ISSN:
1745-4603
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The effects of compression on the structure of red Roma tomato (Lycopersicon esculentum) were observed using magnetic resonance imaging (MRI). Images were acquired at six strain levels: 0%, 3%, 6%, 20%, 25% and no load sequentially for each of the replicates. The MR images revealed internal structural changes as the strain level increased; these changes were characterized by three displacement parameters: buckling angle (α), flattening angle (β) and columella position (hc). The relative change of these parameters as a function of strain was evaluated by analysis of variance (ANOVA), which showed that the difference in the means was significant at the 0.05 level. In the post hoc analysis, structural changes at the low strains of 3% and 6% were different than the structural changes at the higher strains of 20% and 25%. The columella position showed significant recovery after the load was released. In addition to structural changes, the NMR signal intensity changed as a result of the compression. In particular, signal intensity from the columella region and upper radial arm increased with strain level. However, further studies are required to analyze these changes statistically.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1745-4603.1998.tb00182.x
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