John Bommer Murphy Ii 1957 1986

The growth and development witnessed today in modern science, engineering, and technology owes a heavy debt to the rare, refractory, and reactive metals group, of which niobium is a member. Extractive Metallurgy of Niobium presents a vivid account of the metal through its comprehensive discussions of properties and applications, resources and resource processing, chemical processing and compound preparation, metal extraction, and refining and consolidation. Typical flow sheets adopted in some leading niobium-producing countries for the beneficiation of various niobium sources are presented, and various chemical processes for producing pure forms of niobium intermediates such as chloride, fluoride, and oxide are discussed. The book also explains how to liberate the metal from its intermediates and describes the physico-chemical principles involved. It is an excellent reference for chemical metallurgists, hydrometallurgists, extraction and process metallurgists, and minerals processors. It is also valuable to a wide variety of scientists, engineers, technologists, and students interested in the topic.

The Dow Corning case raised serious questions about the safety of silicone breast implants and about larger issues of medical device testing and patient education. Safety of Silicone Breast Implants presents a well-documented, thoughtful exploration of the safety of these devices, drawing conclusions from the available research base and suggesting further questions to be answered. This book also examines the sensitive issues surrounding women's decisions about implants. In reaching conclusions, the committee reviews: The history of the silicone breast implant and the development of its chemistry. The wide variety of U.S.-made implants and their regulation by the Food and Drug Administration. Frequency and consequences of local complications from implants. The evidence for and against links between implants and autoimmune disorders, connective tissue disease, neurological problems, silicone in breast milk, or a proposed new syndrome. Evidence that implants may be associated with lower frequencies of breast cancer. Safety of Silicone Breast Implants provides a comprehensive, well-organized review of the science behind one of the most significant medical controversies of our time.