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Cimminelli, María José

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https://academica-e.unavarra.es/handle/2454/48855

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Cimminelli

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María José

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Ciencias

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2018 - 20204
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Now showing 1 - 4 of 4
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    PublicationOpen Access
    Stability of phenolic compounds in grape stem extracts
    (MDPI, 2020) Esparza Catalán, Irene; Cimminelli, María José; Moler Cuiral, José Antonio; Jiménez Moreno, Nerea; 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, VARASVI PI022 and PI039
    Grape stem is rich in phenolic compounds, especially stilbenes. These antioxidants can be degraded during the storage of grape stem extracts for long periods of time. The aim of this work was to analyze the stability of Mazuelo stem extracts during storage at 25 and 40◦C, in two different light conditions (amber and transparent vials). The stability of the antioxidants was studied after 2, 4 and 6 months of conservation. Gallic acid and the quercetin derivative concentration were stable throughout the storage period. In contrast, catechin disappeared from all the extracts in just two months of storage. Anthocyanins were significantly affected by temperature, and light enhanced their degradation when the extracts were kept at 40◦C. Resveratrol and viniferin showed a similar behavior. Their concentration decreased from the beginning of storage, and in both cases, they were significantly affected by both temperature and light.
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    PublicationOpen Access
    Análisis de compuestos fenólicos en residuos de alcachofa
    (2018) Cimminelli, María José; Ancín Azpilicueta, Carmen; Jiménez Moreno, Nerea; Escuela Técnica Superior de Ingenieros Agrónomos; Nekazaritza Ingeniarien Goi Mailako Eskola Teknikoa
    La alcachofa es una fuente de compuestos fenólicos con propiedades beneficiosas para la salud, no solo en su parte comestible sino también en las partes desechadas por la industria. Estos residuos se componen de brácteas externas, tallos y hojas que representan entre un 80-85% de la planta y que dada su composición presentan actividad antioxidante. Teniendo en cuenta que, actualmente existe una creciente demanda de aditivos naturales, los subproductos de alcachofa podrían ser considerados como una fuente potencial de estos compuestos. Los objetivos del presente trabajo fueron: (a) estudiar distintos métodos de extracción de compuestos fenólicos de residuos de alcachofa, así como (b) determinar la composición y la concentración de los compuestos fenólicos para cada método de extracción ensayado. Las muestras extraídas con metanol al 60% presentaron un contenido de ácidos hidroxicinámicos y flavonoides significativamente mayor que las extraídas con agua. La aplicación de ultrasonidos aumentó significativamente las concentraciones de ácido clorogénico, cinarina y luteolina-7-O-glucósido de las muestras tratadas con metanol al 60%, mientras que, en las extraídas con agua, incrementó levemente el contenido de apigenina y disminuyó el de narirutina. La presencia de compuestos antioxidantes en los residuos de alcachofa podría ser considerada como una fuente potencial para el reemplazo de antioxidantes sintéticos por naturales.
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    PublicationOpen Access
    Reducing SO₂ doses in red wines by using grape stem extracts as antioxidants
    (MDPI, 2020) Esparza Catalán, Irene; Martínez Inda, Blanca; Cimminelli, María José; Moler Cuiral, José Antonio; Jiménez Moreno, Nerea; 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, VARASVI PI022 and PI038
    SO₂ is a very important wine preservative. However, there are several drawbacks associated with the use of SO₂ in wine. The aim of this work is to evaluate the effect of the partial substitution of SO₂ in the Tempranillo wine by a Mazuelo grape stem extract and by a commercial vine wood extract (Vinetan®). The results were compared with a control sample (with no addition of any extract). After 12 months of storage in a bottle, total anthocyanin content, together with total polyphenol and flavonoid content were slightly higher for control wines than for those treated with extracts. These differences were of little relevance, as no differences in antioxidant activity were found between any of the wines at the end of the study. The sensory analysis revealed that the use of both extracts as partial substitutes of SO₂ could lead to wines with good organoleptic properties, similar or even better to the control ones.
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    PublicationOpen Access
    Phenolic composition of artichoke waste and its antioxidant capacity on differentiated Caco-2 cells
    (MDPI, 2019) Jiménez Moreno, Nerea; Cimminelli, María José; Volpe Sainz, Francesca; Ansó Blanco, Raúl; Esparza Catalán, Irene; Mármol, Inés; Rodríguez Yoldi, María Jesús; Ancín Azpilicueta, Carmen; Zientziak; Institute for Advanced Materials and Mathematics - INAMAT2; Ciencias
    Artichoke waste represents a huge amount of discarded material. This study presents the by‐products (bracts, exterior leaves, and stalks) of the 'Blanca de Tudela' artichoke variety as a potential source of phenolic compounds with promising antioxidant properties. Artichoke residues were subjected to different extraction processes, and the antioxidant capacity and phenolic composition of the extracts were analyzed by spectrophotometric methods and high performance liquid chromatography (HPLC) analyses, respectively. The most abundant polyphenols in artichoke waste were chlorogenic acid, luteolin‐7‐O‐rutinoside, and luteolin‐7‐O‐glucoside. Minor quantities of cynarin, luteolin, apigenin‐7‐O‐glucoside, apigenin‐7‐O‐rutinoside, and naringenin‐7‐O-glucoside were also found. The antioxidant activity of the obtained extracts determined by ABTS [2, 2’‐azinobis (3‐ethylbenzothiazoline‐6‐sulphonic acid)], DPPH (2,2‐diphenyl‐1‐pycrilhydracyl), and FRAP (Ferric Ion Reducing Antioxidant Power) was highly correlated with the total concentration of phenolic compounds. Chlorogenic acid, luteolin‐7‐O‐glucoside, and luteolin‐7‐O‐rutinoside, the most abundant compounds in 60% methanol extracts, are the components most responsible for the antioxidant activity of the artichoke waste extracts. The extract with the best antioxidant capacity was selected to assay its antioxidant potential on a model intestinal barrier. This action of the hydroxycinnamic acids on intestinal cells (Caco-2) was confirmed. In summary, artichoke waste may be considered a very interesting ingredient for food functionalization and for therapeutic purposes.