...Instituto de Hidrología, Meteorología y Estudios Ambientales Ministerio de Ambiente, Vivienda y Desarrollo Territorial - República de Colombia PROGRAMA DE FISICOQUÍMICA AMBIENTAL Página 1 de 9 Código: TP0084 Fecha: 22/06/2004 Versión: 01 DETERMINACIÓN DE OXÍGENO DISUELTO MÉTODO YODOMÉTRICO MODIFICACIÓN DE AZIDA TÍTULO: DETERMINACIÓN DE OXIGENO DISUELTO POR EL MÉTODO YODOMÉTRICO MODIFICACIÓN DE AZIDA CÓDIGO: TP0084 VERSIÓN: 01 FECHA ÚLTIMA REVISIÓN: COPIA N°: ELABORADO POR: MARÍA STELLA GAITÁN INGENIERA DE ALIMENTOS REVISADO POR: ANA MARIA HERNÁNDEZ OFICIAL DE CALIDAD APROBADO POR: GUSTAVO ALFONSO COY COORDINADOR Instituto de Hidrología, Meteorología y Estudios Ambientales Ministerio de Ambiente, Vivienda y Desarrollo Territorial - República de Colombia PROGRAMA DE FISICOQUÍMICA AMBIENTAL Página 2 de 9 Código: TP0084 Fecha: 22/06/2004 Versión: 01 DETERMINACIÓN DE OXÍGENO DISUELTO MÉTODO YODOMÉTRICO MODIFICACIÓN DE AZIDA OXÍGENO DISUELTO MÉTODO YODOMÉTRICO - MODIFICACIÓN DE AZIDA 1. INTRODUCCIÓN 1.1 El oxígeno disuelto (OD) es necesario para la respiración de los microorganismos aerobios así como para otras formas de vida aerobia. No obstante, el oxígeno es ligeramente soluble en el agua; la cantidad real de oxígeno que puede estar presente en la solución está determinada por a) la solubilidad del gas, b) la presión parcial del gas en la atmósfera, c) la temperatura, y d) la pureza del agua (salinidad, sólidos suspendidos)...
Words: 3555 - Pages: 15
...First devised in 1889, the Winkler method is considered the "gold standard" for measuring the concentration of dissolved oxygen in a sample of water. Through a series of chemical reactions, the O2combines with iodine to form a golden yellow chemical. Therefore each oxygen molecule is associated with an iodine molecule, and we can measure oxygen by measuring the iodine. When the iodine is neutralized by the addition of sodium thiosulfate, the golden color disappears , and we can determine how much iodine (hence oxygen) was in the sample. (Note: some oxygen test kits use a starch indicator that turns the iodine solution from yellow to a deep blue color to make it easier to distinguish the color change.) Once the water sample is collected, it is important to "fix" the sample immediately. Phytoplankton, bacteria, and other organisms in the sample can quickly change the oxygen content of the sample through photosynthesis and respiration. The first step of the Winkler method is the addition of manganous sulfate (a source of manganese ions) to the sample, quickly followed by the addition of lithium hydroxide (a strong base) and potassium iodide (a source of iodine). In the presence of the strong base, each oxygen atom binds with a manganese ion to form a manganous hydroxide complex. This reaction creates a pale precipitate that will eventually sink to the bottom of the sample container. Sulfuric or sulfamic acid is added to the solution to reduce the pH and dissolve the precipitate...
