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Neuroactive Insecticides: Targets, Selectivity, Resistance, and Secondary Effects
EN58CH06-Casida ARI 5 December 2012 8:11 Neuroactive Insecticides: Targets, Selectivity, Resistance, and Secondary Effects John E. Casida1,∗ and Kathleen A. Durkin2 1Environmental Chemistry and Toxicology Laboratory, Department of Environmental Science, Policy, and Management, 2Molecular Graphics and Computational Facility, College of Chemistry, University of California, Berkeley, California 94720; email: [email protected], [email protected] Annu. Rev. Entomol. 2013. 58:99–117 Keywords The Annual Review of Entomology is online at acetylcholinesterase, calcium channels, GABAA receptor, nicotinic ento.annualreviews.org receptor, secondary targets, sodium channel This article’s doi: 10.1146/annurev-ento-120811-153645 Abstract Copyright c 2013 by Annual Reviews. Neuroactive insecticides are the principal means of protecting crops, people, All rights reserved livestock, and pets from pest insect attack and disease transmission. Cur- ∗ Corresponding author rently, the four major nerve targets are acetylcholinesterase for organophos- phates and methylcarbamates, the nicotinic acetylcholine receptor for neonicotinoids, the γ-aminobutyric acid receptor/chloride channel for by Public Health Information Access Project on 04/29/14. For personal use only. Annu. Rev. Entomol. 2013.58:99-117. Downloaded from www.annualreviews.org polychlorocyclohexanes and fiproles, and the voltage-gated sodium channel for pyrethroids and dichlorodiphenyltrichloroethane. Species selectivity and acquired resistance are attributable in part to structural differences in binding subsites, receptor subunit interfaces, or transmembrane regions. Additional targets are sites in the sodium channel (indoxacarb and metaflumizone), the glutamate-gated chloride channel (avermectins), the octopamine receptor (amitraz metabolite), and the calcium-activated calcium channel (diamides). Secondary toxic effects in mammals from off-target serine hydrolase inhibi- tion include organophosphate-induced delayed neuropathy and disruption of the cannabinoid system. -
Mass Spectrometer Business Presentation Materials
Mass Spectrometer Business Presentation Materials Hiroto Itoi, Corporate Officer Deputy General Manager of the Analytical & Measuring Instruments Division Shimadzu Corporation Jul. 3, 2018 Contents I. Introduction • Expansion of Mass Spectrometry ………………………………………………………………… p.3 • History of Shimadzu's Growth in Mass Spectrometry …………………………………………… p.5 II. Overview of Mass Spectrometers • Operating Principle, Demand Trends, and Vendors ……………………………………………… p.9 • Mass Spectra ………………………………………………………………………………………… p.10 • Configuration of Mass Spectrometers …………………………………………………………… p.11 • Ionization …………………………………………………………………………………………… p.12 • Mass Separation …………………………………………………………………………………… p.14 III. Shimadzu's Mass Spectrometer Business • Product Type ………………………………………………………………………………………… p.17 • Application Software ………………………………………………………………………………… p.18 • Growth Strategy for Mass Spectrometer Business ……………………………………………… p.19 • Expand/Improve Product Lines …………………………………………………………………… p.20 • Measures to Expand Application Fields …………………………………………………………… p.24 • Measures to Automate Data Processing Using AI ……………………………………………… p.25 IV. Summary • Future Direction ……………………………………………………………………………………… p.26 July 2018 Mass Spectrometer Business Presentation Materials 2 I. Introduction Expansion of Mass Spectrometry (1) Why Mass Spectrometry? Mass spectrometry is able to analyze a wide variety of compounds with high accuracy and high efficiency (simultaneous multicomponent analysis). It offers superior characteristics that are especially beneficial in the following fields, -
Acute Exposure to a Sublethal Dose of Imidacloprid and Coumaphos Enhances Olfactory Learning and Memory in the Honeybee Apis Mellifera
