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Important Structures of AB2 Compounds
Important Structures of AB2 compounds AB2 compounds have many different structures but many of them belong to one of the following 5 types. Fluorite (CaF2) The fluorite structure is very unique in so far as the close-packed ions are the cations and not the anions. In normal cases, the anion is the larger ion but in the case of CaF2, Ca is larger than F hence the structure is based on a cubic close-packing of the Ca2+ ions. There are 8 tetrahedral - holes in the unit cell of CaF2 and they are all occupied by F ions. One can notice that the only difference between fluorite and sphalerite (ZnS) is that in sphalerite only 4 of the tetrahedral holes are filled. Every fluorine anion is surrounded tetrahedrally by 4 calcium cations and every calcium cation is surrounded cubically by 8 flourine ions. In other words in the fluorite structure a (8,4)-coordination is observed. Antifluorite The antifluorite structure gets its name from the fluorite structure because it’s just the opposite i.e. the cations occupy the tetrahedral holes as compared to the anions in the fluorite structure. In this structure a cubic close-packing of the anions is observed. For example in K2O the cubic close-packing is made by oxide and the potassium occupy all 8 tetrahedral holes. The oxygen anions are surrounded by 8 potassium cations in a cubic way and the potassium cations are surrounded tetrahedrally by 4 oxygen ((4,8)-coordination). Cadmium Chloride (CdCl2) - In CdCl2 we have a cubic close-packed array of Cl ions. -
Problem Formulation of the Risk Evaluation for Perchloroethylene (Ethene, 1,1,2,2-Tetrachloro)
EPA Document# EPA-740-R1-7017 May 2018 DRAFTUnited States Office of Chemical Safety and Environmental Protection Agency Pollution Prevention Problem Formulation of the Risk Evaluation for Perchloroethylene (Ethene, 1,1,2,2-Tetrachloro) CASRN: 127-18-4 May 2018 TABLE OF CONTENTS ABBREVIATIONS ............................................................................................................................ 8 EXECUTIVE SUMMARY .............................................................................................................. 11 1 INTRODUCTION .................................................................................................................... 14 1.1 Regulatory History ..................................................................................................................... 16 1.2 Assessment History .................................................................................................................... 16 1.3 Data and Information Collection ................................................................................................ 18 1.4 Data Screening During Problem Formulation ............................................................................ 19 2 PROBLEM FORMULATION ................................................................................................. 20 2.1 Physical and Chemical Properties .............................................................................................. 20 2.2 Conditions of Use ...................................................................................................................... -
2,4-Dichlorophenoxyacetic Acid
2,4-Dichlorophenoxyacetic acid 2,4-Dichlorophenoxyacetic acid IUPAC (2,4-dichlorophenoxy)acetic acid name 2,4-D Other hedonal names trinoxol Identifiers CAS [94-75-7] number SMILES OC(COC1=CC=C(Cl)C=C1Cl)=O ChemSpider 1441 ID Properties Molecular C H Cl O formula 8 6 2 3 Molar mass 221.04 g mol−1 Appearance white to yellow powder Melting point 140.5 °C (413.5 K) Boiling 160 °C (0.4 mm Hg) point Solubility in 900 mg/L (25 °C) water Related compounds Related 2,4,5-T, Dichlorprop compounds Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) 2,4-Dichlorophenoxyacetic acid (2,4-D) is a common systemic herbicide used in the control of broadleaf weeds. It is the most widely used herbicide in the world, and the third most commonly used in North America.[1] 2,4-D is also an important synthetic auxin, often used in laboratories for plant research and as a supplement in plant cell culture media such as MS medium. History 2,4-D was developed during World War II by a British team at Rothamsted Experimental Station, under the leadership of Judah Hirsch Quastel, aiming to increase crop yields for a nation at war.[citation needed] When it was commercially released in 1946, it became the first successful selective herbicide and allowed for greatly enhanced weed control in wheat, maize (corn), rice, and similar cereal grass crop, because it only kills dicots, leaving behind monocots. Mechanism of herbicide action 2,4-D is a synthetic auxin, which is a class of plant growth regulators. -
