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Browsing by Subject "Hydrolysis"

Now showing items 1-20 of 26

A comparative study on Poly(ε-caprolactone) film degradation at extreme pH values

Sailema-Palate, G. Patricia; Vidaurre Garayo, Ana Jesús; Campillo Fernández, Alberto José; Castilla Cortázar, María Isabel Cecilia (Elsevier, 2016-08)

The present paper studies the effect of pH on hydrolytic degradation of Poly(ε-aprolactone) (PCL) Degradation of the films was performed at 37 C in 2.5 M NaOH solution (pH 13) and 2.5 M HCl solution (pH 1). Weight ...
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 ...
An Instantaneous and Highly Selective Chromofluorogenic Chemodosimeter for Fluoride Anion Detection in Pure Water

EL SAYED SHIHATA NASR, SAMEH; Agostini, Alessandro; Santos Figueroa, Luis E.; Martínez Mañez, Ramón; Sancenón Galarza, Félix (Wiley Open Access, 2013-04-03)

The fast and the fluoride: A pyridine derivative functionalized with tert-butyldimethylsilyl ether has been synthesized and used as a selective chromofluorogenic fluoride sensor in water/cetyltrimethylammonium bromide ...
Analysis of Natural Dyes in Historical Islamic Paper using Raman Spectroscopy

Moreno Castaño, Sara (Universitat Politècnica de València, 2022-09-06)

[ES] En la época medieval islámica, los escribas y calígrafos mostraron un especial interés por el papel con color. En museos y galerías de todo el mundo se conservan muchos ejemplos e ilustraciones extraordinarias de sus ...
Aprovechamiento de los subproductos del jamón como fuente de péptidos antioxidantes

Salom Vendrell, Marta Oreto (Universitat Politècnica de València, 2016-09-08)

[ES] La industria cárnica produce toneladas de residuos y subproductos que representan un coste anual muy alto para el sector, además de tratarse de un problema ambiental muy importante. En este sentido, tras el loncheado ...
Azo dyes functionalized with alkoxysilyl ethers as chemodosimeters for the chromogenic detection of the fluoride anion

Agostini, Alessandro; Milani, Michele; Martínez Mañez, Ramón; Licchelli, Maurizio; Soto Camino, Juan; Sancenón Galarza, Félix (Wiley-VCH Verlag, 2012-09)

Finding fluoride: An azo dye functionalized with tert-butyldimethylsilyl ether has been synthesized and used as a selective chromogenic fluoride sensor in the acetonitrile/water mixtures. The chromogenic response arises ...
Characterization of Crosslinked Poly(vinyl alcohol)-Based Membranes with Different Hydrolysis Degrees for Their Use as Electrolytes in Direct Methanol Fuel Cells

Martinez-Felipe, Alfonso; Moliner Estopiñán, Cristina Elia; Imrie, Corrie Thomas; Ribes Greus, María Desamparados (Wiley, 2012-04-15)

The effect of the degree of hydrolysis of poly(vinyl alcohol) (PVA) substrates on the preparation and properties of crosslinked membranes prepared via esterification with sulfosuccinic acid (SSA) has been studied using ...
Chronopotentiometric study of the transport of phosphoric acid anions through an anion-exchange membrane under different pH values

Gally, C.; García Gabaldón, Montserrat; Ortega Navarro, Emma María; Bernardes, A.M.; Pérez-Herranz, Valentín (Elsevier, 2020-05-01)

[EN] Phosphate is the main cause of eutrophication in many water bodies. Its presence in waters is associated to the fact that is not completely removed in conventional wastewater treatment plants. On the other side, ...
Design, Synthesis and Evaluation of Chromo-fluorogenic Probes for Contaminating Species

Barba Bon, Andrea (Universitat Politècnica de València, 2015-03-31)

The present PhD thesis entitled “Design, Synthesis and Evaluation of Chromofluorogenic Probes for Contaminating Species” is focused on the development of new chromo-fluorogenic sensors based on the principles of molecular ...
Diseño y cálculo de biodigestores metálicos atornillados en planta de producción de biogas en Ibiza (Baleares)

Sarabia Senabre, Víctor (Universitat Politècnica de València, 2020-10-07)

[ES] Durante los últimos años la generación de residuos se ha elevado considerablemente debido al crecimiento poblacional de las ciudades, este es uno de los puntos por los que la sociedad a grandes rasgos ha ido ...
Effect of the dissolution time into an acid hydrolytic solvent to taylor electrospun nanofibrous polycaprolactone scaffolds

Gil-Castell, O.; Badia, J.D.; Strömberg, E.; Karlsson, S.; Ribes-Greus, A. (Elsevier, 2017-02)

