Toxicological Profile for Zinc
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Title Effect of Ph Values on the Formation and Solubility Of
CORE Metadata, citation and similar papers at core.ac.uk Provided by Kyoto University Research Information Repository Effect of pH Values on the Formation and Solubility of Zinc Title Compounds Takada, Toshio; Kiyama, Masao; Torii, Hideo; Asai, Author(s) Toshihiro; Takano, Mikio; Nakanishi, Norihiko Bulletin of the Institute for Chemical Research, Kyoto Citation University (1978), 56(5): 242-246 Issue Date 1978-12-20 URL http://hdl.handle.net/2433/76795 Right Type Departmental Bulletin Paper Textversion publisher Kyoto University Bull.Inst. Chem.Res., Kyoto Univ., Vol. 56, No. 5, 1978 Effect of pH Values on the Formation and Solubility of Zinc Compounds Toshio TAKADA,Masao KIYAMA,Hideo TORII, Toshihiro AsAI* Mikio TAKANO**,and Norihiko NAKANISHI** ReceivedJuly 31, 1978 Aqueoussuspensions, prepared by mixingthe solution of NaOHand that ofzinc sulfate,chloride or nitrate,were subjected to agingat 25,50, and 70°C. Examinationof the productsby X-ray pow- der diffractionshowed that zinc oxide,basic zinc sulfate, chloride and nitrate are formeddepending mainlyon the pH. Their solubilitiesin the suspensionmedia with differentpH valueswere deter- mined at 25°C. INTRODUCTION In our laboratory, iron oxides and oxide hydroxides were prepared by wet methods such as the hydrolysis and slow oxidation of aqueous solutions of iron salts. The condi- tions for the formation of the oxides and oxide hydroxides') were reported together with their properties.2l The formation of a variety of products must be considered to be due to the difference in the nature -
Activated Carbon in Sediment Remediation
ACTIVATED CARBON IN SEDIMENT REMEDIATION. BENEFITS, RISKS AND PERSPECTIVES Darya KUPRYIANCHYK Thesis committee Promoter Prof. dr. A.A. Koelmans Professor Water and Sediment Quality Co-promoter Dr. ir. J.T.C. Grotenhuis Assistant professor Environmental Technology Other members Prof. dr. R.N.J. Comans, Wageningen University Prof. dr. ir. W.J.G.M. Peijnenburg, RIVM, Leiden University Prof. dr. ir. A.J. Hendriks, Radboud University Nijmegen Dr. ir. M.T.O. Jonker, Utrecht University This research was conducted under the auspices of the Graduate School for Socio-Economic and Natural Sciences of the Environment (SENSE). ACTIVATED CARBON IN SEDIMENT REMEDIATION. BENEFITS, RISKS AND PERSPECTIVES Darya KUPRYIANCHYK Thesis submitted in fulfilment of the requirements for the degree of doctor at Wageningen University by the authority of the Rector Magnificus Prof. dr. M.J. Kropff, in the presence of the Thesis Committee appointed by the Academic Board to be defended in public on Friday 1 February 2013 at 4.00 p.m. in the Aula Darya Kupryianchyk Activated carbon in sediment remediation. Benefits, risks and perspectives 264 pages. Thesis, Wageningen University, Wageningen, The Netherlands (2013) With references and summaries in English and Dutch ISBN 978-94-6173-431-0 To my mother “who told me songs were for the birds, then taught me all the tunes I know and a good deal of the words.” Ken Kesey Contents Chapter 1. General introduction....................................................................................... 9 Chapter 2. In situ remediation of contaminated sediments using carbonaceous materials. A review......................................................................................... 17 Chapter 3. In situ sorption of hydrophobic organic compounds to sediment amended with activated carbon..................................................................................... -
Evolution and Understanding of the D-Block Elements in the Periodic Table Cite This: Dalton Trans., 2019, 48, 9408 Edwin C
