2024-03-28T12:16:33Zhttps://riull.ull.es/oai/requestoai:riull.ull.es:915/45352023-02-03T06:04:58Zcom_915_449com_915_433col_915_4394
Sans, J.A.
Vilaplana, R.
Errandonea, D.
Cuenca-Gotor, V.P.
García-Domene, B.
Popescu, C.
Manjón, F.J.
Singhal, A.
Achary, S.N.
Martínez-García, D.
Pellicer-Porres, J.
Rodríguez-Hernández, P.
Muñoz, A.
2017-05-03T07:27:09Z
2017-05-03T07:27:09Z
2017
28 (2017)
http://riull.ull.es/xmlui/handle/915/4535
This work reports the structural and vibrational properties of nanocrystals of corundum-type In2O3 (rh-In2O3) at high pressures by using angle-dispersive x-ray diffraction and Raman scattering measurements up to 30 GPa. The equation of state and the pressure dependence of the Raman-active modes of the corundum phase in nanocrystals are in good agreement with previous studies on bulk material and compare nicely with theoretical simulations on bulk rh-In2O3. Nanocrystalline rh-In2O3 showed stability under compression at least up to 20 GPa, unlike bulk rh-In2O3 which gradually transforms to the orthorhombic Pbca (Rh2O3-III-type) structure above 12-14 GPa. The different stability range found in nanocrystalline and bulk In2O3 is discussed.
en
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Nanocristales
Difracción de rayos X
Espectroscopia
Alta presión
Structural and Vibrational Properties of Corundum-type In2O3 Nanocrystals under Compression
info:eu-repo/semantics/article
oai:riull.ull.es:915/160112023-02-03T10:26:46Zcom_915_449com_915_433col_915_16010
Pérez, Sixto J.
Purino, Martín A.
Cruz, Daniel A.
López-Soria, Juan M.
Carballo, Rubén M.
Ramírez, Miguel A.
Fernández, Israel
Martín García, Víctor Sotero
Padrón, Juan I.
2019-09-04T10:36:31Z
2019-09-04T10:36:31Z
2016
http://riull.ull.es/xmlui/handle/915/16011
A highly efficient diastereoselective iron(III)-catalyzed intramolecular hydroamination/cyclization reaction involving - substituted amino alkenes is described. Thus, enantiopure trans-2,5- disubstituted pyrrolidines and trans-5-substituted proline derivatives are synthesized by means of the combination of enantiopure starting materials, easily available from L--amino acids, with sustainable metal catalysts such as iron(III) salts. The scope of this methodology is highlighted in an enantiodivergent approach to the synthesis of both (+)- and (-)-pyrrolidine 197B alkaloids from L-glutamic acid. In addition, a computational study was also carried out to gain insight into the complete diastereoselectivity of the transformation.
en
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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Enantiodivergent Synthesis of (+)- and (-)-Pyrrolidine 197B. Synthesis of trans-2,5-Disubstituted Pyrrolidines via Intramolecular Hydroamination
info:eu-repo/semantics/article
oai:riull.ull.es:915/213002023-02-03T10:27:53Zcom_915_449com_915_433col_915_16010
Maiti, Binoy
Abramov, Alex
Finn, M. G.
Díaz Díaz, David
2020-09-24T12:23:50Z
2020-09-24T12:23:50Z
2020
http://riull.ull.es/xmlui/handle/915/21300
10.1002/app.49783
We describe the use of biopolymers, such as sodium alginate, as an sustainable
adhesive binder for several metals and high-density polyethylene. A standard
pull test and peel test was performed with disks, made of different material
and size. Adhesive failure was investigated by varying the amount of applied
alginate solution, drying time, drying temperature, effect of surface area, and
the nature of the adherend. Alginate adhesion was remarkably strong, relatively
general, and sensitive to the presence of water. A brief comparison with
other biopolymers is also provided.
en
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Biopolymers as sustainable metal bio-adhesives
info:eu-repo/semantics/article
oai:riull.ull.es:915/213022023-02-03T10:28:06Zcom_915_449com_915_433col_915_16010
Tautz, Markus
Kuchenbrod, Maren T.
Hertkorn, Joachim
Weinberger, Robert
Welzel, Martin
Pfitzner, Arno
Díaz Díaz, David
2020-09-25T08:53:02Z
2020-09-25T08:53:02Z
2020
http://riull.ull.es/xmlui/handle/915/21302
10.3762/bjnano.11.4
Roughening by anisotropic etching of N-face gallium nitride is the key aspect in today’s production of blue and white light emitting
diodes (LEDs). Both surface area and number of surface angles are increased, facilitating light outcoupling from the LED chip.
The structure of a GaN layer stack grown by metal organic chemical vapour deposition (MOCVD) was varied in the unintentionally
doped u-GaN bulk region. Different sequences of 2D and 3D grown layers led to a variation in dislocation density, which was
monitored by photoluminescence microscopy (PLM) and X-ray diffraction (XRD). Thin-film processing including laser lift off
(LLO) was applied. The influence of epitaxial changes on the N-face etch kinetics was determined in aqueous KOH solution at
elevated temperature. Inductively-coupled plasma optical emission spectroscopy (ICP-OES) was used to measure the etch progress
in small time increments with high precision. Thereby, the disadvantages of other techniques such as determination of weight loss
or height difference were overcome, achieving high accuracy and reproducibility.
en
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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Influence of the epitaxial composition on N-face GaN KOH etch kinetics determined by ICP-OES
info:eu-repo/semantics/article
oai:riull.ull.es:915/214842023-02-03T10:28:10Zcom_915_449com_915_433col_915_16010
Alegre-Requena, Juan V.
Grijalvo, Santiago
Sampedro, Diego
Mayr, Judith
Sald´ıas, César
Marrero Tellado, José Juan
Eritja, Ram´on
Herrera, Raquel P.
Díaz Díaz, David
2020-10-01T12:37:17Z
2020-10-01T12:37:17Z
2020
http://riull.ull.es/xmlui/handle/915/21484
10.1039/d0ra00943a
(S)-2-Stearamidopentanedioic acid (C18-Glu) is a known LMW gelator that forms supramolecular gels in
a variety of solvents. In this work, we have carried out the isosteric substitution of the amide group by
a sulfonamide moiety yielding the new isosteric gelator (S)-2-(octadecylsulfonamido)pentanedioic acid
(Sulfo-Glu). The gelation ability and the key properties of the corresponding gels were compared in
terms of gelation concentration, gel-to-sol transition temperature, mechanical properties, morphology,
and gelation kinetics in several organic solvents and water. This comparison was also extended to (S)-2-
(4-hexadecyl-1H-1,2,3-triazol-4-yl)pentanedioic acid (Click-Glu), which also constitutes an isostere of
C18-Glu. The stabilizing interactions were explored through computational calculations. In general,
Sulfo-Glu enabled the formation of non-toxic gels at lower concentrations, faster, and with higher
thermal-mechanical stabilities than those obtained with the other isosteres in most solvents.
Furthermore, the amide-sulfonamide isosteric substitution also influenced the morphology of the gel
networks as well as the release rate of an embedded antibiotic (vancomycin) leading to antibacterial
activity in vitro against Staphylococcus aureus.
en
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Sulfonamide as amide isostere for fine-tuning the gelation properties of physical gels
info:eu-repo/semantics/article
oai:riull.ull.es:915/39522023-02-03T10:29:51Zcom_915_449com_915_433col_915_10711
Plaza Picón, Francisca del Mar
2017-02-05T11:15:05Z
2017-02-05T11:15:05Z
2015
APA
1130-3611
http://riull.ull.es/xmlui/handle/915/3952
En el presente trabajo analizamos el modo en el que diversos mitos, en su mayoría, de estructura triádica, propios del universo mitológico griego relativo al Averno, tras su asimilación y transmisión por la literatura latina, se reinterpretan en la literatura medieval. Asimismo, estableceremos las diferentes funciones, según las intenciones de los distintos autores, con las que se reescriben en algunos textos franceses, sobre todo de carácter didáctico o moral, en los que el mito del Averno, cristianizado por los exégetas medievales, con sus imágenes y símbolos se convierte en elemento indispensable para la configuración y consolidación del imaginario del infierno, al que se recurre como instrumento de sumisión y de persuasión coercitiva de los fieles.
