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Author : Po-Fu Huang
Publisher :
ISBN 13 :
Total Pages : 482 pages
Book Rating : 4.:/5 (319 download)
Download or read book Electron Microscopy of Atmospheric Particles written by Po-Fu Huang and published by . This book was released on 1997 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William J. Franek
Publisher :
ISBN 13 :
Total Pages : 614 pages
Book Rating : 4.:/5 (266 download)
Download or read book Electron Microscopy and Elemental Analysis of Fractionated Atmospheric Particles for Source Identification written by William J. Franek and published by . This book was released on 1992 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Conny
Publisher :
ISBN 13 : 9781119554349
Total Pages : 350 pages
Book Rating : 4.5/5 (543 download)
Download or read book Microanalysis of Atmospheric Particles written by Conny and published by . This book was released on 2020-04 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John G. Dillard
Publisher :
ISBN 13 :
Total Pages : 90 pages
Book Rating : 4.F/5 ( download)
Download or read book Electron Spectroscopy for Chemical Analysis (ESCA) Study of Atmospheric Particles written by John G. Dillard and published by . This book was released on 1979 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : British Standards Institute Staff
Publisher :
ISBN 13 : 9780580409264
Total Pages : 52 pages
Book Rating : 4.4/5 (92 download)
Download or read book Ambient Air. Determination of Numerical Concentration of Inorganic Fibrous Particles. Scanning Electron Microscopy Method written by British Standards Institute Staff and published by . This book was released on 2002-12 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air, Quality, Air pollution, Mineral fibres, Fibres, Asbestos, Gypsum, Determination of content, Particulate air pollutants, Particle size distribution, Concentration (chemical), Electron microscopes, Microscopic analysis, X-ray analysis
Author : Steven B. Hayward
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (318 download)
Download or read book Particulate Matter Analysis by Electron Microscopy written by Steven B. Hayward and published by . This book was released on 1985 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : L Mick Brown
Publisher : World Scientific
ISBN 13 : 1783261005
Total Pages : 321 pages
Book Rating : 4.7/5 (832 download)
Download or read book Ultrafine Particles In The Atmosphere written by L Mick Brown and published by World Scientific. This book was released on 2003-07-30 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following the recognition that airborne particulate matter, even at quite modest concentrations, has an adverse effect on human health, there has been an intense research effort to understand the mechanisms and quantify the effects. One feature that has shone through is the important role of ultrafine particles as a contributor to the adverse effects of airborne particles. In this volume, many of the most distinguished researchers in the field provide a state-of-the-art overview of the scientific and medical research on ultrafine particles.
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (971 download)
Download or read book Sea Spray Aerosol Structure and Composition Using Cryogenic Transmission Electron Microscopy written by and published by . This book was released on 2016 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The surface properties of atmospheric aerosol particles largely control their impact on climate by affecting their ability to uptake water, react heterogeneously, and nucleate ice in clouds. However, in the vacuum of a conventional electron microscope, the native surface structure often undergoes chemical rearrangement resulting in surfaces that are quite different from their atmospheric configurations. Herein, we report the development of a cryo-TEM approach where sea spray aerosol particles are flash frozen in their native state and then probed by electron microscopy. This unique approach allows for the detection of not only mixed salts, but also soft materials including whole hydrated bacteria, diatoms, virus particles, marine vesicles, as well as gel networks within hydrated salt droplets. As a result, we anticipate this method will open up a new avenue of analysis for aerosol particles, not only for ocean-derived aerosols, but for those produced from other sources where there is interest in the transfer of organic or biological species from the biosphere to the atmosphere.
Author :
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (986 download)
Download or read book Measuring Mass-based Hygroscopicity of Atmospheric Particles Through in Situ Imaging written by and published by . This book was released on 2016 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantifying how atmospheric particles interact with water vapor is critical for understanding the effects of aerosols on climate. We present a novel method to measure the mass-based hygroscopicity of particles while characterizing their elemental and carbon functional group compositions. Since mass-based hygroscopicity is insensitive to particle geometry, it is advantageous for probing the hygroscopic behavior of atmospheric particles, which can have irregular morphologies. Combining scanning electron microscopy with energy dispersive X-ray analysis (SEM/EDX), scanning transmission X-ray microscopy (STXM) analysis, and in situ STXM humidification experiments, this method was validated using laboratory-generated, atmospherically relevant particles. Then, the hygroscopicity and elemental composition of 15 complex atmospheric particles were analyzed by leveraging quantification of C, N, and O from STXM, and complementary elemental quantification from SEM/EDX. We found three types of hygroscopic responses, and correlated high hygroscopicity with Na and Cl content. The mixing state of 158 other particles from the sample broadly agreed with those of the humidified particles, indicating the potential to infer atmospheric hygroscopic behavior from a selected subset of particles. As a result, these methods offer unique quantitative capabilities to characterize and correlate the hygroscopicity and chemistry of individual submicrometer atmospheric particles.