Invert Neurosci DOI 10.1007/s10158-012-0144-7 ORIGINAL PAPER Acute exposure to a sublethal dose of imidacloprid and coumaphos enhances olfactory learning and memory in the honeybee Apis mellifera Sally M. Williamson • Daniel D. Baker • Geraldine A. Wright Received: 8 October 2012 / Accepted: 5 November 2012 Ó The Author(s) 2012. This article is published with open access at Springerlink.com Abstract The decline of honeybees and other pollinating agricultural chemicals used to combat pests and fungi that insects is a current cause for concern. A major factor bees experience when they pollinate flowering crops or implicated in their decline is exposure to agricultural plants near agricultural land (Dainat et al. 2011; Neumann chemicals, in particular the neonicotinoid insecticides such and Carreck 2010; vanEngelsdorp et al. 2009). Systemic as imidacloprid. Honeybees are also subjected to additional insecticides, such as the neonicotinoids, are of particular chemical exposure when beekeepers treat hives with aca- concern as they persist in pollen and nectar long after ricides to combat the mite Varroa destructor. Here, we application (Rortais et al. 2005). Domesticated honeybees assess the effects of acute sublethal doses of the neoni- are also exposed to chemical acaricides administered by cotinoid imidacloprid, and the organophosphate acaricide beekeepers within the colony to control infestations of the coumaphos, on honey bee learning and memory. Imida- parasitic mite Varroa destructor (Rosenkranz et al. 2010). cloprid had little effect on performance in a six-trial It has been suggested that combined exposure to both olfactory conditioning assay, while coumaphos caused a pesticides and acaricides may be more toxic to bees than modest impairment. -
Contents • Introduction to Proteomics and Mass Spectrometry
Contents • Introduction to Proteomics and Mass spectrometry - What we need to know in our quest to explain life - Fundamental things you need to know about mass spectrometry • Interfaces and ion sources - Electrospray ionization (ESI) - conventional and nanospray - Heated nebulizer atmospheric pressure chemical ionization - Matrix assisted laser desorption • Types of MS analyzers - Magnetic sector - Quadrupole - Time-of-flight - Hybrid - Ion trap In the next step in our quest to explain what is life The human genome project has largely been completed and many other genomes are surrendering to the gene sequencers. However, all this knowledge does not give us the information that is needed to explain how living cells work. To do that, we need to study proteins. In 2002, mass spectrometry has developed to the point where it has the capacity to obtain the "exact" molecular weight of many macromolecules. At the present time, this includes proteins up to 150,000 Da. Proteins of higher molecular weights (up to 500,000 Da) can also be studied by mass spectrometry, but with less accuracy. The paradigm for sequencing of peptides and identification of proteins has changed – because of the availability of the human genome database, peptides can be identified merely by their masses or by partial sequence information, often in minutes, not hours. This new capacity is shifting the emphasis of biomedical research back to the functional aspects of cell biochemistry, the expression of particular sets of genes and their gene products, the proteins of the cell. These are the new goals of the biological scientist: o to know which proteins are expressed in each cell, preferably one cell at a time o to know how these proteins are modified, information that cannot necessarily be deduced from the nucleotide sequence of individual genes. -
Redalyc.NEUROTOXIC POTENTIAL of TRICHLORFON to MULTIPLE
Acta Biológica Colombiana ISSN: 0120-548X [email protected] Universidad Nacional de Colombia Sede Bogotá Colombia TAPIERO HERNÁNDEZ, YACSON; RONDÓN BARRAGÁN, IANG; CÉSPEDES RUBIO, ANGEL NEUROTOXIC POTENTIAL OF TRICHLORFON TO MULTIPLE SUBLETHAL DOSES IN WISTAR RATS Acta Biológica Colombiana, vol. 18, núm. 3, septiembre-diciembre, 2013, pp. 479-487 Universidad Nacional de Colombia Sede Bogotá Bogotá, Colombia Available in: http://www.redalyc.org/articulo.oa?id=319029232007 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative . UNIVE RSIDAD ~ • NACIONAL .; DECOLOMBIA , SE DE 1I 0 G O T Á ACTA BIOLÓGICA COLOMBIANA f ACUlT AD DE CIENCIAS DEPAAT.uolEI'(f() DE8101.OOiA. Artículo de investigación NEUROTOXIC POTENTIAL