In this paper we analyse the ways in which a variety of myths belonging to the Greek mythological universe of the Averno, most of them exhibiting triadic structures, have been reinterpreted in the Medieval Literature after their assimilation and dissemination through the Latin Literature. In addition, we establish the different functions, according to the intentions of the different authors, whereby such myths were re-written in some Medieval French texts, especially of didactic or moral character, in which the myth of the Averno was christianised by incorporating images and symbols used by the Medieval interpreters. These reinterpretations became essential in the configuration and consolidation of the imagery of Hell as an instrument for coercive persuasion and submission of believers.
es
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es_ES
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 Internacional)
Del Averno al Infierno medieval. Reescrituras de un mito.
info:eu-repo/semantics/article
oai:riull.ull.es:915/7712023-02-03T15:48:58Zcom_915_449com_915_433col_915_755
Cruz Modino, Raquel de la
Santana Talavera, Agustín
2015-04-17T09:27:58Z
2015-04-17T09:27:58Z
2008
978-84-691-4961-4
http://riull.ull.es/xmlui/handle/915/771
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES
ECONOMIA SECTORIAL: TURISMO
Turismo
El turismo de buceo en La Restinga (Islas Canarias) y L’Estartit (Cataluña): AMPs, clasificaciones e impactos
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/213272023-02-03T10:30:14Zcom_915_449com_915_433col_915_16010
Abramov, Alex
Reiser, Oliver
Díaz Díaz, David
2020-09-28T11:25:23Z
2020-09-28T11:25:23Z
2020
http://riull.ull.es/xmlui/handle/915/21327
10.1002/open.202000092
The outcome of photosensitized [2+2]-cycloaddition reactions
of various cinnamates has been compared in different reaction
media, including homogeneous organic solutions under inert
conditions, degassed water, and aerated physical gels. The
reactions were performed under LED blue light (λmax=455 nm)
irradiation and [Ir{dF(CF3)ppy}2(dtb-bpy)]PF6 (1.0 mol%) as photocatalyst.
The processes were optimized taking into consideration
solvent, gelator, and substrate. Comparative kinetics
analyses, as well as the effect of the reaction media on the
diastereoselectivity of the process, were evaluated during this
investigation. In a number of cases, carrying out the reaction in
a less polar solvent, like toluene or highly polar solvent, like
water had a tremendous impact on the diastereoselectivity of
the process, pointing towards an effect on the stabilization of
the putative diradical intermediate in this medium. Moreover,
while for reactions run in homogeneous solution oxygen needs
to be excluded, no erosion in yield is observed when the
photoadditions were run in aerated gel media.
en
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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Effect of Reaction Media on Photosensitized [2+2]- Cycloaddition of Cinnamates
info:eu-repo/semantics/article
oai:riull.ull.es:915/214322023-02-03T10:30:19Zcom_915_449com_915_433col_915_16010
González-Martín, Raúl
Pacheco-Fernández, Idaira
Maiti, Binoy
Ayala, Juan H.
Afonso Perera, Ana María
Díaz Díaz, David
Pino, Verónica
2020-09-30T11:06:52Z
2020-09-30T11:06:52Z
2020
http://riull.ull.es/xmlui/handle/915/21432
10.1016/j.chroma.2020.460910
A pH-sensitive polymer based on the poly(styrene- alt -maleic anhydride) co-polymer serves as basis to develop a microextraction method (pH-HGME) in direct combination with high-performance liquid chromatography (HPLC) and fluorescence detection (FD) for the determination of seven organic com- pounds, including three polycyclic aromatic hydrocarbons (PAHs), three monohydroxylated PAHs and one alkylphenol, in urine. The method bases on the structural modification of the pH-sensitive polymer in the aqueous sample at a high pH value, followed by the formation and insolubilization of a hydrogel contain- ing the preconcentrated analytes by decreasing the pH, and the direct injection of the hydrogel-rich phase in the HPLC-FD system. The optimization of the main variables permitted the selection of low amounts of aqueous sample (10 mL), which was mixed with 10 mg of co-polymer also present in a low volume (150 μL) of concentrated NaOH. The method further requires the addition of 200 μL of concentrated HCl, 3 min of stirring, and 15 min of centrifugation. This pH-HGME-HPLC-FD method presented low limits of detection, ranging from 0.001 μg L −1 to 0.09 μg L −1 in ultrapure water, average relative recoveries of 96.9% for the concentration level of 0.60 μg L −1 , and enrichment factors between 1.50 and 17.7. The pro- posed method also exhibited high precision, with intermediate relative standard deviations lower than 16% for a concentration level of 0.60 μg L −1 . The developed pH-HGME-HPLC-FD method performed ade- quately when analyzing two human urine samples provided by a non-smoker male and a smoker female, respectively. One of the target analytes (2-hydroxynaphthalene) was quantified in both samples using the standard addition method, with a predicted concentration of 7.3 ±0.4 μg L −1 in the non-smoker male urine and 19.3 ±0.6 μg L −1 in the smoker female urine.
en
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Use of a pH-sensitive polymer in a microextraction and preconcentration method directly combined with high-performance liquid chromatography
info:eu-repo/semantics/article
oai:riull.ull.es:915/141482023-02-03T10:30:25Zcom_915_449com_915_433col_915_10711
González Zalacain, Roberto José
2019-05-22T09:22:54Z
2019-05-22T09:22:54Z
2018
1133-598X
http://riull.ull.es/xmlui/handle/915/14148
Las fuentes judiciales han aportado en los últimos tiempos un importante caudal de información en muchas líneas de investigación histórica. En este artículo se analizan las distintas posibilidades que ofrecen este tipo de documentos para el análisis de las fronteras en la Baja Edad Media, más concretamente en las que se refieren al ámbito marítimo.
Recently, judicial records have served as an important source of information for many topics of historical research. This paper discusses the different possibilities offered by these sources for the analysis of frontiers in the Late Middle Ages, and more specifically those referring to maritime borders.
es
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fuentes judiciales
fronteras marítimas
baja Edad Media
La frontera marítima en las fuentes judiciales de la Castilla bajomedieval
info:eu-repo/semantics/article
oai:riull.ull.es:915/7772023-02-03T10:30:52Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
Díaz Rodríguez, Pablo
Rodríguez Darias, Alberto Jonay
2015-04-20T12:05:40Z
2015-04-20T12:05:40Z
2011
SANTANA, Agustin; DÍAZ RODRÍGUEZ, Pablo; RODRÍGUEZ DARIAS, Alberto Jonay. Renovación de destinos y percepción de la protección ambiental. El caso de Fuerteventura (Islas Canarias, España). Investigaciones Turísticas, [S.l.], n. 1, p. 1-20, jul. 2011. ISSN 2174 - 5609. Disponible en: <http://www.investigacionesturisticas.es/iuit/article/view/16>. Fecha de acceso: 20 abr. 2015 doi:http://dx.doi.org/10.14198/INTURI2011.1.01.
2174-5609
http://riull.ull.es/xmlui/handle/915/777
Las estrategias de renovación de destinos maduros son diversas. En el caso de la isla de Fuerteventura, las administraciones locales han emprendido el camino hacia la renovación y singularización a través de la apuesta por la activación de diferentes formas de patrimonio y la modificación de la imagen proyectada, introduciendo ciertos atributos que no habían sido insertados de manera clara en los discursos turísticos hasta el momento. Estos procesos implican dinámicas de resignificación en las que no siempre son tenidas en cuenta las diferentes maneras de pensar el territorio por parte de los pobladores del destino. Este trabajo se centra en la valoración de las propuestas de protección ambiental por parte de los tres grandes grupos de usuarios del territorio en cuestión (población nativa, residentes y turistas), partiendo de la hipótesis de que éstas serán significativamente diferentes como consecuencia de su particular grado de implicación con la isla
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
Research Subject Categories::SOCIAL SCIENCES::Business and economics::Economics
Renovación de destinos y percepción de la protección ambiental: el caso de Fuerteventura (Islas Canarias, España)
info:eu-repo/semantics/article
oai:riull.ull.es:915/7732023-02-03T15:48:58Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
2015-04-17T10:22:10Z
2015-04-17T10:22:10Z
2007
http://riull.ull.es/xmlui/handle/915/773
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES
ECONOMIA SECTORIAL: TURISMO
Turismo
Imaginando la imagen en turismo: un viaje de ida y vuelta
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/7722023-02-03T15:48:58Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
2015-04-17T09:45:39Z
2015-04-17T09:45:39Z
2004
84-95122-57-X
http://riull.ull.es/xmlui/handle/915/772
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES
ECONOMIA SECTORIAL: TURISMO
Turismo
Mirar y leer: autenticidad y patrimonio cultural para el consumo turístico
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/7692023-02-03T15:48:58Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
Bianchi, Raoul V.
