin R Ruthven. Both of them received the John Scott Award for this fabulous invention. There are various applications for Size exclusion chromatography such as biochemical
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Sample size The process of determining the proper sample size was established through a series of calculations and after obtaining all the possible sample sizes‚ the largest one was taken into consideration to collect the closest number to a representative sample of the population. The following two equations where used: Equation 1: N=z2 *(p.q) E2 N= sample size Z=level of confidence interval at 95% so z=1.96 P=estimated percent of population E=acceptable sample error expressed
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Dear Zeeshan‚ Thanks for your mail and please note that we have contract to supply these goods to our major clients and our normal mode of payment is by 100% T/T advance and this been our system of payment for over a decade now‚we do not like to always payment bank charges/Taxes/Vats and bank’s high rate commission‚so for this major reason and for economical purpse we resolve to make total invoice value of our orders atonce to every of our supplier ok. So kindly accept to prepare the proforma
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Environmental Science The Scientific Method Amber Steadham October 31‚ 2012 Abstract: We conducted several experiments using the Scientific Method. We made observations‚ recorded them and used our observations to propose a hypothesis. The experiments included chemical and physical reactions dealing with torn news paper‚ appearance of rock salt crystals‚ the appearance of sand‚ oil and water on plastic‚ and making iodine in water and mineral oil. We found that all these included four physical
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Cell Size Control David A Guertin‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA David M Sabatini‚ Whitehead Institute for Biomedical Research‚ Cambridge‚ Massachusetts‚ USA Growth in biological systems is defined as the accumulation of mass‚ which leads to an increase in size. In this article‚ we discuss how cells‚ organs‚ and organisms normally control growth‚ and how deregulated growth can lead to a variety of pathological conditions. Introductory article Article
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Super Size Me and Society 15 January 2010 There has been a lot of stir in the media lately regarding McDonalds and its role in obese children in society. So much so that restrictions and regulations have been proposed and passed in California to ban toys from unhealthy meals that appeal to kids. When I first heard about this I thought it was pretty ridiculous. Americans should be free to do what we please. My opinion has changed since watching Super Size Me. I didn’t watch Super Size Me when
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Mustafa Muneer – 11748 Undergraduate Student‚ American University of Afghanistan Academic Writing II – Section 009 Prof. Christopher Henderson 24th July 2012 Influence of Class size on Academic achievement Education has a significant role in part of development of a country. If a country is developed from military‚ cultural‚ political and other parts‚ so it is because of high level of education on that country. Countries that have low and weak level of education they still live in traditional
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Daniel Osherow ENGR 1301 5 December 2012 Copper Wire Sizes (EE) The diameter of a copper wire is measured by using a system called the American Wire Gauge also known as AWG. This system has predominantly been used in the United States and Canada since 1857. Using this measurement the cross-sectional area of a gauge is able to be found. We then use this area to determine the wires current carrying capacity. The gauge numbers for wire and diameter values work inversely‚ as when one increases the
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INDIA – SIZE AND LOCATION 1 I ndia is one of the ancient civilisations in the world. It has achieved multi-faceted socioeconomic progress during the last five decades. It has moved forward displaying remarkable progress in the field of agriculture‚ industry‚ technology and overall economic development. India has also contributed significantly to the making of world history. The Tropic of Cancer (23° 30’N) divides the country into almost two equal parts. To the southeast and southwest of the
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the findings 2. Develop estimated regression equations‚ first using annual income as the independent variable and then using household size as the independent variable. Which variable is the better predictor of the annual credit card charges? Discuss your findings. 3. Develop an estimated regression equation with annual income and household size as the independent variables. Discuss your findings. 4. 4.What is the predicted annual credit card charge for a three-person household
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