Experiments were undertaken to investigate the feasibility of using propagating ultrasonic waves to find the speed of sound and density of solutions contained in opaque, sealed containers. A portable design is proposed which consists of 3 ultrasonic transducers aligned on a single plane along the surface of a tank. The content is then examined by measuring the time it takes for a signal to reflect off the back wall of the tank and return to another transducer. This time domain response approach delivered a very accurate analysis, with a low spread of results. This report demonstrates that by using this technique, very small changes in density can be observed. The final error in the density has been found to be less than 2%, which is adequate to reliably tell the difference between salt and fresh water.

Technology transfer has played an increasingly important role in historic preservation during the latter half of the twentieth century, a situation attested to by the undertaking of an important congressional study in 1986 that assessed the role of federal agencies in the field. In this book leading researchers update the earlier findings and contribute state-of-the-art reviews and evaluations of technological progress in their areas of expertise.

Contents: the purposes and nature of strategy (a comprehensive 10-year plan); profile of drug abusers (trends in youth drug abuse; health consequences; cost of drug-related crime; illegal drugs remain available); strategic goals and objectives (demand and supply reduction; goals and objectives; measures of effectiveness); a comprehensive approach (youth oriented initiatives; initiatives to reduce drug-related crime and violence; reduce health and social problems; shield our frontiers; reduce drug availability); and resources to implement the strategy.

The Radiological Sciences Dictionary is a rapid reference guide for all hospital staff employed in diagnostic imaging, providing definitions of over 3000 keywords as applied to the technology of diagnostic radiology.Written in a concise and easy to digest form, the dictionary covers a wide variety of subject matter, including:a radiation legislati

Unique analysis of drugs and poisons to facilitate testing in all laboratories even by inexperienced chemists Includes source of chemicals needed for the experiments Texts are composed by 67 experts in analyzing the respective compounds Clear and uniform structure of chapters for ease of reading The text is illustrated by many diagrams and tables

The Hydrocyclone reviews data on the theoretical, design, and performance aspects of the liquid cyclone, hydraulic cyclone, or hydrocyclone. The book aims to be a source of reference to those who are in industries employing the use and application of the hydrocyclone. The text covers the historical development of the cyclone; flow pattern and distribution of velocities within the cyclone body; operational characteristics and areas of application in different phase separations; and the operating and design variables affecting the performance of the hydrocyclone. Categories of cyclone; commercially available cyclone equipment; and the specific industrial applications of the hydrocyclone are also surveyed. The text will be of practical use to industrial engineers, mechanical engineers, plant operators, miners, and researchers.

As part of its scientific activities, the German Research Council on Smoking and Health regularly provides opportunities for scientists to discuss progress in the field of nicotine research. In this context, the Research Council sponsored a Satellite Symposium in Hamburg, June 28-30, 1990 entitled "Effects of Nicotine on Biological Systems". This meeting was held in conjunction with the XIth International Congress of Pharmacology in Amsterdam and follows the first Satellite Symposium on Nicotine which was convened in Brisbane, Australia in 1987. The aim of these conferences has been to discuss state of the art research on the pharmacology and toxicology of nicotine and its metabolites and to integrate this information to help define nicotinic actions on the central and peripheral nervous system as well as to evaluate health or behavioral effects associated with use of this alkaloid. Furthermore, at this conference, potential therapeutic benefits of nicotine for certain disease states were discussed. Smoking and the health effects of smoking were dealt with only as far as they could not be separated from the effects of nicotine. This volume contains the lectures presented at the symposium and illustrates that knowledge of nicotine has advanced considerably in recent years with regard to mechanisms of its actions. Despite such progress however, it is apparent that a' large number of questions remain unanswered, especially in the light of new insight into cellular and molecular mechanisms which can be affected by nicotine.

Widely regarded as the cornerstone text in the field, the successful series of editions continues to follow the tradition of a clear and comprehensive presentation of the physical principles and operational aspects of medical imaging. The Essential Physics of Medical Imaging, 4th Edition, is a coherent and thorough compendium of the fundamental principles of the physics, radiation protection, and radiation biology that underlie the practice and profession of medical imaging. Distinguished scientists and educators from the University of California, Davis, provide up-to-date, readable information on the production, characteristics, and interactions of non-ionizing and ionizing radiation, magnetic fields and ultrasound used in medical imaging and the imaging modalities in which they are used, including radiography, mammography, fluoroscopy, computed tomography, magnetic resonance, ultrasound, and nuclear medicine. This vibrant, full-color text is enhanced by more than 1,000 images, charts, and graphs, including hundreds of new illustrations. This text is a must-have resource for medical imaging professionals, radiology residents who are preparing for Core Exams, and teachers and students in medical physics and biomedical engineering.

Edited and written by an international "who's who" of more than 100 authors, including anesthesiologists, nurse anesthetists, bench scientists, a surgeon, and representatives of industry, this text provides a comprehensive history of anesthesia, unique in its focus on the people and events that shaped the specialty around the world, particularly during the past 70 years when anesthesia emerged from empiricism and developed into a science-based practice.