Dalton Transactions View Article Online PERSPECTIVE View Journal | View Issue Evolution and understanding of the d-block elements in the periodic table Cite this: Dalton Trans., 2019, 48, 9408 Edwin C. Constable Received 20th February 2019, The d-block elements have played an essential role in the development of our present understanding of Accepted 6th March 2019 chemistry and in the evolution of the periodic table. On the occasion of the sesquicentenniel of the dis- DOI: 10.1039/c9dt00765b covery of the periodic table by Mendeleev, it is appropriate to look at how these metals have influenced rsc.li/dalton our understanding of periodicity and the relationships between elements. Introduction and periodic tables concerning objects as diverse as fruit, veg- etables, beer, cartoon characters, and superheroes abound in In the year 2019 we celebrate the sesquicentennial of the publi- our connected world.7 Creative Commons Attribution-NonCommercial 3.0 Unported Licence. cation of the first modern form of the periodic table by In the commonly encountered medium or long forms of Mendeleev (alternatively transliterated as Mendelejew, the periodic table, the central portion is occupied by the Mendelejeff, Mendeléeff, and Mendeléyev from the Cyrillic d-block elements, commonly known as the transition elements ).1 The periodic table lies at the core of our under- or transition metals. These elements have played a critical rôle standing of the properties of, and the relationships between, in our understanding of modern chemistry and have proved to the 118 elements currently known (Fig. 1).2 A chemist can look be the touchstones for many theories of valence and bonding. -
Fish Bioconcentration Data Requirement: Guidance for Selection of Number of Treatment Concentrations
Document ID No.: EPA 705-G-2020-3708 Fish Bioconcentration Data Requirement: Guidance for Selection of Number of Treatment Concentrations [Supplement to OCSPP Test Guideline 850.1730] July 15, 2020 Disclaimer: The contents of this document do not have the force and effect of law and are not meant to bind the public in any way. This document is intended only to provide clarity to the public regarding existing requirements under the law or agency policies. Office of Pesticide Programs Office of Chemical Safety and Pollution Prevention U.S. Environmental Protection Agency I. Purpose The purpose of this document is to clarify EPA recommendations for the number of treatment concentrations needed to result in acceptable fish bioconcentration factor (BCF) studies for pesticide registration. EPA routinely requires BCF studies to determine whether pesticide active ingredients have the potential to accumulate in fish, enter the food chain, and cause adverse effects in fish-eating predators such as aquatic mammals and birds of prey. In April 2017, EPA was approached by an outside party, the National Centre for the Replacement, Refinement and Reduction of Animals in Research (NC3R), with a suggestion to modify the test guideline for the BCF study to reduce the number of animals used in BCF testing, by reducing the number of concentration levels used from three (two positive doses and one control) to two (one positive level and one control). NC3R stated that this would be “[i]n the interest of international harmonization and reducing unnecessary animal testing” because “[a]t the moment the Japanese and US EPA guideline require that two concentrations are always tested, which is in contrast to the OECD Test Guideline[1]; therefore, many companies are understandably continuing to test two concentrations to ensure acceptance within these regions.” This modification has the potential to reduce the number of fish used by one-third. -
Equine Laminitis Managing Pasture to Reduce the Risk
Equine Laminitis Managing pasture to reduce the risk RIRDCnew ideas for rural Australia © 2010 Rural Industries Research and Development Corporation. All rights reserved. ISBN 978 1 74254 036 8 ISSN 1440-6845 Equine Laminitis - Managing pasture to reduce the risk Publication No. 10/063 Project No.PRJ-000526 The information contained in this publication is intended for general use to assist public knowledge and discussion and to help improve the development of sustainable regions. You must not rely on any information contained in this publication without taking specialist advice relevant to your particular circumstances. While reasonable care has been taken in preparing this publication to ensure that information is true and correct, the Commonwealth of Australia gives no assurance as to the accuracy of any information in this publication. The Commonwealth of Australia, the Rural Industries Research and Development Corporation (RIRDC), the authors or contributors expressly disclaim, to the maximum