Fluorinated Polymers As Smart Materials for Advanced Biomedical Applications
polymers Review Fluorinated Polymers as Smart Materials for Advanced Biomedical Applications Vanessa F. Cardoso 1,2,* ID , Daniela M. Correia 3,4, Clarisse Ribeiro 1,5 ID , Margarida M. Fernandes 1,5 and Senentxu Lanceros-Méndez 4,6 1 Centro/Departamento de Física, Universidade do Minho, 4710-057 Braga, Portugal; cribeiro@fisica.uminho.pt (C.R.); margaridafernandes@fisica.uminho.pt (M.M.F.) 2 CMEMS-UMinho, Universidade do Minho, DEI, 4800-058 Guimaraes, Portugal 3 Departamento de Química e CQ-VR, Universidade de Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal; [email protected] 4 BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain; [email protected] 5 CEB—Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal 6 IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain * Correspondence: [email protected]; Tel.: +351-253-60-40-73 Received: 11 January 2018; Accepted: 6 February 2018; Published: 8 February 2018 Abstract: Fluorinated polymers constitute a unique class of materials that exhibit a combination of suitable properties for a wide range of applications, which mainly arise from their outstanding chemical resistance, thermal stability, low friction coefficients and electrical properties. Furthermore, those presenting stimuli-responsive properties have found widespread industrial and commercial applications, based on their ability to change in a controlled fashion one or more of their physicochemical properties, in response to single or multiple external stimuli such as light, temperature, electrical and magnetic fields, pH and/or biological signals. In particular, some fluorinated polymers have been intensively investigated and applied due to their piezoelectric, pyroelectric and ferroelectric properties in biomedical applications including controlled drug delivery systems, tissue engineering, microfluidic and artificial muscle actuators, among others. -
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wjpls, 2018, Vol. 4, Issue 8, 153-159 Research Article ISSN 2454-2229 Sathyamurthy et al. World Journal of Pharmaceutical World Journal and Lifeof Pharmaceutical Sciences and Life Sciences WJPLS www.wjpls.org SJIF Impact Factor: 5.088 GCMS AND FTIR ANALYSIS ON THE METHANOLIC EXTRACT OF RED VITIS VINIFERA PULP 1Naresh S., 1Sunil K. S., 1Akki Suma, 1Ashika B. D., 1Chitrali Laha Roy, *2Dr. Balasubramanian Sathyamurthy 1Department of Biochemistry, Ramaiah College of Arts, Science and Commerce, Bangalore – 560054. *2Professor, Department of Biochemistry, Ramaiah College of Arts, Science and Commerce, Bangalore – 560054. *Corresponding Author: Dr. Balasubramanian Sathyamurthy Department of Biochemistry, Ramaiah College of Arts, Science and Commerce, Bangalore – 560054. Article Received on 12/06/2018 Article Revised on 02/07/2018 Article Accepted on 23/07/2018 ABSTRACT Red Vitis Vinifera pulp has major components such as Organic acids, Malate, Tartrate and Sugars and contains higher moisture content. Our work is designed to identify the possible phytochemicals compounds present in the methanolic extract of red grape pulp by using GCMS along with functional group analysis through FTIR. From the GCMS analysis of red Vitis Vinifera pulp nearly 61 compounds were identified. By FTIR analysis, strong absorption band was found at 3400 cm–1, which represents the amine groups and ketones at a frequency of –1 1066.02 cm gave maximum peaks. Hence, we can conclude that the red Vitis Vinifera pulp extract is rich in amines, ether and ester groups. KEYWORDS: GCMS, FTIR, spectral analysis, NIST. 1. INTRODUCTION biochemical and organic mixtures and it is also highly compatible.[4] Infrared spectroscopy is most powerful Red Grapes or Vitis vinifera is a Berry fruit and belongs technique for materials analysis and used in the to the group of versatile fruits which are used in a wide laboratories. -
