Download or read book Laboratory Spectra of Polycyclic Aromatic Hydrocarbon Cations in the Vacuum Ultraviolet written by Michael S. Robinson and published by . This book was released on 1996 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polycyclic Aromatic Hydrocarbons and Astrophysics written by A. Léger and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: The near Infra-Red emission of the Interstellar Medium is a very puzzling subject. In the brightest regions, where spectroscopic observa tions are possible from the ground, several bands (3.3 - 3.4 - 6.2 - 7.7 - 8.6 - 11.3 ~m) have been observed since 1973. The absence of satisfying explanation was so obvious that they were called "Unidenti fied IR Emission Bands". The puzzle still increased when were known the first results of the general IR sky survey made by the satellite IRAS. On a large scale, the near IR emission of the Interstellar medium was expected to be very small but it was observed to be about one third of the total IR emission for our own galaxy ..• The situation has moved in 1984 when it was suggested that a class of stable organic molecules, the Polycyclic Aromatic Hydrocarbons (PAH's) could be at the origin of this near IR emission. Initially based on the required refractory character of particules that should be heated to high temperature without subliming, this hypothesis leads to a sugges tive spectroscopic similarity with the observed astronomical bands. This hypothesis is attractive and it has many implications, for ins tance, the PAHs would be the most abundant organic molecules in the universe. However, many points have to be clarified and the different consequences of this suggestion should be explored.
Download or read book Formation and Evolution of Solids in Space written by J. Mayo Greenberg and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interstellar dust, meteorites, interplanetary dust particles (IDP's), the zodiacal light, comets, comet dust. Where do they come from, what are they made of, how do they evolve, and finally, are there connections between them? These are the questions discussed in this volume by some of the world's outstanding experts in their respective fields. The techniques used for studying the `small' solid objects of space are thoroughly discussed. Some of the methods involve a synthetic approach using the laboratory to create analog environments and materials which are believed to resemble those in space. Others use direct laboratory methods with state-of-the-art analytical tools to study the material of the objects themselves - meteorites, IDP'S. And others apply the latest in astronomical facilities to provide quantitative data on the material properties of the solids which can only be deduced from remote observations, These are compared with the laboratory results. In one instance there was a possibility to study a solar system body in situ and that was the case of comet Halley and some of the results of these studies obtained from space `laboratories' launched to meet it are discussed here. Finally, there are theoretical papers which are aimed at bridging the results of observational and laboratory methods. This book is recommended to senior scientists as well as graduate students who wish to pursue research in interstellar and solar system astronomy and their connections.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2000 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Literature 1997 Part 1 written by Astronomisches Rechen-InstitutARI and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 1746 pages. Available in PDF, EPUB and Kindle. Book excerpt: Astronomy and Astrophysics Abstracts is devoted to the recording, summarizing and indexing of astronomical publications throughout the world. Two volumes are scheduled to appear per year. Volume 67 records 10,903 papers covering besides the classical fields of astronomy and astrophysics such matters as space flights related to astronomy, lunar and planetary probes and satellites, meteorites and interplanetary matter, X rays and cosmic rays, quasars and pulsars. The abstracts are classified under more than one hundred subject categories thus permitting quick surveying of the bulk of material published on the same topic within six months. For instance, this volume records 119 papers on minor planets, 155 papers on supernovae, and 554 papers on cosmology.
Download or read book Ultraviolet Spectra of Aromatic Compounds written by Robert A. Friedel and published by . This book was released on 1951 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spectrometric nomenclature and the absorption law for solutions. Instruments and experimental procedure. Theoretical aspects of ultraviolet absorptions spectra. The use of ultraviolet spectra in qualitative analysis. Quantitative analysis.
