105 research outputs found

    The consequences of craniofacial integration for the adaptive radiations of Darwin’s finches and Hawaiian honeycreepers

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    © 2020, The Author(s), under exclusive licence to Springer Nature Limited. The diversifications of Darwin’s finches and Hawaiian honeycreepers are two text-book examples of adaptive radiation in birds. Why these two bird groups radiated while the remaining endemic birds in these two archipelagos exhibit relatively low diversity and disparity remains unexplained. Ecological factors have failed to provide a convincing answer to this phenomenon, and some intrinsic causes connected to craniofacial evolution have been hypothesized. The tight coevolution of the beak and the remainder of the skull in diurnal raptors and parrots suggests that integration may be the prevalent condition in landbirds (Inopinaves). This is in contrast with the archetypal relationship between beak shape and ecology in Darwin’s finches and Hawaiian honeycreepers, which suggests that the beak can adapt as a distinct module in these birds. Modularity has therefore been proposed to underpin the adaptive radiation of these groups, allowing the beak to evolve more rapidly and freely in response to ecological opportunity. Here, using geometric morphometrics and phylogenetic comparative methods in a broad sample of landbird skulls, we show that craniofacial evolution in Darwin’s finches and Hawaiian honeycreepers seems to be characterized by a tighter coevolution of the beak and the rest of the skull (cranial integration) than in most landbird lineages, with rapid and extreme morphological evolution of both skull regions along constrained directions of phenotypic space. These patterns are unique among landbirds, including other sympatric island radiations, and therefore counter previous hypotheses by showing that tighter cranial integration, not only modularity, can facilitate evolution along adaptive directions

    A Semiconducting Bi2O2(C4O4) Coordination Polymer Showing a Photoelectric Response

