NEW RESEARCH ARTICLE: Microwave pretreatment to improve extraction efficiency and polyphenol extract richness. Effect on antioxidant bioactivity

Microwave assisted extraction advantages are widely recognised. However, its implementation at an industrial scale is restricted due to microwave limitations. In this work, a microwave pretreatment is proposed as an easy scale-up alternative. The double effect of this pretreatment on extraction yield and on product richness is assessed. Microwaves accelerate the extraction kinetics of most […]

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[Paper]: Extraction of arabinoxylans from wheat bran using hydrothermal processes assisted by heterogeneous catalysts

The extraction/hydrolysis process of arabinoxylans from destarched wheat bran was studied in this work using different mesoporous silica supports and the corresponding RuCl3-based catalysts. The effects of temperature, time, catalyst supports and ruthenium catalysts were investigated and discussed in terms of the arabinoxylans extraction yield and their polymerization degree. Relatively high temperatures (180 ºC), short […]

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Scaling-Up Of SFEE, Identification Of Process Parameters On Product Characteristics And Economic Impact

A scaled-up SFEE equipment (Fig 1) was designed and used for producing sufficient amount of aqueous suspensions for PGSS-drying treatment. Using PGSS-drying water content of aqueous suspensions was extracted, and hence long-term stability of product was increased, without irreversible change on its morphology. The scaled-up SFEE equipment consists of an electrically tempered extractor vessel with […]

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[Thesis]: Bioproducts Processing By SFEE: Application For Liquid And Solid Quercetin Formulations

Dr. Gyorgy Levai  defended past Monday 28 th November his PhD thesis at the University of Valladolid. The thesis was directed by Dr. Ángel Martín and Dr. Soraya Rodriguez Rojo from the High Pressure Processes Group and it has the mention of International PhD because of his secondment in the Department of Experimental Thermodynamics in Ruhr-University of Bochum, under the […]

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Multistage Pilot Plant for the extraction of hemicellulose with subcritical water

Hemicellulose is a natural polymer, made up of several sugars. It can be used to replace oil in many applications, like: production of biofuels; production of films for packaging; production of gels for drug delivery; production of xylitol, compound of great interest in the medical field; production of furfural, which is used in the production […]

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[Paper]: Microwave-assisted extraction of polyphenols from Clinacanthus nutans Lindau medicinal plant: Energy perspective and kinetics modelling

Microwave-assisted extraction (MAE) of polyphenols from medicinal plant, Clinacanthus nutans (C.nutans) was developed. Affecting parameters on the extraction yield of polyphenols such as ethanol concentration, solvent-to-feed ratio (S/F) and energy absorbed were studied. The variations in the effect of ethanol concentration and S/F were also explained in view of energy absorption. Polyphenols yield was found […]

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[Award]: Microwave Working Party 3rd award to “Yield vs selectivity in grape pomace polyphenol microwave extraction”

Our PhD student Ana Álvarez was awarded third place in the scholarship competition at the Third Global Congress on Microwave Energy Application, hold in Cartagena (Spain) in July 2016. This prize was sponsored by the Microwave Working Group. A guild dedicated to formulate the path for microwave technology over the next decade. One of its […]

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Study of hemicelluloses composition of different tree species, extraction using subcritical water with a batch cascade reactor

Hemicelluloses from 10 different tree species commonly growing in the Castilla y Leon region have been extracted with a batch cascade reactor. Raw materials came from tree branches, cut during the seasonal pruning. The aim was to correlate the yield of hemicellulose achieved through the extractions, with the total composition and the structure of the […]

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