02204naa a2200241 a 450000100080000000500110000800800410001910000160006024500800007626000090015652014510016565000120161665000210162865000180164965300120166765300240167965300280170370000200173170000190175170000190177070000200178977301530180910288832005-03-28       2003    bl ---       0--  u    #d1 aSANCHES, J.  aDiagnosis of mechanical injuries in avocados by magnetic resonance imaging.  c2003  aSUMMARY  It was aimed at to determine the potential of magnetic resonance imaging use, as non-destructive method, to evaluate the effects of the mechanical injuries in avocados. Matures fruits were used, of 'Quintal' cultivating, and the injuries were submitted by two impacts, in opposed sides of the fruit provoked by free fali from 2.00 m. In the compression injury, they were submitted by a weight of 117.6 N, for 24 hours and in the cut injury, they received four longitudinallesions in opposed sides, with 40.0 length mm and 4.0 depth mm. The injured fruits were stored under atmosphere condi- tions (22 :t 2 °C and 50% UR) and analyzed in magnetic resonance imaging Varian Inova of 2 Tesla, every 5 days, being obtained symmetrical imaging starting from the center of the fruit. The tomo- graphy of magnetic resonance was shown as an effective tool in the detection of internal injuries in avocado fruits. The fruits submitted to the injuries by compression and impact didn't show exter- nallesions, but the images indicated the occurrence of the internallesions and the evolution of the same ones during the ripemng. For impact, the fruits also presented cracks in the pulp adjacent to the pit, which they were filled out by vegetable tissue in 6 days of storage. The cut injury provoked superficial deformations, whose internal effects were also shown in the imaging's, which presen~ed a cicatrisation process during the storage period.  aAbacate  aPersea Americana  aPós-Colheita  aAvocado  ainjurias mecânicas  aRessonância Magnética1 aBISCEGLI, C. I.1 aDURIGAN, J. F.1 aSIMÕES, M. L.1 aSILVA, W. T. L.  tIn: CONGRESO MUNDIAL DEL AGUACATE, 5. Granada - Málaga, out. 2003. Actas volumen II. Málaga, Consejería de Agricultura y Pesca, 2003. p. 695-700.