Ancín Azpilicueta, Carmen
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Ancín Azpilicueta
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Carmen
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InaMat2. Instituto de Investigación en Materiales Avanzados y Matemáticas
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Publication Open Access Effects of reduced levels of sulfite in wine production using mixtures with lysozyme and dimethyl dicarbonate on levels of volatile and biogenic amines(Taylor & Francis, 2016) Ancín Azpilicueta, Carmen; Jiménez Moreno, Nerea; Moler Cuiral, José Antonio; Nieto-Rojo, Rodrigo; Urmeneta Martín-Calero, Henar; Química Aplicada; Kimika Aplikatua; Estadística e Investigación Operativa; Estatistika eta Ikerketa OperatiboaPublication Open 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 GobernuaThe 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.Publication Open Access Oak wood extracts applied to the grapevine. An alternative to obtain quality Garnacha wines(Elsevier, 2018) Jiménez Moreno, Nerea; Moler Cuiral, José Antonio; Urmeneta Martín-Calero, Henar; Suberviola Ripa, Julián; Cibriain Sabalza, Félix; Gandía Pascual, Luis; Ancín Azpilicueta, Carmen; Química Aplicada; Kimika Aplikatua; Institute for Advanced Materials and Mathematics - INAMAT2; Estadística e Investigación Operativa; Estatistika eta Ikerketa Operatiboa