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Reproductive patterns in Araucaria araucana forests in the Andean range, Chile

Ecological Processes 2024年第1期13卷 252-261页

作者： Sergio Donoso Karen Pe?a-Rojas claudia espinoza Carolain Badaracco Rómulo Santelices-Moya Antonio Cabrera-Ariza Mediterranean Forests Laboratory Faculty of Forestry and Nature Conservation Centro Secano Faculty of Agricultural and Forestry Sciences Universidad Católica del Maule Maule Advanced Studies Research Center Vice-Rector's Office for Research and Postgraduate Studies Catholic University of Maule

Background Araucaria araucana is a mast species that presents a high variability in annual cone production. Researchers have recorded synchronization events in cone production in different populations, which allows the seed production to be concentrated, reducing the percentage of seeds consumed by different animal *** We sampled three populations located in the Andes Mountains, Araucanía Region, Chile. In 2004 we began the collection of data on cone production, for which we installed permanent plots（1200 m2each） at each location. We identified and labeled each female tree in each plot to monitor its cone production. In 2012 we selected a total of 30 trees near the plots to evaluate the number of seeds per cone. In each February from 2012 to 2014 we selected two mature cones and covered them with a porous mesh for subsequent collection and storage in March. At the beginning of June, we counted and weighed the seeds, determining the average weight, the number of seeds per cone, the germination capacity（GC）, and the germination speed（GS）.Results Cone production was synchronous across the three locations. We observed significant differences among the locations and years evaluated. The cones had fewer seeds in 2013（high production） compared to those in 2012（low production）, but their weights were similar. In 2014 the cones produced smaller seeds in fewer quantities. The difference between the years 2013 and 2014 resulted from the high-energy expenditure in 2013. Regarding GC and GS, there were significant differences among the three locations（GC: F = 45.41, p < 0.01; GS: F = 96.08, p < 0.01）, where the highest values were observed in *** Both GC and GS are related to seed weight but not to the number of cones produced in a given year. These annual fluctuations in seed production are determining factors in the population dynamics of forest species. Our results allow a better understanding of the reproductive phenology of A. araucana and could hel

关键词： Seed weight Germination potential Masting species Sustainable use Dioecious species

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A Cross-Cultural Comparison of the Providing-Receiving Social Supports in Sports Teams--Japanese and American Student＇s Athletes

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Journal of Sports Science 2016年第4期4卷 210-218页

作者： Goichi Hagiwara Lance G. Bryant claudia Benavides espinoza Hirohisa Isogai Department of Sports Humanities and Applied Social Science National Institute of Fitness and Sports in Kanoya Kanoya-shiKagosima 893-2393 Japan Department of Health Education and Sport Sciences Arkansas State University Jonesboro AR 72401 USA Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology Kitakyushu Fukuoka 808-0196 Japan

The purposes of this study were to examine the relationships between providing and receiving social supports with teammates, and to clarify the particularities of Japan, based on an examination of differences between Japan and the U.S. The subjects were 123 collegiate student＇s athletes from Japan and 115 from the United States. They participated organized sports activities in their universities （including intramural and varsity level）. The participants completed questionnaires measuring the providing and receiving social supports for sports participation and persistency. Providing and Receiving Social Support Scale for Sports Team （Hagiwara and Isogai, 2014） were adopted to investigate the amount of social supports with teammates in a sports team. The results of correlations in providing and receiving social supports demonstrated that the amount of providing social support for teammates related to the amount of receiving social support from teammates in both Japanese and American student＇s athletes. The results of comparison Japan and the U.S. indicated that American student＇s athletes provided more social supports for teammates than Japanese. The present findings might be an important material to better understand Japanese student＇s athletes.

关键词： Social support sports team collegiate sports providing support.

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Olfactory receptors in neural regeneration in the central nervous system

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Neural Regeneration Research 2025年第9期20卷 2480-2494页

作者： Rafael Franco claudia Garrigós Toni Capó Joan Serrano-Marín Rafael Rivas-Santisteban Jaume Lillo Molecular Neurobiology Laboratory Department of Biochemistry and Molecular BiomedicineFacultat de BiologiaUniversitat de BarcelonaBarcelonaSpain CiberNed Network Center for Biomedical Research in Neurodegenerative Diseases Spanish National Health Institute Carlos ⅢMadridSpain School of Chemistry Universitat de BarcelonaBarcelonaSpain Department of Biochemistry and Physiology School of Pharmacy and Food SciencesUniversitat de BarcelonaBarcelonaSpain Laboratory of Computational Medicine Biostatistics UnitFaculty of MedicineAutonomous University of BarcelonaCampus BellaterraBarcelonaSpain