2015-04-15T10:10:52Z
2015-04-15T10:10:52Z
2004
90-5356-649-5
http://riull.ull.es/xmlui/handle/915/769
en
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES
Turismo
ECONOMIA SECTORIAL: TURISMO
Between the sea and land: exploring the social organisation of tourism development in a Gran Canaria fishing village
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/7902023-02-03T10:31:34Zcom_915_449com_915_433col_915_755
Cruz Modino, Raquel de la
Vendrell Simón, Begoña
Pascual Fernández, José Jaime
2015-05-04T09:12:52Z
2015-05-04T09:12:52Z
2012
1695-7121
http://riull.ull.es/xmlui/handle/915/790
es
Research Subject Categories::NATURAL SCIENCES::Earth sciences::Atmosphere and hydrosphere sciences::Oceanography
¿Un mar de oportunidades?
info:eu-repo/semantics/article
oai:riull.ull.es:915/7862023-02-03T10:32:54Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
Rodríguez Darias, Alberto Jonay
Díaz Rodríguez, Pablo
Aguilera Ávila, Laura
2015-04-27T08:47:33Z
2015-04-27T08:47:33Z
2010
1889-0326
http://riull.ull.es/xmlui/handle/915/786
La interactividad de internet 2.0 y las conversaciones desarrolladas en el entorno virtual –redes sociales— se ha tomado como representativa de la opinión media de los ciudadanos y turistas (agrupando características sociodemográficas y socioeconómicas muy diversas), con lo que su análisis se convierte en una herramienta válida a explorar. Se considera aquí que la presencia notoria de discursos relativos al patrimonio de destinos determinados, las islas de Tenerife y Fuerteventura en este caso, sirve de indicador del cumplimiento de objetivos en la reorientación turística con base patrimonial. Se analizan en el texto los discursos relativos al patrimonio cultural y natural de Tenerife y Fuerteventura en la red social Facebook. Se desarrolló un análisis cualitativo de los comentarios, fotos y vídeos alojados tratando de determinar cuestiones como la relevancia del patrimonio en la imagen que se comparte a través de este medio sobre turistas potenciales, el tipo de patrimonio que se expone a través de este canal, diferencias entre usuarios en relación con la referencia a elementos patrimoniales en sus discursos
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
ECONOMIA SECTORIAL: TURISMO
Turismo
Research Subject Categories::SOCIAL SCIENCES::Social sciences
Reorientación turística, patrimonio e imagen: un análisis de los discursos en Facebook de Tenerife y Fuerteventura (Islas Canarias, España)
info:eu-repo/semantics/article
oai:riull.ull.es:915/44932023-02-03T10:33:07Zcom_915_449com_915_433col_915_4394
Gomis, O.
Lavina, B.
Rodríguez-Hernández, P.
Muñoz, A.
Errandonea, R.
Errandonea, D.
Bettinelli, M.
2017-04-20T08:44:10Z
2017-04-20T08:44:10Z
2017
0953-8984
http://riull.ull.es/xmlui/handle/915/4493
Zircon-type HoPO4 and TmPO4 have been studied by single-crystal x-ray diffraction and ab initio calculations. We report information on the influence of pressure on the crystal structure, and on the elastic and thermodynamic properties. The equation of state for both compounds is accurately determined. We have also obtained information on the polyhedral compressibility which is used to explain the anisotropic axial compressibility and the bulk compressibility. Both compounds are ductile and more resistive to volume compression than to shear deformation at all pressures. Furthermore, the elastic anisotropy is enhanced upon compression. Finally, the calculations indicate that the possible causes that make unstable the zircon structure are mechanical instabilities and the softening of a silent B1u mode.
en
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Zirconio
Ortofosfatos
Propiedades elásticas
Ecuación de estado
Cálculos ab initio
Difracción de rayos X
Alta presión
High-pressure structural, elastic, and thermodynamic properties of zircon-type HoPO4 and TmPO4
info:eu-repo/semantics/article
oai:riull.ull.es:915/219972023-02-03T10:33:19Zcom_915_449com_915_433col_915_16010
Aeridou, Eleni
Díaz Díaz, David
Alemán, Carlos
Pérez-Madrigal, Maria M.
2020-11-30T09:12:02Z
2020-11-30T09:12:02Z
2020
http://riull.ull.es/xmlui/handle/915/21997
10.1021/acs.biomac.0c01139
Dynamic covalent chemistry applied to polymers has
attracted significant attention over the past decade. Within this area,
this review highlights the recent research on polysaccharide-based
hydrogels cross-linked by boronic acid moieties, illustrating its
versatility and relevance in biomaterials science to design selfhealing,
multiple stimuli-responsive, and adaptive biointerfaces and
advanced functional devices.
en
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info:eu-repo/semantics/embargoedAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Advanced Functional Hydrogel Biomaterials Based on Dynamic B−O Bonds and Polysaccharide Building Blocks
info:eu-repo/semantics/article
oai:riull.ull.es:915/7752023-02-03T10:33:19Zcom_915_449com_915_433col_915_755
Cruz Modino, Raquel de la
Pascual Fernández, José Jaime
2015-04-17T13:16:00Z
2015-04-17T13:16:00Z
2011
0556-4924
http://riull.ull.es/xmlui/handle/915/775
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES
Turismo
ECONOMIA SECTORIAL: TURISMO
Acción colectiva y políticas públicas de gestión marítimo-costera: el ejemplo de las reservas marinas en las islas Canarias
info:eu-repo/semantics/article
oai:riull.ull.es:915/7672023-02-03T10:33:52Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
Pascual Fernández, José Jaime
2015-04-15T09:09:03Z
2015-04-15T09:09:03Z
2003
2340-7565
http://riull.ull.es/xmlui/handle/915/767
La actividad pesquera se desarrolla en contacto
indisoluble con procesos que la trascienden y
teniendo que asumir usos alternativos y en ocasiones
contradictorios de los espacios marinos
y litorales. La competencia por los espacios, la
fuerza de trabajo, el capital e incluso el conocimiento
ha tomado en este terreno una relevancia
especial con el desarrollo de la actividad turística
en los espacios litorales.
En este trabajo intentamos analizar cómo se han producido en detalle estas interacciones en el caso canario, y en qué medida se puede plantear procesos de convergencia que afecten de manera más favorable que hasta ahora a las poblaciones de pescadores artesanales.