Words: 435 - Pages: 2
...Dapper Laughs As I begin this assembly, I must apologise to the house as a whole. This assembly does not have any motivational sporting or academic message, and unforgivably does not intertwine with current sporting events – with no reference to the staggering form of Wycombe Wanderers this season. So, as I have rudely broken this previously unmentioned tradition of Ridley House assembly, I can only reassure you that all shall be returned to normality next week. From Private Walker in Dad’s Army to Mickey Pearce in Only Fools and Horses, encompassing Gaz from Geordie Shore, Jay from The Inbetweeners, Mark Wright from TOWIE, and many more, audiences have habitually been entertained by the “woman-hungry geezer” character of popular culture. This product of 21st century Britain, characterised by stand alone augmented biceps, dressed usually in some form of vest top with ‘Hype.’ or ‘Ibiza’ scrawled across its front, with a haircut suspiciously similar to my own, these dubious alpha-males frequent most urban centres of the UK. But lads will be lads. Compared to similar figures of the past, there’s a moment in the opening credits of Happy Days where the Fonz approaches a mirror to perfect his quiff, then realises he is, in fact, already staring at the vision of perfection. Though such actions of the Fonz are ridiculous and ego-driven, they are loveable and above all – harmless. However, his perception that the opposite sex were mainly non-thinking vessels put on earth as future...
Words: 869 - Pages: 4
...EXPERIMENT 11: DETERMINATION OF DISSOLVED OXYGEN IN A WATER SAMPLE (WINKLER METHOD) INTRODUCTION In an alkaline solution, dissolved oxygen will oxidize manganese(II) to the trivalent state. 8OH-(aq) + 4Mn2+(aq) + 2H2O(l) －－＞ 4Mn(OH)3(s) The analysis is completed by titrating the iodine produced from potassium iodide by manganese(III) hydroxide. 2Mn(OH)3(s) + 2I-(aq) + 6 H+(aq) －－＞ 2Mn2+(aq) + I2(aq) + 6H2O(l) Sodium thiosulphate is used as the titrant. Success of the method is critically dependent upon the manner in which the sample is manipulated. At all stages, every method must be made to assure that oxygen is neither introduced to nor lost from the sample. Furthermore, the sample must be free of any solutes that will oxidize iodide or reduce iodine. Chemicals: Manganese(II) sulphate solution – prepared by dissolving 48 g of MnSO4.4H2O in water to five 100 cm3 solution; alkaline potassium iodide solution—prepared by dissolving 15 g of KI in about 25 cm3 of water, adding 66 cm3 of 50% NaOH, and diluting to 100 cm3; concentrated sulphuriv(VI) acid; 0.0125 M sodium thiosulphate solution; starch solution (freshly prepared). Apparatus: 250 cm3 volumetric flask, 250 cm3 conical flask, measuring cylinders, titration apparatus, magnetic stirrer Procedure: 1. Use a 250 cm3 volumetric flask to collect water sample. Fill the flask completely with water without trapping any air bubbles. 2. Add 1 cm3 of manganese(II) sulphate solution to the sample using a pipette...
Words: 538 - Pages: 3
...Riki Shafier Professor Kimberlee Hoftiezer SOS-110 24 January 2016 Music Education: A Personal Journey For the past few years I have been taking different courses, learning many things and preparing myself for the life ahead of me. As a soon-to-be college graduate, the future beckons, bright and inviting. There are endless career opportunities that await those who have put forth the effort to receive an education. The career goals toward which I am currently preparing are to become a highly sought-after piano teacher and piano-teacher trainer with a full roster of students, complete with a waiting list for those who wish to join my studio. I plan to build a fully- developed business model for my piano studio. This plan will include curricula for various ages and skill levels, as well as plans for accommodating specific needs of individual students. The plan will also have processes for the acceptance and rejection of potential students, registration and payment options, and online booking opportunities. This will be optimized through the use of technology. Technology, in all its many forms, has transformed the world we live in, and I anticipate that it will prove to be of great use to me in the development of my career goals. In the short-term, I will be able to train under experienced piano educators and teacher-trainers via Skype lessons and workshops, and use various training software programs to improve my technical and teaching skills. Additionally, I plan to...