[EN] The hydrolysis of the polycaprolactone (PCL) as a function of the dissolution time in a formic/acetic acid mixture was considered as a method for tailoring the morphology of nanofibrous PCL scaffolds. Hence the aim ...
Estudio de la síntesis de polienaminonas y su impacto ambiental en términos de biodegradabilidad acuática, con su evaluación del ciclo de vida y gestión de residuos

Segarra Durán, Pablo (Universitat Politècnica de València, 2020-10-13)

[EN] The aim of the work was to study the synthesis of polyenaminones, polymers that are insoluble in water but with the ability to be chemically recycled. After overview of various pathways of synthesis, their environmental ...
Evaluation of the acid pretreatment of agroindustrial waste assisted by high-intensity ultrasound for further bioethanol production

Carregari Polachini, Tiago (Universitat Politècnica de València, 2019-10-21)

[ES] El pre-tratamiento de los residuos de la agroindustria es una de las etapas más complejas del proceso de conversión de biomasa en bioetanol. Esta etapa consiste basicamente en aplicar tratamientos físicos o químicos ...
Functionalized inorganic nanoparticles used as labels in solid-phase immunoassays

Cháfer Pericás, María Consuelo; Maquieira Catala, Ángel; Puchades, Rosa (Elsevier, 2012-01)

[EN] In recent years, research has focused on the development of different types of inorganic nanoparticles (NPs) to be used as labels in immunoassays instead of fluorophores or organic particles. Basically, inorganic NPs ...
Hydrolysis of corn cobs lignocellulosic residue from pentose preparation

Primo Yufera, Eduardo; Gil-Tortosa, Inés; García-Breijo, Francisco-José (Elsevier, 1995)

[EN] The use of agricultural wastes for energy and intermediary chemicals has economic, ecological and strategic interest. The strong hydrolysis of the lignocellulose residue remaining after mild hydrolysis of pentosans ...
Hydrolysis of DCNP (a Tabun mimic) catalyzed by mesoporous silica nanoparticles

Candel Busquets, Inmaculada; Marcos Martínez, María Dolores; Martínez-Máñez, Ramón; Sancenón Galarza, Félix; Costero, Ana M.; Parra Álvarez, Margarita; GIL GRAU, SALVADOR; Guillem, Carmen; Pérez, Francisco; Amoros del Toro, Pedro Jose (Elsevier, 2015-11-15)

[EN] The hydrolysis of diethylcyanophosphonate, DCNP (a Tabun simulant) in the presence of mesoporous silica nanoparticles (MSN) has been studied in acetonitrile:water (99.5:0.5 v/v) mixtures using 31P NMR as a suitable ...
Hydrolytic and enzymatic degradation of a poly(å-caprolactone) network

Castilla Cortázar, María Isabel Cecilia; Más Estellés, Jorge; Meseguer Dueñas, José María; Escobar Ivirico, Jorge Luis; Marí Soucase, Bernabé; Vidaurre, Ana (Elsevier, 2012-08)

Long-term hydrolytic and enzymatic degradation profiles of poly(å-caprolactone) (PCL) networks were obtained. The hydrolytic degradation studies were performed in water and phosphate buffer solution (PBS) for 65 weeks. In ...
Influence of high-intensity ultrasound application on the kinetics of sugar release from acid suspensions of artichoke (Cynara scolymus) biomass

Carregari-Polachini, Tiago; Mulet Pons, Antonio; Telis Romero, Javier; Carcel, Juan A. (Elsevier, 2019-11)

[EN] The study of sugar release kinetics is an essential step prior to developing new technologies for applying in the bioethanol industry. To this end, the kinetics of reducing and total sugar release (extraction/hydrolysis) ...
Metabolic shift of polyphosphate-accumulating organisms with different levels of polyphosphate storage

Acevedo, B.; Oehmen, A.; Carvalho, G.; Seco, A.; Borras, L.; Barat Baviera, Ramón (Elsevier, 2012)

Previous studies have shown that polyphosphate-accumulating organisms (PAOs) are able to behave as glycogen-accumulating organisms (GAOs) under different conditions. In this study we investigated the behavior of a culture ...
Native vs photoinduced chemiluminescence in dimethoate determination

Catalá Icardo, Mónica; López Paz, José Luis; Choves Barón, Cristina; Pena Badena, A. (ELSEVIER SCIENCE BV, 2012)

The determination of dimethoate using either its native chemiluminescent (CL) properties or its photoinduced chemiluminescence obtained by irradiation with a 15W low-pressure mercury lamp was studied. Thereby, two flow ...