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Avian sibling cannibalism: Hoopoe mothers regularly use their last hatched nestlings to feed older siblings

Zoological Research 2022年第2期43卷 265-274页

作者： juan joseSoler Manuel Martin-Vivaldi Sona Nuhlickova Cristina Ruiz-Castellano Monica Mazorra-alonso Ester Martinez-Renau Manfred Eckenfellner jan Svetlik Herbert Hoi Departamento de Ecologia Funcional y Evolutiva Estacion Experimental de Zonas Aridas(EEZA-CSIC)Almeria E-04120Spain Unidad Asociada Coevolucion:Cucos Hospedadores y Bacterias SimbiontesUniversidad de GranadaGranada E-18003Spain Departamento de Zoologia Facultad de CienciasUniversidad de GranadaGranada E-18003Spain Department of Ecology Faculty of Natural SciencesComenius UniversityBratislava SK-84215Slovakia Konrad Lorenz Institute of Ethology Department of Interdisciplinary Life SciencesUniversity of Veterinary MedicineVienna A-1160Austria

Sibling cannibalism is relatively common in nature,but its evolution in birds and certain other vertebrates with extended parental care had been ***,however,we demonstrate its regular occurrence in two European populations of the Eurasian hoopoe(Upupa epops)and explore possible adaptive and non-adaptive *** showed that sibling cannibalism was more frequently detected in Spain(51.7%)than in Austria(5.9%).In these two populations,the hoopoes laid similar clutch sizes,resulting in similar fledging production,but hatching failures were more frequent in the northern ***,having more nestlings condemned to die in the southern population may explain the higher incidence of sibling *** accordance with this interpretation,hatching span and failure,but not breeding date,explained the probability of sibling cannibalism in the Spanish hoopoes,while all three variables predicted brood reduction ***,experimental food supply reduced the probability of sibling cannibalism,but not the intensity of brood ***,females allocated fewer resources to the smallest nestlings when they were going to starve,but not necessarily when they were going to be used as food for their *** results suggest that hoopoes produce extra eggs that,in the case of reduced hatching failure and food scarcity,produce nestlings that are used to feed older *** findings provide the first evidence that sibling cannibalism occurs regularly in a bird species,thus expanding our evolutionary understanding of clutch size,hatching asynchrony,parent-offspring conflict,infanticide,and sibling cannibalism in the animal kingdom.

关键词： Brood reduction Clutch size Hatching asynchrony Ice-box hypothesis Infanticide Siblicide Sibling hierarchy Upupa epops

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Micromechanical investigation of granular ratcheting using a discrete model of polygonal particles

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Particuology 2008年第6期6卷 390-403页

作者： Fernando alonso-Marroquín Hans B. Mhlhaus Hans j. Herrmann Earth Systems Science Computational Centre & School of Physical Sciences The University of Queensland Earth Systems Science Computational Centre The University of Queensland Institut fr Baustoffe ETH-HenggerbergZrich

We use a two-dimensional model of polygonal particles to investigate granular ratcheting. Ratcheting is a long-term response of granular materials under cyclic loading, where the same amount of permanent deformation is accumulated after each cycle. We report on ratcheting for low frequencies and extremely small loading amplitudes. The evolution of the sub-network of sliding contacts allows us to understand the micromechanics of ratcheting. We show that the contact network evolves almost periodically under cyclic loading as the sub-network of the sliding contacts reaches different stages of anisotropy in each cycle. Sliding contacts lead to a monotonic accumulation of permanent deformation per cycle in each particle. The distribution of these deformations appears to be correlated in form of vortices inside the granular assembly.

