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Use of Humulus lupulus and Origanum vulgare as Protection Agents Against Oxidative Deterioration in “Deep-Fried Process”: Frying Model Assay with Sunflower Oil and High-Oleic Peanuts

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Abstract

Sunflower oil and peanuts are susceptible to oxidation reactions during the frying process. This study aimed to evaluate the efficacy of hop and oregano essential oils in protecting sunflower oil and peanuts during frying. The sunflower oil was enriched with oregano and hop essential oils (0.02% w/w). These treatments were compared to sunflower oil enriched with BHT (0.02% w/w). All treatments were subjected to a temperature of 170 °C for 8 h. Samples were collected at 0, 2, 4, and 8 h. Chemical oxidation indicators, oxidation volatile compounds, and 2,5-dimethyl pyrazine were measured. Also, a descriptive sensory analysis of fried peanuts was carried out. Oregano and hop essential oils enhanced the oxidative stability of the sunflower oil, while preventing the development of undesirable flavours in the fried peanuts. However, this protection led to the formation of 2,5-dimethyl pyrazine, which is responsible for desirable flavours.

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Data Availability

The datasets generated and/or analysed during the current study are available from the corresponding author on reasonable request.

Abbreviations

BHT:

Butylated hydroxytoluene

BHA:

Butylated hydroxyanisole

ORE:

Sunflower with oregano essential oil

HOP:

Sunflower hop essential oil

CONT:

Negative control

OV:

Oxidation volatile compounds

EOV:

Essential oil volatile compounds

PV:

Peroxide value

CD:

Conjugated dienes

GC-MS:

Gas chromatograph–mass detector

OEO:

Oregano essential oil

HEO:

Hop essential oil

ANOVA:

Analysis of variance

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Acknowledgements

The authors are grateful to the Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba, and the National Scientific and Technical Research Council – Argentina (CONICET). They are also grateful to the peanut company Maniagro, which provided the peanuts for the investigation.

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Authors and Affiliations

Authors

Contributions

Paloma Lucia López. Conceptualization, Methodology, Formal analysis, Writing – original draft. Nicolle Stefani Juncos. Methodology, Formal analysis, Writing – review & editing. Nelson Rubén Grosso. Resources, Writing – review & editing. Rubén Horacio Olmedo. Conceptualization, Resources, Writing – review & editing, Supervision.

Corresponding author

Correspondence to Rubén Horacio Olmedo.

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The authors declare no competing interests.

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López, P.L., Juncos, N.S., Grosso, N.R. et al. Use of Humulus lupulus and Origanum vulgare as Protection Agents Against Oxidative Deterioration in “Deep-Fried Process”: Frying Model Assay with Sunflower Oil and High-Oleic Peanuts. Food Bioprocess Technol (2023). https://doi.org/10.1007/s11947-023-03247-2

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  • DOI: https://doi.org/10.1007/s11947-023-03247-2

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