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  1. Article ; Online: Prevalencia de derivación biliodigestiva en pacientes con diagnostico de coledocolitiasis en un hospital de alta complejidad. Periodo 2014-2018

    Miryan Idalina Día-Benítez / Esteban Daniel Mendoza-Galván

    Cirugía Paraguaya, Vol 43, Iss 2, Pp 12-

    2019  Volume 14

    Abstract: RESUMEN El procedimiento quirúrgico para la formación de una derivación biliodigestiva está indicado en diversas enfermedades biliares, incluyendo coledocolitiasis no resuelta por colangiografía retrógrada endoscópica o mediante exploración de vías ... ...

    Abstract RESUMEN El procedimiento quirúrgico para la formación de una derivación biliodigestiva está indicado en diversas enfermedades biliares, incluyendo coledocolitiasis no resuelta por colangiografía retrógrada endoscópica o mediante exploración de vías biliares quirúrgica, estenosis biliares benignas e incluso neoplasias malignas de la encrucijada biliopancreática.
    Keywords Derivación ; biliodigestiva ; coledocolitiasis ; Medicine ; R ; Surgery ; RD1-811
    Language Spanish
    Publishing date 2019-08-01T00:00:00Z
    Publisher Sociedad Paraguaya de Cirugía
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Prevalencia de las complicaciones del divertículo de Meckel y su tratamiento quirúrgico en un hospital de alta complejidad en el periodo 2018-2019

    Miryan Idalina Díaz Benítez / Esteban Daniel Mendoza Galván

    Cirugía Paraguaya, Vol 43, Iss 3, Pp 16-

    2019  Volume 18

    Abstract: El divertículo de meckel es la anomalía congénita más común del tracto digestivo y se encuentra en el 2% de la población. En su evolución, aproximadamente el 4% de los pacientes desarrollan síntomas durante toda la vida debido a complicaciones como ... ...

    Abstract El divertículo de meckel es la anomalía congénita más común del tracto digestivo y se encuentra en el 2% de la población. En su evolución, aproximadamente el 4% de los pacientes desarrollan síntomas durante toda la vida debido a complicaciones como sangrado, obstrucción, diverticulitis o perforación
    Keywords divertículo de meckel ; divertículo perforado ; complicaciones ; Medicine ; R ; Surgery ; RD1-811
    Language Spanish
    Publishing date 2019-12-01T00:00:00Z
    Publisher Sociedad Paraguaya de Cirugía
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Nanomaterial Transformations Captured by Atomic Resolution 3D Electron Microscopy.

    Bals, S / Albrecht, Wiebke / Arslan, Ece Imrak / Jenkinson, Kellie / Mychinko, Mikhail / Esteban, Daniel Arenas / Altantzis, Thomas / Van Aert, Sandra

    Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada

    2023  Volume 29, Issue Supplement_1, Page(s) 595

    Language English
    Publishing date 2023-08-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 1385710-1
    ISSN 1435-8115 ; 1431-9276
    ISSN (online) 1435-8115
    ISSN 1431-9276
    DOI 10.1093/micmic/ozad067.287
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Electrochemical Stability of Rhodium-Platinum Core-Shell Nanoparticles: An Identical Location Scanning Transmission Electron Microscopy Study.

    Vega-Paredes, Miquel / Aymerich-Armengol, Raquel / Arenas Esteban, Daniel / Martí-Sánchez, Sara / Bals, Sara / Scheu, Christina / Garzón Manjón, Alba

    ACS nano

    2023  Volume 17, Issue 17, Page(s) 16943–16951

    Abstract: Rhodium-platinum core-shell nanoparticles on a carbon support (Rh@Pt/C NPs) are promising candidates as anode catalysts for polymer electrolyte membrane fuel cells. However, their electrochemical stability needs to be further explored for successful ... ...

    Abstract Rhodium-platinum core-shell nanoparticles on a carbon support (Rh@Pt/C NPs) are promising candidates as anode catalysts for polymer electrolyte membrane fuel cells. However, their electrochemical stability needs to be further explored for successful application in commercial fuel cells. Here we employ identical location scanning transmission electron microscopy to track the morphological and compositional changes of Rh@Pt/C NPs during potential cycling (10 000 cycles, 0.06-0.8 V
    Language English
    Publishing date 2023-08-21
    Publishing country United States
    Document type Journal Article
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.3c04039
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Templated Out-of-Equilibrium Self-Assembly of Branched Au Nanoshells.

    Marchetti, Alessandro / Gori, Alessandro / Ferretti, Anna Maria / Esteban, Daniel Arenas / Bals, Sara / Pigliacelli, Claudia / Metrangolo, Pierangelo

    Small (Weinheim an der Bergstrasse, Germany)

    2023  Volume 19, Issue 12, Page(s) e2206712

    Abstract: Out-of-equilibrium self-assembly of metal nanoparticles (NPs) has been devised using different types of strategies and fuels, but achieving finite 3D structures with a controlled morphology through this assembly mode is still rare. Here, a spherical ... ...