关键词： Granular systems Dynamics and kinematics of rigid bodies Molecular dynamics methods

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Maschke Type Theorems for Weak Hopf Quasigroups

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Algebra Colloquium 2020年第2期27卷 213-230页

作者： j.N.alonso Alvarez j.M.Fernández Vilaboa R.González Rodríguez Departamento de Matematicas Vniversidade de Vigo Campus Universitario Lagoas-MarcosendeE-36280 VigoSpain Departamento de Matematicas Universidade de Santiago de Compostela E-15771 Santiago de CompostelaSpain Departamento de Matematica Aplicada II Universidade de Vigo Campus Universitario Lagoas-MarcosendeE-36310 VigoSpain

In this paper we give necessary and sufficient conditions for a comodule magma over a weak Hopf quasigroup to have a total integral,thus extending the theories developed in the Hopf algebra,weak Hopf algebra and non-associative Hopf algebra *** this result we also deduce a version of Maschke’s theorems for right(H,B)-Hopf triples associated to a weak Hopf quasigroup H and a right H-comodule magma B.

关键词： (weak)Hopf algebra (weak)Hopf quasigroup integral Maschke theorem

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Soil carbon characterization along the profile of two forest soils under Quercus pyrenaica

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journal of Forestry Research 2020年第2期31卷 591-600页

作者： A.P.Fernandez-Getino j.L.alonso-Prados M.I.Santin-Montanya UPF-DTEVPF Instituto Nacional de Investigacion y Tecnologia Agraria y AlimentariaINIACtra.A Corunakm 7.528040 MadridSpain Dpto.Proteccion Vegetal Instituto Nacional de Investigacion y Tecnologia Agraria y AlimentariaINIACtra.A Corun akm 7.528040 MadridSpain

In light of concerns over climate change and increasing levels of CO2 in the atmosphere,it is of importance to investigate soil organic matter in Mediterranean forests at a profile ***-depth studies of the organic fraction are also of interest to improve understanding of carbon balance and to facilitate modelling of carbon fixation in forest *** research evaluates the relationships between diverse parameters such as colour,content,and form of soil organic matter(SOM).Two Quercus pyrenica ecosystems with soils classified as inceptisols with a xeric or dry moisture regime,and developed under a Mediterranean climate in Spain,were used to characterize SOM through the complete sequence of layers of the soil *** differentiating factor between the two ecosystems was slope *** was done using characteristics of humic substances(HS)as indicators of SOM turnover in *** analysis was used to further characterize the humic *** soil colour measurements are a tool for soil type classification and soil organic carbon prediction,the relation between HS colour measured by reflection and by transmission was determined in order to establish a relationship between measurement *** analysis and colour provided evidence of a different level of stabilization of HS from both soils,and between the different *** of humic acids was found to be greater in deeper horizons than in the surface *** inverse relationship between HS colour measured by reflection and by transmission was *** soils showed a clear trend in which horizons presenting lower absorbance numbers showed higher figures of hue and value.A more marked accumulation of humified compounds was found in pedons,(the smallest unit or volume of soil that contains all the soil types),in the less steep *** might be explained in terms of the physiographic position affecting infiltration behavior and exposure to runoff.

关键词： Organic matter turnover Colour humic substance(HS)by reflection Colour HS by transmission Humification index Mediterranean Quercus species

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Strong Connections and Invertible Weak Entwining Structures

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Acta Mathematica Sinica,English Series 2012年第7期28卷 1443-1460页

作者： j. N. alonso LVAREZ j. M. FERN NDEZ VILABOA GONZ LEZ RODR íGUEZ Departamento de Matemáticas Universidad de VigoCampus Universitario Lagoas-Marcosende Departamento de lxebra Universidad de Santiago de Compostela Departamento de Matemática Aplicada Ⅱ Universidad de VigoCampus Universitario Lagoas-Marcosende

In this paper we obtain a criterion under which the bijectivity of the canonical morphism of a weak Galois extension associated to a weak invertible entwining structure is equivalent to the existence of a strong connection form. Also we obtain an explicit formula for a strong connection under equivariant projective conditions or under coseparability conditions.