extent permitted by law, all responsibility and liability to any person, arising directly or indirectly from any act or omission, or for any consequences of any such act or omission, made in reliance on the contents of this publication, whether or not caused by any negligence on the part of the Commonwealth of Australia, RIRDC, the authors or contributors. The Commonwealth of Australia does not necessarily endorse the views in this publication. This publication is copyright. Apart from any use as permitted under the Copyright Act 1968, all other rights are reserved. However, wide dissemination is encouraged. Requests and inquiries concerning reproduction and rights should be addressed to the RIRDC Publications Manager on phone 02 6271 4165. -
Improving the Scintillation Performance of Ksr2i5:Ce3+ Through Exploration of Activator Concentration and Growth Conditions
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Masters Theses Graduate School 5-2019 Improving the Scintillation Performance of KSr2I5:Ce3+ through Exploration of Activator Concentration and Growth Conditions Eleanor Paige Comer University of Tennessee, [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_gradthes Recommended Citation Comer, Eleanor Paige, "Improving the Scintillation Performance of KSr2I5:Ce3+ through Exploration of Activator Concentration and Growth Conditions. " Master's Thesis, University of Tennessee, 2019. https://trace.tennessee.edu/utk_gradthes/5414 This Thesis is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Masters Theses by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a thesis written by Eleanor Paige Comer entitled "Improving the Scintillation Performance of KSr2I5:Ce3+ through Exploration of Activator Concentration and Growth Conditions." I have examined the final electronic copy of this thesis for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Master of Science, with a major in Nuclear Engineering. Charles L. Melcher, Major Professor We have read this thesis and recommend its acceptance: Mariya Zhuravleva, Eric Lukosi Accepted for the Council: Dixie L. Thompson Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) Improving the Scintillation Performance of KSr2I5:Ce3+ through Exploration of Activator Concentration and Growth Conditions A Thesis Presented for the Master of Science Degree The University of Tennessee, Knoxville Eleanor Paige Comer May 2019 Copyright © 2019 by Eleanor P. -
Evaluation of Metal and Noise Exposures at an Aircraft Powerplant Parts Manufacturer
Evaluation of Metal and Noise Exposures at an Aircraft Powerplant Parts Manufacturer HHE Report No. 2018-0001-3349 April 2019 Authors: Karl D. Feldmann, MS, CIH David A. Jackson, MD Analytical Support: Jennifer Roberts, Maxxam Analytics Desktop Publisher: Jennifer Tyrawski Editor: Cheryl Hamilton Industrial Hygiene Field Assistance: Scott Brueck, Jessica Li, Kevin Moore Logistics: Donnie Booher, Kevin Moore, Mihir Patel Medical Field Assistance: Deborah Sammons, Miriam Siegel Statistical Support: Miriam Siegel Keywords: North American Industry Classification System (NAICS) Code 336412 (Aircraft Engine and Engine Parts Manufacturing), Oregon, Welding, Tungsten Inert Gas, TIG Welding, Inconel, Stainless Steel, Chromium, Hexavalent Chromium, Hex Chrome, Chrome Six, Chrome 6, Chrome IV, Crvi, Cr(VI), Nickel, Cobalt, Biomonitoring, BEI, Noise Disclaimer The Health Hazard Evaluation Program investigates possible health hazards in the workplace under the authority of the Occupational Safety and Health Act of 1970 [29 USC 669a(6)]. The Health Hazard Evaluation Program also provides, upon request, technical assistance to federal, state, and local agencies to investigate occupational health hazards and to prevent occupational disease or injury. Regulations guiding the Program can be found in Title 42, Code of Federal Regulations, Part 85; Requests for Health Hazard Evaluations [42 CFR Part 85]. Availability of Report Copies of this report have been sent to the employer and employee representative at the facility. The state and local health department and the Occupational Safety and Health Administration Regional Office have also received a copy. This report is not copyrighted and may be freely reproduced. Recommended Citation NIOSH [2019]. Evaluation of metal and noise exposures at an aircraft powerplant parts manufacturer. -
Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoic Acid (PFOA) November 2017 TECHNICAL FACT SHEET – PFOS and PFOA
Technical Fact Sheet – Perfluorooctane Sulfonate (PFOS) and Perfluorooctanoic Acid (PFOA) November 2017 TECHNICAL FACT SHEET – PFOS and PFOA Introduction At a Glance This fact sheet, developed by the U.S. Environmental Protection Agency Manmade chemicals not (EPA) Federal Facilities Restoration and Reuse Office (FFRRO), provides a naturally found in the summary of two contaminants of emerging concern, perfluorooctane environment. sulfonate (PFOS) and perfluorooctanoic acid (PFOA), including physical and Fluorinated compounds that chemical properties; environmental and health impacts; existing federal and repel oil and water. state guidelines; detection and treatment methods; and additional sources of information. This fact sheet is intended for use by site managers who may Used in a variety of industrial address these chemicals at cleanup sites or in drinking water supplies and and consumer products, such for those in a position to consider whether these chemicals should be added as carpet and clothing to the analytical suite for site investigations. treatments and firefighting foams. PFOS and PFOA are part of a larger group of chemicals called per- and Extremely persistent in the polyfluoroalkyl substances (PFASs). PFASs, which are highly fluorinated environment. aliphatic molecules, have been released to the environment through Known to bioaccumulate in industrial manufacturing and through use and disposal of PFAS-containing humans and wildlife. products (Liu and Mejia Avendano 2013). PFOS and PFOA are the most Readily absorbed after oral widely studied of the PFAS chemicals. PFOS and PFOA are persistent in the exposure. Accumulate environment and resistant to typical environmental degradation processes. primarily in the blood serum, As a result, they are widely distributed across all trophic levels and are found kidney and liver. -
ECETOC Guidance on Dose Selection
ECETOC Guidance on Dose Selection Technical Report No. 138 EUROPEAN CENTRE OFOR EC TOXICOLOGY AND TOXICOLOGY OF CHEMICALS ECETOC Guidance on Dose Selection ECETOC Guidance on Dose Selection Technical Report No. 138 Brussels, March 2021 ISSN-2079-1526-138 (online) ECETOC TR No. 138 1 ECETOC Guidance on Dose Selection 224504 ECETOC Technical Report No. 138 © Copyright – ECETOC AISBL European Centre for Ecotoxicology and Toxicology of Chemicals Rue Belliard 40, B-1040 Brussels, Belgium. All rights reserved. No part of this publication may be reproduced, copied, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the copyright holder. Applications to reproduce, store, copy or translate should be made to the Secretary General. ECETOC welcomes such applications. Reference to the document, its title and summary may be copied or abstracted in data retrieval systems without subsequent reference. The content of this document has been prepared and reviewed by experts on behalf of ECETOC with all possible care and from the available scientific information. It is provided for information only. ECETOC cannot accept any responsibility or liability and does not provide a warranty for any use or interpretation of the material contained in the publication. ECETOC TR No. 138 2 ECETOC Guidance on Dose Selection ECETOC Guidance on Dose Selection Table of Contents 1. SUMMARY 6 2. INTRODUCTION, BACKGROUND AND PRINCIPLES 9 2.1. Background and Principles 9 2.2. Current Regulatory Framework and Guidance 10 2.2.1. Historical perspectives and the evolution of test guidelines 10 2.2.2. -
For a Free Southem Africa- ·~
