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
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Komron Sabbagh Prof. Rowe Anthropology 101 March 25‚ 2013 Elderly Human “Y” Chromosome The unearthing and examination of a tremendously infrequent African American “Y” chromosome goes back in time with regards to the most recent common ancestor for the “Y” chromosome ancestry to 338‚000 years ago. This period exists even older than the age of the most eldest known structurally contemporary human fossils. University of Arizona geneticists have revealed the most ancient known hereditary subdivision
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Universiti Tun Hussein Onn Malaysia Pusat Pengajian Sains Semester 1 2008/2009 BSM 2913 TEST 1 DURATION : 60 minutes ANSWER ALL QUESTIONS. 1. Given the function f ( x‚ y ) = x 2 + 2 y 2 − 1 a. Find the domain and range of the function. (2 marks) b. Sketch the contour map of the function f ( x‚ y ) using three level curves‚ c = 1‚ 2‚ 3 . (4 marks) c. Use 3D-contour map to sketch roughly the surface of f ( x‚ y ) . (2 marks) 2 4 x2 − y 2 ‚ x2 + 2 y 2 f ( x‚ y ) along x-
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“Intersex” is a general term used for a variety of conditions in which a person is born with a reproductive or sexual anatomy that doesn’t seem to fit the typical definitions of female or male. For example‚ a person might be born appearing to be female on the outside‚ but having mostly male-typical anatomy on the inside. Or a person may be born with genitals that seem to be in-between the usual male and female types—for example‚ a girl may be born with a noticeably large clitoris‚ or lacking a vaginal
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DATE PERFORMED: JANUARY 6‚ 2011 SPECTROPHOTOMETRIC DETERMINATION OF THE EQUILIBRIUM CONSTANT OF A REACTION ABSTRACT The objective of the experiment was to determine the equilibrium constant of the reaction forming ferric thiocyanate through the use of Spectrophotometry. For the calibration‚ five standard solutions were prepared‚ then their respective absorbance values that were obtained through the use of the spectrophotometer‚ were plotted versus the concentration of the analyte so that a calibration
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NAME : ZULHAIRI BIN MAMAT DATE : 24 AUGUST 2011 TITLE OF EXPERIMENT : DETERMINATION OF THE RELATIVE MOLECULAR MASS OF AMIDOSULPHURIC ACID DATA COLLECTION AND PROCESSING. QUANTITATIVE DATA Type equation here. Experiment | Burette reading / cm3 | Volume of solution used(±0.1 cm3) | | Initial reading(± 0.05 cm3) | Final reading(± 0.05 cm3) | | 1 | 0.00 | 24.70 | 24.7 |
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The Use of Cooling Curves in the Determination of the Phase Diagram for a Lead-Tin System V.O.L.Tabell Department of Mining‚ Metallurgical and Materials Engineering University of the Philippines‚ Diliman vo_tabell@yahoo.com Abstract This paper discusses the use of the cooling curves in the determination of the phase diagram of a Lead-Tin system. The inflection points of these cooling curves were obtained by melting a series of mixtures of lead and tin at varying compositions. These critical
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On the other hand‚ in the article When Self-Determination Runs Amok by Callahan‚ he explores the concept of active and passive euthanasia‚ but for him it’s not so much of an ethical debate – as it is for Rachels – but rather divides his theory into three parts. First‚ he speaks about the legitimate conditions under which an individual may kill another. Secondly‚ he speaks about meaning and limits of self determination‚ arguing that this type of view only leads to a "idiosyncratic view of the good
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INTRODUCTION Alkaline phosphatase catalyses the hudrolysis of p-nitrophenyl phosphate (a synthetic substrate) at an optimum pH of 10.0 with the liberation of p-nitrophenol. The substrate is colourless‚ but the product p-nitrophenol is yellow in alkaline solution‚ absorbing maximally at 405 nrn. Thus a convenient assay for this enzyme involves monitoring the change in absorbance of the reaction medium at 405 nm. Exergonic (i.e energy producing reactions) exhibit a negative free energy change
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Doodle’s Determination In the short story "The Scarlet Ibis" by James Hurst‚ Doodle is an ugly duckling’ of a little boy and an invalid. Despised by‚ and an embarrassment to his older brother‚ Doodle is a seeming candidate for low self-esteem. He has no friends and rarely leaves the house. His older brother begins to take interest in Doodle’s physical progress and takes him under his wing. Through Doodle’s battle to earn his brothers respect he shows extreme courage ad determination. Doodle
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