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Browsing by Subject "Degradation"

Now showing items 1-20 of 82

A modeling framework for predicting the effect of the operating conditions and component sizing on fuel cell degradation and performance for automotive applications

Desantes J.M.; Novella Rosa, Ricardo; Pla Moreno, Benjamín; López-Juárez, Marcos (Elsevier, 2022-07-01)

[EN] In this study, durability and performance prediction were integrated in the sizing process of the FC stack of a fuel cell range-extender (FCREx) vehicle together with the design of a dynamics-limited control strategy. ...
A statistical design of experiments for optimizing the MALDI-TOF-MS sample preparation of polymers. An application in the assessment of the thermo-mechanical degradation mechanisms of poly (ethylene terephthalate)

Badía Valiente, José David; Strömberg, Emma Marie; Ribes Greus, María Desamparados; Karlsson, Sigbritt (ELSEVIER SCIENCE BV, 2011)

[EN] The sample preparation procedure for MALDI-TOF MS of polymers is addressed in this study by the application of a statistical Design of Experiments (DoE). Industrial poly (ethylene terephthalate) (PET) was chosen as ...
Analysis of Hydrogen Fuel Cell Powerplant Architectures for Future Transport Applications

López Juárez, Marcos (Universitat Politècnica de València, 2022-11-07)

[ES] A la luz de la crisis medioambiental y del creciente interés en el uso del H2 para avanzar hacia la Economía del Hidrógeno, esta tesis tiene como objetivo analizar y optimizar nuevas arquitecturas de sistemas propulsivos ...
Analytical strategies for the quality assessment of recycled high-impact polystyrene (HIPS)

Vilaplana Domingo, Francisco Javier (Universitat Politècnica de València, 2008-05-30)

Polymers are subjected to physical and chemical changes during their processing, service life, and further recovery, and they may also interact with impurities that can alter their composition. These changes substantially ...
Análisis de híbridos de polímero-óxido de grafeno para aplicaciones en liberación de fármacos

Sánchez González, Rosa María (Universitat Politècnica de València, 2021-02-01)

[ES] Este Trabajo de Fin de Máster consiste en la elaboración de un proyecto cuyo objetivo es la síntesis y caracterización de un material compuesto biodegradable formado por policaprolactona (PCL) / óxido de grafeno (GO) ...
Análisis de la estabilidad al deslizamiento de presas de hormigón mediante modelos numéricos de cálculo avanzados. Aplicación a una presa en la provincia de Sevilla

Cervera Miquel, Daniel (Universitat Politècnica de València, 2017-10-26)

[EN] Risk analysis applied to dam safety consist in a set of methodologies that requires to estimate the probability of the solicitation events as well as the conditional probability of the dam-reservoir system response ...
Assessing the MALDI-TOF MS sample preparation procedure to analyze the influence of thermo-oxidative ageing and thermo-mechanical degradation on poly (Lactide)

Badia, J.D.; Strömberg, Emma Marie; Ribes Greus, María Desamparados; Karlsson, Sigbritt (Elsevier, 2011)

[EN] Multiple processing by means of successive injection cycles was used to simulate the thermo-mechanical degradation effects on the oligomeric distribution of PLA under mechanical recycling. Likewise, an accelerated ...
Characterization of historical coating mortars of La Ceramo factory in Valencia

Sutti, Marcela Luana; Aguiar, Maiara Oliveira Silva de; Fioriti, Cesar Fabiano; Christófani, Maria Paula Hêngling (Universitat Politècnica de València, 2019-06-18)

[EN] The objective of this paper was to characterize historical coating mortars taken from the La Ceramo factory, in Valencia, by means of historical, in situ and sample collection at various points in the building, for ...
Characterization of the curing process of vinyl plastisols with epoxidized linseed oil as a natural-based plasticizer

Fenollar Gimeno, Octavio Ángel; García Sanoguera, David; Sánchez Nacher, Lourdes; López Martínez, Juan; Balart Gimeno, Rafael Antonio (Wiley-Blackwell, 2012-05-05)

In this work, we have evaluated the curing process of a natural-based plasticizer, epoxidized linseed oil, as a possible alternative to phthalate substitution for polyvinyl chloride. Several curing times ranging from 6 to ...
Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: role of Cl2(center dot-) radical

Caregnato, Paula; Rosso, Janina A.; Soler Escoda, Juan Miguel; Arques Sanz, Antonio; Martire, Daniel O.; González, Mónica C. (ElsevierIWA Publishing, 2013-01-01)

