منابع مشابه
Using a metal detector to locate a swallowed ring pull.
A 48-year-old man accidently swallowed the ring pull from a soft drink can. He complained of pain in his chest. Chest radiographs were normal. A metal detector emitted a strong response when passed across the front of his chest. Oesophagoscopy was carried out and the ring pull was successfully removed. We recommend the wider use of metal detectors by accident and emergency (A&E) department staf...
متن کاملAnellation and Ring Transformations of Push-pull-functionalized Deoxypyranosiduloses
Reaction of (E)-3-aminomethylene-α-D-erythro-hexopyranosid-2-ulose 5 with substituted 5aminopyrazoles afforded the pyrano-anellated pyrazolo[1,5-a]pyrimidines 8. The treatment of the corresponding (E)-2-aminomethylene-α-D-erythro-hexopyranosid-3-ulose 6 with 5-aminopyrazoles and (benzimidazol-2-yl)acetonitrile yielded in a ring transformation process the D-erythronoyl-pyrazolo[1,5-a]pyrimidine-...
متن کاملRing-lens focusing and push-pull tracking scheme for optical disk systems.
An experimental comparison of the ring-lens and the astigmatic techniques of generating a focus-error signal (FES) in optical disk systems reveals that the ring lens generates a FES curve over two times steeper than that produced by the astigmat. Partly because of this large slope and partly because of its diffraction-limited behavior, the ring-lens scheme exhibits superior performance characte...
متن کاملRevisiting Missing Identity Ring of Iranian cities (A spatial Temporal Analysis of square Elements in Islamic Architecture and urbanism)
From long ago, square has been considered as a space for performing area of cities, and it has been a factor determining the identity of cities through its design and structures. However, with the growth of cities and arrival of modernity management challenges are facing cities. Accordingly, cities have gradually changed into a place for predicting different types of technological, conceptual...
متن کاملMissing Rings in Pinus halepensis – The Missing Link to Relate the Tree-Ring Record to Extreme Climatic Events
Climate predictions for the Mediterranean Basin include increased temperatures, decreased precipitation, and increased frequency of extreme climatic events (ECE). These conditions are associated with decreased tree growth and increased vulnerability to pests and diseases. The anatomy of tree rings responds to these environmental conditions. Quantitatively, the width of a tree ring is largely de...
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ژورنال
عنوان ژورنال: Postgraduate Medical Journal
سال: 2002
ISSN: 0032-5473
DOI: 10.1136/pmj.78.923.512