Of the samples containing hydrocolloids that with xanthan gum showed the lightest color, which was visually perceived during the product preparation, while the structured fruit samples containing UF were similar to those with TF and carrageenan. Regarding the a* and b* values, despite the statistical difference between formulations, it is clear that all structured passion fruits had color characteristics in the yellow region (+b*), with traces of red (+a*).
4. Conclusions
Based on the results obtain in this study, passion fruit peel flours, treated and untreated, can be used to replace the commercial hydrocolloids considered herein. These flours can be obtained through simple and low cost procedures and had similar technological characteristics regarding stabilizing, emulsifying, thickening and gelling power. Furthermore, it was noted that the treated passion fruit peel flour had higher stabilizer, thickening and gelling power when compared to untreated flour.
Acknowledgements
The authors would like to acknowledge the Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq for granting a scholarship.