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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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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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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Calculating Sample Size Types of Samples Subjective or Convenience Sample - Has some possibility of bias - Cannot usually say it is representative - Selection made by ease of collection Simple Random Sample - No subjective bias - Equal chance of selection; e.g.‚ select the fifth chart seen on every third day - Can usually be backed to say it is representative Systematic Sample - Is a random sample - Equal chance of selection due to methodology; e.g.‚ computer-generated list of
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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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Developments in containership sizes and their impact on terminal productivity. Introduction Since the invention of the container‚ the developing of container vessels has gone fast. Where the first container vessel had a capacity of just 58 TEU‚ nowadays container vessels carry over 11‚000 TEU. This development happened in only 40 years. Before the invention of the container‚ cargo was handled by hand. The loading and unloading of ships took days or even weeks‚ in this way it was not possible to
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