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
ECONOMIA SECTORIAL: TURISMO
Turismo
Research Subject Categories::SOCIAL SCIENCES
Pesca y turismo: conflictos, sinergias y usos múltiples en Canarias
info:eu-repo/semantics/article
oai:riull.ull.es:915/7622023-02-03T15:48:55Zcom_915_449com_915_433col_915_755
Hernández Martín, Raúl
Santana Talavera, Agustín
2015-04-07T12:37:46Z
2015-04-07T12:37:46Z
2010
978-84-614-3386-5
http://riull.ull.es/xmlui/handle/915/762
Uno de los temas transversales de mayor interés y que despierta especial
atención entre los investigadores sobre turismo en Canarias es el de los destinos
turísticos maduros. Ello tanto por encontrarse el Archipiélago en esta situación,
como por el desafío que suponen el análisis de esta compleja realidad y las
propuestas que emanen de él, más o menos extensibles a otros destinos según
su singularidad
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Research Subject Categories::SOCIAL SCIENCES
Destinos turísticos maduros ante el cambio : reflexiones desde Canarias
info:eu-repo/semantics/book
oai:riull.ull.es:915/7662023-02-03T10:34:44Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
2015-04-15T08:49:32Z
2015-04-15T08:49:32Z
2003
1695-7121
http://riull.ull.es/xmlui/handle/915/766
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES
Turismo
ECONOMIA SECTORIAL: TURISMO
Patrimonios culturales y turistas: unos leen lo que otros miran
info:eu-repo/semantics/article
oai:riull.ull.es:915/220032023-02-03T10:36:12Zcom_915_449com_915_433col_915_16010
Nandi, Mridula
Maiti, Binoy
Díaz Díaz, David
2020-11-30T14:09:46Z
2020-11-30T14:09:46Z
2020
http://riull.ull.es/xmlui/handle/915/22003
aisy.202000214
Shape memory polymer actuators have attracted great attention in the past few
decades for developing soft robots, artificial muscles, and biomedical implants,
among others. Herein, under a tutorial perspective, a series of shape memory
actuators that display unidirectional movement upon exposure to specific
external stimuli is explored. The mechanistic details associated with the
movement of each system are also highlighted. In general, an overview of basic
design principles, the chemical structure of molecular switches, the strategies
used to achieve such controlled and unidirectional movement, as well as key
experimental aspects, is provided. The most critical challenges of the existing
devices that limit their practical applicability are also discussed. This is of utmost
importance because such limitations must be overcome to fabricate micromotors
that can generate complex movements, other than simple stretching/contraction
or bending, to perform complex tasks.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Actuators Displaying Unidirectional Movement
info:eu-repo/semantics/article
oai:riull.ull.es:915/214502023-02-03T10:36:17Zcom_915_449com_915_433col_915_16010
Castellanos-Soriano, Jorge
Herrera-Luna, Jorge C.
Díaz Díaz, David
Jiménez, M. Consuelo
Pérez-Ruiz, Raúl
2020-10-01T08:53:59Z
2020-10-01T08:53:59Z
2020
http://riull.ull.es/xmlui/handle/915/21450
10.1039/d0qo00466a
Currently, evolution of chemical transformations by visible light irradiation is highly desirable from cost,
safety, availability, and environmental friendliness points of view. Besides, activation of less reactive substrates
under very mild conditions becomes one of the most challenging tasks in organic synthesis.
However, the insufficient energy provided by one photon of visible light for their activation definitely
makes necessary the development of new protocols together with the design of new photocatalytic
systems to overcome this limitation. In this context, the implementation of biphotonic processes has
been found to be a solution for these drawbacks. This new mechanistic paradigm which combines light
upconversion processes with energy/electron transfers holds great potential for high energy demanding
bond activations, expanding the accessible reactivity window. Here, we wish to highlight the recent applications
of biphotonic processes in organic synthesis.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Recent applications of biphotonic processes in organic synthesis
info:eu-repo/semantics/article
oai:riull.ull.es:915/112132023-02-03T15:49:00Zcom_915_449com_915_433col_915_10711
Aguiar Aguilar, Maravillas
2018-11-06T14:19:36Z
2018-11-06T14:19:36Z
2014
978- 84-695-9538-1
http://riull.ull.es/xmlui/handle/915/11213
es
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es_ES
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Lengua árabe
La navegación en el Atlántico Sur en la Baja Edad Media: a propósito de Canarias y la entrada uqiyānus del Kitāb al-rawḍ al-mi‘ṭār fī jabar alaqṭār de Ibn ‘Abd al-Mun‘im al-Himyarī (m. 900/1494)
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/7842023-02-03T10:36:36Zcom_915_449com_915_433col_915_755
Pascual Fernández, José Jaime
2015-04-23T17:34:39Z
2015-04-23T17:34:39Z
2003
1695-7121
http://riull.ull.es/xmlui/handle/915/784
Los patrones de desarrollo de las últimas décadas en Canarias y en otras zonas
del Estado han originado nuevos usos del espacio marítimo y litoral. Frente a los
tradicionales vinculados a la pesca, ahora dominan frecuentemente los turísticos y
recreativos. La naturaleza, construida o recreada, se convierte especialmente en los últimos años en un atractivo clave para muchos destinos. En este contexto, las reservas marinas intentan preservar ciertas zonas de especial valor biológico de los excesos de la pesca, a ...
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
Del “mar es de todos” al mar reservado: turistas, poblaciones de pescadores y reservas marinas en Canarias
info:eu-repo/semantics/article
oai:riull.ull.es:915/112152023-02-03T10:26:21Zcom_915_449com_915_433col_915_10711
Aguiar Aguilar, Maravillas
2018-11-06T14:28:51Z
2018-11-06T14:28:51Z
2014
0300-8169
http://riull.ull.es/xmlui/handle/915/11215
es
Lengua árabe
Aproximación al léxico árabe medieval de la epidemia y de la peste
info:eu-repo/semantics/article
oai:riull.ull.es:915/7632023-02-03T10:37:16Zcom_915_449com_915_433col_915_755
Díaz Rodríguez, Pablo
Rodríguez Darias, Alberto Jonay
Santana Talavera, Agustín
2015-04-07T12:49:16Z
2015-04-07T12:49:16Z
2010
1695-7121
http://riull.ull.es/xmlui/handle/915/763
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Research Subject Categories::SOCIAL SCIENCES
Turismo
El análisis de la imagen proyectada: una propuesta para la formalización de folletos y webs turísticas
info:eu-repo/semantics/article
oai:riull.ull.es:915/43952023-02-03T10:37:23Zcom_915_449com_915_433col_915_4394
Panchal, V.
Errandonea, D.
Manjón, F.J.
Muñoz, A.
Rodríguez-Hernández, P.
Achary, S.N.
Tyagi, A.K.
2017-03-30T07:45:06Z
2017-03-30T07:45:06Z
2017
0022-3697
http://riull.ull.es/xmlui/handle/915/4395
http://dx.doi.org/10.1016/j.jpcs.2016.10.001
High-pressure Raman-scattering measurements and ab initio calculations on NdVO4 have been carried out up to 30 GPa. Our combined experimental and theoretical study confirms that beyond 5.9 GPa NdVO4 undergoes an irreversible zircon to monazite transition. The coexistence of zircon and monazite phases is experimentally observed up to ~8 GPa (which agrees with the theoretical transition pressure), stabilizing the monazite phase as a single phase around 10 GPa. Calculations additionally predict the existence of a second high-pressure phase transition at 12.4 GPa. This reversible phase transition has been experimentally observed beyond 18.1 GPa and remains stable up to 30 GPa. The post-monazite phase is predicted to have a monoclinic structure isomorphic to the BaWO4-II type structure. The calculated structure for the three polymorphs of NdVO4 is reported and the pressure dependence of their Raman modes is discussed.
en
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es_ES
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Espectroscopia
Alta presión
High-pressure lattice-dynamics of NdVO4
info:eu-repo/semantics/article
oai:riull.ull.es:915/7762023-02-03T10:37:46Zcom_915_449com_915_433col_915_755
Díaz Rodríguez, Pablo
Rodríguez Darias, Alberto Jonay
Santana Talavera, Agustín
2015-04-20T10:27:55Z
2015-04-20T10:27:55Z
2012
DÍAZ RODRÍGUEZ, Pablo; RODRÍGUEZ DARIAS, Alberto Jonay; SANTANA TALAVERA, Agustín. Sociedad y paisaje: una aproximación al análisis de la conectividad socioecológica. Altre Modernità, [S.l.], p. 152-168, feb. 2012. ISSN 2035-7680. Disponible en: <http://riviste.unimi.it/index.php/AMonline/article/view/2019/2258>. Fecha de acceso: 20 Apr. 2015 doi:10.13130/2035-7680/2019.
