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Listar por autor "Vieira de Freitas, Pedro Augusto"

Mostrando ítems 1-20 de 27

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Absorbentes celulósicos obtenidos de la paja de arroz. Influencia del proceso de separación de la celulosa

Molinero Fernández, María (Universitat Politècnica de València, 2022-11-21)

[ES] La paja de arroz es un residuo agroalimentario cuya revalorización es necesaria para reducir su impacto ambiental y aprovechar su potencial composicional en el marco de la economía circular. En este trabajo se han ...
Active aqueous extracts from rice straw to improve the preservation capacity of PLA in pork meat

Bas Gil, Nuria Julia (Universitat Politècnica de València, 2022-11-02)

[EN] Rice straw is an agro-industrial lignocellulosic residue produced worldwide in large quantities, highly rich in phenolic compounds with bioactive properties. In this study, aqueous extracts of this residue have been ...
Active Poly (Lactic Acid) Films with Rice Straw Aqueous Extracts for Meat Preservation Purposes

Vieira-De Freitas, Pedro Augusto; González Martínez, María Consuelo; Chiralt, A. (Springer-Verlag, 2023-11)

[EN] Aqueous extracts from rice straw (RS), using ultrasound-assisted reflux heating extraction (USHT) and subcritical water extraction (SWE), under two process conditions (160 degrees C, 7 bars; and 180 degrees C, 11 ...
Aerogeles de celulosa de la paja de arroz combinada con almidón

Alonso Collado, Paula (Universitat Politècnica de València, 2024-07-17)

[ES] La paja de arroz es un residuo agroalimentario que contiene compuestos de gran interés como la celulosa, y cuya revalorización es fundamental en el marco de la economía circular. En el presente trabajo se ha obtenido ...
Antioxidant and antimicrobial extracts from grape stalks obtained with subcritical water. Potential use in active food packaging development

Vieira-De Freitas, Pedro Augusto; Meyer, Silvia; Hernandez-Garcia, Eva; Rebaque, Diego; Vilaplana, Francisco; Chiralt, Amparo (Elsevier, 2024-09-01)

[EN] In order to valorise winemaking grape stalks, subcritical water extraction at 160 and 180 degrees C has been carried out to obtain phenolic-rich extracts useful for developing active food packaging materials. Red (R) ...
Antioxidant poly (lactic acid) films with rice straw extract for food packaging applications

Vieira-De Freitas, Pedro Augusto; Bas Gil, Nuria Julia; González Martínez, María Consuelo; Chiralt, A. (Elsevier, 2022-12)

[EN] Antioxidant PLA films incorporating 2%, 4% and 6% of phenol-rich extract from rice straw (RS) were obtained by melt blending and compression-moulding. Aqueous RS extract was obtained by a combined ultrasound-reflux ...
Antioxidant starch composite films containing rice straw extract and cellulose fibres

Vieira-De Freitas, Pedro Augusto; González Martínez, María Consuelo; Chiralt, A. (Elsevier, 2022-09)

[EN] Antioxidant aqueous rice straw (RS) extract was obtained by a combined ultrasound-reflux heating process and cellulose fibres (CF) were purified by bleaching the extraction residue. Both fractions were incorporated ...
Aplicación de la extracción con agua subcrítica para la valoración del orujo de vinificación

Sáez Montesinos, Ana María (Universitat Politècnica de València, 2024-03-28)

[ES] En el contexto actual, la industria alimentaria emerge como el sector manufacturero predominante en la Unión Europea, contribuyendo con el 14,3% de los ingresos totales. España, con su extensa superficie de viñedos, ...
Aplicación de ultrasonidos y extracción subcrítica para la obtención de extractos acuosos activos de la paja de arroz

Ivars Medina, Laura (Universitat Politècnica de València, 2023-10-17)

[ES] La paja de arroz es un residuo agroalimentario muy abundante y su gestión resulta muy problemática. Sin embargo, este subproducto contiene compuestos de gran interés que pueden obtenerse para su revalorización en el ...
Application of Ultrasound Pre-Treatment for Enhancing Extraction of Bioactive Compounds from Rice Straw

Vieira-De Freitas, Pedro Augusto; González Martínez, María Consuelo; Chiralt Boix, Mª Amparo (MDPI AG, 2020-11)

[EN] The extraction of water-soluble bioactive compounds using different green methods is an eco-friendly alternative for valorizing agricultural wastes such as rice straw (RS). In this study, aqueous extracts of RS ...
Applying ultrasound-assisted processing to obtain cellulose fibres from rice straw to be used as reinforcing agents

Vieira-De Freitas, Pedro Augusto; González Martínez, María Consuelo; Chiralt, A. (Elsevier, 2022-03)