OF TRICHLORFON TO MULTIPLE SUBLETHAL DOSES IN WISTAR RATS Potencial neurotóxico del Triclorfón a dosis múltiples subletales en ratas wistar YACSON TAPI ERO HERNÁNDEZ1, Est. MVZ; IANG RONDÓN BARRAGÁN1, M.5c.; ANGEL CÉSPEDES RUBIO', Ph. D. 1 Grou p for Research in Ne urodege nera tive o isease.Toxico logy Laboratory (33 L-1 01 ), De pa rt ment ofAn imal Health, Fac uIty ofVeteri nary Medicine and Zootecnia,Universidad del Tolima. A.A. 546 lbagué, Colombia. isro ndon S'u t.edu.co, yacsontapiero@hotmail,com, b iorned icineresearch<&yahoo.es Corresponding author: Angel Céspedes, bio med icineresearch@ya hoo ,es, aecesp ed @ut ,ed u ca Presentado el30 de abril de 2013, aceptado el30 de mayo de 2013, fecha de reenvfo el14 de septiembre de 2013. -
Modern Mass Spectrometry
Modern Mass Spectrometry MacMillan Group Meeting 2005 Sandra Lee Key References: E. Uggerud, S. Petrie, D. K. Bohme, F. Turecek, D. Schröder, H. Schwarz, D. Plattner, T. Wyttenbach, M. T. Bowers, P. B. Armentrout, S. A. Truger, T. Junker, G. Suizdak, Mark Brönstrup. Topics in Current Chemistry: Modern Mass Spectroscopy, pp. 1-302, 225. Springer-Verlag, Berlin, 2003. Current Topics in Organic Chemistry 2003, 15, 1503-1624 1 The Basics of Mass Spectroscopy ! Purpose Mass spectrometers use the difference in mass-to-charge ratio (m/z) of ionized atoms or molecules to separate them. Therefore, mass spectroscopy allows quantitation of atoms or molecules and provides structural information by the identification of distinctive fragmentation patterns. The general operation of a mass spectrometer is: "1. " create gas-phase ions "2. " separate the ions in space or time based on their mass-to-charge ratio "3. " measure the quantity of ions of each mass-to-charge ratio Ionization sources ! Instrumentation Chemical Ionisation (CI) Atmospheric Pressure CI!(APCI) Electron Impact!(EI) Electrospray Ionization!(ESI) SORTING DETECTION IONIZATION OF IONS OF IONS Fast Atom Bombardment (FAB) Field Desorption/Field Ionisation (FD/FI) Matrix Assisted Laser Desorption gaseous mass ion Ionisation!(MALDI) ion source analyzer transducer Thermospray Ionisation (TI) Analyzers quadrupoles vacuum signal Time-of-Flight (TOF) pump processor magnetic sectors 10-5– 10-8 torr Fourier transform and quadrupole ion traps inlet Detectors mass electron multiplier spectrum Faraday cup Ionization Sources: Classical Methods ! Electron Impact Ionization A beam of electrons passes through a gas-phase sample and collides with neutral analyte molcules (M) to produce a positively charged ion or a fragment ion. -
Quantum Chemical Study of the Thermochemical Properties of Organophosphorous Compounds A
QUANTUM CHEMICAL STUDY OF THE THERMOCHEMICAL PROPERTIES OF ORGANOPHOSPHOROUS COMPOUNDS A. Khalfa, M. Ferrari, R. Fournet, B. Sirjean, L. Verdier, Pierre-Alexandre Glaude To cite this version: A. Khalfa, M. Ferrari, R. Fournet, B. Sirjean, L. Verdier, et al.. QUANTUM CHEMICAL STUDY OF THE THERMOCHEMICAL PROPERTIES OF ORGANOPHOSPHOROUS COMPOUNDS. Journal of Physical Chemistry A, American Chemical Society, 2015, 119 (42), pp.10527-10539. 10.1021/acs.jpca.5b07071. hal-01241498 HAL Id: hal-01241498 https://hal.archives-ouvertes.fr/hal-01241498 Submitted on 10 Dec 2015 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. QUANTUM CHEMICAL STUDY OF THE THERMOCHEMICAL PROPERTIES OF ORGANOPHOSPHOROUS COMPOUNDS A. Khalfa, M. Ferrari1, R. Fournet1, B. Sirjean1, L. Verdier2, P.A. Glaude1 1Laboratoire Réactions et Génie des Procédés, Université de Lorraine, CNRS, 1 rue Grandville, BP 20451, 54001 NANCY Cedex, France, 2DGA Maîtrise NRBC, Site du Bouchet, 5 rue Lavoisier, BP n°3, 91710 Vert le Petit, France Abstract Organophosphorous compounds are involved in many toxic compounds such as fungicides, pesticides, or chemical warfare nerve agents. The understanding of the decomposition chemistry of these compounds in the environment is largely limited by the scarcity of thermochemical data. -
Methods of Ion Generation
