Isotope Methods for Dating Old Groundwater
Isotope Methods for Dating Old Groundwater

Author: International Atomic Energy Agency

Publisher:

Published: 2013

Total Pages: 0

ISBN-13: 9789201372109

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This guidebook provides theoretical and practical information for using a variety of isotope tracers for dating old groundwater, i.e. water stored in geological formations for periods ranging from about 1000 to one million years. Theoretical underpinnings of the methods and guidelines for their use in different hydrogeological environments are described. The guidebook also presents a number of case studies providing insight into how various isotopes have been used in aquifers around the world. The methods, findings and conclusions presented in this publication will enable students and practicing groundwater scientists to evaluate the use of isotope dating tools for specific issues related to the assessment and management of groundwater resources. In addition, the guidebook will be of use to the scientific community interested in issues related to radioactive waste disposal in geological repositories.

Cottrell and Young's Neuroanesthesia
Cottrell and Young's Neuroanesthesia

Author: James E. Cottrell

Publisher: Elsevier Health Sciences

Published: 2016-10-24

Total Pages: 481

ISBN-13: 0323086314

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Cottrell's Neuroanesthesia 5th Edition, edited by James E. Cottrell, MD, FRCA and William L. Young, MD, delivers the complete and authoritative guidance you need to ensure optimal perioperative safety for neurosurgical patients. Integrating current scientific principles with the newest clinical applications, it not only explains what to do under any set of circumstances but also why to do it and how to avoid complications. Comprehensive updates reflect all of the latest developments in neurosurgical anesthesia, and contributions from many new experts provide fresh insights into overcoming tough clinical challenges. New co-editor William L. Young, MD joins James E. Cottrell, MD, FRCA at the book's editorial helm, providing additional, complementary expertise and further enhancing the book's authority. New chapters keep you current on interventional neuroradiology, anesthetic management of patients with arteriovenous malformations and aneurysms, awake craniotomy, epilepsy, minimally invasive and robotic surgery, and pregnancy and neurologic disease. Comprehensive updates reflect all of the latest developments in neurosurgical anesthesia, and contributions from many new experts provide fresh insights into overcoming tough clinical challenges. Comprehensive and broad coverage of all important aspects of neuroanesthesia, including special patient populations, enables you to find reliable answers to any clinical question. Chapters written by neurointensivists, neurosurgeons, and radiologists provide well-rounded perspectives on each topic. A consistent, logical organization to every chapter makes answers easy to find quickly. Clear conceptual illustrations make complex concepts easier to understand at a glance.

Molybdenum-99 for Medical Imaging
Molybdenum-99 for Medical Imaging

Author: National Academies of Sciences, Engineering, and Medicine

Publisher: National Academies Press

Published: 2016-11-28

Total Pages: 264

ISBN-13: 0309445310

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The decay product of the medical isotope molybdenum-99 (Mo-99), technetium-99m (Tc-99m), and associated medical isotopes iodine-131 (I-131) and xenon-133 (Xe-133) are used worldwide for medical diagnostic imaging or therapy. The United States consumes about half of the world's supply of Mo-99, but there has been no domestic (i.e., U.S.-based) production of this isotope since the late 1980s. The United States imports Mo-99 for domestic use from Australia, Canada, Europe, and South Africa. Mo-99 and Tc-99m cannot be stockpiled for use because of their short half-lives. Consequently, they must be routinely produced and delivered to medical imaging centers. Almost all Mo-99 for medical use is produced by irradiating highly enriched uranium (HEU) targets in research reactors, several of which are over 50 years old and are approaching the end of their operating lives. Unanticipated and extended shutdowns of some of these old reactors have resulted in severe Mo-99 supply shortages in the United States and other countries. Some of these shortages have disrupted the delivery of medical care. Molybdenum-99 for Medical Imaging examines the production and utilization of Mo-99 and associated medical isotopes, and provides recommendations for medical use.