Isabel Viera

ORCID: 0000-0003-2019-9013
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About
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Research Areas
  • Biochemical Analysis and Sensing Techniques
  • Antioxidant Activity and Oxidative Stress
  • Algal biology and biofuel production
  • Meat and Animal Product Quality
  • Phytochemicals and Antioxidant Activities
  • Dye analysis and toxicity
  • Edible Oils Quality and Analysis
  • Microbial Metabolites in Food Biotechnology
  • Fatty Acid Research and Health
  • Seaweed-derived Bioactive Compounds
  • Analytical Chemistry and Chromatography
  • Photosynthetic Processes and Mechanisms
  • Advanced Chemical Sensor Technologies
  • Nuts composition and effects
  • Botanical Research and Applications
  • Food Chemistry and Fat Analysis
  • Animal Nutrition and Physiology
  • Essential Oils and Antimicrobial Activity
  • Cocoa and Sweet Potato Agronomy
  • Consumer Attitudes and Food Labeling
  • Biochemical and biochemical processes
  • Heavy Metals in Plants
  • Food composition and properties
  • Phytochemistry and Bioactive Compounds
  • Frailty in Older Adults

Instituto de la Grasa
2008-2024

Consejo Superior de Investigaciones Científicas
2003-2024

Universidad Pablo de Olavide
2022-2023

Hospital Universitario La Paz
2023

Hospital La Paz Institute for Health Research
2023

Chlorophylls are ingested and effectively absorbed by our organism daily, but the effect of food composition on its bioaccessibility is unknown. Therefore, present research analyses chlorophyll ten commercial foods (guacamole, virgin olive oil, tortellini, basil hummus, creamed spinach, vegetable pasta, green tea chocolate, avocado kiwi juices, pesto sauce), selected based their different nutritional (fat, fiber, protein, carbohydrates) content. The most unexpected result was to correlate...

10.1016/j.foodchem.2022.132805 article EN cc-by-nc-nd Food Chemistry 2022-03-25

Abstract The composition of the oils extracted from acorn fruit three species Mediterranean oaks, Quercus ilex L., Q. suber and faginea was characterized. Both major minor components, including FA, TG, sterols, methyl triterpenic aliphatic alcohols, tocopherols, hydrocarbons, were identified by standard methods MS. High‐resolution GLC HPLC used for quantification. FA profile, together with equivalent carbon numbers TG numbers, compared data other edible vegetable oils. Oil yield, expressed...

10.1007/s11746-004-0921-8 article EN Journal of the American Oil Chemists Society 2004-05-01

Asparagus roots are by-products from asparagus cultivation and they could be considered one of the best sources fructans. These polymers interesting food ingredients for their prebiotic immuno-stimulating characteristics. The aim this work is to characterize fructan profile several varieties grown at different locations pickled three vegetative statuses in order valorize these as source. Fructans were extracted with hot water fractionated into pools according molecular weight (MW). Their...

10.3390/foods11050652 article EN cc-by Foods 2022-02-23

The dietary intake of chlorophylls is estimated to be ≈50 mg d-1 . However, their first pass metabolism and systemic assimilation not well characterized.A group 30 mice are fed a diet rich in chlorophylls, while 10 received standard without (control group). Liver extracts analyzed every 15 days by HPLC-ESI(+)/APCI(+)-hrTOF- MS/MS measure the accretion specific chlorophyll metabolites. profile found livers chlorophyll-rich shows that formation and/or absorption pheophorbides,...

10.1002/mnfr.201800562 article EN Molecular Nutrition & Food Research 2018-07-20

The clean label approach is behind the development of new concept, coloring food, in contrast to regulated food colorants, although few data are available regarding its composition. Consequently, twenty-six commercial green foods (including novel foods) have been analyzed investigate authentic composition different labels. It has identified by HPLC-ESI/APCI-hrTOF-MS2 complete array chlorophylls several them for first time foods. alternative based on mixing blue (such as spirulina) and yellow...

10.1016/j.foodres.2023.112974 article EN cc-by-nc-nd Food Research International 2023-05-16

Abstract A detailed study of the efficacy bleaching process for elimination polycyclic aromatic hydrocarbons in Spanish olive pomace oils has been carried out. For this purpose active carbon with earth was used as absorbent. The amount benzo‐(α)‐pyrene determined by reversed‐phase high‐performance liquid chromatography a Fluorimetric detector. use exhausted filter‐cakes countercurrent processes cake formed and is very efficient reducing initial content before addition fresh adsorbent, thus...

