منابع مشابه
Ophiolites and Their Origins
Ophiolites are the remnants of ancient oceanic crust and upper mantle that were tectonically emplaced into continental margins. They display the only evidence for magmatic, tectonic, and hydrothermal processes associated with seafl oor spreading prior to 170 Ma because no oceanic lithosphere older than this age is preserved in the modern oceans. The occurrence of sheeted dikes, side-byside tabu...
متن کاملNORM sources and their origins.
Naturally Occurring Radioactive Materials, often referred to by the acronym NORM, are and always have been a part of our world. Our planet and its atmosphere contain many different naturally occurring radioactive species, and it and virtually everything, living or inanimate, contains NORM. In the history of mankind, knowledge of the existence of radioactivity is very recent, even when considere...
متن کاملBrazilian Vaccinia Viruses and Their Origins
Although the World Health Organization (WHO) declared global smallpox eradicated in 1980, concerns over emergent poxvirus infections have increased. Most poxvirus infections are zoonotic; exploring their genetic diversity will illuminate the genetic and evolutionary aspects of poxvirus infections, ecology, and epidemiology. In recent decades, several strains of the orthopoxvirus vaccinia virus ...
متن کاملFood taboos: their origins and purposes
Food taboos are known from virtually all human societies. Most religions declare certain food items fit and others unfit for human consumption. Dietary rules and regulations may govern particular phases of the human life cycle and may be associated with special events such as menstrual period, pregnancy, childbirth, lactation, and -- in traditional societies -- preparation for the hunt, battle,...
متن کاملHigh-resolution sonographic spectrum of diverticulosis, diverticulitis, and their complications.
OBJECTIVE The purpose of this study was to evaluate the high-resolution sonographic features of diverticulosis, diverticulitis, and their complications. METHODS During a period of about 4 years 8 months, there were 25 patients with sonographic features of diverticulosis, uncomplicated diverticulitis, and complicated diverticulitis. The clinical symptoms, sonographic features, follow-up invest...
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ژورنال
عنوان ژورنال: American Journal of Roentgenology
سال: 1991
ISSN: 0361-803X,1546-3141
DOI: 10.2214/ajr.156.6.2028876