Standard Methods for the Examination of Water and Wastewater 5210 BIOCHEMICAL OXYGEN DEMAND (BOD)*#(1) 5220 CHEMICAL OXYGEN DEMAND (COD)*#(2) 5220 A. Introduction Chemical oxygen demand (COD) is defined as the amount of a specified oxidant that reacts with the sample under controlled conditions. The quantity of oxidant consumed is expressed in terms of its oxygen equivalence. Because of its unique chemical properties‚ the dichromate ion (Cr2O72–) is the specified oxidant in Methods
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replenishment and lead times are not known with certainty-in such cases an investment in safety stocks is necessary if customer service is to be maintained at acceptable levels * Meet unexpected demands or demands for customization of products as with agile production * Smooth seasonal or cyclical demand * Take advantage of lots or purchase quantities in excess of what is required for immediate consumption to take advantage of price and quantity discounts * Hedge against anticipated shortage
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Biochemical Oxygen Demand (BOD) Biochemical Oxygen Demand‚ BOD‚ as it is commonly abbreviated‚ is one of the most important and useful parameters (measured characteristics) indicating the organic strength of a wastewater. BOD measurement permits an estimate of the waste strength in terms of the amount of dissolved oxygen required to break down the wastewater. The specifics of the analysis are discussed in detail in Standard Methods for the Examination of Water and Wastewater. The BOD test is
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1. Supply and Demand Economists Are a Joke? ________________________________________ A smarty-pants old story says that if you want a "learned economist‚" all you have to do is get a parrot and train the bird to squawk "supply and demand" in response to every question. Not fair‚ but ... It ’s true that the "theory of supply and demand" is a central part of economics. It is widely applicable‚ and also is a model of the way economists try to think most problems through‚ even when the theory of
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Guess Which One is one of many print advertisements in an advertising campaign made by an American organization called “Moms Demand Action”. The purpose of the ad is to persuade people with opposing viewpoints to join the fight for implementing safer gun laws in America. Despite being about a controversial topic‚ this campaign has been highly successful in persuading local legislators to change to safer gun policies. More effective than other texts in this genre‚ the advertisement is able to successfully
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Price elasticity of demand In economics and business studies‚ the price elasticity of demand (PED) is an elasticity that measures the nature and degree of the relationship between changes in quantity demanded of a good and changes in its price. Introduction When the price of a good falls‚ the quantity consumers demand of the good typically rises; if it costs less‚ consumers buy more. Price elasticity of demand measures the responsiveness of a change in quantity demanded for a good or service to
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Assignment 1 Making Decisions Based on Demand and Forecasting July 22‚ 2013 Using the sample data: The Demand for Pizza‚ (shown below) I will conduct a demand analysis and forecast for pizza. Through this analysis‚ I make a decision whether Domino’s should establish a presence in the community depicted in the sample data. The sample data included one dependent variable (Y) Quantity demanded and three independent variables (X1) price of pizza (X2) Tuition (X3) Price of Soft drinks and (4)
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1) Running regression analysis on data for 24 cities‚ Excel Data Analysis output is Regression Statistics Multiple R 0.9693 R Square 0.9396 Adjusted R Square 0.9306 Standard Error 188.2038 Observations 24 ANOVA df SS MS F Significance F Regression 3 11022960 3674320 103.73 2.3E-12 Residual 20 708414 35420.68 Total 23 11731374 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Intercept 2308.5 219.9996
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Introduction Aggregate demand is normally understood in the context of the total value of goods and services demanded by a given group of consumers at a given time period and at a given price (Brux 2007‚ p. 375). In other words‚ aggregate demand essentially refers to the value of goods and services consumers are willing to purchase at various price levels. In certain economic literature‚ the aggregate demand is often referred to as the ‘effective demand’ but it bears close similarity to the gross
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The Warwick MBA Assignment Cover Sheet Submitted by: 1267499 Date Sent: 15 April 2013 Module Title: Economics For Business Environment Module Code: EBE Date/Year of Module: 2013 Submission Deadline: 17 April 2013 Word Count: 1180 Number of Pages: 8 (including this) Question: Mid Module Assignment for EBE “This is to certify that the work I am submitting is my own. All external references and sources are clearly acknowledged and identified within the contents. I am aware of the University
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