United States Patent (19) (11) 4,161,571 Yasui Et Al
United States Patent (19) (11) 4,161,571 Yasui et al. 45 Jul. 17, 1979 (54) PROCESS FOR PRODUCTION OF THE 4,080,493 3/1978 Yasui et al. .......................... 260/879 MALE CANHYDRDE ADDUCT OF A 4,082,817 4/1978 Imaizumi et al. ...................... 526/46 LIQUID POLYMER 4,091,198 5/1978 Smith ..................................... 526/56 75 Inventors: Seimei Yasui, Takarazuka; Takao FOREIGN PATENT DOCUMENTS Oshima, Sonehigashi, both of Japan 2262677 2/1975 France ....................................... 526/56 73) Assignee: Sumitomo Chemical Company, 44-1989 1/1969 Japan ......................................... 526/56 Limited, Osaka, Japan Primary Examiner-William F. Hamrock Attorney, Agent, or Firm-Birch, Stewart, Kolasch and 21 Appl. No.: 843,311 Birch 22 Filed: Oct. 18, 1977 57 ABSTRACT Related U.S. Application Data A process for production of the maleic anhydride ad duct of a liquid polymer having a maleic anhydride 62 Division of Ser. No. 733,914, Oct. 19, 1976, Pat, No. addition amount of 2 to 70% by weight, which com 4,080,493. prises reacting a liquid polymer having a molecular 51 Int. C.’................................................ CO8F 8/46 weight of 150 to 5,000 and a viscosity of 2 to 50,000 cp (52) U.S. C. ...................................... 526/90; 526/192; at 30 C. in the presence of at least one compound, as a 526/209; 526/213; 526/193; 526/195; 526/226; gelation inhibitor, selected from the group consisting of 526/233; 526/237; 526/238; 526/272; 525/285; imidazoles, thiazoles, metallic salts of mercapto 525/249; 525/251; 525/255; 525/245; 525/248 thiazoles, urea derivatives, naphthylamines, nitrosa (58) Field of Search ................ -
Delayed Fluorescence Imaging of Photosynthesis Inhibitor and Heavy Metal Induced Stress in Potato
Cent. Eur. J. Biol. • 7(3) • 2012 • 531-541 DOI: 10.2478/s11535-012-0038-z Central European Journal of Biology Delayed fluorescence imaging of photosynthesis inhibitor and heavy metal induced stress in potato Research Article Jaka Razinger1,*, Luka Drinovec2, Maja Berden-Zrimec3 1Agricultural Institute of Slovenia, 1000 Ljubljana, Slovenia 2Aerosol d.o.o., 1000 Ljubljana, Slovenia 3Institute of Physical Biology, 1000 Ljubljana, Slovenia Received 09 November 2011; Accepted 13 March 2012 Abstract: Early chemical-induced stress in Solanum tuberosum leaves was visualized using delayed fluorescence (DF) imaging. The ability to detect spatially heterogeneous responses of plant leaves exposed to several toxicants using delayed fluorescence was compared to prompt fluorescence (PF) imaging and the standard maximum fluorescence yield of PSII measurements (Fv/Fm). The toxicants used in the study were two photosynthesis inhibitors (herbicides), 100 μM methyl viologen (MV) and 140 μM diuron (DCMU), and two heavy metals, 100 μM cadmium and 100 μM copper. The exposure times were 5 and 72 h. Significant photosynthesis-inhibitor effects were already visualized after 5 h. In addition, a significant reduction in the DF/PF index was measured in DCMU- and MV-treated leaves after 5 h. In contrast, only DCMU-treated leaves exhibited a significant decrease in Fv/Fm after 5 h. All treatments resulted in a significant decrease in the DF/PF parameter after 72 h of exposure, when only MV and Cd treatment resulted in visible symptoms. Our study highlights the power of delayed fluorescence imaging. Abundant quantifiable spatial information was obtained with the instrumental setup. Delayed fluorescence imaging has been confirmed as a very responsive and useful technique for detecting stress induced by photosynthesis inhibitors or heavy metals. -
Derivation of Proposed 2007 Draft Matrix Soil Standards for Barium
