1,720,961 research outputs found
With feet on the ground: The vegetable garden as a space for participation and recreation for older people
Full text linkEl presente artículo procura dar a conocer la experiencia de una intervención sociocomunitaria que se está desarrollando en y junto a una residencia de personas mayores de la ciudad de Santa Fe, en el marco del Proyecto de Extensión de Interés Social (PEIS) “Adultos Mayores y el medio: educando para el cuidado del Hogar Don Guanella (HDG)”, que financia la Universidad Nacional del Litoral (UNL). El PEIS consiste en la realización de talleres que procuran lograr un correcto tratamiento de los residuos inorgánicos (separación, clasificación y reutilización) y orgánicos (compostización y vermicultivo). Además, este escrito intenta transmitir algunas reflexiones, provisorias y en discusión, sobre las potencialidades que ofrece la extensión universitaria para promover la participación social de las personas mayores, a la vez que favorecer una representación social positiva sobre la vejez.This article seeks to publicize the experience of a socio-community intervention that is being developed in and with a nursing home in Santa Fe city, within the framework of the Social Interest Extension Project "Older people and the environment: educating for the care of the Hogar Don Guanella ”, which is financed by the Universidad Nacional del Litoral (UNL). It consists of conducting workshops on the vegetable garden that seek to achieve a better treatment of inorganic (separation, classification and reuse) and organic (composting and vermiculture) wastes. In addition, it tries to convey some reflections, provisional and in discussion, about the potential offered by the university extension to promote the social participation of the older adults, at the same time as favoring a positive social representation on old age.Fil: Marzioni, Sofía Clarisa. Universidad Nacional del Litoral. Facultad de Ciencias Jurídicas y Sociales. Centro de Investigaciones de la Facultad de Ciencias Jurídicas y Sociales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Rodriguez, Alba Rut. Universidad Nacional del Litoral; ArgentinaFil: Angeloni, Marcos Exequiel. Universidad Nacional del Litoral; Argentin
Efectos subletales de la lambda-cialotrina sobre eisenia fetida (Annelida, Oligochaeta, Lumbricidae)
Full text linkEl uso intensivo de agroquímicos provoca efectos indeseables sobre la fauna no blanco. Dentro de la misma, los oligoquetos contribuyen a mantener la estructura y fertilidad del suelo. La lambda-cialotrina es uno de los insecticidas piretroides más utilizados en Argentina, pero son escasos los datos existentes acerca de su toxicidad sobre oligoquetos. Los objetivos de este trabajo fueron evaluar mediante bioensayos de toxicidad crónica los efectos de lambda-cialotrina (producto comercial al 5%) en Eisenia fetida sobre los 2 parámetros de comportamiento, sobrevivencia, biomasa, reproducción y bioacumulación, así como la persistencia en suelo OECD de dicho tóxico. Los resultados muestran un comportamiento de huída intenso a partir de la concentración más baja, con un EC50 de 1,36 mg.kg-1 (95% C.L. 0,24 - 2,80). No se observaron efectos en sobrevivencia y alimentación. La reproducción fue afectada significativamente (F= 11,94, P<0,05). La producción y fertilidad de ootecas disminuyó a la vez que se prolongó el tiempo de incubación de las mismas respecto al control. El BAF osciló entre 0,005 y 0,08 en las distintas concentraciones y el tiempo de degradación total del tóxico en suelo fue de 86 días.Fil: Ricardo, Tamara. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; ArgentinaFil: Maitre, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Universidad Nacional del Litoral; ArgentinaFil: Rodriguez, Alba Rut. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentin
Evaluación de la Abundancia y Diversidad de Lombrices de tierra en relación con el Uso del Suelo en el Cinturón Hortícola de Santa Fe (Argentina)