Chem. Rev. 2001, 101, 361−375 361 Methods of Ion Generation Marvin L. Vestal PE Biosystems, Framingham, Massachusetts 01701 Received May 24, 2000 Contents I. Introduction 361 II. Atomic Ions 362 A. Thermal Ionization 362 B. Spark Source 362 C. Plasma Sources 362 D. Glow Discharge 362 E. Inductively Coupled Plasma (ICP) 363 III. Molecular Ions from Volatile Samples. 364 A. Electron Ionization (EI) 364 B. Chemical Ionization (CI) 365 C. Photoionization (PI) 367 D. Field Ionization (FI) 367 IV. Molecular Ions from Nonvolatile Samples 367 Marvin L. Vestal received his B.S. and M.S. degrees, 1958 and 1960, A. Spray Techniques 367 respectively, in Engineering Sciences from Purdue Univesity, Layfayette, IN. In 1975 he received his Ph.D. degree in Chemical Physics from the B. Electrospray 367 University of Utah, Salt Lake City. From 1958 to 1960 he was a Scientist C. Desorption from Surfaces 369 at Johnston Laboratories, Inc., in Layfayette, IN. From 1960 to 1967 he D. High-Energy Particle Impact 369 became Senior Scientist at Johnston Laboratories, Inc., in Baltimore, MD. E. Low-Energy Particle Impact 370 From 1960 to 1962 he was a Graduate Student in the Department of Physics at John Hopkins University. From 1967 to 1970 he was Vice F. Low-Energy Impact with Liquid Surfaces 371 President at Scientific Research Instruments, Corp. in Baltimore, MD. From G. Flow FAB 371 1970 to 1975 he was a Graduate Student and Research Instructor at the H. Laser Ionization−MALDI 371 University of Utah, Salt Lake City. From 1976 to 1981 he became I. -
A Novel High Resolution Accurate Mass Orbitrap-Based GC-MS
ROUTINE OR RESEARCH GC-Orbitrap for Environmental Analysis a collaboration between ROUTINE OR RESEARCH GC-Orbitrap for Environmental Analysis Foreword A Novel High Resolution Accurate Mass Orbitrap-based GC-MS Platform for Routine Analysis of Short Chained Chlorinated Paraffins In this study, the performance of a novel bench top, high resolution accurate mass Orbitrap™-based GC-MS was tested for the analysis of SCCPs. System performance was tested using full-scan acquisition and simple instrumental setup. Pyrolysis-GC-Orbitrap MS - A Powerful Analytical Tool for Identification and Quantification of Microplastics in a Biological Matrix The purpose of the experiments described in this work was to assess the applicability of pyrolysis-gas chromatography-Orbitrap™ mass spectrometry for the qualitative and quantitative analysis of plastic polymers in complex biological matrices. Low Level Quantification of NDMA and Non-targeted Contaminants Screening in Drinking Water using GC Orbitrap Mass Spectrometry In this work, a sensitive and selective method for NDMA detection and quantification using high resolution accurate mass GC Orbitrap™ technology is described. Overcoming Analytical Challenges for Polybrominated Diphenyl Ethers (PBDEs) Analysis in Environmental Samples using Gas Chromatography – Orbitrap Mass Spectrometry The note demonstrates the quantitative performance of the Thermo Scientific™ Exactive™ GC Orbitrap™ GC-MS mass spectrometer for the analysis of polybrominated diphenyl ethers (PBDEs) in environmental samples. Versatility of GC-Orbitrap Mass Spectrometry for the Ultra-trace Detection of Persistent Organic Pollutants in Penguin Blood from Antarctica In this study, the performance of the Thermo Scientific™ Q Exactive™ GC Orbitrap™ mass spectrometer was evaluated for routine analysis of POPs within King penguin blood from Antarctica. -
Thermospray Mass Spectrometry , a New Technique for Studying The
430 Notizen Thermospray Mass Spectrometry , a New charged droplets. These droplets decompose in a Technique for Studying the Relative Stability heated jet chamber in which a pressure of several of Cluster Ions of Salts mbar is maintained, and desolvated ions enter the mass analyser via a small orifice. Typically quadru- G. Schmelzeisen-Redeker, S. S. Wong, pole mass filters are employed. For the production U. Giessmann, and F. W. Röllgen of salt cluster ions the temperatures of the jet and in Institut für Physikalische Chemie der Universität Bonn the jet chamber must be high enough to allow the Z. Naturforsch. 40a,430-431 (1985); decomposition of charged small solid particles. For received February 23. 