Derivation of Proposed 2007 Draft Matrix Soil Standards for Barium Glyn R. Fox Environmental Management Branch Environmental Protection Division September 24, 2007 Victoria, British Columbia Table of Contents Page 1. Introduction ……………………………………………………………………… 4 2. Details Related to Derivation of Proposed 2007 Draft Matrix Soil Standards 2.1 Derivation of Human Health Protection Standards – Intake of contaminated soil ………………………………………………………….. 7 2.2 Derivation of Human health Protection Standards – Groundwater used for drinking water ……………………………….…………….......... 7 2.3 Derivation of Environmental Protection Standards – Toxicity to soil invertebrates and plants ……………………………………….......... 9 2.4 Derivation of Environmental Protection Standards – Livestock ingesting soil and fodder ………………………………………………… 9 2.5 Derivation of Environmental Protection Standards – Major microbial function impairment ………………………………….……… 10 2.6 Derivation of Environmental Protection Standards – Groundwater flow to surface water used by aquatic life ..…………………………… 10 2.7 Derivation of Environmental Protection Standards – Groundwater used for livestock watering ……………………………………………… 11 2.8 Derivation of Environmental Protection Standards – Groundwater used for irrigation ………………………………………………………… 12 2.9 CSST “Background” Adjustment ……………………..……………… 12 2.10 Application of CSST Rounding-off Rule ……………………………… 12 3. References …….…………………………………………………………………… 13 2 Table of Contents (continued) Page 4. Exhibits Exhibit 1. Proposed 2007 Draft Matrix Soil Standards for Barium ……..… 19 5. Tables -
Use of Chlorofluorocarbons in Hydrology : a Guidebook
USE OF CHLOROFLUOROCARBONS IN HYDROLOGY A Guidebook USE OF CHLOROFLUOROCARBONS IN HYDROLOGY A GUIDEBOOK 2005 Edition The following States are Members of the International Atomic Energy Agency: AFGHANISTAN GREECE PANAMA ALBANIA GUATEMALA PARAGUAY ALGERIA HAITI PERU ANGOLA HOLY SEE PHILIPPINES ARGENTINA HONDURAS POLAND ARMENIA HUNGARY PORTUGAL AUSTRALIA ICELAND QATAR AUSTRIA INDIA REPUBLIC OF MOLDOVA AZERBAIJAN INDONESIA ROMANIA BANGLADESH IRAN, ISLAMIC REPUBLIC OF RUSSIAN FEDERATION BELARUS IRAQ SAUDI ARABIA BELGIUM IRELAND SENEGAL BENIN ISRAEL SERBIA AND MONTENEGRO BOLIVIA ITALY SEYCHELLES BOSNIA AND HERZEGOVINA JAMAICA SIERRA LEONE BOTSWANA JAPAN BRAZIL JORDAN SINGAPORE BULGARIA KAZAKHSTAN SLOVAKIA BURKINA FASO KENYA SLOVENIA CAMEROON KOREA, REPUBLIC OF SOUTH AFRICA CANADA KUWAIT SPAIN CENTRAL AFRICAN KYRGYZSTAN SRI LANKA REPUBLIC LATVIA SUDAN CHAD LEBANON SWEDEN CHILE LIBERIA SWITZERLAND CHINA LIBYAN ARAB JAMAHIRIYA SYRIAN ARAB REPUBLIC COLOMBIA LIECHTENSTEIN TAJIKISTAN COSTA RICA LITHUANIA THAILAND CÔTE D’IVOIRE LUXEMBOURG THE FORMER YUGOSLAV CROATIA MADAGASCAR REPUBLIC OF MACEDONIA CUBA MALAYSIA TUNISIA CYPRUS MALI TURKEY CZECH REPUBLIC MALTA UGANDA DEMOCRATIC REPUBLIC MARSHALL ISLANDS UKRAINE OF THE CONGO MAURITANIA UNITED ARAB EMIRATES DENMARK MAURITIUS UNITED KINGDOM OF DOMINICAN REPUBLIC MEXICO GREAT BRITAIN AND ECUADOR MONACO NORTHERN IRELAND EGYPT MONGOLIA UNITED REPUBLIC EL SALVADOR MOROCCO ERITREA MYANMAR OF TANZANIA ESTONIA NAMIBIA UNITED STATES OF AMERICA ETHIOPIA NETHERLANDS URUGUAY FINLAND NEW ZEALAND UZBEKISTAN FRANCE NICARAGUA VENEZUELA GABON NIGER VIETNAM GEORGIA NIGERIA YEMEN GERMANY NORWAY ZAMBIA GHANA PAKISTAN ZIMBABWE The Agency’s Statute was approved on 23 October 1956 by the Conference on the Statute of the IAEA held at United Nations Headquarters, New York; it entered into force on 29 July 1957. The Headquarters of the Agency are situated in Vienna. -
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Journal of Materials Chemistry A Accepted Manuscript This is an Accepted Manuscript, which has been through the Royal Society of Chemistry peer review process and has been accepted for publication. Accepted Manuscripts are published online shortly after acceptance, before technical editing, formatting and proof reading. Using this free service, authors can make their results available to the community, in citable form, before we publish the edited article. We will replace this Accepted Manuscript with the edited and formatted Advance Article as soon as it is available. You can find more information about Accepted Manuscripts in the Information for Authors. Please note that technical editing may introduce minor changes to the text and/or graphics, which may alter content. The journal’s standard Terms & Conditions and the Ethical guidelines still apply. In no event shall the Royal Society of Chemistry be held responsible for any errors or omissions in this Accepted Manuscript or any