Full text linkLas lombrices de tierra constituyen un componente importante en la fauna del suelo contribuyendo activa y beneficiosamente en su estructura y fertilidad. Estos organismos son sensibles ante distintos manejos y grados de perturbación del suelo respondiendo como bioindicadores de la «salud» del mismo. El Cinturón Hortícola Santafesino (Santa Fe, Argentina) exhibe diferencias no sólo en tipos de cultivos sino también en sistemas de producción y condiciones de trabajo. El objetivo del estudio fue determinar la abundancia y diversidad de la oligoquetofauna en los suelos con distintos tipos de manejo en las localidades de Ángel Gallardo y Monte Vera (Dpto. La Capital, Santa Fe - Argentina). Se seleccionaron tres agroecosistemas: labranza convencional (LC), siembra directa orgánica (SDO) y siembra directa (SD). En cada campo se realizaron dos muestreos, correspondiendo uno a la estación verano y el otro a otoño de 2008. Se analizaron algunas propiedades físicas y químicas de los suelos como también residuos de plaguicidas. La densidad de oligoquetos presentó diferencias por estación y sistemas de producción (p = 0,001) destacándose el sitio de SDO con el mayor número de individuos en las dos estaciones muestreadas. La taxocenosis constó de dos familias: Lumbricidae y Megascolecidae, y tres especies: Aporrectodea rosea, Aporrectodea trapezoides y Amynthas morrisi. La diversidad fue baja (H’= 0,33), siendo A. rosea la especie más común en los sitios muestreados y A. trapezoides la más abundante, incorporándose esta última a la lista de oligoquetos para la zona hortícola ya que en estudios anteriores no se hallaba registrada. La composición y estructura de la taxocenosis de lombrices de tierra se ve afectada no sólo por las condiciones ambientales y labores de producción, sino también por los parámetros físicos y químicos del suelo, que en conjunto condicionan la sensibilidad de la oligoquetofauna.Earthworms are an important component of soil fauna, contributing actively to improve soil structure and fertility. These organisms are highly sensitive to different soil managements and degrees of soil disturbance and were therefore adopted as biomarkers of the soil «health». The Cinturón Hortícola Santafesino (Santa Fe, Argentina) exhibits a large variability in crop species, production systems and working conditions. The aim of this study was to determine the abundance and diversity of earthworms in soils under different types of managements near the villages of Ángel Gallardo and Monte Vera (Dept. La Capital, Santa Fe, Argentina). The three agroecosystems selected were: conventional tillage (LC), notillage with added organic amendments (SDO) and no-tillage (SD). Two samplings were conducted in each field: one in summer and the other in fall of 2008. In addition, some physical and chemical properties of soils were analyzed, as well as the presence of pesticide residues. The density of oligochaetes showed significant differences between seasons and production systems (= 0.001). The SDO site had the greatest number of individuals in the two sampled seasons. The taxocenosis consisted of two families: Lumbricidae and Megacolescidae, and three species: Aporrectodea rosea, Aporrectodea trapezoides and Amynthas morrisi. The diversity was low (H’= 0.33), resulting A. rosea the most common and A. trapezoides the most abundant species, respectively. A. trapezoides was incorporated to the earthworm records of the area because it had never been reported in previous studies. The composition and structure of the earthworm’s taxonomy is not only affected by the different agricultural practices and the edaphic and environmental conditions, but also by the soil´s physical and chemical properties that influence the oligoquetofauna sensitivity.Fil: Masin, Carolina Elisabet. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; ArgentinaFil: Rodriguez, Alba Rut. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; ArgentinaFil: Maitre, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentin
Earthworms to improve glyphosate degradation in biobeds
No full textIn this work, earthworm effect on the efficiency of biobeds for glyphosate degradation was studied. Three biomixtures with and without the addition of earthworms (Eisenia fetida species) were evaluated. The initial concentration of glyphosate was 1000 mg/kg biomixture. Glyphosate and biological parameters were measured as a function of time. Earthworm survival, biomass, and reproduction were evaluated as well. All biomixtures that contain earthworms reached 90% of glyphosate degradation at 90 days in comparison with the biomixtures without earthworms that reached 80% approximately at the same time.Also, within the biomixtures that contained earthworms, glyphosate degradation rate was significantly higher in the one made up with soil and wheat stubble (Ws-E) showing excellent capacity for aminomethylphosphonic acid (AMPA) degradation, the mainmetabolite of glyphosate degradation. In addition, a study performed after the vermiremediation process showed that E. fetida can tolerate high glyphosate concentration without modifications in its life traits. It can be concluded that the use of E. fetida withinthe biobeds is an excellent combination to improve glyphosate and AMPA removal.Fil: Lescano, Maia Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Masin, Carolina Elisabet. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Rodriguez, Alba Rut. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Godoy, José Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Zalazar, Cristina Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentin
