http://hdl.handle.net/11336/90360 Capítulos de libros de INST. DE INVESTIGACION Y DES. EN ING. DE PROCESOS, BIOTECNOLOGIA Y ENERGIAS ALTERNATIVAS 2024-07-01T02:22:42Z http://hdl.handle.net/11336/232267 Yeasts in the Beverage Industry: Patagonia Gets Wild Gonzalez Flores, Melisa; Bruzone, María Clara; Origone, Andrea Cecilia; Burini, Julieta Amalia; Rodríguez, María Eugenia; Lopes, Christian Ariel; Libkind Frati, Diego Yeasts are intimately involved in the production of fermented alcoholic beverages being the most popular examples of beer, cider and wine. The present chapter reviews the impact of yeasts in the production of these three fermented beverages and focuses on recent innovation trends regarding the use of nonconventional yeasts for the increase of flavour complexity and/or the development of novel special products that better meet current customer’s demands. The granting of regional identity by using locally sourced yeast strains is also revised, and the experience gathered in the region of Andean Patagonia (Argentina) related to the isolation, screening, selection, improvement (in some cases) and all the way to the industrial application is described. North-western Patagonia natural forests harbour yeasts species of great scientific and fundamental relevance, among which the cryotolerant species Saccharomyces uvarum and Saccharomyces eubayanus are the most important for this chapter. The successful cases reviewed here of the study and application of Patagonian cold-adapted wild Saccharomyces yeasts for beer, cider, and wine innovation demonstrate that the laborious journey from nature to industry application is feasible and advantageous. 2022-01-01T00:00:00Z http://hdl.handle.net/11336/232195 Concepto de biorrefinería: Desarrollo sostenible y propuesta de proceso limpio en la extracción de compuestos fenólicos de residuos industriales de pistacho (Pistacia vera var. Kerman); Biorefinery concept: Sustainable development and proposal of clean process of the extraction of phenolic compounds from pistachio (Pistacia vera var. Kerman) industrial wastes Zalazar García, Daniela Inés Yanina; Rodriguez, Rosa Ana; Fabani, Maria Paula; Mazza, German Delfor; Echegaray, Marcelo Eduardo; Zabaleta Nievas, Romina Belén; Sanchez, Eliana; Torres, Erick David El procesamiento industrial del pistacho genera biorresiduos que pueden ser reutilizados como precursores de componentes bioactivos de interés como los compuestos fenólicos (CF). Por ello, el objetivo de este trabajo es optimizar las condiciones de extracción por agitación (EAM) y de extracción asistida por ultrasonidos (EAU) de CF utilizando la metodología de superficie de respuesta (MSR). Se utilizó un diseño central compuesto (DCC) para analizar los efectos de las variables independientes: relación etanol: agua (E-A) y tiempo de extracción. Además, se evaluaron diferentes alternativas del proceso de extracción mediante un análisis exergético. Se calcularon los consumos de energía y agua, las emisiones de CO2 y el rendimiento exergético. Las condiciones óptimas para la extracción de CF mediante el método EAU fueron la E-A de 0,5 y un tiempo de extracción de 0,7 y 0,94 h. Para EAM, las condiciones óptimas fueron una la E-A de 0,6 y un tiempo de extracción de 2 y 2,7 h. Un periodo de extracción más largo, para ambas extracciones, produce reacciones de degradación y, por tanto, una pérdida de actividad de captura de radicales. EAM tuvo valores óptimos de E-A comparables a los correspondientes a EAU. Sin embargo, EAM requiere más tiempo para producir ruptura en la célula, disolución y difusión de los compuestos bioactivos en los extractos. De los resultados de la simulación, se encontró, que el uso de reciclo es conveniente ya que, la exergía de las corrientes no se desperdicia al verterlas al medioambiente. El consumo de energía para la alternativa recomendada, y que usa una relación de E-A 1/1 que incluye el reciclo de solventes, (E-W 1/1 Rec) fue de 567 MJ/h y su emisión de CO2 fue de 105 kg/h. La destrucción de exergía indica que las etapas de evaporación y destilación pueden optimizarse hacia una operación más sostenible.; Industrial pistachio processing generates biowaste that can be reused as precursors of bioactive compounds of interest such as phenolic compounds (PC). Therefore, the aim of this work is to optimize the conditions of stirred extraction (SSE) and ultrasound-assisted extraction (UAE) of PCs using the response surface methodology (RSM). A central composite design (CCD) was used to analyze the effects of the independent variables: ethanol: water (E-A) ratio and extraction time. In addition, different alternatives of the extraction process were evaluated by means of an exergy analysis. Energy and water consumption, CO2 emissions and exergetic efficiency were calculated. The optimum conditions for CF extraction by the EAU method were E-A of 0.5 and an extraction time of 0.7 and 0.94 h. For EAM, the optimum conditions were an E-A of 0.6 and an extraction time of 2 and 2.7 h. A longer extraction period, for both extractions, results in degradation reactions and thus a loss of radical scavenging activity. EAM had optimal E-A values comparable to those corresponding to EAU. However, EAM requires more time to produce cell rupture, dissolution and diffusion of the bioactive compounds in the extracts. From the simulation results, it was found that the use of recirculation is convenient since the exergy of the streams is not wasted by discharging them into the environment. The energy consumption for the recommended alternative, which uses an E-A 1/1 ratio including solvent recycling (E-W 1/1 Rec), was 567 MJ/h and its CO2 emission was 105 kg/h. The exergy destruction indicates that the evaporation and distillation stages can be optimized towards a more sustainable operation. 2022-01-01T00:00:00Z http://hdl.handle.net/11336/184592 Hidrocarburos en microescala: experimentos para obtener e identificar alquenos y alquinos Funes, Israel German Aristoteles; Peralta, Marcos Emanuel; Roca Jalil, María Eugenia; Savini, Monica Claudia; Parolo, Maria Eugenia El presente trabajo propone la síntesis en microescala de dos hidrocarburos insaturados: isobuteno y fenilacetileno, y el estudio de sus propiedades químicas mediante su interacción con diferentes reactivos. El principal objetivo es aplicar en el laboratorio de Química Orgánica la técnica en microescala buscando motivar, formar e implicar a los estudiantes en metodologías amigables con el ambiente y la salud, concientizando sobre la relevancia de introducir nuevas técnicas de enseñanza teórico-experimental para educadores de química. 2020-01-01T00:00:00Z http://hdl.handle.net/11336/148752 Innovative sustainable materials for the photoinduced remediation of polluted waters Prevot, Alessandra Bianco; Arques, Antonio; Carlos, Luciano; Laurenti, Enzo; Magnacca, Giuliana; Nistico, Roberto The valorization of low-cost biobased resources (such as biomasses and their derivatives) as alternative feedstock for the preparation of innovative sustainable materials allows both economic and environmental benefits, for instance when these materials enhance the photodegradation of organic pollutants in water remediation processes. This chapter presents the physicochemical features of biobased substances (BBS) isolated from urban organic residues, and it reports on their performances as chemical auxiliaries in advanced oxidation processes (AOPs). In the homogeneous phase, BBS can indeed promote the direct oxidation of organic pollutants through the formation of many reactive species, and it can also allow running Fenton and photo-Fenton processes at circumneutral pH. Additionally, BBS can be used in heterogeneous phase. In addition, the preparation, characterization, and pollutant photodegradation efficiency of novel heterogeneous systems based on hybrid magnet-responsive materials functionalized with biobased substances is discussed, whereas the functionalization with oxidative enzymes is presented as well. 2019-01-01T00:00:00Z