Download or read book Aromatic Polycyclic Hydrocarbons Advances in Research and Application 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aromatic Polycyclic Hydrocarbons: Advances in Research and Application: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Aromatic Polycyclic Hydrocarbons. The editors have built Aromatic Polycyclic Hydrocarbons: Advances in Research and Application: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Aromatic Polycyclic Hydrocarbons in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Aromatic Polycyclic Hydrocarbons: Advances in Research and Application: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Polynuclear Aromatic Hydrocarbons written by Marcus Cooke and published by . This book was released on 1982 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Analytical and Spectral Data for Polycyclic Aromatic Hydrocarbons Benzo a pyrene and its metabolites written by and published by . This book was released on 1993 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Analyses of Polycyclic Aromatic Hydrocarbons in Soils written by Frederick Mikio Kaisaki and published by . This book was released on 1981 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Atlas of Polycyclic Aromatic Compounds written by W. Karcher and published by Springer. This book was released on 2012-11-13 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is the 3rd in a series of comprehensive publications devoted to the molecular spectra and environmentally important properties of polycyclic aromatic compounds which constitute one of the most interesting classes of environmental carcinogens. Since the first identification of dibenz(a,h)anthracene and later benzo(a)pyrene as chemical carcinogens in the 1930's, the number of publications devoted to this ubiquitously occurring group of compounds has increased constantly. Therefore, this reference source for the spectral, physicochemical and en vironmentaJ properties of polycyclic aromatic compounds should be a welcome addition to the previous volumes for scientists engaged in the investigation, characterisation and control of this hazardous class of pollutants. As was the case with the preceding volume, this publication is the fruit of a close collaboration within the General Directorate for SCience, Research and Development of the Commission of the European Communities between the Environment Institute of the Joint Research Centre Ispra, the Community Bureau of Reference and expert laboratories in the member states. F. Geiss Director of the Environment Institute JRC Ispra 1. Introduction Polycyclic Aromatic Compounds (PAC) are an important class of carcinogenic environmental pollutants, which occur in air, water, soils, sediments, in food and in the work area. Because many hundreds of closely related isomers are being formed and released in the environment from combustion processes of fossil fuels and other organic materials, their environmental and health con trol presents a difficult task.
Download or read book Spectral Atlas of Polycyclic Aromatic Compounds written by W. Karcher and published by Springer. This book was released on 1988-11-30 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycyclic Aromatic Compounds (PAC) are a broad class of compounds whose wide distribution in the environment results from incomplete combustion processes of fossil fuels in power generator, industrial plant and domestic heating, from car exhaust gas and from tobacco smoke. Many PACs are biologically active and in particular many of the PACs with three or more fused rings are carcinogenic. Currently there is concern of the occurrence of these pollutants at ppb (ug.kg-1) le vel. However the predicted 2 to 3% annual increase in the rate of their release into 1 the environment could lead to ppm (ug.g-) levels in the next century. The move to wards stricter control of these pollutants brings with it the need for accurate monito ring of their environmental occurrence. Reliable identification and quantification of these compounds in complex environ mental samples depends greatly on the availability of reference values for their phy sicochemical and biochemical properties. This second volume results from a close collaboration within the General Directorate for Science, Research and Development of the Commission of the European Communities between the Joint Research Centre, Ispra Establishment, the Community Bureau of Reference and expert laboratories of the Member States.
Download or read book Polycyclic Aromatic Hydrocarbons in Water Sys written by David J. Futoma and published by Springer. This book was released on 1981-11-05 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Opisane so spektroskopske in kromatografske analize PAH v vodi, njihova topnost, vzorčevanje in predhodno koncentriranje.
Download or read book Ultraviolet Spectra of Aromatic Compounds written by R. A. Friedel and published by . This book was released on 1959 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Chemistry of Polycyclic Aromatic Compounds written by Milton Lee and published by Academic Press. This book was released on 1981-04-28 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical Chemistry of Polycyclic Aromatic Compounds focuses on the chemical and physical properties of the polycyclic aromatic compounds, critically evaluating various chromatographic and spectroscopic methods. This book discusses how gas chromatography and high-performance liquid chromatography can be both competitive and complementary analytical methods. Ancillary techniques of both are emphasized for the structural elucidation of individual polycyclic aromatic compounds in complex mixtures. The merits of spectroscopic methods in both structural work and quantitation are also described. This text likewise provides background information concerning the chemistry, occurrence, and toxicology of polycyclic aromatic compounds, including the isolation of polycyclic aromatic compounds from a wide variety of materials and matrices. This publication is recommended to scientists involved with the study of polycyclic aromatic compounds, analysts who need to acquire routine data, and individuals charged with formulating environmental policies and drafting regulations.
Download or read book Handbook of Polycyclic Aromatic Hydrocarbons written by Alf Bjørseth and published by . This book was released on 1983 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectral Atlas of Polycyclic Aromatic Compounds written by and published by Springer. This book was released on 1985-03-31 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
