Laila Bijla, Asma Hmitti, Angela Fadda, Samira Oubannin, Jamila Gagour, Rabha Aissa, Abdellatif Laknifli, El Hassan Sakar, Said Gharby
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引用次数: 0
Abstract
In the present paper, spent coffee grounds (SCG) were investigated for their antioxidant capacity, chemical profiling, and their potential to extend the shelf-life of refined sunflower oil (RSO). Ethanolic SCG extract (SCGE) ability to enhance RSO oxidation, during accelerated aging conditions, was examined at 60°C for 120 days. To this end, oxidative stability was evaluated for RSO added with SCGE (at 0.01%, 0.02%, and 0.03%) in the presence of a negative control (RSO without SCGE) and a positive one consisting in vitamin E (VE, a synthetic antioxidant) using the same concentrations (0.01%–0.03%). Our outcomes reveal that SCG were an important source of oil, protein, carbohydrates, minerals, pigments, phenolics, and flavonoid compounds, and they have high antioxidant capacity. SCGE at 0.03% increased RSO oxidative stability by reducing free fatty acids (FFA), peroxide value (PV), and conjugated dienes (CD) and trienes (CT) compared to the unenriched oil. However, both SCGE and VE had no significant effect (p < 0.05) on the fatty acids profile and iodine value. Furthermore, RSO enriched with SCGE had overall acceptability in the sensory evaluation. In conclusion, SCGE improved RSO oxidative stability, and therefore, it could be used as an efficient natural antioxidant to substitute VE during industrial processes.
Practical Application: It is widely accepted that synthetic antioxidants may be harmful to human health. In such a context, plant-based natural antioxidants proved to be an excellent alternative. The valorization of SCG as a natural antioxidant may represent a cost-effective and sustainable approach for the food industry. The addition of used coffee grounds to refined sunflower oil could enhance its shelf-life, offering a potential alternative to synthetic antioxidants. This may also help to reduce the quantity of coffee waste produced, promoting a circular economy.
期刊介绍:
The European Journal of Lipid Science and Technology is a peer-reviewed journal publishing original research articles, reviews, and other contributions on lipid related topics in food science and technology, biomedical science including clinical and pre-clinical research, nutrition, animal science, plant and microbial lipids, (bio)chemistry, oleochemistry, biotechnology, processing, physical chemistry, and analytics including lipidomics. A major focus of the journal is the synthesis of health related topics with applied aspects.
Following is a selection of subject areas which are of special interest to EJLST:
Animal and plant products for healthier foods including strategic feeding and transgenic crops
Authentication and analysis of foods for ensuring food quality and safety
Bioavailability of PUFA and other nutrients
Dietary lipids and minor compounds, their specific roles in food products and in nutrition
Food technology and processing for safer and healthier products
Functional foods and nutraceuticals
Lipidomics
Lipid structuring and formulations
Oleochemistry, lipid-derived polymers and biomaterials
Processes using lipid-modifying enzymes
The scope is not restricted to these areas. Submissions on topics at the interface of basic research and applications are strongly encouraged. The journal is the official organ the European Federation for the Science and Technology of Lipids (Euro Fed Lipid).