关键词： Monoidal category invertible weak entwining structure strong connection weak Galois extension

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Molecular Mechanisms of Ethylene-Auxin Interaction

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Molecular Plant 2013年第6期6卷 1734-1737页

作者： Linda Robles Anna Stepanova jose alonso Department of Plant and Microbial Biology North Carolina State University Raleigh NC 27695 USA

During the century-long history of plant hormone research, the focus in this area has shifted from the original physi- ological experiments to molecular, genetic, biochemical, and, more recently, genomic approaches. During this jour- ney, we have learned about the many effects these natural compounds have on plant growth and development at the morphological and molecular levels. We have also uncov- ered how these molecules are sensed by the plant cell and how they trigger signaling cascades that relay information to the nucleus, ultimately culminating in a transcriptional cas- cade. With this fundamental knowledge at hand, the main efforts in the field have turned towards a more integrative systems approach, in which the function of a hormone is considered in the context of the complex and dynamic net of interactions with other hormones or, more broadly, with other developmental and environmental signals. Initially, due to the complexity of the problem, most crosstalk studies have focused on pairwise interactions between two or few hormones. Special attention has been given to the interac- tions between ethylene and auxin, perhaps in part because of the experimental tractability of some of the processes in which the interaction between these two hormones is most manifested. An excellent review has been recently written describing the many different processes in which these two hormones are known to interact, either synergistically, such as root growth inhibition, or antagonistically, as is the case for lateral root formation （Muday et al., 2012）. Rather than following this process-centered approach, herein we decided to focus on the molecular mechanisms involved in the inter- action between ethylene and auxin. We take a closer look at the best-known transcriptional and posttranscriptional points of interaction, as well as revisit the most recent experimental findings that suggested additional levels of ethylene-auxin crosstalk.

关键词： Ethylene Auxin Interaction

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A Maschke Type Theorem for Weak Hopf Algebras

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Acta Mathematica Sinica,English Series 2008年第12期24卷 2065-2080页

作者： j.N.alonsoLVAREZ j.M.FERNNDEZVILABOA R.GONZLEZRODRíGUEZ A.B.RODRíGUEZRAPOSO Departamento de Matemáticas Universidad de Vigo. Lagoas-Marcosende Vigo. E-36200 Spain Departamento de lxebra. Universidad de Santiago de Compostela Santiago de Compostela. E-15771 Spain Departamento de Matemdtica Aplicada Ⅱ. Universidad de Vigo. Lagoas-Marcosende Vigo. E-36310 Spain Departamento delxebra Universidad de Santiago de CompostelaSantiago de Compostela E-15771 Spain

In this paper, we give a necessary and sufficient condition for a comodule algebra over a weak Hopf algebra to have a total integral, thus extending the classical theory developed by Doi in the Hopf algebra setting. Also, from these results, we deduce a version of Maschke＇s Theorem for （H, B）-Hopf modules associated with a weak Hopf algebra H and a right H-comodule algebra B.

关键词： Monoidal category weak Hopf algebra Hopf modules Maschke Theorem

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CALLISTO facilities in Peru:spectrometer commissioning and observations of typeⅢsolar radio bursts

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Research in Astronomy and Astrophysics 2021年第6期21卷 329-336页

作者： javier alonso Rengifo Veronica Loaiza-Tacuri jose Bazo Walter Robert Guevara Day Seccion FIsica Departamento de CienciasPontificia Universidad Catolica del PeruAv.Universitaria 1801Lima 32Peru Direction de Astroflsica Comision National de Investigacion y Desarrollo AeroespacialCONIDALuis Felipe Villaran 1069LimaPeru Observatorio National Rua General Jose Cristino7720921-400 Sao CristovaoRio de JaneiroRJBrazil Facultad de Ciencias Ffsicas Universidad Nacional Mayor de San MarcosP.O.Box 14-149Lima 14Peru

