This study investigates the effect of carrier type on the physical and structural properties of microcapsules of pure carrot juice. Low-crystallised maltodextrin (MD), gum arabic (GA), mixtures of MD and GA (1:1; 2:1; 3:1) and whey protein isolate (WPI) were used as carriers. Microencapsulation was carried out in a spray-drier at inlet air temperature of 160. °C. Powders were investigated for dry matter, water activity, diameter, carotene content and hygroscopicity. In addition, differential scanning calorimetry (DSC) and time domain nuclear magnetic resonance (TD-NMR) were applied to analyse microcapsules glass transition temperature (Tg).Carrot powders with GA used as a carrier material resulted in better carotenoids retention and higher stability of powders in terms of higher Tg, lower aw and good hygroscopic properties. However, all powders showed a low aw (below 0.26) and high dry matter content (98-99%) indicating a good potential for protection of microencapsulated carotenoids during the storage.
The influence of carrier material on some physical and structural properties of carrot juice microcapsules / Janiszewska-Turak, Emilia; Dellarosa, Nicolò; Tylewicz, Urszula; Laghi, Luca; Romani, Santina; Dalla Rosa, Marco; Witrowa-Rajchert, Dorota. - In: FOOD CHEMISTRY. - ISSN 0308-8146. - STAMPA. - 236:(2017), pp. 134-141. [10.1016/j.foodchem.2017.03.134]
The influence of carrier material on some physical and structural properties of carrot juice microcapsules
DELLAROSA, NICOLÒ;TYLEWICZ, URSZULA;LAGHI, LUCA
;ROMANI, SANTINA;DALLA ROSA, MARCO;
2017
Abstract
This study investigates the effect of carrier type on the physical and structural properties of microcapsules of pure carrot juice. Low-crystallised maltodextrin (MD), gum arabic (GA), mixtures of MD and GA (1:1; 2:1; 3:1) and whey protein isolate (WPI) were used as carriers. Microencapsulation was carried out in a spray-drier at inlet air temperature of 160. °C. Powders were investigated for dry matter, water activity, diameter, carotene content and hygroscopicity. In addition, differential scanning calorimetry (DSC) and time domain nuclear magnetic resonance (TD-NMR) were applied to analyse microcapsules glass transition temperature (Tg).Carrot powders with GA used as a carrier material resulted in better carotenoids retention and higher stability of powders in terms of higher Tg, lower aw and good hygroscopic properties. However, all powders showed a low aw (below 0.26) and high dry matter content (98-99%) indicating a good potential for protection of microencapsulated carotenoids during the storage.File | Dimensione | Formato | |
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