Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/18841
Título: Effect of air-drying temperature on the quality and bioactive characteristics of dried galega kale (brassica oleracea l. var. acephala)
Autor: Oliveira, Sara M.
Ramos, Inês
Brandão, Teresa R. S.
Silva, Cristina L. M.
Data: 2015
Citação: OLIVEIRA, Sara M.; RAMOS, Inês; BRANDÃO, Teresa R.S.; SILVA, Cristina L.M. - Effect of air-drying temperature on the quality and bioactive characteristics of dried galega kale (brassica oleracea l. var. acephala). Journal of Food Processing and Preservation. ISSN 1745-4549. vol.39 (6), 2485-2496
Resumo: The objective of this work was to evaluate the drying characteristics and the effect of drying temperature on the quality characteristics of Galega kale without any pretreatment. Drying times of 330, 162, 78 and 51 min provided minimal moisture contents, using temperatures of 35, 50, 70 and 85C, respectively. The L* and a* values diminished and b* increased, resulting in increasing values of chroma, total color difference and browning index, as well as decreasing values of the hue angle. A pronounced effect on the retention of total phenolic compounds and vitamin C losses ranging from 4.8 ± 9.7 to 55.5 ± 7.4% were observed. Regarding antioxidant capacity, losses from 51.7 ± 7.5 to 69.6 ± 3.7% were obtained. Chlorophyll a content decreased with increasing drying temperatures, with losses between 8.9 ± 6.7 and 35 ± 5.6%, while degradation of chlorophyll b was negligible. In conclusion, the air drying of Galega kale without any pretreatment resulted in considerable deterioration of its quality characteristics and nutritional value.
Peer review: yes
URI: http://hdl.handle.net/10400.14/18841
DOI: doi:10.1111/jfpp.12498
Versão do Editor: http://onlinelibrary.wiley.com/doi/10.1111/jfpp.12498/pdf
Aparece nas colecções:CBQF - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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