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688 results on '"López-Rubio, Amparo"'

24. Extraction of homogeneous lignin oligomers by ozonation of Miscanthus giganteus and vine shoots in a pilot scale reactor

Author

Région Hauts-de-France, Ebrahimi, M. [0000-0001-5399-2929], Acha, V. [0000-0002-8094-4049], Hoang, L. [0009-0002-2688-3078], Martínez-Abad, Antonio [0000-0002-6656-2917], López-Rubio, Amparo [0000-0001-6469-9402], Aussenac, T. [0000-0002-2584-5347], Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Ebrahimi, M., Acha, V., Hoang, L., Martínez-Abad, Antonio, López-Rubio, Amparo, Rhazi, L., Aussenac, T., Région Hauts-de-France, Ebrahimi, M. [0000-0001-5399-2929], Acha, V. [0000-0002-8094-4049], Hoang, L. [0009-0002-2688-3078], Martínez-Abad, Antonio [0000-0002-6656-2917], López-Rubio, Amparo [0000-0001-6469-9402], Aussenac, T. [0000-0002-2584-5347], Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Ebrahimi, M., Acha, V., Hoang, L., Martínez-Abad, Antonio, López-Rubio, Amparo, Rhazi, L., and Aussenac, T.

Abstract

Lignin, a complex phenolic polymer crucial for plant structure, is mostly used as fuel but it can be harnessed for environmentally friendly applications. This article explores ozonation as a green method for lignin extraction from lignocellulosic biomass, aiming to uncover the benefits of the extracted lignin. A pilot-scale ozonation reactor was employed to extract lignin from Miscanthus giganteus (a grass variety) and vine shoots (a woody biomass). The study examined the lignin extraction and modification of the fractions and identified the generation of phenolic and organic acids. About 48 % of lignin was successfully extracted from both biomass types. Phenolic monomers were produced, vine shoots yielding fewer monomers than Miscanthus giganteus. Ozonation generated homogeneous lignin oligomers, although their molecular weight decreased during ozonation, with vine shoot oligomers exhibiting greater resistance to ozone. Extracted fractions were stable at 200 °C, despite the low molecular weight, outlining the potential of these phenolic fractions.

Published
2024

42. Recent Advances in Encapsulation for Food Applications

Author

Fundação para a Ciência e a Tecnologia (Portugal), European Commission, Estevinho, Berta N., López-Rubio, Amparo, Fundação para a Ciência e a Tecnologia (Portugal), European Commission, Estevinho, Berta N., and López-Rubio, Amparo

Abstract

Food-related research is closely related to health. The close relationship between food and health has also been translated to consumers, who now not only pay more attention to their lifestyles and diets but are also aware that the food they consume could play a role in preventing chronic diseases and improving their health. In this sense, food industries are interested in developing new food matrices using modern solutions and techniques [1]. Encapsulation has become an interesting tool to boost functional food design with biotechnological and bioactive applications, which is of significant interest to the food industry [2,3,4]. Encapsulation is a technology used for protecting certain substances (like bioactive molecules) and allowing their controlled release, especially in matrices in which these substances could not otherwise be incorporated [5,6,7].

Published
2024

43. Rheological properties, microstructure and stability of oil-in-water emulsions prepared with mango kernel starch (var. Sugar and Tommy)

Author

Agencia Estatal de Investigación (España), Ministerio de Ciencia, Tecnología e Innovación (Colombia), #NODATA#, Ramírez Brewer, David, Méndez, Daniel A., Garcia Zapateiro, Luis A., López-Rubio, Amparo, Fabra, María José, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Tecnología e Innovación (Colombia), #NODATA#, Ramírez Brewer, David, Méndez, Daniel A., Garcia Zapateiro, Luis A., López-Rubio, Amparo, and Fabra, María José

Abstract

In the present work, the emulsification capacity of the mango kernel starch var Sugar (Sg) and Tommy (To) was investigated. Oil-in-water emulsions were elaborated with Sg and To starch. The chemical composition of the Sg and To showed significant differences (p<0.05) in the phenolic compounds, proteins and amylose content. The microstructure of the emulsions for each concentration of Sg and To (1.5, 3.5 and 6%w/v) showed a packing of the oil droplets and a reduction in their size with increasing oil content. A phase separation was observed for a Sg and To concentration of 1.5%w/v and an oil concentration of 40 and 60%v/v, indicating that there was not a good integration of the oil within the starch gel matrix. The emulsions showed pseudoplastic behaviour (n<1). The consistency index, apparent viscosity, firmness, stickiness and spreadability were higher for the emulsions prepared with the highest oil content. The results obtained provide information on the composition of Sg and To and its capacity for the stabilisation of O/W emulsions, showing an advantage over other starches, which have to be modified to improve their emulsification capacity, thus indicating the great potential of these starches for the development and formulation of new food products

