revolutions per minute (rpm)‚ and the centrifugal force generated is expressed in terms of relative centrifugal force (RCF) or gravities (g). The speed of the centrifuge is related to the RCF by the following equation: RCF 1.118 105 r (rpm)2 where 1.118 105 is a constant‚ determined from the angular velocity‚ and r is the radius in centimeters‚ measured from the center of the centrifuge axis to the bottom of the test-tube shield. The RCF value also may be obtained from a nomogram similar
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(DPPH) for estimating antioxidant activity Songklanakarin J. Sci. Technol.‚ 2004‚ 26(2) : 211-219 The use of the stable free radical diphenylpicrylhydrazyl (DPPH) to estimate the activity of antioxidants is reviewed. Current applications of the method are examined‚ particularly the use of the parameter EC50 (substrate concentration to produce 50% reduction of the DPPH). Some recommendations are made as to the most suitable ways of carrying out this assay and evaluating the data produced. Key
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• Presents the research and ideas of the field rather than each individual work or author by itself. A literature review often forms part of a larger research project‚ such as within a thesis (or major research paper)‚ or it may be an independent written work‚ such as a synthesis paper. Purpose of a literature review A literature review situates your topic in relation to previous research and illuminates a spot for your research. It accomplishes several goals: • provides background for your
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Activity-Based Costing: a Case Study on a Taiwanese Hot Spring Country Inn’s Cost Calculations Wen-Hsien Tsai Department of Business Administration National Central University‚ Chung-Li‚ Taiwan‚ ROC Jui-Ling Hsu Department of Business Administration National Central University‚ Chung-Li‚ Taiwan‚ ROC Department of International Trade Ta-Hwa Institute of Technology‚ Hsin-Chu‚ Taiwan‚ ROC Abstract The aim of this paper is to analyze the operational costs of a hot spring inn in the
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colorimetric techniques. It is named for the biochemist Oliver H. Lowry who developed the reagent in the 1940s. His 1951 paper describing the technique is the most-highly cited paper ever in the scientific literature‚ cited over 200‚000 times. The method combines the reactions of copper ions with the peptide bonds under alkaline conditions (the Biuret test) with the oxidation of aromatic protein residues. The Lowry method is best used with protein concentrations of 0.01–1.0 mg/mL and is based on the reaction of Cu+‚ produced
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Finland 2005 Producer price index for services Pricing methods by Aurél Kenessey (CBS‚ Netherlands) Benoît Buisson (INSEE‚ France) Richard McKenzie (OECD) 2 1. Introduction The term pricing method in the context of compiling price indices would probably be regarded by most price statisticians as a common concept. However when one attempts to find a definition for this concept‚ or indeed a definition for various types of pricing methods‚ the inadequacy of the current literature becomes apparent
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SCIENCE TEST #1 SEPTEMBER 2013 I. SCIENTIFIC METHOD a. The scientific method steps are: 1. Problem or question 2. Hypothesis 3. Experiment 4. Data 5. Conclusion b. The scientific method is a logical organized mechanism for identifying and researching a problem and devising a strategy for solving it. c. In the problem or question step‚ the researcher must decide what it is that you will be studying what you wish to learn.
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Delphi method∗ Abstract The Delphi method was originally developed in the 50s by the RAND Corporation in Santa Monica‚ California. This approach consists of a survey conducted in two or more rounds and provides the participants in the second round with the results of the first so that they can alter the original assessments if they want to - or stick to their previous opinion. Nobody ‘looses face’ because the survey is done anonymously using a questionnaire (the first Delphis were panels)
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technology has introduced new methods for human beings to care for the environment and to protect earth’s natural resources. An alternate source of energy that this paper will be covering is wind power. This is not a new discovery but overtime it took a fresh and better tactic. History will reveal that hundreds of years ago‚ windmills were already use in Europe in wind farms with wind turbines in order to gain as much as wind energy as possible. This is an effective method in producing the maximum wind
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P D Y Chapter 3 1 0 2 SURFACE MINING METHODS REFERENCE: BULLIVANT‚ DA. Current Surface Mining Techniques. Journal for the Transportation of Materials in Bulk: Bulk Solids Handling‚ vol 7‚ n6‚ December 1987‚ pp827-833. 2.1 Ore reserves Suitable for Surface Mining Ore reserves suitable for surface mining can be classified initially as; Relatively horizontal stratified reserves with a thin or thick covering of overburden Stratified vein-type deposits with an inclination steeper
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