Browsing by Subject "Food composition"

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    A contribution to nutritional studies on Crocus sativus flowers and their value as food
    (Elsevier, 2013-08-02) Serrano Díaz, Jéssica; Sánchez, Ana M.; Martínez Tomé, Magdalena; Winterhalter, Peter; Alonso Díaz-Marta, Gonzalo L.; Tecnología de Alimentos, Nutrición y Bromatología
    About 68 kg of flowers are needed to produce 1 kg of saffron spice, while 63 kg of bio-residues composed of tepals, stamens and styles are generated. The proximate composition, minerals, dietary fiber (DF), sugars, anions and organic acids of flowers of saffron, their parts and bio-residues from saffron spice production have been analyzed. Whole flowers have high ash (7.39 mg/100 g), protein (10.07 mg/100 g) and available carbohydrates (61.2 mg/100 g), and are low in lipids (3.16 mg/100 g). Stamens are the flower parts with the highest contents of ash (11.43 mg/100 g), protein (24.05 mg/100 g), lipids (10.73 mg/100 g), total DF (32.2 mg/100 g) and insoluble DF (21.1 mg/100 g), and the lowest available carbohydrates (33.8 mg/100 g) and total sugars (4.3 mg/100 g). The insoluble/soluble DF ratios of floral bio-residues (1.2), stamens (1.9) and stigmas (1.3) are suitable as a balanced source of DF. These results could contribute to the using flowers of saffron as food, as well as the development of new food products from flowers of saffron and the management and exploitation of the bio-residues obtained in saffron spice production.
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    Elemental composition in soft tissues as a model for identifying batches of juvenile Atlantic bluefin tuna (Thunnus thynnus)
    (Elsevier, 2023-01-26) Salvat-Leal, Inmaculada; Ortega, Aurelio; Blanco, Edurne; García, Jaime; Romero, Diego; Ciencias Sociosanitarias
    Integral Atlantic bluefin tuna (Thunnus thynnus) aquaculture will become a reality in the coming years and so tuna batches will have to be clearly identifiable to avoid commercial fraud and ensure this species’ conservation. Consequently, the objective of this study was to analyse the components of juvenile bluefin tissue to be able to discriminate between three tuna batches: specimens born in captivity and raised in inland facilities (onshore tanks), fish born in captivity and raised in the sea (sea cages), and wild tuna. Ten macro and trace elements (Ca, Fe, K, Mg, Na, P, S, Cu, Mn and Zn) were selected, and their concentrations were analysed in four soft tissues: liver, kidney, brain and muscle. Only one of the elements (Cu) showed statistically significant differences for fish batch in all tissues, so multivariate tests (Principal Component Analysis, PCA and Canonical Discriminant Analysis, DCA) were performed. In the PCA, there were partial batches separation in kidney and muscle. In DCA, the percentage of cases correctly classified using this validation were 60.8 % (liver), 88.6 % (kidney), 79.5 % (muscle) and 82.2 % (brain). Globally, muscle appear to be the best tissue for discriminating the batch of tunas, and wild specimens are the most readily identifiable.