The reaction of phosphor-containing pesticides such as methidathion (MT) and dimethoate (DM) with dichloride radical anions (Cl-2(center dot-)) was investigated. The second order rate constants (1.3 +/- 0.4) x 10(8) and ...
Conservación preventiva para alargar la vida de monocromos y tintas planas

García Garrote, Ana (Universitat Politècnica de València, 2017-08-28)

Actually the monochrome paints and flat inks conservation is one of the main problems. These delicate surfaces are affected by intrinsic and extrinsic factors. Knowing the composition of the different contexts and their ...
Contribution to the study of thermal, biological and photo degradation of polylactide

Santonja Blasco, Laura (Universitat Politècnica de València, 2012-07-09)

El propósito de la presente tesis doctoral es estudiar el efecto de la degradación térmica, biológica y fotolítica en la polilactida (PLA) para contribuir a la caracterización de este polímero biodegradable bajo diferentes ...
Degradation and thermal analysis of polymers

Ribes Greus, María Desamparados; Gil Castell, Óscar (Universitat Politècnica de València, 2020-06-17)

Degradation gives, as a result, the loss of the physicochemical properties of a given polymer material. The thermal analysis raises as an adequate tool for analysing and determining the results of polymer degradation, ...
Degradation of dietary oligofructose and inulin in the gastro-intestinal tract of the rabbit and the effects on caecal pH and volatile fatty acids

Maertens, L.; Aerts, J.M.; De Boever, J. (World Rabbit Science. ICTA. UPV, 2004)

[EN] Three experimental fattening diets were each fed ad libitum to 12 animals of 8-9 weeks of age (initial weight 2,257 ± 87 g). The diets contained 0% (Control), 2% oligofructose (OF) (Raftifeed(R) OPS) or 2% inulin ...
Degradation of Methylparaben Using Optimal WO3 Nanostructures: Influence of the Annealing Conditions and Complexing Agent

Cifre-Herrando, Mireia; Roselló-Márquez, Gemma; García-García, D.M.; Garcia-Anton, Jose (MDPI AG, 2022-12)

[EN] In this work, WO3 nanostructures were synthesized with different complexing agents (0.05 M H2O2 and 0.1 M citric acid) and annealing conditions (400 degrees C, 500 degrees C and 600 degrees C) to obtain optimal WO3 ...
Depuración de aguas contaminadas con plaguicidas empleados en cultivos de caña de azúcar en Colombia

García Ortiz, Jorge (Universitat Politècnica de València, 2014-02-17)

[ES] Este proyecto tiene como objetivo general el estudio de la mejora en la calidad del agua en zonas agrícolas de Colombia, especialmente en zonas donde se cultiva la caña de azúcar como principal fuente de riqueza de ...
Determination of oxygenated compounds in secondary organic aerosol from isoprene and toluene smog chamber experiments

Borrás García, Esther Mª; Tortajada-Genaro, Luis Antonio (Taylor & Francis, 2012)

[EN] The determination of multifunctional oxygenated compounds in secondary organic aerosols (SOA) usually requires a derivatisation protocol prior to gas chromatography-mass spectrometry analysis (GC-MS). Our proposed ...
Development and characterization of unmodified kaolinite/EVOH nanocomposites by melt compounding

Cabedo Mas, Luis; Villanueva Redon, María Pilar; Lagaron Cabello, José María; Giménez Torres, Enrique (Elsevier, 2017)

[EN] Nanocomposites of unmodified kaolinite (Kaol)/ethylene-vinyl alcohol copolymer (EVOH) with different Kaol contents have been obtained by a two-step process: melt blending in an internal mixer and film processing by ...
Development of a hydrogen fuel cell performance degradation predictive model for road transport applications

García Rodríguez, Joaquín (Universitat Politècnica de València, 2023-02-20)

[ES] En el marco de la actual transición energética hacia la descarbonización del sector de la movilidad, este estudio se centra en el desarrollo de un modelo predictivo de la degradación de la pila de hidrogeno PEM. ...
Dynamic signal processing by ribozyme-mediated RNA circuits to control gene expression

Shen, Shensi; Rodrigo Tarrega, Guillermo; Prakash, Satya; Majer, Eszter; Landrain, T.E.; Kirov, Boris; Daros Arnau, Jose Antonio; Jaramillo, Alfonso (Oxford University Press (OUP), 2015-05-26)

[EN] Organisms have different circuitries that allow converting signal molecule levels to changes in gene expression. An important challenge in synthetic biology involves the de novo design of RNA modules enabling dynamic ...