1985 the ammonium halide this condition is easily achieved. Thermospray (TSP) mass spectrometry provides a means of studying stability effects in the frequency distribution of The ammonium chloride cluster ion distribution cluster ions of salts under conditions of heat transfer to the as obtained by the new TSP technique is shown in cluster ions via thermal collisions in a gas. This is demon- strated for the cluster ions of ammonium chloride. The Figure 2. The TSP mass spectrum was obtained TSP mass spectrum is compared with that obtained by with the experimental arrangement described in sputtering of the salt in secondary ion mass spectrometry. [16], A quadrupole mass filter with a mass range 1-420 was utilized. A 0.1 molar aqueous solution of NH C1 was applied. The temperature at the end Cluster ions of salts are easily generated by 4 of the capillary was 250 °C and the temperature of particle impact in secondary ion mass spectrometry the jet chamber was 180 °C. -
Environmental Health Criteria 63 ORGANOPHOSPHORUS
Environmental Health Criteria 63 ORGANOPHOSPHORUS INSECTICIDES: A GENERAL INTRODUCTION Please note that the layout and pagination of this web version are not identical with the printed version. Organophophorus insecticides: a general introduction (EHC 63, 1986) INTERNATIONAL PROGRAMME ON CHEMICAL SAFETY ENVIRONMENTAL HEALTH CRITERIA 63 ORGANOPHOSPHORUS INSECTICIDES: A GENERAL INTRODUCTION This report contains the collective views of an international group of experts and does not necessarily represent the decisions or the stated policy of the United Nations Environment Programme, the International Labour Organisation, or the World Health Organization. Published under the joint sponsorship of the United Nations Environment Programme, the International Labour Organisation, and the World Health Organization World Health Orgnization Geneva, 1986 The International Programme on Chemical Safety (IPCS) is a joint venture of the United Nations Environment Programme, the International Labour Organisation, and the World Health Organization. The main objective of the IPCS is to carry out and disseminate evaluations of the effects of chemicals on human health and the quality of the environment. Supporting activities include the development of epidemiological, experimental laboratory, and risk-assessment methods that could produce internationally comparable results, and the development of manpower in the field of toxicology. Other activities carried out by the IPCS include the development of know-how for coping with chemical accidents, coordination -
Federal Register/Vol. 69, No. 188/Wednesday, September 29
Federal Register / Vol. 69, No. 188 / Wednesday, September 29, 2004 / Notices 58125 collected by CSREES contains sensitive on Tuesday, September 28, 2004, to organization facilitating fair information of an individual nature. provide information and receive public international trade in food and Estimate of Burden: Each year, the comments on agenda items that will be protecting the health and economic State 4–H office aggregates all electronic discussed at the Fifteenth Session of the interests of consumers. Through County 4–H enrollment reports into the Codex Committee on Residues in adoption of food standards, codes of State 4–H enrollment report, and Veterinary Drugs in Foods, which will practice, and other guidelines transmits it electronically to CSREES. be held in Alexandria, VA, October 26– developed by its committees, and by The applicable Territories similarly 29, 2004. The Under Secretary and CVM promoting their adoption and transmit aggregated information. This recognize the importance of providing implementation by governments, Codex requirement constitutes the Federal interested parties with information seeks to ensure that the world’s food burden CSREES imposes on the States about the Codex Committee on Residues supply is sound, wholesome, free from and Territories and is the only burden of Veterinary Drugs in Foods of the adulteration, and correctly labeled. In measured and accounted for in this Codex Alimentarius Commission and to the United States, USDA, FDA, and the estimate. CSREES estimates that it takes address items on the Agenda for the Environmental Protection Agency one State or Territory 31 hours to 15th Session of the Committee. manage and carry out U.S.