Novel Method Of Determination Of Absorption Coefficient
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Novel Method Of Determination Of Absorption Coefficient
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Author : G. J. McNulty
language : en
Publisher:
Release Date : 1998
Novel Method Of Determination Of Absorption Coefficient written by G. J. McNulty and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Room acoustics has as the key parameter, the absorption coefficient. Traditionally this parameter is obtained by measurement of the reverberation time (RT) which can be long and laborious. This paper avoids a frontal attack on the protracted RT measurement. By measuring the decay of sound from a point source in an enclosed area or known geometry. A family of curves representing the absorption over the entire range of coefficients is used to match the decay of sound already measured. The matching absorption coefficient will then correspond to the absorption of the room. The efficacy of the method is endorsed by the results of two separate in investigations. The entire investigation was carried out in a well acoustically investigated main hall at The Institute Technology Tun Hussein Onn(ITTHO) where the RT has shown a convincing repeatability over some twelve separate investigations. [Authors' abstract].
Absorption
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Author : R. Zarzycki
language : en
Publisher: Elsevier
Release Date : 2013-10-22
Absorption written by R. Zarzycki and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Technology & Engineering categories.
This book gives a practical account of the modern theory of calculation of absorbers for binary and multicomponent physical absorption and absorption with simultaneous chemical reaction. The book consists of two parts: the theory of absorption and the calculation of absorbers. Part I covers basic knowledge on diffusion and the theory of mass transfer in binary and multicomponent systems. Significant stress is laid on diffusion theory because this forms the basis for the absorption process. In the next chapters the fundamentals of simultaneous mass transfer and chemical reaction, the theory of the desorption of gases from liquids and the formulation of differential mass balances are discussed. Part II is devoted to the calculation of absorbers and the classification of absorbers. The chapters present calculation methods for the basic types of absorber with a detailed analysis of the calculation methods for packed, plate and bubble columns. The authors illustrate the presented material with a large number of examples, starting with simple ones for binary systems and ending with column calculation for multicomponent systems.
Principles And Practice Of X Ray Spectrometric Analysis
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Author : E.P. Bertin
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Principles And Practice Of X Ray Spectrometric Analysis written by E.P. Bertin and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Since the first edition of this book was published early in 1970, three major developments have occurred in the field of x-ray spectrochemical analysis. First, wavelength-dispersive spectrometry, in 1970 already securely established among instrumental analytical methods, has matured. Highly sophisticated, miniaturized, modular, solid-state circuitry has replaced elec tron-tube circuitry in the readout system. Computers are now widely used to program and control fully automated spectrometers and to store, process, and compute analytical concentrations directly and immediately from ac cumulated count data. Matrix effects have largely yielded to mathematical treatment. The problems associated with the ultralong-wavelength region have been largely surmounted. Indirect (association) methods have extended the applicability of x-ray spectrometry to the entire periodic table and even to certain classes of compounds. Modern commercial, computerized, auto matic, simultaneous x-ray spectrometers can index up to 60 specimens in turn into the measurement position and for each collect count data for up to 30 elements and read out the analytical results in 1--4 min-all corrected for absorption-enhancement and particle-size or surface-texture effects and wholly unattended. Sample preparation has long been the time-limiting step in x-ray spectrochemical analysis. Second, energy-dispersive spectrometry, in 1970 only beginning to assume its place among instrumental analytical methods, has undergone phenomenal development and application and, some believe, may supplant wavelength spectrometry for most applications in the foreseeable future.
Cavity Ring Down Spectroscopy
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Author : Giel Berden
language : en
Publisher: John Wiley & Sons
Release Date : 2009-08-11
Cavity Ring Down Spectroscopy written by Giel Berden and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-08-11 with Science categories.
Cavity Ring-Down Spectroscopy: Techniques and Applications provides a practical overview of this valuable analytical tool, explaining the fundamental concepts and experimental methods, and illustrating important applications. Designed as both an introductory text and a reference source, this book is relevant for scientists unfamiliar with CRDS who are interested in using the technique in their research, as well as experienced users.
Introduction To X Ray Spectrometric Analysis
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Author : Eugene P. Bertin
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Introduction To X Ray Spectrometric Analysis written by Eugene P. Bertin and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
X-ray fluorescence spectrometry has been an established, widely practiced method of instrumental chemical analysis for about 30 years. However, although many colleges and universities offer full-semester courses in optical spectrometric methods of instrumental analysis and in x-ray dif fraction, very few offer full courses in x-ray spectrometric analysis. Those courses that are given are at the graduate level. Consequently, proficiency in this method must still be acquired by: self-instruction; on-the-job training and experience; "workshops" held by the x-ray instrument manu facturers; the one- or two-week summer courses offered by a few uni versities; and certain university courses in analytical and clinical chemistry, metallurgy, mineralogy. geology, ceramics. etc. that devote a small portion of their time to applications of x-ray spectrometry to those respective disciplines. Moreover, with all due respect to the books on x-ray spectrometric analysis now in print, in my opinion none is really suitable as a text or manual for beginners in the discipline. In 1968, when I undertook the writing of the first edition of my previous book, Principles and Practice of X-Ray Spectrometric Analysis,* my objective was to provide a student text. However, when all the material was compiled, I decided to provide a more comprehensive book, which was also lacking at that time. Although that book explains principles, instrumentation, and methods at the begin ner's level, this material is distributed throughout a mass of detail and more advanced material.
