|
|
|
|
|
| Traffano-Schiffo, Maria Victoria; Tylewicz, Urszula; Laghi, Luca; Castro-Giraldez, Marta; Romani, Santina; Rocculi, Pietro; Ragni, Luigi; Dalla Rosa, Marco; Fito, Pedro J.. |
| Plant cellular structure could be considered a complex organized system where flows are carried out by different solutes or solvents transports systems. Passive transports, which is based on the free energy gradients, involve symplastic, apoplastic and aquaporins transmembrane transports. During osmotic dehydration (OD) treatment the semipermeable membranes such as plasma membrane and tonoplast, are forced to separate, due to the water losses from the vacuoles, starting the process known as plasmolysis, characterized by the loss of the turgor pressure. In the last years, OD has been extensively studied for the partial dehydration of fruits and vegetables in order to obtain semi-moist products; however, it presents some limitations such as the low... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Processing; Packaging and transportation. |
| Ano: 2017 |
URL: http://orgprints.org/33198/1/Electroporation-Traffano-Schiffo%202017.pdf |
| |
|
|
| Mannozzi, Cinzia; Cecchini, Juan Pablo; Tylewicz, Urszula; Siroli, Lorenzo; Patrignani, Francesca; Lanciotti, Rosalba; Rocculi, Pietro; Dalla Rosa, Marco; Romani, Santina. |
| Edible films or coatings could be used as an alternative way of conservation, because of their ability to reduce respiration and transpiration rate, maintain firmness and generally delay fruit senescence. The aim of this research was to evaluate the influence of different types of coating: sodium alginate (Al), pectin (Pe) and sodium alginate plus pectin (Al + Pe), on some blueberries quality characteristics, cell viability and microbial growth during 14 days of storage at 4 °C. Blueberry samples differently coated did not show significant differences in weight loss, pH, soluble solid and dry matter content. However, the application of Al, Pe and Al + Pe improved the firmness of blueberry samples as compared to the uncoated one. Changes in the surface... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Processing; Packaging and transportation. |
| Ano: 2017 |
URL: http://orgprints.org/32927/1/Mannozzi%20et%20al.%2C%202017.pdf |
| |
|
|
| Tylewicz, Urszula; Tappi, Silvia; Mannozzi, Cinzia; Romani, Santina; Dellarosa, Nicolò; Laghi, Luca; Ragni, Luigi; Rocculi, Pietro; Dalla Rosa, Marco. |
| The aim of this work was to evaluate the effect of pulsed electric field (PEF) pre-treatment on mass transfer phenomena, water distribution and some physico-chemical parameters of osmo-dehydrated organic strawberries. For PEF treatments 100 near-rectangular shaped pulses, with fixed pulse width of 100 ms and repetition time of 10 ms were used. Electric fields strength applied were 100, 200 and 400 V/cm . Afterwards, samples were subjected to OD treatments carried out in two different hypertonic solutions (40% w/w), one with sucrose and the other one with trehalose. The results shown that PEF treatment positively affected the mass transfer during OD even at the lowest electric field strength applied (100 V/cm), partially preserving the cell... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Processing; Packaging and transportation. |
| Ano: 2017 |
URL: http://orgprints.org/32933/1/Tylewicz%20et%20al.%2C%202017.pdf |
| |
|
|
| Traffano-Schiffo, Maria Victoria; Laghi, Luca; Castro-Giraldez, Marta; Tylewicz, Urszula; Rocculi, Pietro; Ragni, Luigi; Dalla Rosa, Marco; Fito, Pedro J.. |
| Osmotic dehydration (OD) is a widely used preservation technique that consists in the reduction in food water activity by the immersion of the biological tissue in hypertonic solutions. The aim of this work was to analyze the effect of pulsed electric fields (PEF) in mass transfer as a pre-treatment of the OD using NMR. In this sense, PEF pre-treatments were done using three different voltages (100, 250 and 400 V/cm) and 60 number of pulse. The OD of kiwifruit was carried out in 61.5% of sucrose solution at 25 °C, for a contact period from 0 to 120 min. The water distribution into the cellular tissue was studied by NMR relaxometry. In conclusion, NMR is an excellent technique for quantifying water molecules according to their interactions in the fruit... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Processing; Packaging and transportation. |
| Ano: 2017 |
URL: http://orgprints.org/32931/1/Traffano-Schiffo%20et%20al.%202017%20%28Food%20Chemistry%29.pdf |
| |
|
|
| Tylewicz, Urszula; Mannozzi, Cinzia; Romani, Santina; Dellarosa, Nicolò; Laghi, Luca; Ragni, Luigi; Tappi, Silvia; Rocculi, Pietro; Dalla Rosa, Marco. |
| In the recent years the fruit organic production has been one the most growing sectors in food industry. Strawberries are a nonclimateric fruits, susceptible to mechanical injury and they are also highly perishable, especially the organic one. Therefore, there is a need to improve the processing of these fruits in order to obtain a semi-dried or osmodehydrated products with higher shelf-life. The aim of this work was to evaluate the effect of PEF pre-treatment on mass transfer phenomena, water distribution and some physico-chemical parameters of strawberries subjected to osmotic dehydration. For the experiment the organic strawberries were purchased in a local market and stored at 4 ± 1 °C before analysing further processing. The fruits were washed and... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Processing; Packaging and transportation. |
| Ano: 2016 |
|
| |
|
|
| Mannozzi, Cinzia; Tylewicz, Urszula; Chinnici, Fabio; Siroli, Lorenzo; Rocculi, Pietro; Dalla Rosa, Marco; Romani, Santina. |
| The aim of this work was to evaluate the efficacy of an innovative edible coating, based on chitosan from mushrooms enriched with procyanidins extracted from grape seeds, on fresh blueberry quality maintenance, (weight loss, pH, dry matter, colour, firmness and antioxidant activity) and microbial growth, during 14 days of storage at 4 °C. For weight loss, pH and dry matter no relevant differences were detected among the control and the differently coated samples at each considered storage time. Chitosan and chitosan + procyanidins coatings promoted a slight decrease of luminosity and an increase of blue hue colour of blueberry samples during the whole storage period. The use of coating promoted an increase in the antiradical activity that was the... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Processing; Packaging and transportation. |
| Ano: 2018 |
URL: http://orgprints.org/32930/1/Mannozzi%20et%20al.%2C%202018.pdf |
| |
|
|
|