Author : Ruth Signorell
Publisher : CRC Press
ISBN 13 : 142008562X
Total Pages : 513 pages
Book Rating : 4.4/5 (2 download)
Download or read book Fundamentals and Applications in Aerosol Spectroscopy written by Ruth Signorell and published by CRC Press. This book was released on 2010-12-20 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helping you better understand the processes, instruments, and methods of aerosol spectroscopy, Fundamentals and Applications in Aerosol Spectroscopy provides an overview of the state of the art in this rapidly developing field. It covers fundamental aspects of aerosol spectroscopy, applications to atmospherically and astronomically relevant problem
Author : Advanced Metals Research Corporation
Publisher :
ISBN 13 :
Total Pages : 77 pages
Book Rating : 4.:/5 (19 download)
Download or read book Electron microprobe X-ray analysis of atmospheric aerosol particles written by Advanced Metals Research Corporation and published by . This book was released on 1969 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron microprobe analysis was applied to the chemical identification of the airborne particles characteristic of air pollution contaminants. A conventional AMR Electron Microprobe and a Philips EM200 Electron Microscope equipped with an AMR X-ray Spectrometer attachment were employed to investigate size-fractioned samples of laboratory generated aerosol particles of Na Cl and Zn (NH4)2 (SO4)2, as well as specific pollution sources, e.g. Los Angeles Smog and Auto Exhaust. The effect of instrument variables, including electron beam size, acceleration potential, and beam current was determined for particles ranging in size from 3mu to 0.5mu. X-ray Spectral Patterns obtained from Los Angeles Smog particles are presented and inherent limitations in the analytical technique are also discussed. Scanning Electron Microscopy was empoloyed as a supplement to conventional Electron Microscopy and was found to furnish valuable information on the nature of the particulates.
Author : Malissa Hanns
Publisher : CRC Press
ISBN 13 : 1351086545
Total Pages : 387 pages
Book Rating : 4.3/5 (51 download)
Download or read book Analysis of Airborne Particles by Physical Methods written by Malissa Hanns and published by CRC Press. This book was released on 2018-01-18 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 2018. Routledge is an imprint of Taylor & Francis, an Informa company.
Download or read book A Thermophoretic Precipitator for the Representative Collection of Atmospheric Ultrafine Particles for Microscopic Analysis written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this article, the potential of a thermophoretic sampling device to derive quantitative particle size distributions and number concentrations of aerosols based on microscopic single particle analysis is explored. For that purpose a plate-to-plate thermophoretic precipitator to collect ultrafine atmospheric particles for TEM (transmission electron microscopy) analysis has been calibrated and characterized. The representativeness of the samples has been verified in a series of experiments. Results show that, for particles with diameters of 15 nm to 300 nm, the precipitator's collection efficiency is independent of size, shape, and composition of the particles. Hence, its samples accurately represent the original aerosol. A numerical model of thermophoretic deposition within the device has been developed and tailored to the specifications of the precipitator. The model has been used to derive the particle number density and size distribution of several calibration aerosols using the TEM analysis of the samples taken with the thermophoretic precipitator as input parameters. The results agree very well with the on-line measurements of the calibration aerosols. This work demonstrates that our thermophoretic sampling device can be used to derive quantitative particle size distributions and number concentrations of ultrafine particles based on microscopic single particle analysis.