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    This document is the Accepted Manuscript version of a Published Work that appeared in final form in Inorganic Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.inorgchem.9b03290.[EN] Inorganic semiconductors are extensively considered to be among the most promising materials to convert solar light into electricity or chemical energy owing to their efficiency in the separation of photoinduced electron/hole. Bismuth oxides, and, in particular, those built up of [Bi2O2](2+) layers, show an efficient charge separation and, thus, high photocatalytic activities. To explore a possible synergetic effect of bismuth metallic nodes combined with the electron-rich linker squarate, Bi2O2(C4O4) or IEF-3 (an IMDEA Energy framework) was hydrothermally prepared and adequately characterized. As determined from the X-ray structure, [Bi2O2](2+) layers are interconnected by squarate ligands, having a pronounced effect of the 6s(2) lone pair on the bismuth local environment. IEF-3 shows high thermal and chemical robustness at industrially relevant model aggressive media. A large panel of physicochemical methods were applied to recognize IEF-3 as an UV-absorbing n-type semiconductor, showing a photocurrent response comparable to that of alpha-Bi2O3, offering further possibilities for tuning its electrochemical properties by modifying the ligand. In this way, the well-known compositional and structural versatility of coordination polymers may be applied in the future to fine-tune metal-organic semiconductor systems.The authors acknowledge Ra-Phuel (Grant ENE2016-79608-C2-1-R), Ramon y Cajal Grant RYC-2014-15039 (Ministerio de Ciencia, Investigacion y Universidades), and Fundacion Ramon Areces (H + MOFs) for financial support. S.N. is thankful for financial support by the Fundacion Ramon Areces (XVIII Concurso Nacional para la Adjudicacion de Ayudas a la Investigacion en Ciencias de la Vida y de la Materia, 2016), Ministerio de Ciencia, Innovacion y Universidades project (Project RTI2018-099482-A-I00), and Generalitat Valenciana grupos de investigacion consolidables 2019 (ref: AICO/2019/214) project. H.G. is thankful for financial support by the Spanish Ministry of Science and Innovation (Severo Ochoa SEV2016 and RTI2018-890237-CO2-1), and Generalitat Valenciana (Prometeo 2017/083) is also gratefully acknowledged.Babaryk, AA.; Contreras Almengor, OR.; Cabrero-Antonino, M.; Navalón Oltra, S.; García Gómez, H.; Horcajada, P. (2020). A Semiconducting Bi2O2(C4O4) Coordination Polymer Showing a Photoelectric Response. Inorganic Chemistry. 59(6):3406-3416. https://doi.org/10.1021/acs.inorgchem.9b03290S34063416596Lund, H. (2007). Renewable energy strategies for sustainable development. 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A Bismuth-Based Metal-Organic Framework as an Efficient Visible-Light-Driven Photocatalyst. Chemistry - A European Journal, 21(6), 2364-2367. doi:10.1002/chem.201405047Wang, G., Liu, Y., Huang, B., Qin, X., Zhang, X., & Dai, Y. (2015). A novel metal–organic framework based on bismuth and trimesic acid: synthesis, structure and properties. Dalton Transactions, 44(37), 16238-16241. doi:10.1039/c5dt03111gWang, Y., Takki, S., Cheung, O., Xu, H., Wan, W., Öhrström, L., & Inge, A. K. (2017). Elucidation of the elusive structure and formula of the active pharmaceutical ingredient bismuth subgallate by continuous rotation electron diffraction. Chemical Communications, 53(52), 7018-7021. doi:10.1039/c7cc03180gKöppen, M., Dhakshinamoorthy, A., Inge, A. K., Cheung, O., Ångström, J., Mayer, P., & Stock, N. (2018). Synthesis, Transformation, Catalysis, and Gas Sorption Investigations on the Bismuth Metal-Organic Framework CAU-17. European Journal of Inorganic Chemistry, 2018(30), 3496-3503. doi:10.1002/ejic.201800321Gándara, F., Gómez-Lor, B., Iglesias, M., Snejko, N., Gutiérrez-Puebla, E., & Monge, A. (2009). A new scandium metal organic framework built up from octadecasil zeolitic cages as heterogeneous catalyst. Chemical Communications, (17), 2393. doi:10.1039/b900841aGoswami, S., Adhikary, A., Jena, H. S., Biswas, S., & Konar, S. (2013). A 3D Iron(II)-Based MOF with Squashed Cuboctahedral Nanoscopic Cages Showing Spin-Canted Long-Range Antiferromagnetic Ordering. Inorganic Chemistry, 52(20), 12064-12069. doi:10.1021/ic401886fUsov, P. M., Keene, T. D., & D’Alessandro, D. M. (2013). A Comparative Study of the Structural, Optical, and Electrochemical Properties of Squarate-Based Coordination Frameworks. Australian Journal of Chemistry, 66(4), 429. doi:10.1071/ch12474Liu, Z., Lin, K., Ren, Y., Kato, K., Cao, Y., Deng, J., … Xing, X. (2019). Inorganic–organic hybridization induced uniaxial zero thermal expansion in MC4O4 (M = Ba, Pb). Chemical Communications, 55(28), 4107-4110. doi:10.1039/c9cc00226jAllen, L. C. (1989). Electronegativity is the average one-electron energy of the valence-shell electrons in ground-state free atoms. Journal of the American Chemical Society, 111(25), 9003-9014. doi:10.1021/ja00207a003Goswami, S., Jena, H. S., & Konar, S. (2014). Study of Heterogeneous Catalysis by Iron-Squarate based 3D Metal Organic Framework for the Transformation of Tetrazines to Oxadiazole derivatives. Inorganic Chemistry, 53(14), 7071-7073. doi:10.1021/ic5003258Lin, R.-B., Li, L., Zhou, H.-L., Wu, H., He, C., Li, S., … Chen, B. (2018). Molecular sieving of ethylene from ethane using a rigid metal–organic framework. Nature Materials, 17(12), 1128-1133. doi:10.1038/s41563-018-0206-2Li, L., Guo, L., Zhang, Z., Yang, Q., Yang, Y., Bao, Z., … Li, J. (2019). A Robust Squarate-Based Metal–Organic Framework Demonstrates Record-High Affinity and Selectivity for Xenon over Krypton. Journal of the American Chemical Society, 141(23), 9358-9364. doi:10.1021/jacs.9b03422Wang, Ke, Feng, Ho, Chang, Chuang, & Lee. (2019). Synthesis, Structural Characterization and Ligand-Enhanced Photo-Induced Color-Changing Behavior of Two Hydrogen-Bonded Ho(III)-Squarate Supramolecular Compounds. Polymers, 11(8), 1369. doi:10.3390/polym11081369Boultif, A., & Louër, D. (2004). Powder pattern indexing with the dichotomy method. Journal of Applied Crystallography, 37(5), 724-731. doi:10.1107/s0021889804014876De Wolff, P. M. (1968). A simplified criterion for the reliability of a powder pattern indexing. Journal of Applied Crystallography, 1(2), 108-113. doi:10.1107/s002188986800508xAltomare, A., Cuocci, C., Giacovazzo, C., Moliterni, A., Rizzi, R., Corriero, N., & Falcicchio, A. (2013). EXPO2013: a kit of tools for phasing crystal structures from powder data. 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    Craniofacial development illuminates the evolution of nightbirds (Strisores)

