The effects of drying temperature and dipping on prune quality
Abstract
Modern production of prunes is determined by the requirements of the market, demanding well-dried fruits of uniform size and colour, possessing a harmonious flavour and a noticeable pleasant aroma. Drying of plums is a slow and time-consuming process, since the whole fruits are being dried. Optimisation of the process aimed at reducing the drying time without compromising the quality of the prunes is performed by applying different drying temperatures and preparation treatments, most typically dipping. The testing was performed in three replications using plum fruits of the 'Cacanska Lepotica', 'Mildora', 'Cacanska Rodna' and 'Stanley' cultivars, at the optimum ripening stage required for dry-processing based on the content of soluble solids. Drying was performed at the experimental dryer using the convective (flow-through) drying process, at two constant air temperatures, 90 and 70 degrees C, until obtaining 75% of total dry matter in the prunes. In addition to the control, the fruits... were subjected to a pre-treatment consisting of dipping in boiling water. The quality parameters tested in the dried fruits were the content of sugars, content of acids, sugar/acid ratio and the visual appearance in terms of rejecting fruits of uneven colour. Results indicated the fact that the intensity of drying temperature and dipping have no impact on the chemical composition of the prunes, with the exception of the sucrose content, which is primarily determined by the genotype. In drying at a lower temperature (70 degrees C), dipping reduced the number of fruits not meeting the required colour, in 'Cacanska Lepotica'. At the same time, no impact was observed in the fruits subjected to dipping at 90 degrees C.
Keywords:
sugar-acid ratio / plum / cultivar / chemical compositionSource:
Proceedings of the II International Symposium on Fruit Culture Along Silk Road Countries - Fruits For the Future, 2021, 1308, 241-247Publisher:
- International Society for Horticultural Science, Leuven 1
Funding / projects:
- Content of bioactive components in small and stone fruits as affected by cultivar specificities and growing conditions, and obtaining biologically valuable products by improved and newly developed technologies (RS-MESTD-Technological Development (TD or TR)-31093)
DOI: 10.17660/ActaHortic.2021.1308.34
ISSN: 0567-7572
WoS: 000711941600034
Scopus: 2-s2.0-85105185468
Collections
Institution/Community
Institut za voćarstvoTY - CONF AU - Mitrović, Olga AU - Popović, Branko AU - Kandić, Miodrag AU - Leposavić, Aleksandar AU - Miletić, Nemanja PY - 2021 UR - https://refri.institut-cacak.org/handle/123456789/449 AB - Modern production of prunes is determined by the requirements of the market, demanding well-dried fruits of uniform size and colour, possessing a harmonious flavour and a noticeable pleasant aroma. Drying of plums is a slow and time-consuming process, since the whole fruits are being dried. Optimisation of the process aimed at reducing the drying time without compromising the quality of the prunes is performed by applying different drying temperatures and preparation treatments, most typically dipping. The testing was performed in three replications using plum fruits of the 'Cacanska Lepotica', 'Mildora', 'Cacanska Rodna' and 'Stanley' cultivars, at the optimum ripening stage required for dry-processing based on the content of soluble solids. Drying was performed at the experimental dryer using the convective (flow-through) drying process, at two constant air temperatures, 90 and 70 degrees C, until obtaining 75% of total dry matter in the prunes. In addition to the control, the fruits were subjected to a pre-treatment consisting of dipping in boiling water. The quality parameters tested in the dried fruits were the content of sugars, content of acids, sugar/acid ratio and the visual appearance in terms of rejecting fruits of uneven colour. Results indicated the fact that the intensity of drying temperature and dipping have no impact on the chemical composition of the prunes, with the exception of the sucrose content, which is primarily determined by the genotype. In drying at a lower temperature (70 degrees C), dipping reduced the number of fruits not meeting the required colour, in 'Cacanska Lepotica'. At the same time, no impact was observed in the fruits subjected to dipping at 90 degrees C. PB - International Society for Horticultural Science, Leuven 1 C3 - Proceedings of the II International Symposium on Fruit Culture Along Silk Road Countries - Fruits For the Future T1 - The effects of drying temperature and dipping on prune quality EP - 247 SP - 241 VL - 1308 DO - 10.17660/ActaHortic.2021.1308.34 UR - conv_1625 ER -
@conference{ author = "Mitrović, Olga and Popović, Branko and Kandić, Miodrag and Leposavić, Aleksandar and Miletić, Nemanja", year = "2021", abstract = "Modern production of prunes is determined by the requirements of the market, demanding well-dried fruits of uniform size and colour, possessing a harmonious flavour and a noticeable pleasant aroma. Drying of plums is a slow and time-consuming process, since the whole fruits are being dried. Optimisation of the process aimed at reducing the drying time without compromising the quality of the prunes is performed by applying different drying temperatures and preparation treatments, most typically dipping. The testing was performed in three replications using plum fruits of the 'Cacanska Lepotica', 'Mildora', 'Cacanska Rodna' and 'Stanley' cultivars, at the optimum ripening stage required for dry-processing based on the content of soluble solids. Drying was performed at the experimental dryer using the convective (flow-through) drying process, at two constant air temperatures, 90 and 70 degrees C, until obtaining 75% of total dry matter in the prunes. In addition to the control, the fruits were subjected to a pre-treatment consisting of dipping in boiling water. The quality parameters tested in the dried fruits were the content of sugars, content of acids, sugar/acid ratio and the visual appearance in terms of rejecting fruits of uneven colour. Results indicated the fact that the intensity of drying temperature and dipping have no impact on the chemical composition of the prunes, with the exception of the sucrose content, which is primarily determined by the genotype. In drying at a lower temperature (70 degrees C), dipping reduced the number of fruits not meeting the required colour, in 'Cacanska Lepotica'. At the same time, no impact was observed in the fruits subjected to dipping at 90 degrees C.", publisher = "International Society for Horticultural Science, Leuven 1", journal = "Proceedings of the II International Symposium on Fruit Culture Along Silk Road Countries - Fruits For the Future", title = "The effects of drying temperature and dipping on prune quality", pages = "247-241", volume = "1308", doi = "10.17660/ActaHortic.2021.1308.34", url = "conv_1625" }
Mitrović, O., Popović, B., Kandić, M., Leposavić, A.,& Miletić, N.. (2021). The effects of drying temperature and dipping on prune quality. in Proceedings of the II International Symposium on Fruit Culture Along Silk Road Countries - Fruits For the Future International Society for Horticultural Science, Leuven 1., 1308, 241-247. https://doi.org/10.17660/ActaHortic.2021.1308.34 conv_1625
Mitrović O, Popović B, Kandić M, Leposavić A, Miletić N. The effects of drying temperature and dipping on prune quality. in Proceedings of the II International Symposium on Fruit Culture Along Silk Road Countries - Fruits For the Future. 2021;1308:241-247. doi:10.17660/ActaHortic.2021.1308.34 conv_1625 .
Mitrović, Olga, Popović, Branko, Kandić, Miodrag, Leposavić, Aleksandar, Miletić, Nemanja, "The effects of drying temperature and dipping on prune quality" in Proceedings of the II International Symposium on Fruit Culture Along Silk Road Countries - Fruits For the Future, 1308 (2021):241-247, https://doi.org/10.17660/ActaHortic.2021.1308.34 ., conv_1625 .