Download or read book AFRRI s Gamma ray X ray and Fission neutron Calibration Curves for the Lymphocyte Dicentric Assay written by P. G. S. Prasanna and published by . This book was released on 2002 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Facilities are established at the Armed Forces Radiobiology Research Institute (AFRRI) to perform radiation-induced chromosome aberration analysis for biological dosimetry. Whole blood from healthy human volunteers was used after obtaining informed consent. Peripheral blood lymphocytes were exposed in vitro to different types of radiation; sup 60 Co gamma rays (E(gamma) = 1.25 MeV, mean of the absorbed dose distribution of the lineal energy, y(sub D) = 1.9 keV/micrometers, 1 Gy/min); x rays (250 kV(sub p), E = 83 keV, y(sub D) = 4 keV/micrometers, 1 Gy/min); or a fission-spectrum neutron source (E = 0.71 MeV, y(sub D) = 65 keV/micrometers, 0.25 Gy/min). Distribution of radiation-induced dicentrics among cells exhibited Poisson statistics as characterized by the Papworth method (Papworth 1970). Dose-response relationships for the yield of dicentrics for photon sources were fitted with a linear-quadratic model using the maximum-likelihood method and for the neutron source by a weighted linear regression method. Comparison of the data with other published studies is presented. The dose-response relationships for dicentric induction by low-and high-linear energy transfer (LET) radiation are consistent with the single- and two-track model of aberration formation, Y = alpha D + beta D(sup 2). An increase in y(sub D) resulted in an increase in dicentric yield. As expected, fission neutrons induced a significantly higher yield of dicentrics than that caused by low-LET sources. The linear component of the model, corresponding to damage caused by single-tracks, is predominant with fission neutrons so that the dose-effect relationship is essentially linear. An automated metaphase finder system with a satellite scoring utility was used to improve data collection.

Download or read book Calibration In Air Monitoring written by R. L. Chapman and published by ASTM International. This book was released on 1976 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Composition of the Atmosphere with Special Reference to Its Oxygen Content written by Francis Gano Benedict and published by . This book was released on 1912 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Size Exclusion Chromatography written by Sadao Mori and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although size exclusion chromatography (SEC) is perhaps the most popular and widely used technique for determining the molecular weight distribution of polymeric materials, there have been very few texts written on this topic. During the past decade, SEC has experienced a considerable amount of growth in regard to column and detector technology and new applications. With these advances, SEC can now be used for determining absolute molecular weight, polymer chain conformation and size, and branching, as well as polymer solution properties. This book introduces the reader to the fundamentals of SEC with emphasis on practical aspects of the technique, such as column and mobile selection, calibration, new detector capabilities and guidelines for performing SEC on most types of polymers, especially those of industrial importance. This book is intended for either those new to the field of SEC, or for those research workers who require a more comprehensive background.

Download or read book Multidimensional HPLC of Polymers written by Harald Pasch and published by Springer Science & Business Media. This book was released on 2013-06-12 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the principle ideas of combining different analytical techniques in multi-dimensional analysis schemes. It reviews the basic principles and instrumentation of multi-dimensional chromatography and the hyphenation of liquid chromatography with selective spectroscopic detectors and presents experimental protocols for the analysis of complex polymers. It is the consequent continuation of "HPLC of Polymers" from 1999 by the same authors. Like its 'predecessor', this book discusses the theoretical background, equipment, experimental procedures and applications for each separation technique, but in contrast treats multi-dimensional and coupled techniques. "Multidimensional HPLC of Polymers" intends to review the state of the art in polymer chromatography and to summarize the developments in the field during the last 15 years. With its tutorial and laboratory manual style it is written for beginners as well as for experienced chromatographers, and will enable its readers (polymer chemists, physicists and material scientists, as well as students of polymer and analytical sciences) to optimize the experimental conditions for their specific separation problems.

Download or read book Code of Federal Regulations written by and published by . This book was released on 1996 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: Special edition of the Federal Register, containing a codification of documents of general applicability and future effect ... with ancillaries.

Download or read book L S A List of C F R Sections Affected written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Code of Federal Regulations of the United States of America written by and published by . This book was released on 1996 with total page 1182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Code of Federal Regulations is the codification of the general and permanent rules published in the Federal Register by the executive departments and agencies of the Federal Government.

Download or read book Lake Michigan Mass Balance Study LMMB Methods Compendium Organic and mercury sample analysis techniques written by and published by . This book was released on 1997 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Determination of Total X ray Beam Energy with a Calibrated Ionization Chamber written by John S. Pruitt and published by . This book was released on 1962 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the use of an air-filled aluminum-alloy ionization chamber to determine the energy transported by a bremsstrahlung beam with maximum photon energy in the range 6 to 170 Mev. The experimental calibrations of this chamber over this energy range are given, as well as the results of calibration experiments made with a 250-kv constant-potential X-ray tube and with Cs137 and Co60 gamma-rays. Information is presented about the change in calibration when the chamber is used with different experimental conditions, and when either its dimensions or its alloy composition are changed slightly. This report can be used to construct a replica chamber and to determine its absolute calibration between 6 and 170 Mev under a variety of experimental conditions.

Download or read book Photometric Magnitudes of Faint Standard Stars Measured Visually at Harvard Yerkes Lick and McCormick Observatories by Edward C Pickering J A Parkhurst Robert G Aitken Heber D Curtis S A Mitchell Harold L Alden T McN Simpson F W Reed written by Samuel Alfred Mitchell and published by . This book was released on 1923 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Practical Guide to ICP MS written by Robert Thomas and published by CRC Press. This book was released on 2003-12-11 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a field insider with more than 20 years of experience in the development and application of atomic spectroscopy instrumentation, the Practical Guide to ICP-MS offers key concepts and guidelines in a reader-friendly format that is superb for those with limited knowledge of the technique. This reference discusses the fundamental principles, analytical advantages, practical capabilities, and overall benefits of ICP-MS. It presents the most important selection criteria when evaluating commercial ICP-MS equipment and the most common application areas of ICP-MS such as the environmental, semiconductor, geochemical, clinical, nuclear, food, metallurgical, and petrochemical industries.

Download or read book Unsaturated Soils Advances in Geo Engineering written by D.G. Toll and published by CRC Press. This book was released on 2008-06-23 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated Soils: Advances in Geo-Engineering comprises 136 contributions from leading international researchers and practitioners, presented at the First European Conference on Unsaturated Soils (Durham, UK, 2-4 July 2008). The papers report on the latest advances in geo-engineering aspects of unsaturated soils. It is the first collection to focu

Download or read book Scientific Papers of the Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1917 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book NASA Technical Note written by and published by . This book was released on 1966 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Sustainable Construction Materials written by Rathish Kumar Pancharathi and published by Springer Nature. This book was released on 2020-04-17 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents select proceedings of the National Conference on Advances in Sustainable Construction Materials (ASCM 2019) held at the National Institute of Technology, Warangal, India. The book includes contributions from academics and practitioners on low-energy cement technologies, innovative materials and structural technologies towards cost-effective, environment friendly, durable, energy-efficient, and sustainable construction. The topics covered emphasize on cutting-edge, economically viable, and sustainable solutions with an aim to increase profitability, and decrease construction time and overall impact on the built environment. The book will be useful for researchers and practitioners interested in sustainable construction and allied fields.