2035-7680
http://riull.ull.es/xmlui/handle/915/776
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Research Subject Categories::SOCIAL SCIENCES::Business and economics::Human geography, economic geography::Economic geography
Turismo
Sociedad y paisaje: un aproximación al análisis de la conectividad sociológica
info:eu-repo/semantics/article
oai:riull.ull.es:915/7782023-02-03T10:38:38Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
Díaz Rodríguez, Pablo
Rodríguez Darias, Alberto Jonay
2015-04-20T12:20:33Z
2015-04-20T12:20:33Z
2011
2171-4924
http://riull.ull.es/xmlui/handle/915/778
Los espacios protegidos constituyen un fenómeno mundial de gran trascendencia socioecológica. Generalmente, la figura de Parque Nacional (PN) se origina desde un prisma reduccionista, centrado en ‘la naturaleza’ y prescindiendo en gran medida del reconocimiento de la influencia de las poblaciones locales, quienes suelen ser parte integrante y contribuyente de los valores del entorno que se quiere proteger. En este contexto, la antropología sociocultural
parece cada vez más emplazada a aportar perspectivas relevantes para la conservación y gestión de la naturaleza, como viene ocurriendo desde hace más tiempo con las ciencias biofísicas. La propuesta de PN en la isla de Fuerteventura incluye, por primera vez en España, un equipo
de antropólogos para elaborar el estudio conducente al Plan de Ordenación de los Recursos Naturales. El trabajo aquí presentado contextualiza esta participación y resume los rasgos del estudio que aporta este equipo a un proyecto actualmente en desarrollo.
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
Research Subject Categories::SOCIAL SCIENCES::Social sciences::Social anthropology/ethnography::Social anthropology
Transdisciplinariedad y diseño de espacios naturales protegidos: la aportación antropológica
info:eu-repo/semantics/article
oai:riull.ull.es:915/213122023-02-03T15:49:01Zcom_915_449com_915_433col_915_16010
de la Cruz, Raquel
Díaz Díaz, David
2020-09-28T08:20:34Z
2020-09-28T08:20:34Z
2020
http://riull.ull.es/xmlui/handle/915/21312
10.1007/12_2019_57
Hydrogels derived from biopolymers, also called biohydrogels, have
shown potential for brain injury therapy due to their tunable physical, chemical,
and biological properties. Among different biohydrogels, those made from collagen
type I are very promising candidates for the reparation of nervous tissues due to its
biocompatibility, noncytotoxic properties, injectability, and self-healing ability.
Moreover, although collagen does not naturally occur in the brain, it has been
demonstrated that collagen type I, which resides in the basal lamina of the
subventricular zone in adults, supports neural cell attachment, axonal growth, and
cell proliferation due to its intrinsic content of specific cell-signaling domains. This
chapter summarizes the most relevant results obtained from both in vitro and in vivo
studies using self-healing biohydrogels based on collagen type I as key component
in the field of neuroregeneration.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Self-Healing Collagen-Based Hydrogel for Brain Injury Therapy
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/213242023-02-03T10:39:48Zcom_915_449com_915_433col_915_16010
Dare, Enock O.
Vendrell-Criado, Victoria
Jiménez, M. Consuelo
Pérez-Ruiz, Raúl
Díaz Díaz, David
2020-09-28T11:08:54Z
2020-09-28T11:08:54Z
2020
http://riull.ull.es/xmlui/handle/915/21324
10.1002/chem.202001908
The recent demand for fluorescent labeled materials
(FLMs) in forensic security concepts such as latent fingerprints (LFs)
that encodes information for anti-counterfeiting and encryption of
confidential data makes necessary the development of building new
and innovative materials. Here, novel FLMs based on Polyhedral
Oligomeric Silsesquioxanes (POSS) functionalized with fluorophores
via “click” reactions have been successfully synthesized and fully
characterized. A comprehensive study of their photophysical
properties has displayed large Stokes’s shift together with good
photostability in all cases, fulfilling the fundamental requisites for any
legible LF detection on various surfaces. The excellent performance
of the hetero-bifunctional FLM in the visualization of LF is emphasized
by their legibility, selectivity, sensitivity and temporal photostability. In
this study, development mechanisms have been proposed and the
overall concept constitute a novel approach for vis-à-vis forensic
investigations to trace an individual’s identity.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Novel Fluorescent Labeled Octasilsesquioxanes Nanohybrids as Potential Materials for Latent Fingerprinting Detection
info:eu-repo/semantics/article
oai:riull.ull.es:915/220072023-02-03T10:40:01Zcom_915_449com_915_433col_915_16010
Bertran, Oscar
Saldías, César
Díaz Díaz, David
Alem´an, Carlos
2020-12-01T08:30:10Z
2020-12-01T08:30:10Z
2020
http://riull.ull.es/xmlui/handle/915/22007
10.1016/j.polymer.2020.123072
The microscopic mechanism accounting for the self-healing attribute of aromatic ionene-forming hydrogels
derived from 1,4-diazabicyclo [2.2.2]octane (DABCO) and N,N’-(x-phenylene)dibenzamide (x = ortho-/meta-/
para-) is unknown. Interestingly, the self-healing property of such DABCO-containing hydrogels is largely
dependent on the polymer topology, the ortho ionene being the only self-healable without adding oppositely
charged species. In this work, Molecular Dynamics (MD) simulations have been conducted to evaluate the influence
of the topology on ionene⋅⋅⋅ionene and ionene⋅⋅water interactions, as well as their effect on the selfhealing
behavior. For this purpose, destabilized and structurally damaged models were produced for ionene
hydrogels with ortho, meta and para topologies and used as starting geometries for simulations. These models
were allowed to evolve without any restriction during MD production runs and, subsequently, the temporal
evolution of ionene⋅⋅⋅ionene and water⋅⋅⋅ionene interactions was examined. Analysis of the results indicated that
the ortho-isomer rapidly forms unique interactions that are not detected for other two isomers. Thus, in addition
to the interactions also identified for the meta-and para-ionenes, the ortho-isomer exhibits the formation of strong
intermolecular three-centered (N–)H⋯O (=C)⋯H (–N) hydrogen bonds, intramolecular planar sandwich π-π
stacking interactions and Cl- ⋅⋅⋅N+ electrostatic interactions. Furthermore, the amount of intermolecular π-π
stacking interactions and the strength of water⋅⋅⋅polymer interaction are also influenced by the topology, favoring
the stabilization of the ortho-ionene reconstituted hydrogels. Overall, the arrangement of the functional
groups in the ortho topology favors the formation of more types of ionene⋅⋅⋅ionene interactions, as well as
stronger interactions, than in the meta and para topologies.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Molecular dynamics simulations on self-healing behavior of ionene polymer-based nanostructured hydrogels
info:eu-repo/semantics/article
oai:riull.ull.es:915/47082023-02-03T10:40:34Zcom_915_449com_915_433col_915_4394
Ruiz-Fuertes, J.
Friedrich, A.
Errandonea, D.
Segura, A.
Morgenroth, W.
Rodríguez-Hernández, P.
Muñoz, A.
Meng, Y.
2017-05-22T11:32:16Z
2017-05-22T11:32:16Z
2017
2469-9950
http://riull.ull.es/xmlui/handle/915/4708
The optical absorption of CdWO4 is reported at high pressures up to 23 GPa. The onset of a phase transition was detected at 19.5 GPa, in good agreement with a previous Raman spectroscopy study. The crystal structure of the high-pressure phase of CdWO4 was solved at 22 GPa, employing single-crystal synchrotron x-ray diffraction. The symmetry changes from space group P2/c in the low-pressure wolframite phase to P21/c in the high-pressure postwolframite phase accompanied by a doubling of the unit-cell volume. The octahedral oxygen coordination of the tungsten and cadmium ions is increased to [7]-fold and [6+1]-fold, respectively, at the phase transition. The compressibility of the low-pressure phase of CdWO4 has been reevaluated with powder x-ray diffraction up to 15 GPa, finding a bulk modulus of B0=123 GPa. The direct band gap of the low-pressure phase increases with compression up to 16.9 GPa at 12 meV/GPa. At this point an indirect band gap crosses the direct band gap and decreases at −2 meV/GPa up to 19.5 GPa where the phase transition starts. At the phase transition the band gap collapses by 0.7 eV and another direct band gap decreases at –50 meV/GPa up to the maximum measured pressure. The structural stability of the postwolframite structure is confirmed by ab initio calculations, finding the postwolframite-type phase to be more stable than the wolframite at 18 GPa. Lattice dynamic calculations based on space group P21/c explain well the Raman-active modes previously measured in the high-pressure postwolframite phase. The pressure-induced band gap crossing in the wolframite phase as well as the pressure dependence of the direct band gap in the high-pressure phase are further discussed with respect to the calculations.
en
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es_ES
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Alta presión
Transición de fase
Optical and structural study of the pressure-induced phase transition of CdWO4
info:eu-repo/semantics/article
oai:riull.ull.es:915/101842021-11-05T09:57:56Zcom_915_449com_915_433col_915_10711
Aguiar Aguilar, Maravillas
2018-09-26T06:25:05Z
2018-09-26T06:25:05Z
http://riull.ull.es/xmlui/handle/915/10184
No autorizo la publicación del documento
The Quatri partitu en cosmographia pratica i por otro nombre llamado Espejo de navegantes by Alonso de Chaves: a navigation manual for the instruction of Spanish pilots in the sixteenth century
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/213432023-02-03T10:41:53Zcom_915_449com_915_433col_915_16010
Alegre-Requena, Juan V.
