Person:
Moral, Ana

Profesor/a Titular de Universidad
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First Name
Ana
Last Name
Moral
Affiliation
Universidad Pablo de Olavide
Department
Biología Molecular e Ingeniería Bioquímica
Research Center
Centro Interdisciplinar de Estudios Feministas, de las Mujeres y de Género (CINEF)
Area
Ingeniería Química
Research Group
PAIDI Areas
PhD programs
tecnología Química y de Materiales
Identifiers
UPO investigaORCIDScopus Author IDWeb of Science ResearcherIDDialnet IDGoogle Scholar ID

Search Results

Now showing 1 - 10 of 11
  • Publication
    Uso de programas de simulación para promover la pedagogía activa en la docencia universitaria
    (Universidad Pablo de Olavide, 2014-06) Ballesteros Martín, M. M.; Moral, Ana
    La pedagogía activa se fundamenta en que el alumno sea un sujeto activo en su propio aprendizaje y el docente actúe como un facilitador del proceso. Pese a que esta metodología presenta aspectos muy positivos, la mayoría de acciones se realizan en proyectos de escuelas activas ya que son muchas las dificultades para emplearla en el entorno universitario. Sin embargo, se hace patente la necesidad de un cambio desde el aprendizaje tradicional ¿industrializado¿ hacia una formación permanente, activa y experimentada para lo que resulta imprescindible el manejo de las nuevas tecnologías de información y comunicación (TIC). En este ámbito, resulta especialmente útil el empleo de simuladores, ya que mediante simulación el alumno es capaz de diseñar un modelo de un sistema real y llevar a cabo experiencias con él. En el presente trabajo, se propone el uso del programa informático de simulación de bioprocesos Aspen Batch Process Developer como herramienta para un aprendizaje activo en las enseñanzas prácticas de las asignaturas Procesos Biotecnológicos del Grado en Biotecnología e Ingeniería de los Bioprocesos del Máster en Biotecnología Ambiental, Industrial y Alimentaria de la Universidad Pablo de Olavide. Con el programa informático los alumnos manejarán balances de materia, parámetros de diseño y optimización propios de una industria biotecnológica. Durante el transcurso de las asignaturas se promueve la formación activa de los alumnos mediante el uso de un entorno virtual en el que se deposita material didáctico interactivo.
  • Publication
    Potential Use of Green Alga Ulva sp. for Papermaking
    (Open Journal Systems, 2019) Moral, Ana; Aguado, Roberto; Castelló, Rocío; Tijero, Antonio; Ballesteros, María de la Menta
    The large amount of cellulose found in Ulva sp. and its low percentage of lignin-like compounds make it an interesting raw material for partially substituting wood pulp to produce pulp and paper. This work shows the suitability of mild chemical treatments for papermaking using residual biomass from this green seaweed, harvested on the beaches, in order to give it added value. A chemical characterization was used to determine ethanol-benzene, hot water, and 1% soda extractives, ash content, holocellulose, α-cellulose, and acid-insoluble material. Cellulose extraction was performed with low proportions of soda and hydrogen peroxide, and it was subjected to a refining step. A design of experiments was used to explain the influence of soda (6%, 8%, and 10%) and hydrogen peroxide (2%, 4%, and 6%) based on oven-dry weight, plus refining (1000 PFI revolutions, 3000 PFI revolutions, and 5000 PFI revolutions). The results showed that to attain good paper strength, it is advisable to operate at maximum alkali charge, minimum peroxide concentration, and refine to a high degree.
  • Publication
    Resource recovery and reduction of tidal waste to produce cellulose through sulphur-free pulping
    (SPRINGER, 2023-09-09) Moral, Ana; Greyer, Valeria; Aguado, Roberto; Tijero, Antonio
    The transition towards a sustainable cellulose industry needs more environmentally friendly technologies, including the use of lignocellulosic waste as alternative raw materials. This work shows the potential of dead biomass from the Andalusian Mediterranean coastline to obtain cellulosic pulp. With this purpose, predominant species in onshore residues (mainly Posidonia oceanica) were prepared, characterized, and subjected to a soda-anthraquinone pulping process. A central composite design was defined in order to relate the process conditions to the composition and characteristics of the cellulose pulp. It was concluded that polynomial models encompassing linear, quadratic, and binary efect parameters reproduce the experimental results satisfactorily. Results allowed to choose high anthraquinone dosage, alkali charge and temperature, low liquid/solid ratio and short time as a compromise solution, by which the brightness, ethanol–benzene extractives content, kappa number, lignin content and viscosity were near their optimal. Low values of liquid/solid ratio reduce water consumption, which is of utmost importance in cellulose industries likewise short time treatments to save energy
  • Publication
    Estrategias metodológicas para el aprendizaje basado en proyectos de investigación en Ingeniería de Bioprocesos
    (2015) Moral, Ana; Ballesteros Martín, M. M.; Tijero Cruz, Antonio; Torrecilla, José S.
