Technical Abstract Search Details

Technical Abstract Details


Title 209-03 Storage Survival of Different Lactobacilli Encapsulated with Citrus Peels by Spray Drying
Presenter Paola Hernández-Carranza, Aurelio Lopez Malo, Enrique Palou, Maria Teresa Jimenez-Munguia, Universidad de las Américas Puebla, Cholula, Mexico
Abstract Microencapsulation is defined as a packaging technology of a solid, liquid, or gaseous compound that is coated with a polymer film. Among the different coating polymers proposed for probiotic encapsulation are biodegradable polymers with prebiotic effect. Orange (OP) and grapefruit (GP) peels were dried at 37 &#176;C for 24 h and ground to prepare aqueous suspensions with maltodextrin (MD), to complete a total solids content of 25% w/w. These extracts were filtered and inoculated with different strains of Lactobacilli (<i>L. casei, L. reuteri, L. rhamnosus</i>, and <i>L. acidophillus</i>) and subjected to spray drying with an inlet temperature of 145 &#176;C and a mass flux rate of 10 g/min. Powders were stored during 8 wk at 5 and 25 &#176;C and survival was evaluated weekly. The strains were also encapsulated only with MD 25% (w/w) solutions as controls and stored at the same temperatures. The population reduction of each bacteria strain before and after the spray drying process was 1 log cycle. Survival during storage after 8 wk for the strains of <i>L. casei, L. reuteri</i>, and <i>L. rhamnosus</i> was significantly higher than <i>L. acidophilus</i> since bacterial populations remained with a good viability (1x10<sup>7</sup> CFU/g), with a population reduction average of 3.5 log cycles, when using the citrus peels and MD as encapsulating agents; when these strains were encapsulated only using MD, the same population reduction average was obtained but after 5 wk. There were significant differences (p<0.05), in the bacteria population, with respect to the storage temperature of the powders, showing a higher viability in stored powders at 5 &#176;C than at 25 &#176;C. Results suggests a potential prebiotic effect of citrus peels since survival of the bacteria strains was higher using citrus peels than only MD; therefore, these and can be considered as encapsulating agents complements for probiotics with good powder properties.
Year/Location2013 IFT Annual Meeting, July 13 – 16, 2013, Chicago Illinois
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