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Food Process Engineering in a Changing World - 11th International ...

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<strong>in</strong>terval, four aliquots stored <strong>in</strong> m<strong>in</strong>eral water or 0.85% sal<strong>in</strong>e solution. It was observed that, <strong>in</strong><br />

the first week, alg<strong>in</strong>ate-chitosan free obta<strong>in</strong>ed a mass ga<strong>in</strong> of the 8 and 29% for m<strong>in</strong>eral water<br />

and sal<strong>in</strong>e solution respectively. Result was very similar with sal<strong>in</strong>e solution medium, but <strong>in</strong><br />

case for alg<strong>in</strong>ate-chitosan microcapsules the mass ga<strong>in</strong> was 16%. The acid aqueous solution<br />

rema<strong>in</strong>ed clear dur<strong>in</strong>g all time of the analysis. This is suggests that microcapsules are resistant<br />

to gastric juice. However, the microcapsules that were submitted to alkal<strong>in</strong>e treatment,<br />

demonstrated a complete dissolution after 3 h. It can be noted the dissolution process of the<br />

microcapsules <strong>in</strong> acid and alkal<strong>in</strong>e solution. These results demonstrate that alg<strong>in</strong>ate and<br />

alg<strong>in</strong>ate-chitosan microcapsules have an ideal behaviour <strong>in</strong> the human organisms.<br />

A<br />

Figure 1. (A) Matrix alg<strong>in</strong>ate-chitosan free microcapsules, (B) matrix alg<strong>in</strong>ate-chitosan microcapsules on<br />

m<strong>in</strong>eral water medium and (C) matrix alg<strong>in</strong>ate-chitosan free microcapsules, (D) matrix alg<strong>in</strong>ate-chitosan<br />

microcapsules on 0.85% sal<strong>in</strong>e solution dur<strong>in</strong>g 84 days.<br />

CONCLUSION<br />

It was concluded that development of alg<strong>in</strong>ate-chitosan free and alg<strong>in</strong>ate-chitosan<br />

microcapsules for probiotic microorganism immobilization can be storage both <strong>in</strong> m<strong>in</strong>eral<br />

water, as well as <strong>in</strong> 0.85% sal<strong>in</strong>e solution for long period. In addition, alg<strong>in</strong>ate microcapsules<br />

show resistance to acid treatment and susceptibility to alkal<strong>in</strong>e, ideal for liberation of the<br />

bioactive agents <strong>in</strong> <strong>in</strong>test<strong>in</strong>al system.<br />

REFERENCES<br />

[1] Fuller R. 1991. Probiotics <strong>in</strong> human medic<strong>in</strong>e. Gut 32(4), 439-442.<br />

[2] Klien J., Stock J., Vorlop K.D. 1983. Pore size and properties of spherical calcium alg<strong>in</strong>ate<br />

biocatalysts. European Journal Applied Microbiology Biotechnology, 18, 86-91.<br />

2086<br />

C<br />

B<br />

D

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