1,720,963 research outputs found
Evaluation of insecticidal activity of volatile compounds against the vine mealybug
Full text linkFil: Peschiutta, M. L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Peschiutta, M. L. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Brito, V. D. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Brito, V. D. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Usseglio, V. L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Usseglio, V. L. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Zunino, M. P. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Zunino, M. P. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Ordano, M. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Ordano, M. A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Zygadlo, J. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Zygadlo, J. A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Planococcus ficus Signoret, the vine mealybug, is a principal pest of vineyards worldwide. The objective of this study was to evaluate the
insecticidal properties of volatile compounds on P. ficus and their phytotoxicity in the grapevine.Fil: Peschiutta, M. L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Peschiutta, M. L. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Brito, V. D. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Brito, V. D. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Usseglio, V. L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Usseglio, V. L. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Zunino, M. P. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Zunino, M. P. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Ordano, M. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Ordano, M. A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Zygadlo, J. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Zygadlo, J. A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Otros Tópicos Biológico
Investigating Mercury (Hg) and Water Stable Isotopes Composition (δ18O and δ2H) in Bottled Waters: A survey Study in Italy
No full textIn the last years, several studies have been conducted on bottled waters (BW) at national, regional, and worldwide scale considering major and trace elements, organic compounds and/or emerging contaminants. Hitherto, a few studies focused on mercury, and water stable isotopes determination of bottled waters are available in the literature. Therefore, this kind of research on BW can periodically be useful for understanding the potential variation of these parameters over time. Italy is one of the main producers of BW and Italians are the greatest consumers of natural mineral waters per capita in the European Union. The natural mineral water sources (natural spring and groundwater) across Italy, are generally placed on flood plains or mountain slopes. European and national regulations established that BW must be microbiologically pure without any purification process because they originate from aquifers or underground reservoirs. Total mercury (Hg), stable isotopic composition (δ18O and δ2H) and additional physico-chemical parameters have been evaluated on selected bottled waters purchased in the Italian stores. Bottle samples from different Italian water catchments all over Italy are here characterized to be representative of different hydrogeological conditions. Numerous brands of BW representing different water typologies (still, sparkling, naturally sparkling, and slightly sparkling), bottled in different packaging, have been considered. Instrumental analyses (e.g.: CVAFS, Cavity Ring-Down Spectroscopy) were carried out in the laboratories of CNR and Ca’ Foscari University. The main objective of this work is to investigate the occurrence of Hg in Italian bottled waters considering δ18O, δ2H and deuterium excess, as well as the differences on physico-chemical parameters, (approx. ten years later, after the last national surveys) taking into account their wide representativeness of the geographical area and geological provenance
Combining isotope measurements, water quality sensors and computational methods to unravel in-stream carbon dynamics of a complex stream network in the Italian Alps
No full textFreshwaters are key players in global carbon (C) cycle as they collect C leaked from the terrestrial ecosystem and host in-stream production and respiration processes. C transported by streams and rivers can be out-gassed to the atmosphere in the form of carbon dioxide (CO2), buried in the sediments or reach the coastal oceans. In the last decades, the relevance of these exchange fluxes to global CO2 emissions has been recognised, as well as the importance of describing the C dynamics at the stream sediment-water-atmosphere interfaces. Describing the functioning of fluvial C cycling under varying hydrodynamic and morphological traits is even more critical in mountain catchments due to the rapid change they are facing under global warming. However, estimation of these fluxes is largely uncertain and requires the integration of multidisciplinary theoretical and observational studies. This work illustrates the planned activities and the preliminary results of two synergistic research projects aimed at resolving C cycling and stream metabolism in an alpine catchment: project CONSTRAIN (CarbON exchange processes across STReAm INterfaces) funded by the Italian Ministry of Research, and project iNEST (Interconnected North-Est Innovation Ecosystem) funded by the European Union Next-Generation EU. The projects focus on the Rio Valfredda, a pristine mountain stream network draining a 5.3 km2 catchment in the Italian Alps. The planned activities include the continuous, high frequency measurement of dissolved oxygen and carbon dioxide, along with environmental ancillary variables like photosynthetic active radiation, stream temperature, barometric pressure, pH and electrical conductivity, in four reaches within the stream network. Through a newly proposed model that couples the diel fluctuations of O2 and CO2, we aim to jointly estimate stream metabolism (i.e. gross primary production and ecosystem respiration), lateral input of dissolved inorganic carbon (DIC) and CO2 out-gassing to the atmosphere. We aim at linking C cycling patterns with hydrologic traits of the selected reaches. To that end, water stable isotopes (δ18O and δ2H) are being monitored in several tributaries of the stream network (grab samples with monthly frequency), at the catchment outlet (at daily frequency) and in the precipitation collected by rain gauges placed at different altitudes. From the analysis of the isotopic signature of streamflow and precipitation we reconstruct summary statistics of the travel time distribution of water within the hillslope with the goal of relating it with the lateral flow of DIC. The comprehensive set of information collected, together with the previous knowledge about the hydrological dynamics of the Valfredda catchment, which has been closely monitored for the past 5 years in the framework of the DyNET project funded by the European Research Council, will allow upscaling C cycling at the level of the whole network rather than focusing on individual reaches. These projects will enhance our understanding of the role played by hydrology on the metabolism of complex river networks, unraveling the multifaceted dynamical relations that link rivers with the surrounding environment and allowing a robust assessment of the contribution of freshwaters to CO2 emissions
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Insecticidal and repellent activities of essential oils from Aloysia Citriodora and Minthostachys Verticillata against Sitophilus Zeamais (Coleoptera: Curculionidae)
Full text linkFil: Arena, J. S. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Arena, J. S. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Peschiutta, M. L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Peschiutta, M. L. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Calvimonte, H. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Calvimonte, H. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Areco, V. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Areco, V. A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Herrera, J. M. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Herrera, J. M. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Defagó, M. T. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Defagó, M. T. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Zygadlo, J. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Zygadlo, J. A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.The maize weevil Sitophilus zeamais Motschulsky is a worldwide primary pest of stored maize. Essential oils (EO) constitute an important source of natural bioactive compounds and are considered interesting alternatives to conventional insecticides against storedproduct pests. The aim of the current study was to evaluate the insecticidal and repellent activities of EO from lemon verbena (Aloysia citriodora Palau) and peperina (Minthostachys verticillata Griseb. Epling) and of their combination, against S. zeamais.Fil: Arena, J. S. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Arena, J. S. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Peschiutta, M. L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Peschiutta, M. L. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Calvimonte, H. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Calvimonte, H. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Areco, V. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Areco, V. A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Herrera, J. M. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Herrera, J. M. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Defagó, M. T. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Defagó, M. T. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Zygadlo, J. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Zygadlo, J. A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Otros Tópicos Biológico
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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