    El desarrollo de métodos interactivos que propician el intercambio de información entre el alumnado y profesorado ha significado un esfuerzo importante para ambos, ya que rompen con el estrecho espacio formativo que deja la clásica transmisión mecánica y verbalista de conocimientos. Marcando como objetivo la superación del 'argumento de autoridad', se han propuesto diversas estrategias para llevar a cabo procesos de aprendizaje basados en investigación. En el presente estudio se hace un recorrido por los diversos métodos interactivos de enseñanza- aprendizaje haciendo especial hincapié en las estrategias metodológicas del aprendizaje basado en proyectos experimentales debido a su especial relevancia en el ámbito científico. Se propone un método de preselección por parte del alumnado así como cuatro fases principales para llevar a cabo un trabajo de investigación de calidad. La primera fase consiste en una propuesta inicial en la que se ofertan al alumnado los proyectos a elegir por el grupo ECOWAL para realizar el trabajo fin de Máster y en la que el alumnado debe construir una base documental o ¿estado del arte¿. Durante la segunda fase o ¿diseño de la investigación¿ se marcan unos objetivos claros y se diseña el trabajo experimental a realizar. Seguidamente, se propone una tercera fase de recogida y tratamiento de datos y se detalla especialmente cómo realizar el informe con el que concluye la cuarta fase. Los intercambios de ideas, los apoyos que se prestan tanto entre iguales, así como las aportaciones procedentes del docente u otro colaborador, hacen de este sistema un tejido cultural compartido excelente para el aprendizaje del alumnado en el campo de la Ingeniería Química.
  • Publication
    From traditional paper to nanocomposite films: Analysis of global research into cellulose for food packaging
    (Elsevier, 2022) Garrido-Romero, Manuel; Aguado, Roberto; Moral, Ana; Brindley, Celeste; Ballesteros Martín, M. M.
    This bibliometric study encompasses all publications between 2000 and 2020 on the production of cellulosecontaining food packaging, often proposed as an alternative to petro-based materials. Results show a fastgrowing interest in this area, especially during the last decade, with 1029 documents published in highimpact journals. In a topic where countries such as Italy, Sweden and Spain show high scientific production per capita, the most influential groups are based in European institutions (Universit`a degli Studi di Perugia and Grenoble Institute of Technology). Among more than 7000 keywords, those with high co-occurrence were analyzed to identify not only the most important research areas, but also current knowledge gaps. It was found that composites in which cellulose is the reinforcing material, commonly as nanofibers or nanocrystals, are becoming more frequent than cellulose-based packaging. The matrix of such composites is, generally speaking, another biopolymer, but their potential to replace conventional thermoplastic materials remains under question.
  • Publication
    Applications of cellulose-based agents for flocculation processes: a bibliometric analysis
    (Springer, 2021-08-22) Barrero-Fernández, Alejandro; Aguado, Roberto; Moral, Ana; Brindley, Celeste; Ballesteros Martín, M. M.
    Not surprisingly, cellulose-based agents for wastewater treatments, and more precisely for coagulation-flocculation processes, raise growing interest, boosted not only by the high availability, functionality, renewability, and biodegradability of cellulose, but also by the outstanding performance of their derivatives. The analysis of 460 publications including review papers, research articles and book chapters, among others, reveals a multidisciplinary approach, where the fields Materials Science, Chemistry, Chemical Engineering and Environmental Science play a major role. In terms of institutions, some of the most relevant contributors are the Wuhan University, Zhejiang Sci-Tech University, Universidad Complutense de Madrid, to name a few. The most relevant journals were found to be Carbohydrate Polymers, International Journal of Applied Polymer Science and Cellulose. An analysis of 332 keywords allowed us to classify works into three major clusters (besides two minor ones): one mostly defined by cellulose and coagulation; a second one championed by flocculation and cellulose derivatives; and a third one including wastewater treatment and polysaccharides. While the evolution of the scientific production leaves little doubt about it, as depicted in this bibliometric study, this is the first work providing an in-depth assessment and classification of the literature on cellulose for particle aggregation purposes.