10.1002/ejlt.200390010 article EN European Journal of Lipid Science and Technology 2003-01-01

The current management of alperujo as the main solid by-product from two-phase olive oil extraction system has led to appearance a new liquid effluent that until now was treated together with itself. composition and antioxidant properties its bioactive components at different depths pond were studied using colorimetric HPLC UV MS detectors, DPPH, reducing power rancimat. concentration suspended solids varied between 1.71 8.49 g/L, total fat 0.74 1.47 phenols found 3.74 4.11 which included...

10.3390/foods9070962 article EN cc-by Foods 2020-07-21

The milk fat globule membrane (MFGM) provides infants and adults with several health benefits. These are not derived solely from its unique composition, but also arrangement of lipids in the MFGM that, case newborns, could reach intestine partially intact. Fluorochromes associated lipid derivatives were used to prove a fusion process between cellular differentiated Caco-2 cells. To explore mechanism this interaction, incubations cells carried out presence fusogenic agents or compounds that...

10.1016/j.foodres.2023.113330 article EN cc-by Food Research International 2023-08-01

Background: Non-allomerized chlorophylls a and b are part of great diversity environments: senescent ripened vegetal tissues, processed foods, sediments, fecal pellets, etc. Consequently, the articles characterizing their mass spectrometry behavior belong to variety disciplines. Objective: To compile in single review all information published related 26 chlorophyll derivatives, including chlorophyllides, pheophorbides, pheophytins, hydroxy-, lactone-, pyro-chlorophyll derivatives. Method: A...

10.2174/1385272821666170920164836 article EN Current Organic Chemistry 2018-05-31

The color of virgin olive oils, ranging from intense green to brown-yellow, is one the main selection factors for consumers and a quality criterion in specific legislations. Such coloration due their chlorophyll content depends on composition fruit. Through analytical chemistry (HPLC-hrMSn), biochemistry (enzymatic activity), molecular biology (qRT-PCR) approaches, we have analyzed origin differences among several varieties fruit throughout ripening process. higher biosynthetic capacity...

10.1021/acs.jafc.2c00031 article EN cc-by Journal of Agricultural and Food Chemistry 2022-03-15

Commercial fructans (inulin and oligofructose) are generally obtained from crops such as chicory, Jerusalem artichoke or agave. However, there agricultural by-products, namely asparagus roots, which could be considered potential sources of fructans. In this work, the extracted roots three commercial ones chicory agave were studied in order to compare their composition, physicochemical characteristics, health effects. Asparagus had similar chemical composition others, especially moisture,...

10.3390/foods12010081 article EN cc-by Foods 2022-12-23

The daily ingestion of chlorophylls has been estimated at 50 g, but the knowledge about their bioaccessibility is limited. Different in vitro models have utilized to estimate potential bioavailability, among other factors, diversity structures, chemical properties, and lability hamper investigations. By first time, three extreme food matrices, one rich fiber (vegetable puree), fat (virgin olive oil), liquid (fruit juice), assayed for chlorophyll bioaccessibility, controlling crucial...

10.1021/acs.jafc.1c02815 article EN cc-by Journal of Agricultural and Food Chemistry 2021-07-30

Green teas are nonfermented teas, the quality of which is measured by green color. However, this category encompasses a high number tea varieties that differ in cultivation and processing. For example, leaf or stem/bubble tea, plants cultivated under light shadow regime, powdered unpowdered etc. These variables determine different qualities among (Matcha, Sencha, Gyokuro, etc.) consequently their values on market. Our purpose to if these can exert an influence chlorophyll profile establish...

10.3390/molecules27196171 article EN cc-by Molecules 2022-09-20

The triacylglycerol (TGs) composition of 1, 560 samples subcutaneous fat Iberian purebred and crossbred (iberianxDuroc) pigs reared extensively on three different feeding systems: montanera (M), cebo (C) recebo (R), were determined. Seventeen TG species identified by Gas Chromatography six them (POO, PSO, POL, OOO, SOO, OOL) accounted for 75 %. Significant differences (p < 0.01) found the majority among types feeding. effect duration was also explored a significant positive correlation...

10.3989/gya.2008.v59.i4.526 article EN cc-by Grasas y Aceites 2008-10-28

Secondary varieties of date fruits are often discarded because they do not have commercial value. However, their phytochemicals very similar to those the primary ones and therefore, can be valorized as a source compounds interest, mainly phenols dietary fiber. Their chemical composition changes with ripening, so characterization throughout this process is great significance. Date fruit samples were harvested at Khalal, Rutab, Tamer stages, mixture from ornamental trees was also analyzed....

10.3390/molecules28155807 article EN cc-by Molecules 2023-08-01
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