Extractive Metallurgy Minerals are naturally occurring chemical substances in the earth’s crust obtainable by mining. Out of many minerals in which a metal may be found‚ only a few are viable to be used as sources of that metal. Such minerals are known as ores. Examples: Galena‚ PbS‚ etc. It is usually contaminated with earthly or undesired materials known as gangue. The extraction and isolation of metals from ores involve the following major steps: • Concentration of the ore‚ • Isolation of the
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The goal of this study was to measure the oxygen consumption of goldfish in an ambient environment and dark environment and calculate if there was any difference in metabolism based on oxygen consumption. The experimental hypothesis was that the metabolic rate of the goldfish as measured by oxygen consumption differs in a dark environment than in an ambient environment. The null hypothesis was that the metabolic rate of the gold fish as measured by oxygen consumption does not differ in darkness versus
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Generations Have you ever thought about what it would be like to live in the past? The future? If one were to choose‚ are the future children going to be luckier than those that lived in the past conditions? 65 million people were born into the time period called “Generation Y.” Generation Y‚ who consists of those who were born between 1980 to 1999‚ are commonly compared to the Silent Generation because of the number of births. The Silent Generation is the generation of Americans born from roughly
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10.19.2011 TITLE: The Importance of Oxygen for Life PURPOSE: To determine whether test tubes filled with bacteria‚ a few salts‚ distilled water‚ and glucose would grow in the presence or absence of oxygen. By adding oxygen to certain tubes and withholding it from other tubes‚ one can determine which bacteria grow the most efficiently. HYPOTHESIS: The test tubes of bacteria with oxygen will grow and thrive over the test tubes without oxygen. METHODS: Using the data shown in Table 7-A-1
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What will happen if ancient people got computer? One day‚ in 800 B.C.‚ the people were farming as normal day. Suddenly‚ the person who was working on the left side found something on the ground. It was white box with black surface‚ which was quite shiny without getting sunlight. Everyone thought that is a treasure of god and tried to dig out as soon as possible. When they revealed about half of object from ground‚ they noticed another thing - the grey‚ round and handy thing that was connected
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What Happens to Non-Christians when they die? An Evaluation of various perspectives Felipe Palma A130101 Alphacrucis College: Baulkham Hills THE101: Understanding the Faith: A Survey of Christian Doctrine – Major Essay Due date: 10 May 2013 Submission date: 10 May 2012 Final word count: 2003 Plagiarism Quiz Score: 92% Plagiarism Quiz Completed: 30/3/13 I hereby declare that the following work in this assessment is my own‚ except where indicated
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In What’s the Worst That Could Happen? by Bruce Coville‚ Murphy has been thinking that his name and age is unlucky but really once the days go by things are usually not as bad as you think. When Murphy had a crush on Tiffany‚ Murphy thought that asking Tiffany out might go as bad as he thinks. Later on‚ Tiffany asks Murphy to be in a skit for the school and he accepts it. It says here his friend says‚ “Woah‚” he says‚ nudging me with his elbow. “Progress!” (Coville‚ 3) So after being asked to be
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waters‚ such as lakes and streams. Phosphates are essential to aquatic plant growth‚ but too much phosphate can lead to the growth of algae and results in an algae bloom. Too much algae can cause a decrease in the amount in dissolved oxygen in the water. Oxygen in water is affected in many different ways by phosphates Phosphorus is usually present in natural waters as phosphate(Mcwelsh and Raintree‚ 1998). Phosphates are present in fertilizers and laundry detergents and can enter the water from
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capacity so alkalinity is not usually of concern for most seawater and brackish water aquaculturists. 2. Biochemical oxygen demand ( and COD) It is a measure of the amount of oxygen required by bacteria‚ algae‚ sediments and chemicals over a set period of time. BOD is of importance in aquaculture because microbial degradation of organic matter is a major sink for dissolved oxygen‚ a highly important parameter for
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Oxygen Exchange and Transport Oxygen exchange or respiration takes place at a respiratory surface; a boundary between the external environment and the interior of the body. Gas exchange is the process by which oxygen and carbon dioxide (the respiratory gases) move in opposite directions across an organism’s respiratory membranes‚ between the air or water of the external environment and the body fluids of the internal environment. Oxygen is needed by cells to extract energy from organic molecules
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