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    Evolutionary variation in ontogeny played a central role in the origin of the avian skull. However, its influence in subsequent bird evolution is largely unexplored. We assess the links between ontogenetic and evolutionary variation of skull morphology in Strisores (nightbirds). Nightbirds span an exceptional range of ecologies, sizes, life-history traits and craniofacial morphologies constituting an ideal test for evo-devo hypotheses of avian craniofacial evolution. These morphologies include superficially 'juvenile-like' broad, flat skulls with short rostra and large orbits in swifts, nightjars and allied lineages, and the elongate, narrow rostra and globular skulls of hummingbirds. Here, we show that nightbird skulls undergo large ontogenetic shape changes that differ strongly from widespread avian patterns. While the superficially juvenile-like skull morphology of many adult nightbirds results from convergent evolution, rather than paedomorphosis, the divergent cranial morphology of hummingbirds originates from an evolutionary reversal to a more typical avian ontogenetic trajectory combined with accelerated ontogenetic shape change. Our findings underscore the evolutionary lability of cranial growth and development in birds, and the underappreciated role of this aspect of phenotypic variability in the macroevolutionary diversification of the amniote skull

    Trajectory of post-COVID brain fog, memory loss, and concentration loss in previously hospitalized COVID-19 survivors:the LONG-COVID-EXP multicenter study

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    OBJECTIVE: This study aimed to apply Sankey plots and exponential bar plots for visualizing the trajectory of post-COVID brain fog, memory loss, and concentration loss in a cohort of previously hospitalized COVID-19 survivors.METHODS: A sample of 1,266 previously hospitalized patients due to COVID-19 during the first wave of the pandemic were assessed at 8.4 (T1), 13.2 (T2), and 18.3 (T3) months after hospital discharge. They were asked about the presence of the following self-reported cognitive symptoms: brain fog (defined as self-perception of sluggish or fuzzy thinking), memory loss (defined as self-perception of unusual forgetfulness), and concentration loss (defined as self-perception of not being able to maintain attention). We asked about symptoms that individuals had not experienced previously, and they attributed them to the acute infection. Clinical and hospitalization data were collected from hospital medical records.RESULTS: The Sankey plots revealed that the prevalence of post-COVID brain fog was 8.37% (n = 106) at T1, 4.7% (n = 60) at T2, and 5.1% (n = 65) at T3, whereas the prevalence of post-COVID memory loss was 14.9% (n = 189) at T1, 11.4% (n = 145) at T2, and 12.12% (n = 154) at T3. Finally, the prevalence of post-COVID concentration loss decreased from 6.86% (n = 87) at T1, to 4.78% (n = 60) at T2, and to 2.63% (n = 33) at T3. The recovery exponential curves show a decreasing trend, indicating that these post-COVID cognitive symptoms recovered in the following years after discharge. The regression models did not reveal any medical record data associated with post-COVID brain fog, memory loss, or concentration loss in the long term.CONCLUSION: The use of Sankey plots shows a fluctuating evolution of post-COVID brain fog, memory loss, or concentration loss during the first years after the infection. In addition, exponential bar plots revealed a decrease in the prevalence of these symptoms during the first years after hospital discharge. No risk factors were identified in this cohort.</p

    A Novel Porous Ti-Squarate as Efficient Photocatalyst in the Overall Water Splitting Reaction under Simulated Sunlight Irradiation

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    [EN] A new porous titanium(IV) squarate metal¿organic framework (MOF), denoted as IEF-11, having a never reported titanium secondary building unit, is successfully synthesized and fully characterized. IEF-11 not only exhibits a permanent porosity but also an outstanding chemical stability. Further, as a consequence of combining the photoactive Ti(IV) and the electroactive squarate, IEF-11 presents relevant optoelectronic properties, applied here to the photocatalytic overall water splitting reaction. Remarkably, IEF-11 as a photocatalyst is able to produce record H2 amounts for MOF-based materials under simulated sunlight (up to 672 µmol gcatalyst in 22 h) without any activity loss during at least 10 d.P.S.-A. and A.A.B. contributed equally to this work. The authors acknowledge the Ramón Areces Foundation project H+MOFs, the M-ERA-NET C-MOF-cell (grant PCI2020-111998 funded by MCIN/AEI/10.13039/501100011033 and European Union NextGenerationEU/ PRTR) project, and Retos Investigación MOFSEIDON (grant PID2019-104228RB-I00 funded by MCIN/AEI/10.13039/501100011033) project. S.N. thanks financial support by Ministerio de Ciencia, Innovatión y Universidades RTI2018-099482-A-I00 project and Agència Valenciana de la Innovació (AVI, INNEST/2020/111) project. H.G. thanks financial support to the Spanish Ministry of Science and Innovation (Severo Ochoa and RTI2018-098237-CO21) and Generalitat Valenciana (Prometeo2017/083). T.W. acknowledges financial support from the Swedish Research Council (VR, 2019-05465). Parts of this research were carried out at ¿CRISTAL¿ at SOLEIL. P.S. and A.A.B. sincerely thank to the project CALIPSOplus under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020 for the support of the synchrotron experiment.Salcedo-Abraira, P.; Babaryk, AA.; Montero-Lanzuela, E.; Contreras Almengor, OR.; Cabrero-Antonino, M.; Svensson, E.; Willhammar, T.... (2021). A Novel Porous Ti-Squarate as Efficient Photocatalyst in the Overall Water Splitting Reaction under Simulated Sunlight Irradiation. Advanced Materials. 33(52):1-9. https://doi.org/10.1002/adma.20210662719335

