INVESTIGADORES
NEPOTE Valeria
congresos y reuniones científicas
Título:
Preserving Chemical Stability of Roasted Sunflower Kernels using Edible Coating with Addition of Essential Oils as Natural Antioxidants
Autor/es:
RIVEROS, C.; QUIROGA PR; ASENSIO, C.; GAYOL MF; NEPOTE V; GROSSO NR; NEPOTE V
Lugar:
Chicago
Reunión:
Congreso; IFT 2013 Annual Meeting and Food Expo; 2013
Institución organizadora:
IFT
Resumen:
Due to their high oil content (45-50%) and elevated unsaturated fatty acid
concentration (65-70% linoleic acid), sunflower products are susceptible to developing rancidity through lipid
oxidation. In order to extend the shelf-life of them, synthetic antioxidants are often used. However, their health
safety is questioned. Edible coating added with essential oils from aromatics plants is an alternative to
replace the use of synthetic antioxidants. The purpose of this work was to evaluate the chemical stability of
roasted sunflower kernels coated with carboxymethyl cellulose (CMC) edible coating with the addition of
?tomillo? and ?albahaca? essential oils. The following roasted sunflowers samples were studied: without
additives (RS), coated with CMC (RS-CMC), and coated with CMC added with tomillo essential oil (RS-CMCT),
albahaca essential oil (RS-CMC-A), and BHT (RS-CMC-BHT). Peroxide (PV) and conjugated dienes (CD)
values as chemical indicators of lipid oxidation were measured during storage. Roasted sunflowers samples
were packaged in plastic bags and stored for 40 days at 23 C. ANOVA and LSD-Fisher test was carried out
on the data. RS-CMC-BHT exhibited the lowest PV and CD. RS-CMC, RS-CMC-T and RS-CMC-A showed
lower increase in PV and CD than RS. PVs at the end of storage were 80.68, 70.29, 68.44, 49.32, and 33.88
meqO2/kg in RS, RS-CMC, RS-CMC-A, RS-CMC-T and RS-CMC-BHT, respectively. These results indicate
that CMC added with essential oils preserve the sensory properties of roasted sunflowers. Tomillo essential oil
exhibited the best protecting effect on this product. The addition of edible coatings added with essential oils in
roasted sunflower is a simple process and act as antioxidant barrier that helps to preserve the quality
properties of this product