Words: 849 - Pages: 4
...Blue Pelican Java by Charles E. Cook Version 3.0.5h Copyright © 2004 - 2008 by Charles E. Cook; Refugio, Tx (All rights reserved) 1-1 “Blue Pelican Java,” by Charles E. Cook. ISBN 1-58939-758-4. Published 2005 by Virtualbookworm.com Publishing Inc., P.O. Box 9949, College Station, Tx 77842, US. ©2005, Charles E. Cook. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, recording or otherwise, without the prior written permission of Charles E. Cook. Manufactured in the United States of America. Preface You will find this book to be somewhat unusual. Most computer science texts will begin with a section on the history of computers and then with a flurry of definitions that are just “so many words” to the average student. My approach with Blue Pelican Java is to first give the student some experience upon which to hang the definitions that come later, and consequently, make them more meaningful. This book does have a history section in Appendix S and plenty of definitions later when the student is ready for them. If you will look at Lesson 1, you will see that we go right to work and write a program the very first day. The student will not understand several things about that first program, yet he can immediately make the computer do something useful. This work ethic is typical of the remainder of the book. Rest assured that full understanding...
Words: 31284 - Pages: 126
...Researching Variable Naming Rules Visual Basic You must use a letter as the first character. You can't use a space, period (.), exclamation mark (!), or the characters @, &, $, # in the name. Name can't exceed 255 characters in length. Generally, you shouldn't use any names that are the same as the functions, statements, and methods in Visual Basic. You end up shadowing the same keywords in the language. To use an intrinsic language function, statement, or method that conflicts with an assigned name, you must explicitly identify it. Precede the intrinsic function, statement, or method name with the name of the associated type library. For example, if you have a variable called Left, you can only invoke the Left function using VBA.Left. You can't repeat names within the same level of scope. For example, you can't declare two variables named age within the same procedure. However, you can declare a private variable named age and a procedure-level variable named age within the same module. Python Must begin with a letter (a - z, A - B) or underscore (_) Other characters can be letters, numbers or _ Case Sensitive Can be any (reasonable) length There are some reserved words which you cannot use as a variable name because Python uses them for other things.- See more at: http://www.w3resource.com/python/python-variable.php#sthash.5AXuVlWN.dpuf Java Variable names are case-sensitive. A variable's name can be any legal identifier — an unlimited-length...
Words: 724 - Pages: 3
...SD2720 Module 3 Working with Methods Click Link Below To Buy: http://hwcampus.com/shop/sd2720-module-3-working-with-methods/ SD2720 Module 3 Working with Methods and Encapsulation Lab 3.1 Creating a Method In this lab, you will complete two tasks related to Java methods. The tasks performed in this lab will help you use method overloading and understand ambiguous overloading. Task 1 Write a program for swapping two numbers. In the program: • Create a method by passing primitive values as parameters for checking the result. • Create another method by passing object references as parameters for checking the result. • Identify the difference between two outputs. Task 2 Write a Java program that accepts 10 numbers from the user and finds the greatest and smallest numbers among them. Create two methods, findGreatest() and findSmallest(), to find the greatest and smallest numbers, respectively. Task 3 Write a Java program that implements the following methods: • getNumbers()to accept two numbers from the user. • calculateHCD()to calculate the highest common divisor (HCD) of the two numbers. Please note that it should be a recursive function. • calculateLCM()to calculate the least common multiple (LCM) of the two numbers. Display()to display HCD and LCM. Submission Requirements: Compress your Java project folder and responses in a Microsoft Word document into one zipped folder and submit it to the instructor. Evaluation Criteria:...