Approach to assess agroecosystem anthropic disturbance: Statistical monitoring based on earthworm populations and edaphic properties
Full text linkLand degradation due to anthropic factors is the reduction of its actual or potential productivity. Nowadays, this topic is a major concern, as it affects more than one third of the soil in the world. This work presents an empirical assessment of the anthropic disturbance level (ADL) for agricultural and livestock production systems. This assessment is obtained by mapping the characteristics of land use and management practices by using five specific indicators and integrating them into a global indicator (ADL score). Earthworm populations (good indicators of soil quality) in soils under different production systems are studied to determine if the population changes are attributable to the intensity of land use and management practices. A correlation model between ADL, edaphic properties, and earthworm population characteristics is developed by using samples of 20 sites in Santa Fe province, Argentina. The inclusion of ADL allowed finding a consistent correlation structure. The results also showed that earthworm density, species diversity, and activity change at the different sites were highly sensitive to anthropic disturbance. Based on this data-driven model, the ADL can be estimated by measuring edaphic and biological data on a soil sample to monitor soil conditions for different production systems. Thus, ADL monitoring would allow deciding how to continue using and managing the land to improve its sustainability.Fil: Masin, Carolina Elisabet. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Rodriguez, Alba Rut. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; ArgentinaFil: Zalazar, Cristina Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Godoy, José Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentin
Current knowledge on earthworm richness and distribution in Santa Fe province, Argentina
Full text linkUpdated list of earthworms (Oligochaeta: Lumbricina) from Santa Fe (Argentina) is presented in this work, including current data of species richness and territorial distribution status and information collected by Ljungström and collaborators 40 years ago. Field samplings were conducted between 2012 and 2015 in 23 sites, located in 11 of the 19 districts of the province. Earthworms were collected following a standard methodology (Tropical Soil Biology and Fertility). The conservation of specimens was done with 4% formalin solution and their identification was performed according to taxonomy keys. A total of 15 earthworm species were identified and grouped into ten genus and five families: Acanthodrilidae (Dichogaster bolaui, Microscolex dubius), Glossoscolecidae (Glossodrilus parecis), Lumbricidae (Aporrectodea caliginosa, Aporrectodea rosea, Aporrectodea trapezoides, Bimastos parvus, Eisenia fetida, Octolasion tyrtaeum), Megascolecidae (Amynthas gracilis, Amynthas morrisi, Metaphire californica), Ocnerodrilidae (Eukerria saltensis, Eukerria rosea, Eukerria stagnalis). From all the species found five, G. parecis, E. saltensis, E. rosea, E. stagnalis and M. dubius, are native to South America, and the rest were introduced from Asia and Europe. Endogeic species were present in all environments surveyed. In particular, the species exotic A. trapezoides and A. morrisi showed wide geographical distribution, being in at 70 and 50% respectively of total studied sites. One species, E. rosea, which is in the list, was not recorded in the sampling of 40 years ago. The results reveal that remarkable change of biodiversity landscape in this province, associated with soil use and management of productive systems developed over 40 years, could have influenced the distribution and less register of earthworm species.Fil: Masin, Carolina Elisabet. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Momo, Fernando Roberto. Universidad Nacional de General Sarmiento; ArgentinaFil: Zalazar, Cristina Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Rodriguez, Alba Rut. Universidad Nacional del Litoral. Facultad de Humanidades y Ciencias; Argentin
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
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