    A Novel Porous Ti-Squarate as Efficient Photocatalyst in the Overall Water Splitting Reaction under Simulated Sunlight Irradiation

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    A new porous titanium(IV) squarate metal–organic framework (MOF), denoted as IEF-11, having a never reported titanium secondary building unit, is successfully synthesized and fully characterized. IEF-11 not only exhibits a permanent porosity but also an outstanding chemical stability. Further, as a consequence of combining the photoactive Ti(IV) and the electroactive squarate, IEF-11 presents relevant optoelectronic properties, applied here to the photocatalytic overall water splitting reaction. Remarkably, IEF-11 as a photocatalyst is able to produce record H amounts for MOF-based materials under simulated sunlight (up to 672 µmol g in 22 h) without any activity loss during at least 10 d.P.S.-A. and A.A.B. contributed equally to this work. The authors acknowledge the Ramón Areces Foundation project H+MOFs, the M-ERA-NET C-MOF-cell (grant PCI2020-111998 funded by MCIN/AEI /10.13039/501100011033 and European Union NextGenerationEU/PRTR) project, and Retos Investigación MOFSEIDON (grant PID2019-104228RB-I00 funded by MCIN/AEI/10.13039/501100011033) project. S.N. thanks financial support by Ministerio de Ciencia, Innovatión y Universidades RTI2018-099482-A-I00 project and Agència Valenciana de la Innovació (AVI, INNEST/2020/111) project. H.G. thanks financial support to the Spanish Ministry of Science and Innovation (Severo Ochoa and RTI2018-098237-CO21) and Generalitat Valenciana (Prometeo2017/083). T.W. acknowledges financial support from the Swedish Research Council (VR, 2019-05465). Parts of this research were carried out at “CRISTAL” at SOLEIL. P.S. and A.A.B. sincerely thank to the project CALIPSOplus under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020 for the support of the synchrotron experiment

    Monitorización de los niveles de inmisión de COVs en el aire ambiente de la Isla de Tenerife

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    Ponencia presentada en: 1er Encuentro sobre Meteorología y Atmósfera de Canarias, celebrado en el Puerto de la Cruz, los días 12,13 y 14 de noviembre de 2003. El encuentro estuvo organizado por el Centro Meteorológico Territorial en Canarias Occidental, con la colaboración del Observatorio Atmosférico de Izaña y del Grupo de Física de la Atmósfera de la Facultad de Física (Universidad de La Laguna

    Aplicación y uso de la espectrometría de infrarrojo de campo abierto (OP-FTIR) para la monitorización de contaminantes atmosféricos

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    Ponencia presentada en: 1er Encuentro sobre Meteorología y Atmósfera de Canarias, celebrado en el Puerto de la Cruz, los días 12,13 y 14 de noviembre de 2003. El encuentro estuvo organizado por el Centro Meteorológico Territorial en Canarias Occidental, con la colaboración del Observatorio Atmosférico de Izaña y del Grupo de Física de la Atmósfera de la Facultad de Física (Universidad de La Laguna)La espectroscopia de absorción infrarroja de campo abierto (OP-FTIR) se ha aplicado en los últimos años en la medida de componentes traza y contaminantes en la atmósfera procedentes tanto de fuentes naturales como antropogénicas. Con la finalidad de evaluar la emisión de gases contaminantes asociada tanto a la producción de biogas por vertederos como al tráfico rodado, en Julio de 2003 se realizó un estudio preliminar consistente en la medida tanto espectral como radiométrica de gases en el ambiente atmosférico del vertedero de Arico y de la autopista Norte Santa Cruz-La Laguna, en Tenerife. Los resultados reflejaron valores medios de metano (CH4), monóxido de carbono (CO) y acetileno (C2H2) superiores a los estimados para la troposfera, indicando que tanto los vertederos como el tráfico rodado son importantes fuentes de contaminación atmosférica en la isla de Tenerife
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