Photothermal Spectroscopy Methods
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Author : Stephen E. Bialkowski
language : en
Publisher: John Wiley & Sons
Release Date : 2019-04-16
Photothermal Spectroscopy Methods written by Stephen E. Bialkowski and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-04-16 with Science categories.
Covers the advantages of using photothermal spectroscopy over conventional absorption spectroscopy, including facilitating extremely sensitive measurements and non-destructive analysis This unique guide to the application and theory of photothermal spectroscopy has been newly revised and updated to include new methods and applications and expands on applications to chemical analysis and material science. The book covers the subject from the ground up, lists all practical considerations needed to obtain accurate results, and provides a working knowledge of the various methods in use. Photothermal Spectroscopy Methods, Second Edition includes the latest methods of solid state and materials analysis, and describes new chemical analysis procedures and apparatuses in the analytical chemistry sections. It offers a detailed look at the optics, physical principles of heat transfer, and signal analysis. Information in the temperature change and optical elements in homogeneous samples and photothermal spectroscopy in homogeneous samples has been updated with a better description of diffraction effects and calculations. Chapters on analytical measurement and data processing and analytical applications are also updated and include new information on modern applications and photothermal microscopy. Finally, the Photothermal Spectroscopy of Heterogeneous Sample chapter has been expanded to incorporate new methods for materials analysis. New edition updates and expands on applications to chemical analysis and materials science, including new methods of solid state and materials analysis Includes new chemical analysis procedures and apparatuses Provides an unmatched resource that develops a consistent mathematical basis for signal description, consolidates previous theories, and provides invaluable insight into laser technology Photothermal Spectroscopy Methods, Second Edition will appeal to researchers from both academia and industry (graduate students, postdocs, research scientists, and professors) in the general field of analytical chemistry, optics, and materials science, and researchers and engineers at scientific instrument developers in fields related to photonics and spectroscopy.
Absorption Correction Tables For Microprobe Analysis
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Author : J. W. Colby
language : en
Publisher:
Release Date : 1964
Absorption Correction Tables For Microprobe Analysis written by J. W. Colby and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Microchemistry categories.
Natural Stone Test Methods Determination Of Water Absorption Coefficient By Capillarity
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Author : British Standards Institute Staff
language : en
Publisher:
Release Date : 1999-08-15
Natural Stone Test Methods Determination Of Water Absorption Coefficient By Capillarity written by British Standards Institute Staff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-08-15 with categories.
Stone, Construction materials, Water-absorption tests, Water absorption, Capillarity, Test equipment, Test specimens, Specimen preparation, Formulae (mathematics), Regression analysis, Bibliography
Analytical Absorption Spectrophotometry In The Visible And Ultraviolet
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Author : L. Sommer
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Analytical Absorption Spectrophotometry In The Visible And Ultraviolet written by L. Sommer and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Science categories.
Despite the existence of many competitive analytical techniques, molecular absorption spectrophotometry still remains very popular in practice, particularly in biochemical, clinical, organic, agricultural, food and environmental analyses. This is due mainly to the inherent ease and relative simplicity of spectrophotometric procedures and the availability of reliable and highly-automated instruments. Moreover, the method and its instrumentation has recently undergone considerable development resulting in some new special approaches of spectrophotometry in the ultraviolet (UV) and visible (VIS) regions.Although there are a number of comprehensive textbooks dealing with UV/VIS spectrophotometry, they tend to describe historical aspects or contain collections of detailed procedures for the determination of analytes and do not reflect sufficiently the present state of the method and stage of development reached. This book provides a concise survey of the actual state-of-the-art of UV/VIS spectrophotometry.Special attention has been paid to problems with the Bouguer-Lambert-Beer law, absorption spectra, present trends in instrumentation, errors in spectrophotometry, evaluation of analyte concentration and calibration, optimization procedures, multicomponent analysis, differential spectrophotometries, problem of blanks, derivative and dual-wavelength spectrophotometry, spectrophotometric titration, the strong relations between complex formation and spectrophotometry, spectrophotometric investigation of complex equilibria and stoichiometry or automation in spectrophotometry. The significance of spectrophotometry in connection with liquid-liquid extraction, reaction kinetics, trace analysis, environmental and clinical analysis is also covered.The text is supported by tables and figures, and numerous references are provided for each topic treated. The book is written for all those who use UV/VIS spectrophotometry in the laboratory and will also be useful to students as supplementary reading.
Radiation Dosimetry Instrumentation And Methods 2001
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Author : Gad Shani
language : en
Publisher: CRC Press
Release Date : 2017-11-22
Radiation Dosimetry Instrumentation And Methods 2001 written by Gad Shani and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-11-22 with Medical categories.
Radiation dosimetry has made great progress in the last decade, mainly because radiation therapy is much more widely used. Since the first edition, many new developments have been made in the basic methods for dosimetry, i.e. ionization chambers, TLD, chemical dosimeters, and photographic films. Radiation Dosimetry: Instrumentation and Methods, Second Edition brings to the reader these latest developments. Written at a high level for medical physicists, engineers, and advanced dosimetrists, it concentrates only on evolvement during the last decade, relying on the first edition to provide the basics.