Olfactory receptors are crucial for detecting odors and play a vital role in our sense of smell,influencing behaviors from food choices to emotional *** receptors also contribute to our perception of flavor and have potential applications in medical diagnostics and environmental *** ability of the olfactory system to regenerate its sensory neurons provides a unique model to study neural regeneration,a phenomenon largely absent in the central nervous *** gained from how olfactory neurons continuously replace themselves and reestablish functional connections can provide strategies to promote similar regenerative processes in the central nervous system,where damage often results in permanent *** the molecular and cellular mechanisms underpinning olfactory neuron regeneration could pave the way for developing therapeutic approaches to treat spinal co rd injuries and neurodegenerative diseases like Alzheimer's *** ctory receptors are found in almost any cell of eve ry orga n/tissue of the mammalian *** ectopic expression provides insights into the chemical structures that can activate olfactory *** addition to odors,olfactory receptors in ectopic expression may respond to endogenous compounds and molecules produced by mucosal colonizing *** analysis of the function of olfactory receptors in ectopic expression provides valuable information on the signaling pathway engaged upon receptor activation and the receptor's role in proliferation and cell differentiation *** review explo res the ectopic expression of olfa ctory receptors and the role they may play in neural regeneration within the central nervous system,with particular attention to compounds that can activate these receptors to initiate regenerative *** suggests that olfactory receptors could serve as potential therapeutic targets for enhancing neural repair and recovery following central nervous syste

关键词： adenosine receptors adrenergic receptors ectopic expression G proteincoupled receptors glia neurons

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Crystal structure evolution of complex metal aluminum hydrides upon hydrogen release

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Journal of Energy Chemistry 2020年第3期29卷 133-143页

作者： claudia Weidenthaler Max-Planck-Institut für Kohlenforschung 45470 Mülheim an der RuhrGermany

Complex aluminum hydrides have been widely studied as potential hydrogen storage materials but also,for some time now, for electrochemical applications. This review summarizes the crystal structures of alkali and alkaline earth aluminum hydrides and correlates structure properties with physical and chemical properties of the hydride compounds. The crystal structures of the alkali metal aluminum hydrides change significantly during the stepwise dehydrogenation. The general pathway follows a transformation of structures built of isolated [AlH4]- tetrahedra to structures built of isolated [Al H6]3- *** crystal structure relations in the group of alkaline earth metal aluminum hydrides are much more complicated than those of the alkali metal aluminum hydrides. The structures of the alkaline earth metal aluminum hydrides consist of isolated tetrahedra but the intermediate structures exhibit chains of cornershared octahedra. The coordination numbers within the alkali metal group increase with cation sizes which goes along with an increase of the decomposition temperatures of the primary hydrides. Alkaline earth metal hydrides have higher coordination numbers but decompose at slightly lower temperatures than their alkali metal counterparts. The decomposition pathways of alkaline metal aluminum hydrides have not been studied in all cases and require future research.

关键词： Complex aluminum hydrides Hydrogen storage Crystal structure

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HOMOGENIZATION RESULTS FOR ENZYME CATALYZED REACTIONS THROUGH POROUS MEDIA

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Acta Mathematica Scientia 2009年第1期29卷 74-82页

作者： claudia Timofte Department of Mathematics Faculty of Physics University of BucharestP.O. Box MG-11

The aim of this article is to study the effective behavior of the solution of a nonlinear problem arising in the modelling of enzyme catalyzed reactions through the exterior of a domain containing periodically distributed reactive solid obstacles,with period ε.The asymptotic behavior of the solution of such a problem is governed by a new elliptic boundary-value problem,with an extra zero-order term that captures the effect of the enzymatic reactions.

关键词： Homogenization enzyme reactive flows Michaelis-Menten mechanism

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Adult mammalian neurogenesis and motivated behaviors

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Integrative Zoology 2018年第6期13卷 655-672页

作者： claudia JORGENSEN Behavioral Science Department Utah Valley UniversityOremUtahUSA

Adult neurogenesis continues to captivate the curiosity of the scientific community;and researchers seem to have a particular interest in identifying the functional implications of such *** the majority of research focuses on the association between adult neurogenesis and learning and memory(including spatial learning associated with hippocampal neurogenesis and olfactory discrimination associated with neurogenesis in the olfactory system),the following review will explore the link to motivated *** particular,goal-directed behaviors such as sociosexual,parental,aggressive,as well as depression-and anxiety-like behaviors and their reciprocal association to adult neurogenesis will be *** review will detail research in humans and other mammalian ***,the potential mechanisms underlying these neurogenic alterations will be ***,the review will conclude with a discussion on the functional significance of these newly generated cells in mediating goal-directed behaviors.

关键词： adult neurogenesis aggression anxiety depression reproduction

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Improving Scalability of Cloud Monitoring Through PCA-Based Clustering of Virtual Machines

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Journal of Computer Science & Technology 2014年第1期29卷 38-52页

作者： claudia Canali Riccardo Lancellotti IEEE Department of Information Engineering University of Modena and Reggio Emilia ACM

Cloud computing has recently emerged as a leading paradigm to allow customers to run their applications in virtualized large-scale data centers. Existing solutions for monitoring and management of these infrastructures consider virtual machines （VMs） as independent entities with their own characteristics. However, these approaches suffer from scalability issues due to the increasing number of VMs in modern cloud data centers. We claim that scalability issues can bc addressed by leveraging the similarity among VMs behavior in terms of resource usage patterns. In this paper we propose an automated methodology to cluster VMs starting from the usage of multiple resources, assuming no knowledge of the services executed on them. The innovative contribution of the proposed methodology is the use of the statistical technique known as principal component analysis （PCA） to automatically select the most relevant information to cluster similar VMs. We apply the methodology to two case studies, a virtualized testbed and a real enterprise data center. In both case studies, the automatic data selection based on PCA allows us to achieve high performance, with a percentage of correctly clustered VMs between 80% and 100% even for short time series （1 day） of monitored data. Furthermore, we estimate the potential reduction in the amount of collected data to demonstrate how our proposal may address the scalability issues related to monitoring and management in cloud computing data centers.

