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Advisor(s)
Abstract(s)
Natural additives are generally considered as producing no harmful efifects on
consumers' health, contrarilyto some artificial compounds [l].
Rose petals might be an important source of anthocyanins with potential use as a
natural colorant in the food industry [2].
In this study, an aqueous extract from rose was tested as an alternative to E 163 to
be incorporated into yogurts. Besides comparing the coloring capacity, the potential
occurrence of changes in the proximate composition (AOAC methods), free sugars
(HPLC-RI) and fatty acids (GC-FID) was also assessed.
Yogurts were evaluated immediately after incorporating the rose extract and once
again after 7 days of storage. Furthermore, the prepared yogurts were compared with
a "blank" (free ofany additive) yogurt formulation.
Two anthocyanins were detected in rose petals, being cyanidin-3, 5-di-0-glucoside the
major compound (13. 19±0.01 |ig/g extract).
The yogurts prepared with the aqueous extract of rose, presented simüar proximate
composition and free sugars profile to those prepared with E 163 and to the "blank" yogurt.
Thus, the rose extract might be an efiFective alternative to E163, considering the main
purpose of its coloring effect in the yellow-orange series. In addition to the provided
color, yogurts incorporated with E 163 and yogurts incorporated with rose extract
showed very similar proximate composition, free sugars and fatty acids composition.
Therefore, rose petals have great potential to be used as natural colorants, being an
excellent source of anthocyanins to develop innovative products with new sensorial
and improved bioactive characteristics.
Description
Keywords
Rose petals Anthocyanins Develop dairy products
Citation
Pires, Tânia C.S.P.; Dias, Maria Inês; Barros, Lillian; Barreira, João C.M.; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R. (2018). Rose petals as a source of anthocyanins to develop dairy products with new sensorial and bioactive characteristic. In XXIV Encontro Luso Galego de Química. Porto. ISBN 978-989-8124-24-1