consequences arising from the use of any information it contains. www.rsc.org/materialsA Page 1 of 9 Journal of Materials Chemistry A ARTICLE JMCA Safer Salts for CdTe Nanocrystal Solution Processed Solar Cells: The Dual Roles of Ligand Exchange and Grain Growth Received 00th January 20xx, a b c d e Accepted 00th January 20xx Troy K. Townsend, † William B. Heuer, Edward E. Foos, Eric Kowalski, Woojun Yoon and Joseph G. Tischler e DOI: 10.1039/x0xx00000x Inorganic CdSe/CdTe nanocrystals for solid-state photovoltaic devices are typically sintered into a bulk-like material after www.rsc.org/ annealing in the presence of solid cadmium chloride. -
Chemical Name Federal P Code CAS Registry Number Acutely
Acutely / Extremely Hazardous Waste List Federal P CAS Registry Acutely / Extremely Chemical Name Code Number Hazardous 4,7-Methano-1H-indene, 1,4,5,6,7,8,8-heptachloro-3a,4,7,7a-tetrahydro- P059 76-44-8 Acutely Hazardous 6,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10- hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide P050 115-29-7 Acutely Hazardous Methanimidamide, N,N-dimethyl-N'-[2-methyl-4-[[(methylamino)carbonyl]oxy]phenyl]- P197 17702-57-7 Acutely Hazardous 1-(o-Chlorophenyl)thiourea P026 5344-82-1 Acutely Hazardous 1-(o-Chlorophenyl)thiourea 5344-82-1 Extremely Hazardous 1,1,1-Trichloro-2, -bis(p-methoxyphenyl)ethane Extremely Hazardous 1,1a,2,2,3,3a,4,5,5,5a,5b,6-Dodecachlorooctahydro-1,3,4-metheno-1H-cyclobuta (cd) pentalene, Dechlorane Extremely Hazardous 1,1a,3,3a,4,5,5,5a,5b,6-Decachloro--octahydro-1,2,4-metheno-2H-cyclobuta (cd) pentalen-2- one, chlorecone Extremely Hazardous 1,1-Dimethylhydrazine 57-14-7 Extremely Hazardous 1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4,4a,5,6,7,8,8a-octahydro-1,4-endo-endo-5,8- dimethanonaph-thalene Extremely Hazardous 1,2,3-Propanetriol, trinitrate P081 55-63-0 Acutely Hazardous 1,2,3-Propanetriol, trinitrate 55-63-0 Extremely Hazardous 1,2,4,5,6,7,8,8-Octachloro-4,7-methano-3a,4,7,7a-tetra- hydro- indane Extremely Hazardous 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]- 51-43-4 Extremely Hazardous 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]-, P042 51-43-4 Acutely Hazardous 1,2-Dibromo-3-chloropropane 96-12-8 Extremely Hazardous 1,2-Propylenimine P067 75-55-8 Acutely Hazardous 1,2-Propylenimine 75-55-8 Extremely Hazardous 1,3,4,5,6,7,8,8-Octachloro-1,3,3a,4,7,7a-hexahydro-4,7-methanoisobenzofuran Extremely Hazardous 1,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O- [(methylamino)-carbonyl]oxime 26419-73-8 Extremely Hazardous 1,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O- [(methylamino)-carbonyl]oxime. -
"Fluorine Compounds, Organic," In: Ullmann's Encyclopedia Of
Article No : a11_349 Fluorine Compounds, Organic GU¨ NTER SIEGEMUND, Hoechst Aktiengesellschaft, Frankfurt, Federal Republic of Germany WERNER SCHWERTFEGER, Hoechst Aktiengesellschaft, Frankfurt, Federal Republic of Germany ANDREW FEIRING, E. I. DuPont de Nemours & Co., Wilmington, Delaware, United States BRUCE SMART, E. I. DuPont de Nemours & Co., Wilmington, Delaware, United States FRED BEHR, Minnesota Mining and Manufacturing Company, St. Paul, Minnesota, United States HERWARD VOGEL, Minnesota Mining and Manufacturing Company, St. Paul, Minnesota, United States BLAINE MCKUSICK, E. I. DuPont de Nemours & Co., Wilmington, Delaware, United States 1. Introduction....................... 444 8. Fluorinated Carboxylic Acids and 2. Production Processes ................ 445 Fluorinated Alkanesulfonic Acids ...... 470 2.1. Substitution of Hydrogen............. 445 8.1. Fluorinated Carboxylic Acids ......... 470 2.2. Halogen – Fluorine Exchange ......... 446 8.1.1. Fluorinated Acetic Acids .............. 470 2.3. Synthesis from Fluorinated Synthons ... 447 8.1.2. Long-Chain Perfluorocarboxylic Acids .... 470 2.4. Addition of Hydrogen Fluoride to 8.1.3. Fluorinated Dicarboxylic Acids ......... 472 Unsaturated Bonds ................. 447 8.1.4. Tetrafluoroethylene – Perfluorovinyl Ether 2.5. Miscellaneous Methods .............. 447 Copolymers with Carboxylic Acid Groups . 472 2.6. Purification and Analysis ............. 447 8.2. Fluorinated Alkanesulfonic Acids ...... 472 3. Fluorinated Alkanes................. 448 8.2.1. Perfluoroalkanesulfonic Acids