Changes in minimally processed apple tissue with storage time and temperature: mechanical–acoustic analysis and rheological investigation

Influence of maturity degree, modified atmosphere and anti-browning dipping on texture changes kinetics of fresh-cut apples

“…Another factor involved in the decline of desirable texture is water loss, which leads to a decrease in turgor of the tissue cells. Previous results by Roversi and Piazza (2015) showed that water content of 'Fuji' apple slices decreased from 86.5% to 84% in 30 days of storage at 4°C. This is a non-physiological process associated with the postharvest dehydration of the fruit, and was enhanced with the increasing of storage temperature (Roversi and Piazza, 2015).…”

“…Previous results by Roversi and Piazza (2015) showed that water content of 'Fuji' apple slices decreased from 86.5% to 84% in 30 days of storage at 4°C. This is a non-physiological process associated with the postharvest dehydration of the fruit, and was enhanced with the increasing of storage temperature (Roversi and Piazza, 2015). The dehydration process is rapid in fresh-cut products due to the absence of cuticle and sub-epidermal layers and, hence, to the exposure of internal tissue.…”

“…The dehydration process is rapid in fresh-cut products due to the absence of cuticle and sub-epidermal layers and, hence, to the exposure of internal tissue. It causes a decrease in cell-to-cell adhesion; in wet conditions, the tissue is able to "take up" water and to maintain a turgid pressure inside the cells, which results in high tension of the cell wall and justify the higher elasticity of fresh apples (rigidity or stiffness, dF/dS) (Roversi and Piazza, 2015). As the turgor pressure declines, due to a decrease in available overall moisture, the plant tissue softens.…”

“…Cell wall material (CWM) was extracted according to Roversi and Piazza (2015). Ethanol, methanol, chloroform and pure acetone were of analytical grade and purchased from Sigma Aldrich.…”

Application of Acoustic Emission and Machine Learning to Detect Codling Moth Infested Apples

“…They found that the electrical conductivity correlated well with the number of acoustic events, the energy of the acoustic event, and the amplitude. Roversi and Piazza (2016) showed that acoustic analysis can highlight two main phenomena: sound propagation and the cracking events generating the sound. These two phenomena were correlated with signal amplitude and the number of acoustic events, respectively, according to the research by Zdunek et al (2011).…”