关键词： cloud computing resource monitoring principal component analysis k-means clustering

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Tuning two-dimensional electron and hole gases at LaInO_(3)/BaSnO_(3) interfaces by polar distortions,termination,and thickness

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npj Computational Materials 2021年第1期7卷 1584-1591页

作者： Wahib Aggoune claudia Draxl Institut für Physik and IRIS Adlershof Humboldt-Universität zu Berlin12489 BerlinGermany

Two-dimensional electron gases(2DEG),arising due to quantum confinement at interfaces between transparent conducting oxides,have received tremendous attention in view of electronic ***,we explore the potential of interfaces formed by two lattice-matched wide-gap oxides of emerging interest,i.e.,the polar,orthorhombic perovskite LaInO_(3)and the nonpolar,cubic perovskite BaSnO_(3),employing first-principles *** find that the polar discontinuity at the interface is mainly compensated by electronic relaxation through charge transfer from the LaInO_(3)to the BaSnO_(3)*** leads to the formation of a 2DEG hosted by the highly dispersive Sn-s-derived conduction band and a 2D hole gas of O-p character,strongly localized inside LaInO_(3).We rationalize how polar distortions,termination,thickness,and dimensionality of the system(periodic or non-periodic)can be exploited in view of tailoring the 2DEG characteristics,and why this material is superior to the most studied prototype LaAlO_(3)/SrTiO_(3).

关键词： termination gases distortion

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PHASE PORTRAITS OF THE LESLIE-GOWER SYSTEM

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Acta Mathematica Scientia 2022年第5期42卷 1734-1742页

作者： Jaume LLIBRE claudia VALLS Departament de Matematiques Universitat Autonoma de Barcelona08193BellaterraBarcelonaCataloniaSpain Departamento de Matematica Instituto Superior TecnicoUniversidade de LisboaAu.Rovisco Pais 1049-001LisboaPortugal

In this paper we characterize the phase portraits of the Leslie-Gower model for competition among *** give the complete description of their phase portraits in the Poincarédisc(i.e.,in the compactification of R^(2) adding the circle S1 of the infinity)modulo topological *** is well-known that the equilibrium point of the Leslie-Gower model in the interior of the positive quadrant is a global attractor in this open quadrant,and in this paper we characterize where the orbits attracted by this equilibrium born.

关键词： predator-prey models Leslie-Gower system Poincare compactification global phaseportraits

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Genotoxicity biomarkers in aquatic bioindicators

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Current Zoology 2014年第2期60卷 273-284页

作者： claudia BOLOGNESI Silvia CIRILLO Environmental Carcinogenesis Unit IRCCS Azienda Ospedaliera Universitaria San Martino- IST Istituto Nazionale Ricerca sulCancro L.go Rosanna Benzi 10 Genova Italy

Pollution of the aquatic environment is an ever-growing problem, as waters are the ultimate sink for the large number of xenobiotics from multiple sources. DNA damaging agents have a significant ecological relevance since they are implicated in many pathological processes and exert effects beyond that of individual being active through following generations. A large number of methods have been applied to evaluate genotoxic damage in different aquatic species. Comet assay, as method for de- tecting DNA alterations, and micronucleus test, as an index of chromosomal damage are the most widely applied and validated methods in field studies. These methods were applied in different vertebrate and invertebrate aquatic species, but only mollusk and fish species have been employed in routine biomonitoring programs. Mussels, due to their widely geographical distribution and the suitability for caging represent the bioindicator of choice in field studies. Mytilus species is the most used marine mussel. The use of fish is limited to specific geographic areas. The present review mainly focuses on the application of comet assay and micronucleus test in mussels. A number of biomonitoring studies in mussels, using comet assay or micronucleus test, revealed exposure to different classes of genotoxic compounds with a good discrimination power. The different evidence from the two as- says, reflects different biological mechanisms for the two genetic endpoints, DNA damage and chromosomal damage, suggesting their combined application in the field. Different endogenous and exogenous factors have been shown to modulate the genotoxic responses in mussels, acting as confounding factors in environmental monitoring. The use of standardized protocol for caging, sampling and genotoxity evaluation is critical in biomonitoring studies. The use of a multimarker approach coupling genotoxicity biomarkers with physiological and biochemical factors allows to have a complete picture of the environmenta

关键词： Aquatic animals Genotoxicity Bioindicator Biomarker Micronucleus test Comet assay Bivalve Mussel

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