1,721,303 research outputs found
[Resection of the pelvis due to bone tumor. The first case treated in the Rizzoli Orthopedic Institute in 1914]
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PICCI P, RUGGIERI P, FABBRI N, BIAGINI R, TELLA G, CASADEI R, FERRARO A, DE CRISTOFARO R
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Radiation damage in zircons
No full textMetamictization effects have been investigated in zircons having different uranium and thorium contents and different degrees of metamictization. U and Th contents range from 57 to 2890 ppm and from 27 to 420 ppm, respectively. Parallel to the U and Th increase, density decreases from 4.80 to 4.10 (g/cm(3)) and change in X-ray powder diffraction are noticed. Powder diffraction maxima decrease in intensity, shift to lower 2 theta values, broaden and become asymmetrical with the increment of diffuse-scattering component. Unit cell parameters systematically increase (a = 6.60-6.68 Angstrom, c = 5.97-6.11 Angstrom, V = 260-272 Angstrom(3)) The powder IR spectra show similar variations as X-ray diffraction patterns. There are only minor differences in the two sequences. On the other hand, powder X-ray diffraction patterns and IR spectra give different results during annealing: after heating at 950 degrees C, X-ray diffraction patterns become sharp and well resolved and display a nearly complete structural recovery; IR spectra show that the recovery in the structure in the two metamict zircons is significant, but seems incomplete if compared with the more crystalline samples
Extra-articular resection of the shoulder (Tikhoff-Linberg)
No full textThe authors have reviewed 21 cases of extra-articular resection of the shoulder, using the Tikhoff-Linberg technique, carried out at the Tumour Centre of the Rizzoli Institute. The effectiveness of this method has been evaluated both oncologically (by a study of the resected specimens) and functionally. The possible complications are considered. The authors describe a modification of the technique for tumours of the proximal humerus in which only part of the scapula is removed
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