Spirulina platensis is interesting for the food industry due to its overall composition and high content in Cphycocyanin. However, the sensitivity of C-phycocyanin makes its extraction a delicate process. The present study focuses on assessing the use of ohmic heating (OH) in the recovery of C-phycocyanin and other relevant compounds as an alternative method to freeze-thawing or conventional heating. Different ohmic and conventional heating treatments were applied both to purified C-phycocyanin and Spirulina powder. Evaluation of fluorescence and circular dichroism showed that moderated electric fields increased C-phycocyanin stability. This was confirmed in the extraction trials which revealed that OH assisted extraction at higher temperatures (44 °C), and shorter times (30 min) allowed significant higher extraction yield of C-phycocyanin (45 mg/gdw Spirulina), in comparison with conventional heating and freeze-thawing. OH allowed also up to 80% higher yields in phenolic compounds and carbohydrates.

Ferreira-Santosa, P., Nunesa, R., De Biasio, F., Spigno, G., Gorgoglione, D., Teixeira, J. A., Rocha, C. M. R., Influence of thermal and electrical effects of ohmic heating on Cphycocyanin properties and biocompounds recovery from Spirulina platensis, <<LEBENSMITTEL-WISSENSCHAFT + TECHNOLOGIE>>, 2020; (128): 109491-109491. [doi:10.1016/j.lwt.2020.109491] [http://hdl.handle.net/10807/154448]

Influence of thermal and electrical effects of ohmic heating on Cphycocyanin properties and biocompounds recovery from Spirulina platensis

Spigno, Giorgia;
2020

Abstract

Spirulina platensis is interesting for the food industry due to its overall composition and high content in Cphycocyanin. However, the sensitivity of C-phycocyanin makes its extraction a delicate process. The present study focuses on assessing the use of ohmic heating (OH) in the recovery of C-phycocyanin and other relevant compounds as an alternative method to freeze-thawing or conventional heating. Different ohmic and conventional heating treatments were applied both to purified C-phycocyanin and Spirulina powder. Evaluation of fluorescence and circular dichroism showed that moderated electric fields increased C-phycocyanin stability. This was confirmed in the extraction trials which revealed that OH assisted extraction at higher temperatures (44 °C), and shorter times (30 min) allowed significant higher extraction yield of C-phycocyanin (45 mg/gdw Spirulina), in comparison with conventional heating and freeze-thawing. OH allowed also up to 80% higher yields in phenolic compounds and carbohydrates.
2020
Inglese
Ferreira-Santosa, P., Nunesa, R., De Biasio, F., Spigno, G., Gorgoglione, D., Teixeira, J. A., Rocha, C. M. R., Influence of thermal and electrical effects of ohmic heating on Cphycocyanin properties and biocompounds recovery from Spirulina platensis, <<LEBENSMITTEL-WISSENSCHAFT + TECHNOLOGIE>>, 2020; (128): 109491-109491. [doi:10.1016/j.lwt.2020.109491] [http://hdl.handle.net/10807/154448]
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