Person:
Romero De Ávila Hidalgo, María Dolores

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First Name
María Dolores
Last Name
Romero De Ávila Hidalgo
URI
https://hdl.handle.net/20.500.14352/80433
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Veterinaria
Department
Farmacia Galénica y Tecnología Alimentaria
Area
Tecnología de los Alimentos
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2015 - 201922020 - 20211
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Author: Escudero Portugués, Rosa María ×

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Now showing 1 - 3 of 3
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    Free-Range Feeding Alters Fatty Acid Composition at the sn-2 Position of Triglycerides and Subcutaneous Fat Physicochemical Properties in Heavy Pigs
    (Animals, 2021) Segura, José; Rey Muñoz, Ana Isabel; Olivares Moreno, Álvaro; Cambero Rodríguez, María Isabel; Escudero Portugués, Rosa María; Romero De Ávila Hidalgo, María Dolores; Palomo Yagüe, Antonio; López Bote, Clemente José
    The nutritional value of fat consumption depends on both the fatty acid composition and the positional distribution of fatty acids within the triglyceride molecule. This research studies the effect of feeding with three different diets (4% lard-enriched; 11.5% high-oleic sunflower-enriched; and extensive feeding mainly with acorns) on the composition of fatty acids in the sn-2 position (and sn-1,3) of triglycerides and the textural properties of subcutaneous fat in heavy Iberian pigs (n = 210 castrated males). A moderate dietary enrichment with oleic acid in mixed diets did not alter the regulation of the sn-2 position of triglyceride (69.9% and 13.9% of palmitic and oleic acids, respectively), but the extremely high intake of oleic acid in pigs fed mainly on acorns changed the proportions of palmitic and oleic acids at the sn-2 position in the subcutaneous fat of pigs (55.0% and 27.2%, respectively). Hardness, adhesiveness, cohesiveness, gumminess, and chewiness showed the least values in EXT pigs, and the greatest values in LARD-fed barrows. SUN cohesiveness and gumminess did not differ from those fed LARD. In addition, Iberian pigs raised in free-range conditions had a more favorable nutritional lipid profile for human health compared to pigs fed conventional diets.
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    Effect of fatty acid composition and positional distribution within the triglyceride on selected physical properties of dry-cured ham subcutaneous fat
    (Meat Science, 2015) Segura Plaza, José Francisco; Escudero Portugués, Rosa María; Romero De Ávila Hidalgo, María Dolores; Cambero Rodríguez, María Isabel; López Bote, Clemente José
    Analysis of fatty acid (FA) positional distribution within the triglyceride (TG) and selected physical properties of dry-cured ham subcutaneous fat (SF) were carried out. The slip point (SP) of the SF was related to the concentration and positional distribution of FA. When C16:0 was in Sn-2, the SP depended on the FA present in Sn-1,3. Hardness was related to the FA concentration in external positions of TG. A significant direct linear correlation between hardness against C18:0, SFA and average chain length (ACL) and inverse against C18:1, C18:2 and PUFA and unsaturation index (UI) in external positions was found. Adhesiveness was related to SFA, C16:0, C18:0, C18:1, MUFA, UI and ACL exclusively in Sn-2 position. A different role of FA in Sn-2 and Sn-1,3 positions on SP and texture properties of fat was found
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    Electron spin resonance (ESR) spectroscopy study of cheese treated with accelerated electrons
    (Food Chemistry, 2019) Escudero Portugués, Rosa María; Segura Plaza, José Francisco; Velasco De Diego, Raquel; Valhondo Falcón, Margarita; Romero De Ávila Hidalgo, María Dolores; Ana Belén Garcia-Garcia; Cambero Rodríguez, María Isabel
    The generation, accumulation and decay of free radicals in six varieties of cheese, irradiated (0–4 kGy) in an electron accelerator, have been studied by electron spin resonance (ESR) spectroscopy. Remarkably, the ESR spectra of all untreated cheeses showed only one singlet signal with a g-factor of 2.0064 ± 0.0005. Surprisingly, the ESR spectra of irradiated samples presented a new signal with g-factor of 2.0037 ± 0.0003 which was independent of the type of cheese, and which might be due to free radicals from the radiolysis of proteins. Surface regression models (P < 0.0001) established the relationship among signal intensity, absorbed dose (0, 1, 2 and 4 kGy) and storage time (0–180 days) for the different types of cheese. Results suggested that the analysis by ESR (or electron paramagnetic resonance, EPR) is suitable to evaluate, either qualitatively or quantitatively, the irradiation treatment of different types of cheese.