[EN] Rice straw (RS) is one of the most globally abundant agro-industrial residues. For its valorisation, a green combined ultrasound-reflux heating method was applied to obtain cellulose fibres (CF) from RS. The new method ...
Atomization of Microfibrillated Cellulose and Its Incorporation into Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by Reactive Extrusion

Vieira-De Freitas, Pedro Augusto; Barrasa, Hector; Vargas, Fátima; Rivera, Daniel; Vargas, Maria; Torres-Giner, S. (MDPI AG, 2022-02)

[EN] The present study focuses on the preparation and characterization of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films that were reinforced with cellulose microstructures to obtain new green composite materials ...
Bolsas monodosis de almidón con extracto activo y microfibras celulósicas de paja de arroz para la conservación de aceite de girasol

Valera Manzanares, Julián (Universitat Politècnica de València, 2022-10-21)

[EN]The ability of different starch-based biodegradable materials to prevent sunflower oil oxidation by pacaking in single-dose bags has been studied. The materials were obtained with corn starch and glycerol as plasticiser ...
Compostabilidad de films laminados almidón-PLA con fibras de celulosa y compuestos activos de la paja de arroz

Andrés Villota, Rubén (Universitat Politècnica de València, 2023-09-07)

[ES] Se han obtenido films laminados con almidón de maíz y ácido poliláctico (PLA) con y sin fibras de celulosa (en la capa de almidón) y extracto activo (en la capa de PLA), obtenidos de la paja de arroz. Según estudios ...
Exploring Antimicrobial Hydroxypropyl-ß-Cyclodextrin Inclusion Complexes for Cheese Preservation: A Combined Theoretical and Experimental Study

Silva, Rafael Resende Assis; Marques, Clara Suprani; Mendes, Luiza Alves; Vieira-De Freitas, Pedro Augusto; de Oliveira, Taila Veloso; Pinto, Luciana Matos Alves; Jaime, Carlos; Soares, Nilda de Fatima Ferreira (Springer-Verlag, 2024-05)

[EN] Cyclodextrin enhances the activity of bioactive compounds through the formation of inclusion complexes (ICs), but its effect on diverse compound structures and processing methods is poorly understood. Here, our goal ...
Extracción de antioxidantes de la paja de arroz. Aplicación de ultrasonidos con tratamiento térmico

Jordá Tomás, Paula (Universitat Politècnica de València, 2020-07-30)

[ES] La paja de arroz es un residuo agroalimentario abundante y difícil de gestionar, cuya revalorización debe ser potenciada en el contexto de la economía circular generando productos de alto valor que compensen la ...
Fraud-proof methylcellulose-based fish freshness indicator: Reversibility in halochromic sensing of basic volatiles is tailored by ionic strength

Silva, R.R.A.; Vieira-De Freitas, Pedro Augusto; de Oliveira, Taila Veloso; Teixeira, S.C.; Rigolon, T.C.B.; Stringheta, P.C.; Otoni, C.G.; Soares, N. de F.F. (Elsevier, 2024-10)

[EN] Food from animal sources (e.g., fish) represents the food group most likely to disseminate diseases to humans. To prevent food contamination and foodborne illnesses, intelligent packaging has been developed to monitor ...
Influence of the cellulose purification process on the properties of aerogels obtained from rice straw

Vieira-De Freitas, Pedro Augusto; González Martínez, María Consuelo; Chiralt, A. (Elsevier, 2023-07-15)

[EN] Cellulose aerogels were obtained from purified rice straw cellulose fibres (CF) by applying different extraction methods: the conventional alkaline treatment (ALK) and alternative aqueous extraction based on the ...
Migración de hidroximetilfurfural (HMF) en films biodegradables con extractos activos obtenidos por extracción en agua subcrítica.

Serrano Huesca, Esperanza (Universitat Politècnica de València, 2024-10-04)

[ES] La creciente preocupación por la contaminación ambiental causada por los residuos plásticos ha llevado a la búsqueda de alternativas sostenibles como los bioplásticos biodegradables. Polímeros como el PHBV y el PLA ...
Multilayer Sheets Based on Double Coatings of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) on Paper Substrate for Sustainable Food Packaging Applications

Hernandez-Garcia, Eva; Vieira-De Freitas, Pedro Augusto; Zomeño, Pedro; González Martínez, María Consuelo; Torres-Giner, Sergio (MDPI AG, 2023-01)

[EN] This work reports on the development and performance evaluation of newly developed paper sheets coated, on both sides, with thin films of biodegradable poly(3-hydroxybutyrate-co-3- hydroxyvalerate) (PHBV) for applications ...