Words: 384 - Pages: 2
...A Programmer’s Guide to Java™ SCJP Certification Third Edition This page intentionally left blank A Programmer’s Guide to Java™ SCJP Certification A Comprehensive Primer Third Edition Khalid A. Mughal Rolf W. Rasmussen Upper Saddle River, New Jersey • Boston • Indianapolis • San Francisco New York • Toronto • Montreal • London • Munich • Paris • Madrid Capetown • Sidney • Tokyo • Singapore • Mexico City Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the publisher was aware of a trademark claim, the designations have been printed with initial capital letters or in all capitals. The authors and publisher have taken care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained herein. The publisher offers excellent discounts on this book when ordered in quantity for bulk purchases or special sales, which may include electronic versions and/or custom covers and content particular to your business, training goals, marketing focus, and branding interests. For more information, please contact: U.S. Corporate and Government Sales (800) 382-3419 corpsales@pearsontechgroup.com For sales outside the United...
Words: 15086 - Pages: 61
...Visual Basic – Messages and data input/output Introduction One way for a user to communicate with a procedure is via a dialogue box. The easiest way to do this in VB is to use one of the pre-defined ones. VB has two kinds, a Message box and an Input box. Message box The MsgBox function displays a message, waits for the user to click a button and returns a value indicating which button has been chosen. The simplest MsgBox contains only a message string and an OK button. The general syntax is MsgBox(prompt [,buttons] [,title]), where the quantities within [] are optional arguments, with prompt: string expression displayed in the message (max length 1024 characters) buttons: numerical expression that is sum of values specifying the type of buttons to display, title: string expression displayed in the title bar. Some of the button values are given below. (For a full list see the Help file). Value Constant Display 0 vbOKOnly OK button only 1 vbOKCancel OK and Cancel buttons 3 vbYesNoCancel Yes, No and Cancel buttons 4 vbYesNo Yes and No buttons 32 vbQuestion Query icon 48 vbExclamation Warning message icon 0 vbDefaultButton1 First button is default 256 vbDefaultButton2 Second button is default 512 vbDefaultButton3 Third button is default The value returned by the MsgBox function depends on the button pressed. Some values are listed below. Button selected Value Constant OK 1 vbOK Cancel 2 vbCancel Yes 6 vbYes No 7 vbNo The MsgBox function can be used as a simple debug tool. To...
Words: 930 - Pages: 4
.... MC 1. (TCO 13) Text files are what type of file? 4 Points : Sequential Random access Binary Consecutive Instructor Explanation: Lecture / Chapter 13 Edit 3. MC 1. Delete (TCO 13) To create an input file object, what kind of type would you use? 4 Points : ifstream ofstream fstream instream Instructor Explanation: Lecture / Chapter 13.1 Introduction Edit 4. MC 1. Delete (TCO 13) To create an output file object, what kind of type would you use? 4 Points : ifstream ofstream fstream instream Instructor Explanation: Lecture / Chapter 13.1 Introduction Edit 5. MC 1. Delete (TCO 13) The header file that defines the classes for processing and manipulating files is called the _____. 4 Points : Instructor Explanation: Chapter 13.1 Introduction Edit 6. 7. 8. MC 2. Delete (TCO 13) What do the following statements accomplish? ifstream theFile; theFile.open( myFile.txt , ios::in); 4 Points : Opens myFile in read mode Opens myFile in append mode Creates an empty file named myFile Opens a file in input mode to write to Instructor Explanation: Lecture / Chapter 13 Edit 9. MC 2. Delete (TCO 13) What do the following statements accomplish? ofstream theFile; theFile.open( myFile.txt , ios::out); 4 Points : Opens myFile in read mode Opens myFile in append mode Creates an empty file named myFile Opens a file in input mode to write to Instructor Explanation: Lecture / Chapter 13 Edit...