  • Publication
    High-Yield Pulp from Brassica napus to Manufacture Packaging Paper
    (Open Journal Systems, 2017) Moral, Ana; Aguado, Roberto; Tijero, Antonio; Tarrés, Quim; Delgado-Aguilar, Marc; Mutjé, Pere
    The stalks that are left on the field after harvesting rapeseed crops could be used to make packaging grade paper. This work evaluates the suitability of mechanical and thermomechanical pulps from rapeseed stalks for papermaking, with a view to alleviating the limitations of recycled fluting. Their performance was compared to that of commercial fluting (recycled fluting) of the same basis weight, 100 g/m2, and to that of virgin pulps from pine wood. The thermomechanical pulp was refined to improve key mechanical properties. Its drainability was found to be very low, even before refining, and its breaking length after beating to 1200 PFI revolutions, 4 km, surpassed that of sheets of recycled fluting that were obtained under similar conditions. These findings support the hypothesis that high-yield pulps from rapeseed stalks are a strong choice of virgin fibres to produce fluting and, generally speaking, packaging paper.
  • Publication
    Revalorización de residuos de algas y fanerógamas marinas mediante tecnologías limpias
    (FUNDACIÓN CONAMA, 2022-11-21) Moral, Ana; Greyer, Valeria; Aguado, Roberto; Tijero, Antonio
    La eutrofización causa acumulación excesiva de algas y fanerógamas marinas en las costas de las playas ocasionando un aumento del número de insectos, nematodos y bacterias que pueden producir problemas sanitarios, medioambientales y económicos que afectan negativamente al turismo. Una alternativa sostenible a su recogida y eliminación es la reutilización como fuente renovable de celulosa para su posterior modificación y transformación en productos con valor añadido. La celulosa extraída mediante tecnologías limpias se modifica químicamente mediante reacciones de mercerización-cationización para obtener compuestos con capacidad floculante que puedan competir con los floculantes sintéticos empleados en el tratamiento de aguas residuales reduciendo la producción de lodos, principal problema medioambiental de las depuradoras. Proyecto: UPO-1381251, FEDER
  • Publication
    Material revalorization of beach wrack comprising seaweed and marine phanerogams: Optimization of hydrothermal treatments
    (ELSEVIER, 2023-06-03) Moral, Ana; Greyer, Valeria; Aguado, Roberto; Tijero, Antonio
    Tidal waste causes accumulation of seaweed and marine plants on coasts, resulting in an.eutrophication process and proliferation of insects, nematodes, and bacteria that negatively affect the beach ecosystem and local human economic activities. This work highlights the potential of beach wrack from the Andalusian Mediterranean coastline as cellulosic materials, in the frame of concepts such as waste management, revalorization, and reduction of hazardous chemicals. With this purpose, beach waste was harvested, washed with water, characterized, and subjected to chemical-free hydrothermal treatments. A central composite design was defined in order to relate the hydrothermal treatment conditions to the composition of the liquid and solid fractions. It was concluded that polynomial models encompassing linear, quadratic, and binary effect parameters reproduce the experimental results satisfactorily (e.g., R2 = 0.97–0.98 for saccharides released). As expected, severe conditions resulted in higher removal of hemicellulose, and of small amounts of lignin along with it, but at the expense of the yield. Results allowed us to choose high temperature (150 °C), short time (30 min) and low liquid/solid ratio (8) as a compromise solution, by which the yield and the outlet concentrations of glucose, xylose, and arabinose approached their optimal values. Although longer times grant further removal of non-fibrous materials, this small difference is compensated by energy savings and reduction on water consumption.
  • Publication
    The relevance of the pretreatment on the chemical modification of cellulosic fibers
    (SPRINGER LINK, 2019-05-20) Aguado, Roberto J.; Lourenço, Ana F.; Ferreira, Paulo J.T.; Moral, Ana; Tijero, Antonio
    Cationized fibers and other kinds of chemically modified fibers impart many advantages in papermaking, but unfeasibly long reaction times are necessary to attain acceptable degrees of substitution, due to the low reactivity of bleached kraft pulps. In this work, different aqueous pretreatments were tested in order to activate cellulose towards a 60 min-long etherification with a quaternary ammonium reagent. Severe decrystallization treatments, namely alkalization with NaOH 20%, NaOH/urea or FeTNa, conducted to the best reactivity results (substitution from 2 to 10%), but the fiber properties were harshly affected. Pretreatments involving H3PO4 at different concentrations were also performed, with distinct results, from unnoticeable effects at 20% to amorphization and excessive depolymerization at 80%. Finally, aqueous ammonium thiocyanate was tested as activator and had little effect on fibers, although the addition of ammonia resulted in high degrees of substitution, while maintaining the pulps’ capability to retain inter-fiber water and cellulose I as the prevalent allomorph.