    Abstract Out-of-equilibrium self-assembly of metal nanoparticles (NPs) has been devised using different types of strategies and fuels, but achieving finite 3D structures with a controlled morphology through this assembly mode is still rare. Here, a spherical peptide-gold superstructure (PAuSS) is used as a template to control the out-of-equilibrium self-assembly of Au NPs, obtaining a transient 3D-branched Au-nanoshell (BAuNS) stabilized by sodium dodecyl sulphate (SDS). The BAuNS dismantles upon SDS concentration gradient equilibration over time in the sample solution, leading to NPs disassembly and regression to PAuSS. Notably, BAuNS assembly and disassembly promotes temporary interparticle plasmonic coupling, leading to reversible and tunable changes of their plasmonic properties, a highly desirable behavior in the development of optoelectronic nanodevices.
    Language English
    Publishing date 2023-01-17
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2168935-0
    ISSN 1613-6829 ; 1613-6810
    ISSN (online) 1613-6829
    ISSN 1613-6810
    DOI 10.1002/smll.202206712
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Partial Hydrolysis of Diphosphonate Ester During the Formation of Hybrid TiO

    Mysore Ramesha, Bharadwaj / Pawlak, Bram / Arenas Esteban, Daniel / Reekmans, Gunter / Bals, Sara / Marchal, Wouter / Carleer, Robert / Adriaensens, Peter / Meynen, Vera

    Chemphyschem : a European journal of chemical physics and physical chemistry

    2023  Volume 24, Issue 22, Page(s) e202300437

    Abstract: The hydrolysis of the phosphonate ester linker during the synthesis of hybrid (organic-inorganic) ... ...

    Abstract The hydrolysis of the phosphonate ester linker during the synthesis of hybrid (organic-inorganic) TiO
    Language English
    Publishing date 2023-09-26
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2025223-7
    ISSN 1439-7641 ; 1439-4235
    ISSN (online) 1439-7641
    ISSN 1439-4235
    DOI 10.1002/cphc.202300437
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  7. Article: Two-Dimensional CdSe-PbSe Heterostructures and PbSe Nanoplatelets: Formation, Atomic Structure, and Optical Properties

    Salzmann, Bastiaan B.V. / Wit, Jur de / Li, Chen / Arenas-Esteban, Daniel / Bals, Sara / Meijerink, Andries / Vanmaekelbergh, Daniel

    Journal of physical chemistry. 2022 Jan. 17, v. 126, no. 3

    2022  

    Abstract: Cation exchange enables the preparation of nanocrystals (NCs), which are not reachable by direct synthesis methods. In this work, we applied Pb²⁺-for-Cd²⁺ cation exchange on CdSe nanoplatelets (NPLs) to prepare two-dimensional CdSe-PbSe heterostructures ... ...

    Abstract Cation exchange enables the preparation of nanocrystals (NCs), which are not reachable by direct synthesis methods. In this work, we applied Pb²⁺-for-Cd²⁺ cation exchange on CdSe nanoplatelets (NPLs) to prepare two-dimensional CdSe-PbSe heterostructures and PbSe NPLs. Lowering the reaction temperature slowed down the rate of cation exchange, making it possible to characterize the intermediary NCs ex situ with atomically resolved high-angle annular dark-field scanning transmission electron microscopy and optical spectroscopy. We observe that the Pb²⁺-for-Cd²⁺ cation exchange starts from the vertices of the NPLs and grows into the zinc blende CdSe (zb-CdSe) lattice as a rock salt PbSe phase (rs-PbSe), while the anion (selenium) sublattice is being preserved. In agreement with previous works on CdTe-PbTe films, the interfaces between zb-CdSe and rs-PbSe consist of shared {001} and {011} planes. The final PbSe NPLs are highly crystalline and contain protrusions at the edges, which are slightly rotated, indicating an atomic reconfiguration of material. The growth of PbSe domains into CdSe NPLs could also be monitored by the emission peak shift as a function of the exchange time. Temperature-dependent emission measurements confirm a size-dependent change of the band gap energy with temperature and reveal a strong influence of the anisotropic shape. Time-resolved photoluminescence measurements between 4 and 30 K show a dark-bright exciton-state splitting different from PbSe QDs with three-dimensional quantum confinement.
    Keywords anisotropy ; cation exchange ; energy ; nanocrystals ; photoluminescence ; physical chemistry ; selenium ; spectroscopy ; temperature ; transmission electron microscopy ; zinc
    Language English
    Dates of publication 2022-0117
    Size p. 1513-1522.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.1c09412
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Decoding Excimer Formation in Covalent-Organic Frameworks Induced by Morphology and Ring Torsion.