Herrera, Raquel P.
Díaz Díaz, David
2020-09-28T12:21:05Z
2020-09-28T12:21:05Z
2020
http://riull.ull.es/xmlui/handle/915/21343
10.1002/cplu.202000473
Arene regioisomerism in low-molecular-weight gelators can be
exploited as a tool to modulate the micro-structures of the
corresponding xerogel networks by using the three different
possible substitution patterns ortho, meta and para. This
aromatic regioisomer-driven strategy has been used with a
cholesterol-based gelator to prepare hollow self-assembled
organic nanotubes (S-ONTs) with inside and outside diameters
of ca. 35 and 140 nm, respectively. Electron microscopy imaging
and theoretical calculations were employed to rationalize the
formation mechanism of these S-ONTs. From the three possible
regioisomers, only the ortho-disubstituted cholesteryl-based
gelator showed the optimal angle and distance between
substituents to afford the formation of the cyclic assemblies
required for nanotube growth by assembling 30–40 units of the
gelator. This study opens fascinating opportunities to expand
the synthesis of controllable and unique microstructures by
modulating geometrical parameters through aromatic regioisomers.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Self-Assembly of Hollow Organic Nanotubes Driven by Arene Regioisomerism
info:eu-repo/semantics/article
oai:riull.ull.es:915/44712023-02-03T10:41:58Zcom_915_449com_915_433col_915_4394oai:riull.ull.es:915/7792023-02-03T15:48:55Zcom_915_449com_915_433col_915_755
Pascual Fernández, José Jaime
Mesa Moreno, Ciro
Pérez Sosa, Andrés J.
2015-04-20T16:29:55Z
2015-04-20T16:29:55Z
1982
http://riull.ull.es/xmlui/handle/915/779
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
La pesca en Canarias: un análisis antropológico social
info:eu-repo/semantics/book
oai:riull.ull.es:915/213012023-02-03T10:42:21Zcom_915_449com_915_433col_915_16010
Mumuni, Momoh A.
Calister, Ugwu E.
Aminu, Nafiu
Franklin, Kenechukwu C.
Musiliu, Adedokun O.
Usman, Mohammed
Abdulmumuni, Barikisu
James, Oyeniyi Y.
Ofokansi, Kenneth C.
Anthony, Attama A.
Ibezim, Emmanuel C.
Díaz Díaz, David
2020-09-25T08:36:49Z
2020-09-25T08:36:49Z
2020
http://riull.ull.es/xmlui/handle/915/21301
10.3390/app10082649
In this study, different ratios of mucin-grafted polyethylene-glycol-based microparticles
were prepared and evaluated both in vitro and in vivo as carriers for the oral delivery of insulin.
Characterization measurements showed that the insulin-loaded microparticles display irregular
porosity and shape. The encapsulation efficiency and loading capacity of insulin were >82%
and 18%, respectively. The release of insulin varied between 68% and 92% depending on the
microparticle formulation. In particular, orally administered insulin-loaded microparticles resulted in
a significant fall of blood glucose levels, as compared to insulin solution. Subcutaneous administration
showed a faster, albeit not sustained, glucose fall within a short time as compared to the polymeric
microparticle-based formulations. These results indicate the possible oral delivery of insulin using
this combination of polymers.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Mucin-Grafted Polyethylene Glycol Microparticles Enable Oral Insulin Delivery for Improving Diabetic Treatment
info:eu-repo/semantics/article
oai:riull.ull.es:915/213322023-02-03T10:42:49Zcom_915_449com_915_433col_915_16010
Jessop, I.
Albornoz, J.
Ramírez, O.
Durán, B.
Molero, L.
Bonardd, S.
Kortaberria, G.
Diaz Diaz, David
Leiva, A.
Saldías, César
2020-09-28T11:41:02Z
2020-09-28T11:41:02Z
2020
http://riull.ull.es/xmlui/handle/915/21332
10.1016/j.carbpol.2020.116822
Biobased tractable films consisting of blends of chitosan (CS) with polymer bearing carbazole derivatives as
pendant groups and fluorene-thiophene as donor-acceptor units (referred to as DA) were prepared, and their
optical, morphological and photocatalytic properties were studied. DA was dissolved in tetrahydrofuran (THF)
and mixed with an acidified aqueous solution containing chitosan to obtain chitosan/DA (CS/DA) films by
solution casting. The fabricated biobased films were characterized using spectroscopic techniques (FT-IR and
UV–vis), thermogravimetry, mechanical assays, contact angle analysis, and atomic force microscopy (AFM). The
effects of varying DA compositions and the results of exposure to visible-light irradiation of the films were also
analyzed. The results indicated the existence of interactions between chitosan and DA and a potentially profitable
light-driven response of these biobased films. This behavior was reflected in the optical, topographical,
and contact angle properties of the films, which exhibited different characteristics before and after visible-light
exposure. Finally, the photocatalytic performance of the biobased films was tested via the decomposition of
methyl orange (MO), as a reaction model system. Our results revealed a significant photocatalytic activity
(according to biobased film composition, approximately 64 % and 87 % of methyl orange were degraded under
continuous visible-light irradiation for 120 min) of the films which is attributed to the combined presence and
synergetic effects of the film-forming ability of chitosan and the photoproperties of DA.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Optical, morphological and photocatalytic properties of biobased tractable films of chitosan/donor-acceptor polymer blends
info:eu-repo/semantics/article
oai:riull.ull.es:915/7922023-02-03T15:49:02Zcom_915_449com_915_433col_915_755
Pascual Fernández, José Jaime
2015-05-05T15:38:37Z
2015-05-05T15:38:37Z
1993
http://riull.ull.es/xmlui/handle/915/792
La polémica sobre el tema de los recursos comunes tiene una larga historia en las
disciplinas sociales. No vamos a hacer aquí una descripción sistemática de cómo ha sido
tratado este problema a lo largo del tiempo. Baste decir que la propiedad común, o las
formas de apropiación comunal de los recursos, han acompañado al hombre a lo largo de toda su historia. En este sentido, si tenemos en cuenta la larga biografía del hombre como cazador recolector, es la propiedad privada, tal y como la entiende el mundo occidental, ...
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
Apuntes para el debate en torno a la tragedia de los comunes
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/7832023-02-03T10:45:06Zcom_915_449com_915_433col_915_755
Pascual Fernández, José Jaime
2015-04-22T18:20:37Z
2015-04-22T18:20:37Z
2004
1695-7121
http://riull.ull.es/xmlui/handle/915/783
Las investigaciones sobre las poblaciones vinculadas al sector primario fueron, durante los setenta y los ochenta, uno de los themata dominantes en la antropología española.
Siguiendo a Joan Prat, podríamos decir que hasta mediados de los setenta la disciplina en
España se centra en tres objetos de estudio (1991: 118): las monografías de comunidad, el campesinado y los pueblos marginados del Estado Español. La atención que desde los
núcleos académicos fundadores de ldisciplina en España se dio al tema de la pesca ...