Published
2024

44. In vitro digestibility of proteins from red seaweeds: Impact of cell wall structure and processing methods

Author

European Commission, Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), 0000-0002-1154-0307, #NODATA#, 0000-0003-2973-5329, 0000-0001-6469-9402, 0000-0001-7168-5287, Cebrián Lloret, Vera, Martínez Abad, Antonio, Recio, Isidra, López-Rubio, Amparo, Martínez Sanz, Marta, European Commission, Ministerio de Ciencia e Innovación (España), Agencia Estatal de Investigación (España), 0000-0002-1154-0307, #NODATA#, 0000-0003-2973-5329, 0000-0001-6469-9402, 0000-0001-7168-5287, Cebrián Lloret, Vera, Martínez Abad, Antonio, Recio, Isidra, López-Rubio, Amparo, and Martínez Sanz, Marta

Abstract

This study aimed to assess the nutritional quality and digestibility of proteins in two red seaweed species, Gelidium corneum and Gracilaropsis longissima, through the application of in vitro gastrointestinal digestions, and evaluate the impact of two consecutive processing steps, extrusion and compression moulding, to produce food snacks. The protein content in both seaweeds was approximately 16 %, being primarily located within the cell walls. Both species exhibited similar amino acid profiles, with aspartic and glutamic acid being most abundant. However, processing impacted their amino acid profiles, leading to a significant decrease in labile amino acids like lysine. Nevertheless, essential amino acids constituted 35-36 % of the total in the native seaweeds and their processed products. Although the protein digestibility in both seaweed species was relatively low (<60 %), processing, particularly extrusion, enhanced it by approximately 10 %. Interestingly, the effect of the different processing steps on the digestibility varied between the two species. This difference was mainly attributed to compositional and structural differences. G. corneum exhibited increased digestibility with each processing step, while G. longissima reached maximum digestibility after extrusion. Notably, changes in the amino acid profiles of the processed products affected adversely the protein nutritional quality, with lysine becoming the limiting amino acid. These findings provide the basis for developing strategies to enhance protein quality in these seaweed species, thereby facilitating high-quality food production with potential applications in the food industry.

Published
2024

45. Sewage reclamation process as multifactorial public health risk concern: a longitudinal study

Author

Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Generalitat Valenciana, Ministerio de Ciencia e Innovación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Cuevas Ferrando, Enric, Girón-Guzmán, Inés, Sánchez-Alberola, Santiago, Falcó, Irene, Díaz-Reolid, Azahara, Puchades Colera, Pablo, Ballesteros, Sandra, Coll, José María, Núñez, Eugenia, Fabra, María José, López-Rubio, Amparo, Sánchez Moragas, Gloria, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Generalitat Valenciana, Ministerio de Ciencia e Innovación (España), Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72], Cuevas Ferrando, Enric, Girón-Guzmán, Inés, Sánchez-Alberola, Santiago, Falcó, Irene, Díaz-Reolid, Azahara, Puchades Colera, Pablo, Ballesteros, Sandra, Coll, José María, Núñez, Eugenia, Fabra, María José, López-Rubio, Amparo, and Sánchez Moragas, Gloria

Abstract

This year-long research analysed emerging risks in influent, effluent wastewaters and biosolids from six wastewater treatment plants in Spain's Valencian Region. Specifically, it focused on human enteric and respiratory viruses, bacterial and viral faecal contamination indicators, extended spectrum beta-lactamases-producing Escherichia coli and antibiotic resistance genes. Additionally, particles and microplastics in biosolid and wastewater samples were assessed. Human enteric viruses were prevalent in influent wastewater, with limited post-treatment reduction. Wastewater treatment effectively eliminated respiratory viruses, except for low levels of SARS-CoV-2 in effluent and biosolid samples, suggesting minimal public health risk. Antibiotic resistance genes and microplastics were persistently found in effluent and biosolids, thus indicating treatment inefficiencies and potential environmental dissemination. This multifaced research sheds light on diverse contaminants present after water reclamation, emphasizing the interconnectedness of human, animal, and environmental health in wastewater management. It underscores the need for a One Health approach to address the United Nations Sustainable Development Goals.

Published
2024

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