Effects of prenatal ethanol exposure on hidroelectrolyte homeostasis

Fil: Godino, A. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación Médica Mercedes y Martín Ferreyra; Argentina.Fil: Vivas, L. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación Médica Mercedes y Martín Ferreyra; Argentina.Fil: Molina, J.C. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación Médica Mercedes y Martín Ferreyra; Argentina.The aim of the present work was to analyze the effect of prenatal exposure to moderate doses of ethanol (Pre-EtOH) during the gestational days (GD) 17 to 20 on offspring (postnatal day 28-33) hydroelectrolyte balance. We analyzed basal brain neural activity and basal/induced sodium appetite and renal response stimulated by sodium depletion (SD).Fil: Godino, A. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación Médica Mercedes y Martín Ferreyra; Argentina.Fil: Vivas, L. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación Médica Mercedes y Martín Ferreyra; Argentina.Fil: Molina, J.C. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación Médica Mercedes y Martín Ferreyra; Argentina.Biología del Desarroll

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An onto-semiotic approach to visualization in mathematics education

La visualización es un campo de investigación de creciente importancia en educación matemática. Sin embargo, el estudio de su naturaleza y relación con otras formas de registro y comunicación de información continúa siendo tema de reflexión. En este trabajo proponemos una manera de entender el lenguaje y el pensamiento visual, y sus relaciones con el lenguaje y pensamiento analítico, usando las herramientas teóricas del «enfoque ontosemiótico» del conocimiento matemático. Mostraremos que la noción de «configuración visual» de objetos y procesos, con sus diferentes modalidades contextuales, permite articular diversas perspectivas sobre la visualización, comprender sus relaciones con otras formas analíticas de expresión y reconocer diversos grados de visualización de la actividad matemática.Visualization is a research field of growing importance in mathematics education. However, the study of their nature and relationship to other forms of information recording and reporting continues to be a subject of reflection. In this article we propose a way of understanding the language and visual thinking, and their relations with the language and analytical thinking, using the theoretical tools of the «onto-semiotic approach» to mathematical knowledge. We will show that the notion of «visual configuration» of objects and processes, in its various contextual forms, allow articulate different perspectives on visualization, to understand its relationships with other analytical forms of expression and to recognize different levels of visualization in mathematical activity

Profitability of the Mediterranean and NE Atlantic new target sea cucumber species: some repercussions for their fisheries management

The term profitability can be understood as the ratio in percentage between fresh weight of animals and the dry weight of the obtained beche-de-mer depending on the body wall thickness of sea cucumbers and water content. Specimens decrease their weight and length considerably, when they are processed. However, scarce information about profitability of commercial sea cucumber from Mediterranean and NE Atlantic has been published until now. In this study, we focused on Holothuria tubulosa, Holothuria polii, Holothuria mammata and Holothuria arguinensis. For most of the species considered, a good lineal regression was found between eviscerated length (EL) vs eviscerated weight (EW), and EW vs dried weight (DW)however, H. arguinensis showed a high dispersal of data and low regression coefficients. The highest profitability (20.57 % +/- 4.40) was registered on H. arguinensis and the second one (15.36 % +/- 2.68) on H. polii. H. mammata and H. tubulosa showed lower profitability (11.95 % +/- 0.54 and 10.75 % +/- 0.55, respectively). Significant differences were found between profitability values of the studied species. Some implications for fisheries management were deduced from the relationships between profitability vs EW.CUMARSUR project - Fundacao para a Ciencia e a Tecnologia [PTDC/MAR-BIO/5948/2014]HOLREMAR project - Sayanes Mar S.L.FCTPortuguese Foundation for Science and Technology [IF/00998/2014, CCMAR/BI/0007/2015

Seagrass debris as potential food source to enhance Holothuria arguinensis' growth in aquaculture

