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Jiménez Moreno, Nerea

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https://academica-e.unavarra.es/handle/2454/49322

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Jiménez Moreno

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Nerea

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Ciencias

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InaMat2. Instituto de Investigación en Materiales Avanzados y Matemáticas

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0000-0002-8065-5220

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7765

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2019 - 201912020 - 20231
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End date: 2023 × Subject: Bioactive compounds ×

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Now showing 1 - 2 of 2
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    PublicationOpen Access
    Impact of extraction conditions on the phenolic composition and antioxidant capacity of grape stem extracts
    (MDPI, 2019) Jiménez Moreno, Nerea; Volpe Sainz, Francesca; Moler Cuiral, José Antonio; Esparza Catalán, Irene; Ancín Azpilicueta, Carmen; Zientziak; Estatistika, Informatika eta Matematika; Institute for Advanced Materials and Mathematics - INAMAT2; Ciencias; Estadística, Informática y Matemáticas; Gobierno de Navarra / Nafarroako Gobernua
    The use of grape stems for the extraction of bioactive compounds to be used in the pharmaceutical, food, and cosmetic industries is a promising objective. The aim of this work is to determine the influence of the different extraction conditions (temperature, ethanol concentration, and ratio of sample/solvent) on phenolic composition and antioxidant capacity of Mazuelo stem extracts. In general, the ethanol concentration of the extraction solvent was the factor that had the greatest influence on the extraction of different bioactive compounds. The greatest content of total phenolic compounds and the highest antioxidant activity of the extracts were obtained with 50% ethanol and at 40 °C. The most abundant compound found in the different extracts obtained from Mazuelo grape stem was (+)-catechin, but appreciable concentrations of gallic acid, a quercetin derivative, and stilbenes (trans-resveratrol and trans-ε-viniferin) were also extracted. Quercetin and malvidin-3-glucoside showed the highest correlation with the antioxidant capacity of the extracts, while stilbenes did not present such relation. The maximum concentration of gallic acid was extracted with water but the extraction of most of the compounds was maximum on using 50% ethanol. Consequently, the selection of the extraction method to be used will depend on the particular compound to be extracted in greatest quantity.
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    PublicationOpen Access
    Antioxidant properties of bioactive compounds in fruit and vegetable waste
    (MDPI, 2023) Jiménez Moreno, Nerea; Esparza Catalán, Irene; Ancín Azpilicueta, Carmen; Ciencias; Zientziak; Institute for Advanced Materials and Mathematics - INAMAT2
    In recent years, great interest has arisen in the study of compounds with antioxidant activity present in agri-food residues. The growing demand from consumers for antioxidants of natural origin, the continuous growth in the world population and the consequent increase in the amount of food residues generated have greatly promoted this field of research. The search for new uses and applications for all this waste has become a mandatory objective within the framework of global environmental management. But, in addition, it offers a promising opportunity to study the great diversity of bioactive compounds that exist in nature and to analyze their biological activity and the associated health benefits. Among agri-food waste, fruit and vegetable by-products constitute a truly abundant and affordable source of natural antioxidants, such as phenolic compounds. These antioxidant phytochemicals are of great interest for different economic sectors, such as food, pharmaceutical and nutraceutical, the latter having seen an exponential development in recent years.