Modified Winkler Method for Dissolved Oxygen Determination Tiffany T. Lee Department of Biological Sciences‚ College of Science University of Santo Tomas‚ Manila‚ Philippines 1008 Date of Submission: February 17‚ 2011 Abstract In this experiment‚ the Winkler Method was used to measure the dissolved oxygen (d.o.) in a water sample from the pond in the Arch of the Centuries which had the owl statues. Then‚ the amount of oxygen is determined through a series of reaction. Usually‚ Winkler
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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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AP Biology Dissolved Oxygen and Aquatic Primary Productivity Purpose: To measure and analyze the primary productivity of natural waters of laboratory cultures using screens to simulate the decrease of light with increasing depth. Background: Dissolved oxygen (DO) is how oxygen is measured. Oxygen is required in cellular respiration‚ so it is very important for aquatic life. When more oxygen is consumed than is produced‚ dissolved oxygen levels decline and some animals could die if they do not
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deforestation of our rainforests is effecting our environment and us more than you may think. We get the oxygen we need from trees‚ forests protect us from Carbon Dioxide‚ and forests protect most of Earth’s plants and animals. We need trees to breathe and rainforests to protect us from harsh things that we emit from our bodies. Many rainforests help and protect us. “More than 20% of the world’s oxygen comes from the Amazon” (Fraser 2)‚ the Amazon is an immense rainforest located in South America. There
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Through the Respiratory System By: Carmen Ventura Hi‚ my name is Roscoe. Let me tell you about my journey. Carmen Ventura KINE-1306 Professor Bustamante Roscoe’s Journey through the Respiratory System Hi my name is Roscoe and I am an oxygen cell. I was told by my grandfather Gene that I was a very important cell. He told me that when someone takes a breath they take in all types of molecules in the air including myself. My grandfather was a very wise man and whenever he talked I listened
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Oxygen and Air Nanobubble Water Solution Promote the Growth of Plants‚ Fishes‚ and Mice Kosuke Ebina1*‚ Kenrin Shi1‚ Makoto Hirao2‚ Jun Hashimoto3‚ Yoshitaka Kawato1‚ Shoichi Kaneshiro1‚ Tokimitsu Morimoto1‚ Kota Koizumi1‚ Hideki Yoshikawa1 1 Department of Orthopaedic Surgery‚ Graduate School of Medicine‚ Osaka University‚ Suita‚ Osaka‚ Japan‚ 2 Department of Orthopaedic Surgery‚ National Hospital Organization‚ Osaka Minami Medical Center‚ Kawachinagano‚ Osaka‚ Japan‚ 3 Department of Immunology‚
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These are the cells that transport oxygen in the blood from the lungs to the tissues. These cells also help transport some of the carbon dioxide from the tissues to the lungs. The main function of erythrocytes‚ namely oxygen transport‚ is carried out by the protein that makes up the majority of the protein composition of the cell‚ hemoglobin. We will also be looking at how hemoglobin delivers oxygen‚ and how many factors affect its affinity for oxygen. Lastly we will be looking at some
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Experiment IV Solubility of Dissolved Oxygen Purpose To demonstrate the effect of partial pressure‚ temperature and salinity on the solubility of dissolved oxygen and to demonstrate the interference of nitrite in dissolved oxygen analysis by the Winkler Method. To demonstrate the use of the oxygen electrode and the difference between activity and concentration. References 1. Mancy‚ K. H.‚ Jaffe‚ T.‚ "Analysis of Dissolved Oxygen in Natural and Waste Water‚" USDHEW Public Health Service
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Modified Winkler method for dissolved oxygen determination Abstract In this study the group has determined the presence of oxygen in sample through a modified winkler method. The amount of oxygen is determined through a series of reaction. A body of water can sustain life if dissolved oxygen is sufficed. Depletions in dissolved oxygen can cause major shifts in the kinds of aquatic organisms found in water bodies. Introduction The amount of dissolved oxygen present in water or wastewater is
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Oxygen (1770s) [pic] British educator and philosopher Joseph Priestley (1733 – 1804) discovered oxygen in experiments‚ isolated the gas‚ and described its function in combustion and respiration. He also invented soda or carbonated water by dissolving fixed air with water. Unaware of the significance of his discoveries and because of his stubborn refusal to abandon the phlogiston theory‚ he named the new gas “dephlogisticated air.” However‚ it would be the French chemist Antoine Lavoisier (1743
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