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
Las investigaciones sobre la pesca en Canarias: entre las reservas marinas y las nuevas formas de pescaturismo
info:eu-repo/semantics/article
oai:riull.ull.es:915/7802023-02-03T15:49:03Zcom_915_449com_915_433col_915_755
Pascual Fernández, José Jaime
2015-04-20T19:17:53Z
2015-04-20T19:17:53Z
2005
84-88429-10-X
http://riull.ull.es/xmlui/handle/915/780
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
La mujer en la pesca, la acuicultura y el marisqueo en el contexto comunitario
info:eu-repo/semantics/bookPart
oai:riull.ull.es:915/7642023-02-03T10:45:40Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
2015-04-07T13:09:41Z
2015-04-07T13:09:41Z
2008
Santana Talavera, Agustín. (2008). El turismo cultural. ¿Un negocio responsable?. Estudios y Perspectivas en Turismo, Diciembre-Sin mes, 272-290.
0327-5841
0327-5841
http://riull.ull.es/xmlui/handle/915/764
Cuestiones como la degradación el medioambiente, la pérdida de la diversidad
cultural y especialmente lo considerado como patrimonio cultural y la ecología, son actualmente
aspectos consustanciales a la vida cotidiana, a la política, a la planificación y a los negocios. En
la Cumbre de la Tierra (Río de Janeiro, 1992) se acuña el concepto Turismo Responsable en
un intento de impulsar el respeto y la preservación, implicando en la tarea a todos los actores.
Bajo el paraguas de la responsabilidad, uno de los productos con mayor crecimiento y
demanda en la última década ha sido el turismo cultural, planteado ahora como una de las
fórmulas para la consecución del desarrollo integral de los pueblos. En este artículo se repasa
el turismo cultural como producto, su importancia en el nuevo orden turístico y su alcance,
constatando como a través de él el sistema turístico ha tendido a implicarse en la gestión de la
cultura y condicionarla por su rentabilidad.
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Research Subject Categories::SOCIAL SCIENCES
Turismo
El turismo cultural : ¿un negocio responsable?
info:eu-repo/semantics/article
oai:riull.ull.es:915/7892023-02-03T10:46:38Zcom_915_449com_915_433col_915_755
Cruz Modino, Raquel de la
Pascual Fernández, José Jaime
2015-05-04T08:43:39Z
2015-05-04T08:43:39Z
2013
2174-6796
http://riull.ull.es/xmlui/handle/915/789
La gobernabilidad (Kooiman, 2008) de los espacios marinos protegidos constituye
un reto para las políticas actuales de protección de los ecosistemas. Los conflictos en
torno a la creación y funcionamiento de estos modelos institucionales son mucho más
frecuentes de lo deseable, llevando a cuestionar en ocasiones su viabilidad. En este
trabajo analizamos el proceso de creación de la Reserva Marina Punta de La Restinga—Mar de las Calmas, considerando especialmente la implicación de los usuarios locales
en su gestación. Ponemos el énfasis en una serie de factores que entendemos esenciales
para su éxito, destacando las características de un proceso que permitió que el diseño
institucional y las imágenes que definían en la mente de los locales a esta figura de
protección, se fueran gestando lentamente con la implicación tanto de los usuarios como
de científicos y autoridades. Los procesos de creación de estas figuras con frecuencia
divergen claramente de lo que hemos hallado en este caso, y asumimos que esto conduce
a muchas de las dificultades para su implementación y gestión. Por ello, enfatizar los esfuerzos necesarios en las fases iniciales de la gestación de los espacios protegidos suele ser esencial para su viabilidad futura.
es
Research Subject Categories::HUMANITIES and RELIGION::History and philosophy subjects::Ethnology::Cultural anthropology
¿Áreas marinas protegidas para mejorar la gobernabilidad local?
info:eu-repo/semantics/article
oai:riull.ull.es:915/214642023-02-03T10:47:25Zcom_915_449com_915_433col_915_16010
Tautz, Markus
Weimar, Andreas
Graßl, Christian
Welzel, Martin
Díaz Díaz, David
2020-10-01T11:42:36Z
2020-10-01T11:42:36Z
2020
http://riull.ull.es/xmlui/handle/915/21464
10.1002/pssa.202000221
Etching of gallium nitride is a key step in the production of blue and white
light-emitting diodes (LEDs). Etching in aqueous KOH solution creates a rough
surface on the LED chip to facilitate outcoupling of the photons generated,
drastically increasing the resulting LED’s efficiency. Compared with the common
technique of dry etching, wet-chemical etching using aqueous KOH solution
has significant advantages, e.g., lower complexity and cost and less remaining
surface damage. An in-depth analysis of the molecular etch reaction by characterization
of the reaction products is reported. The mechanism identified
explains the cause of anisotropic etching, which leads to the formation of
hexagonal pyramids. The concept of hydroxide repulsion by protruding NH
and NH2 groups established in the literature is adapted and further developed.
The susceptibility of several polar, semipolar, and nonpolar crystal facets may
also be explained, as well as the commonly observed increase in average pyramid
size over etch time.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Anisotropy and Mechanistic Elucidation of Wet-Chemical Gallium Nitride Etching at the Atomic Level
info:eu-repo/semantics/article
oai:riull.ull.es:915/214062023-02-07T14:48:37Zcom_915_449com_915_433col_915_16010
Dare, Enock O.
Vendrell-Criado, Victoria
Jim´enez, M. Consuelo
Pérez-Ruiz, Raúl
Díaz Díaz, David
2020-09-30T08:09:55Z
2020-09-30T08:09:55Z
2021
http://riull.ull.es/xmlui/handle/915/21406
10.1016/j.dyepig.2020.108841
The largely demand in continued security issues makes necessary the development of novel materials with
outstanding properties to improve the current detection techniques. In this context, latent fingerprint (LF) by
fluorescent labeled materials (FLM) is one of the most attractive personnel identification methodologies. Here,
two FLM based on polyhedral oligomeric silsesquioxane (POSS) nanohybrids labeled with dansyl chromophores
have been synthesized and fully characterized. Their photophysical properties have confirmed that these materials
clearly possess the prime qualifications as suitable LF sensing platforms. In fact, they adequately detect LFs
on glassy surface with excellence legibility.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Highly efficient latent fingerprint detection by eight-dansyl-functionalized octasilsesquioxane nanohybrids
info:eu-repo/semantics/article
oai:riull.ull.es:915/7742023-02-03T10:47:40Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
2015-04-17T11:16:33Z
2015-04-17T11:16:33Z
2003
: 0104-7183
http://riull.ull.es/xmlui/handle/915/774
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES
Turismo Cultural, Culturas Turísticas
info:eu-repo/semantics/article
oai:riull.ull.es:915/7852023-02-03T10:48:05Zcom_915_449com_915_433col_915_755
Rodríguez Darias, Alberto Jonay
Santana Talavera, Agustín
Díaz Rodríguez, Pablo
2015-04-27T08:23:05Z
2015-04-27T08:23:05Z
2010
SANTANA TALAVERA, Agustín; DIAZ RODRIGUEZ, Pablo; RODRIGUEZ DARIAS, Alberto Jonay. Las nuevas formas de turismo: causas y características. Revista Brasileira de Pesquisa em Turismo. v.4, n.3, p.54-70, dez. 2010
1982-6125
http://riull.ull.es/xmlui/handle/915/785
El turismo a nivel internacional ha pasado por importantes cambios, entre ellos el que se produjo a mediados del siglo XX y dio lugar al sistema turístico tal y como lo conocemos. Sin embargo, en las últimas dos décadas parece que el escenario se modifica a mayor velocidad; la aparición de lo que a mitad de la década de los 90 se denominaron “nuevas formas de turismo” ha cambiado las reglas del juego en múltiples sentidos y perspectivas, abriendo al Planeta como destino y consolidando el “todo puede ser vendido a un turista”. Este trabajo trata de determinar las causas de estas modificaciones e incitar el debate basado en las relaciones de aquellas “nuevas formas de turismo” y las que surgen en la actualidad
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES::Social sciences
Turismo
ECONOMIA SECTORIAL: TURISMO
Las nuevas formas de turismo: causas y características
info:eu-repo/semantics/article
oai:riull.ull.es:915/7882023-02-03T15:48:55Zcom_915_449com_915_433col_915_755
2015-04-27T10:35:57Z
2015-04-27T10:35:57Z
2011
978-84-88429-15-5
http://riull.ull.es/xmlui/handle/915/788
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES::Social sciences
Turismo
Turismo
Turismo y patrimonio: entramados narrativos
info:eu-repo/semantics/book
oai:riull.ull.es:915/7652023-02-03T10:48:28Zcom_915_449com_915_433col_915_755
Santana Talavera, Agustín
2015-04-15T08:23:45Z
2015-04-15T08:23:45Z
2003
1132-6581
http://riull.ull.es/xmlui/handle/915/765
In general terms, the "impact" of tourism refers to the imprint that the tourist, tourism, and its associated infrastructures leave on an environment that has been converted into
a destination. As anthropologists, we are interested in analyzing a specific aspect of these impacts, even though it
can hardly be isolated from the whole: the changes in and
interrelations of actors in concrete situations.