Holothuria arguinensis aquaculture started to be developed in 2014, being the first sea cucumber species from Europe. However, some aspects of its aquaculture biotechnology, such diets, need to be assessed. This work aimed to evaluate seagrass debris of Zostera noltii and Cymodocea nodosa as food source for broodstock maintenance in tanks, during breeding periods. The given feed rations per tank were calculated as the 30% of the total sea cucumber biomass in each tank and reviewed each week. Then, feed rations of seagrass and sediment were calculated from this value, according to the following percentages: 40% sediment, 15% Z. noltii, 40% Z. noltii, 15% C. nodosa and 40% C. nodosa. H. arguinensis growth, feeding rate and nutritional value were assessed under these diets. H. arguinensis fed with 40% of Z. noltii showed the highest growth (specific growth rate = 0.09 +/- 0.06%/day, absolute growth rate = 0.11 +/- 0.07 g/day) increasing their final weight in 5.86 +/- 3.57% in 57 days. However, the individuals fed with C. nodosa showed a negative growth. H. arguinensis showed a reduction in its feeding rate as the organic matter content in the diets increased. H. arguinensis did not show any important change on proximate composition, protein, lipid, mineral contents and fatty acids profile among the feeding groups, or in comparison with the individuals collected from wild habitat. Therefore, H. arguinensis could be fed with Z. noltii debris during tanks maintenance along breeding period, ensuring its growth and maintaining its nutritional profile.Fundacao para a Ciencia e a TecnologiaPortuguese Foundation for Science and TechnologyEuropean Commission [CCMAR/SC/BI/02/2016, FRH/BD/105541/2014, IF/00049/2012, IF/00998/2014, PTDC/MAR-BIO/5948/2014, PTDC/MAR/119363/2010, SFRH/BPD/70689/2010]http://creativecommons.org/licenses/by/4.0

Una aproximación ontosemiótica a la visualización en educación matemática

La visualización es un campo de investigación de creciente importancia en educación matemática. Sin embargo, el estudio de su naturaleza y relación con otras formas de registro y comunicación de información continúa siendo tema de reflexión. En este trabajo proponemos una manera de entender el lenguaje y el pensamiento visual, y sus relaciones con el lenguaje y pensamiento analítico, usando las herramientas teóricas del «enfoque ontosemiótico» del conocimiento matemático. Mostraremos que la noción de «configuración visual» de objetos y procesos, con sus diferentes modalidades contextuales, permite articular diversas perspectivas sobre la visualización, comprender sus relaciones con otras formas analíticas de expresión y reconocer diversos grados de visualización de la actividad matemática.Visualization is a research field of growing importance in mathematics education. However, the study of their nature and relationship to other forms of information recording and reporting continues to be a subject of reflection. In this article we propose a way of understanding the language and visual thinking, and their relations with the language and analytical thinking, using the theoretical tools of the «onto-semiotic approach» to mathematical knowledge. We will show that the notion of «visual configuration» of objects and processes, in its various contextual forms, allow articulate different perspectives on visualization, to understand its relationships with other analytical forms of expression and to recognize different levels of visualization in mathematical activity

Probabilidade de acontecimentos envolvendo aspetos lógicos

In this article, we study the Probability's knowledge of prospective primary school teachers, when there are logical aspects involved in the formulation of events. Forty-six students participated in the study, from a University in Northern Portugal, who had to resolve a three-item task in the context of a formal evaluation: the first one, on the union probability (connective or), the second one, on the joint probability (connective and), and the third one, on the conditional probability, in which the conditioned event is, in turn, a joint probability (connective and). In terms of the main results of the study, it was found that the students showed a very limited performance, frequently changing the connectives and and or, the inclusive disjunction with the exclusive disjunction and in the disjunction considered as incompatible non-disjoint events.Neste artigo estuda-se o conhecimento de Probabilidades de futuros professores dos primeiros anos escolares, quando na formulação dos acontecimentos estão envolvidos aspetos lógicos. Participaram no estudo 46 alunos da Licenciatura em Educação Básica, de uma Universidade do Norte de Portugal, os quais resolveram uma tarefa, com três itens, em contexto de avaliação formal: o primeiro sobre a probabilidade da reunião (conetivo ), o segundo sobre a probabilidade conjunta (conetivo ) e o terceiro sobre a probabilidade condicionada, em que o acontecimento condicionado é, por sua vez, uma probabilidade conjunta (conetivo ). Em termos dos principais resultados do estudo, verificou-se que os alunos revelaram um desempenho muito limitado, trocando, frequentemente, os conetivos e , a disjunção inclusiva com a disjunção exclusiva e na disjunção consideraram como sendo incompatíveis acontecimentos não disjuntos.Este trabalho contou com o apoio de Fundos Nacionais através da FCT – Fundação para a Ciência e a Tecnologia no âmbito do projeto PEst-OE/CED/UI1661/2014, do CIEd-UM e do projeto UID/Multi/04016/2016