Words: 2540 - Pages: 11
...Kelli Okuly PT1420 Unit 2 Research Assignment 12-5-2014 Variable naming conventions vary from program to program. In Visual Basic the variable must begin with a letter and you cannot use a space, period (.), or the characters !, @, &, $, # in the name. Visual Basic variable names must be under 255 characters long. You shouldn't use any names that are the same as the functions, statements, and methods in Visual Basic. You end up shadowing the same keywords in the language. To use a basic language function, statement, or method that conflicts with an assigned name, you must explicitly identify it. Precede the fundamental function, statement, or method name with the name of the associated type library. For example, if you have a variable called “Left”, you can only use the “Left” function using “VBA.Left”. In Python, variables must begin with a letter or underscore (_). Other characters can be letters, numbers, or the underscore. Python variables are case sensitive and can be any length, within reason. There are several keywords in Python that are reserved for other functions and cannot be used as variables. For example; print, def, from, not, and return. Variables in Java are referred to as Identifiers. In Java the variable must begin with a letter, an underscore, or a dollar sign ($) although a letter is typically what is used. The other characters may be letters or numbers, no spaces or special characters are allowed. Java identifiers can be any length within...
Words: 405 - Pages: 2
...Layout Planning Models, Algorithms and computerized l h d d Layout Planning References 1. Tompikins et al., Facility Planning, 3rd edition, John Wiley & Sons Ltd., Singapore,2003. i 2003 2. Richard L.Francis et al., Facility Layout and Location: an analytical d diti approch, 2nd edition, P ti H ll of I di Ltd 2002 h Prentice Hall f India Ltd., 2002. 3. Dr-Ing. Daniel Kitaw, Industrial Management and Engineering Economy 4-1 Introduction • The generation of layout alternatives is a critical step in the facilities planning process, since th l i th f iliti l i i the layout t selected will serve to establish the physical relationships between activities. 4-2 CONT’D • Which comes first, the material handling system or the facility layout? Centralized versus decentralized storage of work in i process(WIP), t li (WIP) tooling, and supplies d li Fixed path versus variable path handling The degree of automation used in handling The type of level of inventory control physical control, control, and computer control of materials. 4-3 Layout procedures • A number of different procedures have been developed to id the facilities l t aid th f iliti planner i d i i l in designing layouts. t Construction type Improvement type 4-4 Apples plant layout procedure • • • • • • • • • • Procure th b si d t P the basic data Analyze the basic data Design the productive process Plan the material flow pattern Consider the handling l h dli plan general material •...
Words: 2488 - Pages: 10
...Assignment 1: Fundamentals of Effective Communication in the Workplace Professor BUS 100 – Introduction to Business May 13, 2014 I work for a defense attorney, and I experience effective communication on a daily basis via email with co-workers and clients. However, I do feel that face-to-face communication is highly effective and important. With face-to-face meeting, the co-workers and clients directly receive the message, and feedback is instantly provided. Resolutions can be made easier during a face-to-face meeting rather than via email or phone conversations. About six months ago I was part of a financial turn around that was a result of successful face-to-face communication. The firm’s office that I work for is called McCallum Law Offices, and my position in the department is senior paralegal and office manager. We work closely with the justice department and handling the financial and critical situations of our client’s lives. A main part of my job was to reconcile financial reports, and have the senior attorney approve them, and then submit them for reimbursement. We were having major issues with the financials and how they accounts were being handled. As with most offices now communication is usually handled via e-mail. When you start having issues like we were, there is only one way to handle this and that is for everyone to be face to face. So if there are any issues they can be resolved immediately. Attorney offices can become very hectic...
Words: 526 - Pages: 3
...C# Development Rob Miles Edition 1.1 October 2009 Department of Computer Science University of Hull i Contents Introduction...................................................................................................................... 11 Welcome ............................................................................................................. 11 Reading the notes................................................................................................ 11 Getting a copy of the notes ................................................................................. 11 Computers 12 An Introduction to Computers .......................................................................................... 12 Hardware and Software ...................................................................................... 12 Data and Information ........................................................................................................ 13 Data Processing .................................................................................................. 13 Programmer’s Point:At the bottom there is always hardware ............................. 14 Programming Languages 15 What is Programming? ..................................................................................................... 15 From Problem to Program .................................................................................. 15 Programmer’s Point:The specification must always be there...
Words: 63379 - Pages: 254
