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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Size reduction and screening The purpose of this experiment was to determine the affect of vibration rate and time on the size reduction and size separation of particles. The objective was successfully completed and the initial sample of soil was separated by vibration into finer particles with a large amount passing through the smallest diameter screen which was 0.0278 inches producing a final product of fine soil particles which are now easier to transport and store. As can be seen from the
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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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The U.S. market for dental materials is a dynamic industry with a market value of over $1 billion as of 2013‚ after the inclusion of direct sales. This market will grow substantially to approach $1.5 billion by 2020. The Dental Material market is composed of segments for dental cements‚ impression materials‚ direct restorative materials (composites‚ for example)‚ bonding agents‚ core buildup materials and dental local anesthetics. More than a dozen dental material companies operated in at least four
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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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