Download or read book Scanning Electron Microscope Analysis of Individual Particles in a Source-apportionment Study of Atmospheric Pollution in the Vaal Triangle written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Levels of air pollutants in the Vaal Triangle area have been a cause of public concern for a number of years. A pilot study was launched with the purpose of developing standard operating procedures for the sampling, bulk inorganic and organic chemical analysis, and single-particle analysis of airborne particulates from this region, as well as statistical data handling procedures. Guidelines set by the United States Environmental Protection Agency (EPA) for the Receptor Model as applied to the source apportionment of airborne particulates is adhered to in this instance. Samples of airborne particulate pollutants from four sites in the Vereeniging area were subjected to single-particle analysis by energy-dispersive X-ray-fluorescence analysis and image-analysis using a scanning electron microscope. Nineteen chemical and five physical parameters were measured. Two sub-sets of data were distinguished on the basis of particle size, and each was subjected to various cluster-analysis procedures. Seventeen chemical species were identified in each sub-set of data. These species were further subdivided on the morphological characteristics, and allocated to one or more source categories. It is anticipated that, as source profiles become better established, better source apportionment will be possible.
Author : Frances M. Ross
Publisher : Cambridge University Press
ISBN 13 : 1107116570
Total Pages : 529 pages
Book Rating : 4.1/5 (71 download)
Download or read book Liquid Cell Electron Microscopy written by Frances M. Ross and published by Cambridge University Press. This book was released on 2017 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2.6.2 Electrodes for Electrochemistry
Author : H.R. Pruppacher
Publisher : Springer Science & Business Media
ISBN 13 : 0306481006
Total Pages : 975 pages
Book Rating : 4.3/5 (64 download)
Download or read book Microphysics of Clouds and Precipitation written by H.R. Pruppacher and published by Springer Science & Business Media. This book was released on 2010-06-25 with total page 975 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cloud physics has achieved such a voluminous literature over the past few decades that a significant quantitative study of the entire field would prove unwieldy. This book concentrates on one major aspect: cloud microphysics, which involves the processes that lead to the formation of individual cloud and precipitation particles. Common practice has shown that one may distinguish among the following addi tional major aspects: cloud dynamics, which is concerned with the physics respon sible for the macroscopic features of clouds; cloud electricity, which deals with the electrical structure of clouds and the electrification processes of cloud and precipi tation particles; and cloud optics and radar meteorology, which describe the effects of electromagnetic waves interacting with clouds and precipitation. Another field intimately related to cloud physics is atmospheric chemistry, which involves the chemical composition ofthe atmosphere and the life cycle and characteristics of its gaseous and particulate constituents. In view of the natural interdependence of the various aspects of cloud physics, the subject of microphysics cannot be discussed very meaningfully out of context. Therefore, we have found it necessary to touch briefly upon a few simple and basic concepts of cloud dynamics and thermodynamics, and to provide an account of the major characteristics of atmospheric aerosol particles. We have also included a separate chapter on some of the effects of electric fields and charges on the precipitation-forming processes.
Author : Frank Edward Augustine
Publisher :
ISBN 13 :
Total Pages : 205 pages
Book Rating : 4.:/5 (882 download)
Download or read book Airborne Sampling of Particles Emitted to the Atmosphere from Kraft Paper Mill Processes and Their Characterization by Electron Microscopy written by Frank Edward Augustine and published by . This book was released on 1973 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high volume sampling system, employing Nuclepore filters and designed for sampling particulate in the plumes from industrial sources using a light aircraft, is described. The effluent of kraft paper mills was sampled using this system and then analyzed by electron microscopy. Size distributions of particles were obtained at several points downwind in the plume from a kraft mill. The size distribution close into the stack was log normal. There was a statistically significant reduction in median particle size a mile to two miles downwind of the stack. Also, the size distribution deviated from log normal. Several possible mechanisms are postulated as causes for this phenomena. Plume dilution with particles of smaller average size appeared to be a significant factor in causing the decrease. The median particle size close to the kraft mill was about 0. 35 micrometers. At downwind points it was found to be as low as 0. 15 micrometers. Chemical identification of kraft mill particles was accomplished using electron diffraction techniques. Kraft mill salt cake was identified in particulate samples collected as far downwind from the mill as eight miles. Sodium sulfate (Na2SO4) and calcium carbonate (CaCO3) particles were both identified. Morphological associations were made with chemical identity. Sodium sulfate morphology was related to sampling technique. Due to the presence of water in the plume this compound appeared to have been fluid when sampled, and to have crystallized as a hydrate in a flat, smeared form on the filter. Calcium carbonate was a relatively large flaky particle appearing in both anhydrous and hydrated forms. Approximately 100 electron micrographs including both transmission and scanning micrographs are presented which support the sizing and morphological results.