    Chakraborty, Jeet / Chatterjee, Amrita / Molkens, Korneel / Nath, Ipsita / Arenas Esteban, Daniel / Bourda, Laurens / Watson, Geert / Liu, Chunhui / Van Thourhout, Dries / Bals, Sara / Geiregat, Pieter / Van der Voort, Pascal

    Advanced materials (Deerfield Beach, Fla.)

    2024  , Page(s) e2314056

    Abstract: A thorough and quantitative understanding of the fate of excitons in covalent-organic frameworks (COFs) after photoexcitation is essential for their augmented optoelectronic and photocatalytic applications via precise structure tuning. The synthesis of a ...

    Abstract A thorough and quantitative understanding of the fate of excitons in covalent-organic frameworks (COFs) after photoexcitation is essential for their augmented optoelectronic and photocatalytic applications via precise structure tuning. The synthesis of a library of COFs having identical chemical backbone with impeded conjugation, but varied morphology and surface topography to study the effect of these physical properties on the photophysics of the materials is herein reported. The variation of crystallite size and surface topography substantified different aggregation pattern in the COFs, which leads to disparities in their photoexcitation and relaxation properties. Depending on aggregation, an inverse correlation between bulk luminescence decay time and exciton binding energy of the materials is perceived. Further transient absorption spectroscopic analysis confirms the presence of highly localized, immobile, Frenkel excitons (of diameter 0.3-0.5 nm) via an absence of annihilation at high density, most likely induced by structural torsion of the COF skeletons, which in turn preferentially relaxes via long-lived (nanosecond to microsecond) excimer formation (in femtosecond scale) over direct emission. These insights underpin the importance of structural and topological design of COFs for their targeted use in photocatalysis.
    Language English
    Publishing date 2024-04-15
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1474949-X
    ISSN 1521-4095 ; 0935-9648
    ISSN (online) 1521-4095
    ISSN 0935-9648
    DOI 10.1002/adma.202314056
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  9. Article ; Online: Zonas de interés turístico y ordenamiento territorial en Chile

    Esteban Daniel Szmulewicz Ramírez

    Turismo y Sociedad, Vol

    2014  Volume 15

    Abstract: El estudio identifica y analiza las normas sobre uso del territorio en Chile, concluyendo que estas carecen de la coherencia, armonía y plenitud necesarias como para ser denominadas “sistema de ordenamiento territorial”, lo que genera efectos negativos ... ...

    Abstract El estudio identifica y analiza las normas sobre uso del territorio en Chile, concluyendo que estas carecen de la coherencia, armonía y plenitud necesarias como para ser denominadas “sistema de ordenamiento territorial”, lo que genera efectos negativos en el desarrollo del turismo. En este contexto, la nueva Ley de Turismo estableció la figura de las zonas de interés turístico (zoit), asociada a débiles mecanismos a través de los cuales se concretaría la pretensión de ordenación del territorio. No obstante sus ventajas, particularmente la prioridad de estos territorios para la atracción de inversión pública, se critica la primacía de otros intereses sobre el interés turístico y no solucionar los problemas endémicos de incoherencia y descoordinación del ordenamiento territorial chileno.
    Keywords Ordenamiento territorial ; planificación territorial ; coherencia y coordinación pública ; zonas de interés turístico ; Geography. Anthropology. Recreation ; G ; Geography (General) ; G1-922
    Language English
    Publishing date 2014-11-01T00:00:00Z
    Publisher Universidad Externado de Colombia
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Investigating Reaction Intermediates during the Seedless Growth of Gold Nanostars Using Electron Tomography.

    Choo, Priscilla / Arenas-Esteban, Daniel / Jung, Insub / Chang, Woo Je / Weiss, Emily A / Bals, Sara / Odom, Teri W

    ACS nano

    2022  Volume 16, Issue 3, Page(s) 4408–4414

    Abstract: Good's buffers can act both as nucleating and shape-directing agents during the synthesis of anisotropic gold nanostars (AuNS). Although different Good's buffers can produce AuNS shapes with branches that are oriented along specific crystallographic ... ...

    Abstract Good's buffers can act both as nucleating and shape-directing agents during the synthesis of anisotropic gold nanostars (AuNS). Although different Good's buffers can produce AuNS shapes with branches that are oriented along specific crystallographic directions, the mechanism is not fully understood. This paper reports how an analysis of the intermediate structures during AuNS synthesis from HEPES, EPPS, and MOPS Good's buffers can provide insight into the formation of seedless AuNS. Electron tomography of AuNS structures quenched at early times (minutes) was used to characterize the morphology of the incipient seeds, and later times were used to construct the growth maps. Through this approach, we identified how the crystallinity and shape of the first structures synthesized with different Good's buffers determine the final AuNS morphologies.
    MeSH term(s) Buffers ; Electron Microscope Tomography ; Gold/chemistry ; HEPES/chemistry
    Chemical Substances Buffers ; Gold (7440-57-5) ; HEPES (RWW266YE9I)
    Language English
    Publishing date 2022-03-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.1c10669
    Database MEDical Literature Analysis and Retrieval System OnLINE

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