ECSA 339 lafayette Street New York, N.Y. 10012 Phone: (212) 477-0066 -For A Free Southem Africa- ·~ . , > .. "·' : . 15 May 1985 .. ' .,_ . PRETOR!A'S TREASON TRIALS The South African apartheid government is stag:i,.J1,g . and will stage a 'series of trials of opposition leaders on charges of high treason. One co~rt ~~se of 14 activists is und~r~ way in Johannesburg. A · ~ · etohd consi1?ting.. , ··-·. of 16 defencants' is centered in Dur:Pan. A third trial said to include 16 or· ~ore peo ple will snortly be announced. There may well be more. The trial in Durban has attracted the major attention because the 16 are from the top ranks of the United Democratic Front, the nation-wide organization comprised of over 600 community, student, trade union,church and professional groups formed in August 1983. The UDF stands for a non-racial, unitary and democratic South Africa. Two of the UDF's national presidents, Mr Archie Gumede and Ms Albertina Sisulu (pictured here) , .head th~ list. (The third president, Mr Oscar Mpetha, is awaiting an appeal on another , charge.) Officers of the progressive South African Allied Workers' Union, of the Natal Indian Congress and other UDF officials holding ·regiorial pos·itions as well complete the roster. These 16 fought a hard-won bail 'case but the terms of their temporary release amount virtually to house arrest: they must report to the South African Police twice a day, stay away ·from political meetings and remain at home from 9 pm to 6 am.--- Premria's aim is to destroy the UDF, to tie up its members either in or out of jail for months, even years of court proceedings : and· of course to convict them of being i~entical with the banned African National Congress which the regime charges ~i.th the violent overthrow of the state. -
=Four White Socks (GB)
equineline.com Product 40P 09/26/19 10:58:45 EDT =Four White Socks (GB) Chestnut Filly; Feb 24, 2015 Giant's Causeway, 97 ch Shamardal, 02 b Helsinki (GB), 93 b =Lope de Vega (IRE), 07 =Vettori (IRE), 92 b =Lady Vettori (GB), 97 b =Four White Socks (GB) ch =Lady Golconda (FR), 92 ch Foaled in Great Britain Danzig, 77 b Green Desert, 83 b Foreign Courier, 79 b =Peppermint Green (GB), Nashwan, 86 ch =One So Wonderful (GB),=Someone Special (GB), 83 b 04 b 94 b By LOPE DE VEGA (IRE) (2007). Hwt. in France, Stakes winner of $1,447,691 USA in France, Prix du Jockey Club-French Derby [G1], etc. Sire of 6 crops of racing age, 970 foals, 693 starters, 63 stakes winners, 2 champions, 451 winners of 1189 races and earning $43,967,785 USA, including Lim's Lightning (Champion in Singapore, $315,531 USA, Aushorse Golden Horseshoe [L], etc.), Lupie (Champion in Qatar, $146,145 USA), Belardo (Hwt. in Europe and England, $1,371,722 USA, Dubai Dewhurst S. [G1], etc.), Very Special (Hwt. in United Arab Emirates, $641,026 USA, EGA Cape Verdi [G2], etc.), Endless Drama (Hwt. in Ireland, to 7, 2019, $552,346 USA, Star Apollo S. [G2], etc.), Hero Look (Hwt. twice in Italy, $342,989 USA, Premio Gran Criterium [G2], etc.). 1st dam =PEPPERMINT GREEN (GB), by Green Desert. Unplaced in ENG. Dam of 6 foals, 4 to race, 2 winners-- =FOUR WHITE SOCKS (GB) (f. by =Lope de Vega (IRE)). Black type winner, see below. -
9.1 Appendix a Minimum Respiratory Protection for Cutting and Welding Processes
Safety Policy and Procedure Policy Number 015 Authorized By: The Cianbro Companies Alan Burton Title: Welding and Cutting Hazard Assessment Program Effective Date: 09/16/95 Page 1 of 12 1 Status 1.1 Update of existing policy, effective 06/03/11. 2 Purpose 2.1 To provide guidelines and requirements to protect team members from the hazards associated with welding, cutting, and burning operations. 3 Applicability 3.1 This policy applies to all subsidiary companies and departments of the Cianbro Companies. 3.2 All organizations are required to comply with the provisions of this policy and procedure. Any deviation, unless spelled out specifically in the policy, requires the permission of the Safety Director or designee. 4 Definitions 4.1 Adequate Ventilation: Used in this policy means any of the following: Local exhaust ventilation is used to capture fumes or in open area with adequate air movement or adequate dilution ventilation with directional air flow away from team member. 4.2 Air Arc (Carbon Arc): A cutting process by which metals are melted by the heat of an arc using a carbon electrode. Molten metal is forced away from the cut by a blast of forced air. 4.3 Bug-O BUG-O Systems Inc.: A manufacturer of a system of drives, carriages, rails and attachments designed to automate welding guns, cutting torches and other hand held tools. 4.4 Cad Welding: An exothermic (gives off heat) welding process that fuses conductors together to form a molecular bond with a current-carrying capacity equal to that of the conductor. Typically used in grounding systems.