This article tries to emphasize these encounters (considered
as obligations, negotiation processes, or ludic elements), which will occasion the diverse ways in which the sociocultural impact of tourism shows itself, generating, as whole, perfectly articulated identities capable of realizing
themselves at the rhythm imposed by the touristic system. Far
from considering that this activity perverts the populations and
cultures in which it is developed, these demonstrate their great capacity for adaptation in the exploitation of a
new resource, the tourist.
ca
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
Research Subject Categories::SOCIAL SCIENCES
ECONOMIA SECTORIAL: TURISMO
Turismo
Jugant a ser amfitrions: trobades i impactes en el sistema turístic
info:eu-repo/semantics/article
oai:riull.ull.es:915/7822023-02-03T15:48:55Zcom_915_449com_915_433col_915_755
2015-04-22T17:32:05Z
2015-04-22T17:32:05Z
2005
84-88429-09-6
http://riull.ull.es/xmlui/handle/915/782
The international AKTEA conference “Women in fisheries and aquaculture: lessons from the
past, current actions and dreams for the future”, that took place from 10–13 November 2004 in Santiago de Compostela (Spain), brought together over 175 persons from 26 countries from all parts of the world, including fisherwomen, fishers' wives, shellfish gatherers, shellfish farmers, social and natural scientists, civil servants, social workers, politicians, fish sellers and processors. It created a forum where these diverse groups of women and men were ...
en
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
Women in fisheries and aquaculture: lessons from the past, current actions and ambitions for the future
info:eu-repo/semantics/book
oai:riull.ull.es:915/7912023-02-03T10:48:51Zcom_915_449com_915_433col_915_755
Pascual Fernández, José Jaime
2015-05-04T18:28:19Z
2015-05-04T18:28:19Z
1997
1137-439X
http://riull.ull.es/xmlui/handle/915/791
Los antropólogos culturalistas plantean que los pescadores se caracterizan por desarrollar una actividad cazadora arriesgada en un medio adverso y por afrontar problemas similares en todo el mundo. Sin embargo, estas poblaciones difieren en cuanto a su relación con los mercados y el poder, que los pueden hacer más parecidos a campesinos o proletarios, que a sociedades de cazadores. De cualquier forma, también poseen rasgos específicos, como las
dificultades para la gestión de los recursos pesqueros.
es
Licencia Creative Commons (Reconocimiento-No comercial-Sin obras derivadas 4.0 internacional)
Turismo
Campesinos y pescadores: un problema de definición
info:eu-repo/semantics/article
oai:riull.ull.es:915/214082023-02-03T10:49:16Zcom_915_449com_915_433col_915_16010
Jiménez-Arias, David
Morales-Sierra, Sarai
Borges, Andrés A.
Díaz Díaz, David
2020-09-30T08:34:35Z
2020-09-30T08:34:35Z
2020
http://riull.ull.es/xmlui/handle/915/21408
10.1021/acs.jafc.0c02872
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/embargoedAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Biostimulant Nanoencapsulation: The New Keystone To Fight Hunger
info:eu-repo/semantics/article
oai:riull.ull.es:915/222402023-02-03T15:49:13Zcom_915_449com_915_433col_915_22239
Santos Álvarez, Anthea Gara
Bermúdez-Margaretto, Beatriz
Álvarez González, Carlos Javier
Domínguez Martínez, Alberto
2021-01-30T10:08:54Z
2021-01-30T10:08:54Z
2020
http://riull.ull.es/xmlui/handle/915/22240
These experimental materials and the reaction times (and accuracy) correspond to the article titled "The frequency of word gender as a variable for lexical access in Spanish" under review at the journal "Linguistics: An Interdisciplinary Journal of the Language Sciences". The excel file contains a sheet for the stimuli, another for the experimental RT and errors obtained by third grade children of primary school, another sheet for sixth grade children of primary school and the last one for adults.
es
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Hoja de cálculo anexa al artículo "The frequency of word gender as a variable for lexical access in Spanish"
info:eu-repo/semantics/dataset
oai:riull.ull.es:915/214892023-02-03T10:51:02Zcom_915_449com_915_433col_915_16010
Pacheco-Fernández, Idaira
Allgaier-Díaz, Diego W.
Mastellone, Giulia
Cagliero, Cecilia
Díaz Díaz, David
Pino, Verónica
2020-10-01T13:12:11Z
2020-10-01T13:12:11Z
2020
http://riull.ull.es/xmlui/handle/915/21489
10.1016/j.trac.2020.115839
Since the introduction of the Green Analytical Chemistry guidelines, there has been an increasing
concern on the sustainability of sample preparation approaches, particularly if considering they
constitute the most time-consuming step of the analytical method and the main source of laboratory
wastes. Among the alternatives explored, it is important to highlight the miniaturization of the extraction
methods, which has been accompanied by the seek of greener solvents and sorbents. Biopolymers
emerge as potential candidates to be used as sorbents in microextraction schemes given their biodegradability,
versatility, and easily functionalization. This review offers an overview on biopolymers
(chitosan, cellulose, alginate, and agarose) in sorbent-based microextraction approaches, paying attention
to the preparation of the sorbent and the format in which biopolymers are incorporated into the
sorbent/device, thus implying a specific microextraction approach, their role in the resulting sorbent
material, and the reported analytical applications, covering environmental, food, and bioclinical analysis.
en
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Biopolymers in sorbent-based microextraction methods
info:eu-repo/semantics/article
oai:riull.ull.es:915/7872023-02-03T10:51:14Zcom_915_449com_915_433col_915_755
Cruz Modino, Raquel de la
Santana Talavera, Agustín
2015-04-27T09:44:32Z
2015-04-27T09:44:32Z
2008
DE LA CRUZ MODINO, R.; SANTANA TALAVERA, A. Modelo clasificatorio de productos y turismos. El turismo de buceo en La Restinga (Islas Canarias) y L’Estartit (Cataluña). Revista Brasileira de Pesquisa em Turismo. v. 2, n. 1, p. 72-112, mar. 2008
1982-6125
http://riull.ull.es/xmlui/handle/915/787
En los últimos años, el interés por reorientar e incrementar el consumo
turístico en los destinos ha estimulado numerosas y novedosas estrategias de uso de
los recursos naturales, desde una lógica diferente a la tradicionalmente articulada por
los grupos de población local. Se reconoce que tales líneas de acción tienen unas
dimensiones generalmente sobreestimadas y se presta poca atención a los efectos
socioculturales del uso turístico del patrimonio en los destinos y sobre las poblaciones
locales. A comienzos del siglo XXI el consumo turístico patrimonial, ha generado
múltiples productos y subproductos difícilmente encuadrables en las tipologías clásicas
y, frecuentemente, impulsando el nacimiento de nuevas áreas de visita y desarrollo
turístico. En este artículo se analizan dos casos de estudio vinculados a áreas marinas
protegidas y el llamado turismo de buceo. Se trata de ejemplificar la dificultad de
establecer marcos clasificatorios generales y proponer una tipología de investigación
de productos y destinos capaz de orientar criterios para el desarrollo y prevención de
efectos no deseados.
es
LICENCIA DE DISTRIBUCIÓN NO-EXCLUSIVA (CREATIVE COMMONS)
ECONOMIA SECTORIAL: TURISMO
Turismo
Research Subject Categories::SOCIAL SCIENCES::Social sciences
Modelo clasificatorio de productos y turismos: el turismo de buceo en La Restinga (Islas Canarias) y L’Estartit (Cataluña)
info:eu-repo/semantics/article