Study of Structural Changes of Pumpkin Tissue Before and After Mechanical Loading
Paper
Paper/Presentation Title | Study of Structural Changes of Pumpkin Tissue Before and After Mechanical Loading |
---|---|
Presentation Type | Paper |
Authors | Shirmohammadi, Maryam and Yarlagadda, Prasad K. D. V. |
Journal or Proceedings Title | Proceedings of the 2nd International Conference on Measurement, Instrumentation and Automation (ICMIA 2013) |
Journal Citation | 333-335, pp. 1998-2003 |
Number of Pages | 6 |
Year | 2013 |
Publisher | Scientific.Net |
ISBN | 9783037857502 |
Digital Object Identifier (DOI) | https://doi.org/10.4028/www.scientific.net/AMM.333-335.1998 |
Web Address (URL) of Paper | https://www.scientific.net/AMM.333-335.1998 |
Conference/Event | 2nd International Conference on Measurement, Instrumentation and Automation (ICMIA 2013) |
Event Details | 2nd International Conference on Measurement, Instrumentation and Automation (ICMIA 2013) Parent International Conference on Measurement, Instrumentation and Automation (ICMIA) Delivery In person Event Date 23 to end of 24 Apr 2013 Event Location China |
Abstract | The texture of agricultural crops changes during harvesting, post harvesting and processing stages due to different loading processes. There are different source of loading that deform agricultural crop tissues and these include impact, compression, and tension. Scanning Electron Microscope (SEM) method is a common way of analysing cellular changes of materials before and after these loading operations. This paper examines the structural changes of pumpkin peel and flesh tissues under mechanical loading. Compression and indentation tests were performed on peel and flesh samples. Samples structure were then fixed and dehydrated in order to capture the cellular changes under SEM. The results were compared with the images of normal peel and flesh tissues. The findings suggest that normal flesh tissue had bigger size cells, while the cellular arrangement of peel was smaller. Structural damage was clearly observed in tissue structure after compression and indentation. However, the damages that resulted from the flat end indenter was much more severe than that from the spherical end indenter and compression test. An integrated deformed tissue layer was observed in compressed tissue, while the indentation tests shaped a deformed area under the indenter and left the rest of the tissue unharmed. There was an obvious broken layer of cells on the walls of the hole after the flat end indentations, whereas the spherical indenter created a squashed layer all around the hole. Furthermore, the influence of loading was lower on peel samples in comparison with the flesh samples. The experiments have shown that the rate of damage on tissue under constant rate of loading is highly dependent on the shape of equipment. This fact and observed structural changes after loading underline the significance of deigning postharvesting equipments to reduce the rate of damage on agricultural crop tissues. |
Keywords | Postharvesting loss; Scanning Electron Microscope (SEM); Compression test; Indentation test; Cellular structure |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Series | Applied Mechanics and Materials |
Byline Affiliations | Queensland University of Technology |
https://research.usq.edu.au/item/w455x/study-of-structural-changes-of-pumpkin-tissue-before-and-after-mechanical-loading
Download files
Accepted Version
Study of Structural Changes of Pumpkin Tissue Before and After.pdf | ||
File access level: Anyone |
26
total views23
total downloads1
views this month1
downloads this month