The Astrophysics Directorate of CONIDA has installed two radio spectrometer stations belonging to the e-CALLISTO network in Lima,*** their strategic location near the Equator,it is possible to observe the Sun evenly throughout the whole *** receiver located at Pucusana,nearby the capital city of Lima,took data from October 2014 until August 2016 in the metric and decimetric bands looking for radio *** this period,this e-CALLISTO detector was unique in its time-zone *** asses the suitability of the sites and the performance of the antennas,we analyzed the radio ambient background and measured their radiation pattern and *** demonstrate the capabilities of the facilities for studying solar dynamics in these radio frequencies,we have selected and analyzed typeⅢSolar Radio *** study of this kind of burst helps to understand the electron beams traversing the solar corona and the solar atmospheric *** have characterized the most common radio bursts with the following mean values:a negative drift rate of-25.8±3.7 MHz s^(-1),a duration of 2.6±0.3 s and 35 MHz bandwidth in the frequency range of 114 to 174 *** addition,for some events,it was possible to calculate a global frequency drift which on average was 0.4±0.1 MHz s^(-1).

关键词： instrumentation:spectrographs Sun:radio radiation

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Design,synthesis and performance of Ba-doped derivatives of SrMo_(0.9)Fe_(0.1)O_(3-δ)perovskite as anode materials in SOFCs

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journal of Materiomics 2019年第2期5卷 280-285页

作者： S.Sydyknazar V.Cascos M.T.Fernandez-Diaz j.A.alonso Instituto de Ciencia de Materiales de Madrid C.S.I.C.CantoblancoE-28049MadridSpain Institut Laue Langevin BP 156XGrenobleF-38042France

The oxides SrMo_(1-x)Fe_(x)O_(3-δ)(x=0.1 and 0.2)have recently been described as excellent anode materials for solid-oxide fuel cells at intermediate temperatures(IT-SOFC)with LSGM as the *** this work we have partially replaced Sr by Ba in a compound of formula Sr_(0.9)Ba_(0.1)Mo_(0.9)Fe_(0.1)O_(3-δ),in order to expand the unit-cell size and thereby improve the ionic diffusion of O^(2-)ions through the crystal *** anode materials must be stable under reducing conditions,since they work in the presence of the fuel(H_(2))at elevated *** anodes are inspired in the SrMoO_(3)perovskite,which contains Mo4+ions,stable in very reducing *** novel oxide has been structurally characterized from x-ray(XRD)and neutron powder diffraction(NPD)data;the structure is defined at room temperature in the Pm-3m space group,and shows oxygen vacancies,necessary for the performance of this material as mixed ionic-electronic(MIEC)*** single test cells supported on LSGM,the materials generated output powers close to 500 mW/cm^(2)at 850℃using pure H_(2)as *** thermal expansion is linear,with TEC=10.93×10^(-6)K^(-1).The chemical compatibility with the LSGM electrolyte was also verified.

关键词： IT-SOFC Anode Perovskite Neutron diffraction SrMoO_(3)

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Multiphase modeling of fluid dynamic in ladle steel operations under non-isothermal conditions

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journal of Iron and Steel Research(International) 2017年第9期24卷 888-900页

作者： H.Gonzalez j.A.Ramos-Banderas E.Torres-alonso G.Solorio-Diaz C.A.Hernández-Bocanegra Graduate Program in Metallurgy Morelia Technological Institute(ITM)Morelia Michoacdn 58120Mexico Graduate Program in Engineering Mechanical UMSNHMorelia Michoacdn 58140Mexico CATEDRAS CONACyT Benito JuarezCDMX 03940Mexico

A numerical simulation was performed to study the flow pattern,mixing time and open-eye slag produced by argon gas injection in an industrial scale steel ladle under non-isothermal *** liquid steel remains 5min before the injection,and thermal stratification and convective flows were *** different sequences in stages employing various argon-gas flow rates were *** the first case,a sequence with the highest flow rates of argon was applied,while in the second and the third sequences,the intermediate and the lowest flow rates of argon gas were used,*** determining the chemistry homogenization,the mixing time was computed and analyzed in all three *** was found that the cold steel is located near the walls while the steel with a high temperature is accumulated in the center of the ladle above the argon-gas *** higher and lower flows promote a faster chemistry homogenization owing to the secondary recirculations that are developed closer to the *** results from steel temperature drop show a good concordance with plant trial measurements.

关键词： Thermal stratification Mixing time Open-eye slag Ladle steelmaking Multiphase modeling

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