Evaluation of Mesocyclops annulatus (Copepoda: Cyclopoidea) as a control agent of Aedes aegypti (Diptera: Culicidae) in Argentina.

We evaluated the potential of Mesocyclops annulatus as a control agent of Aedes aegypti in La Plata city (Argentina). Mosquito larval survivorship due to predation by these copepods was estimated at weekly intervals during the oviposition period of A. aegypti. Mean weekly A. aegypti larval survivorship in cylindrical plastic containers (12 cm height and 11 cm diameter) with copepods was significantly lower than in control containers. Furthermore, weekly larval survival was negatively correlated with M. annulatus adult density, and approximately 23 adult copepods/container would be a threshold density over which the weekly mosquito larval survivorship approached zero. The copepods were able to persist in all containers during approximately 100 days (in three of them until the end of the experiment: 155 days) without the resource represented by A. aegypti larvae. The predation and persistence observed suggest that M. annulatus is a potential control agent to be considered in biological control programs.Fil: Marti, Gerardo Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Micieli, Maria Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Scorsetti, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; ArgentinaFil: Liljesthrom, Gerardo Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; Argentin

2-arachidonoylglycerol metabolism is differently modulated by oligomeric and fibrillar conformations of amyloid beta in synaptic terminals

Alzheimer´s disease (AD) is the most prevalent disorder of senile dementia mainly characterized by amyloid-beta peptide (Aβ) deposits in the brain. Cannabinoids are relevant to AD as they exert several beneficial effects in many models of this disease. Still, whether the endocannabinoid system is either up- or down-regulated in AD has not yet been fully elucidated. Thus, the aim of the present paper was to analyze endocannabinoid 2-arachidonoylglycerol (2-AG) metabolism in cerebral cortex synaptosomes incubated with Aβ oligomers or fibrils. These Aβ conformations were obtained by "aging" the 1-40 fragment of the peptide under different agitation and time conditions. A diminished availability of 2-AG resulting from a significant decrease in diacylglycerol lipase (DAGL) activity was observed in the presence of large Aβ1-40 oligomers along with synaptosomal membrane damage, as judged by transmission electron microscopy and LDH release. Conversely, a high availability of 2-AG resulting from an increase in DAGL and lysophosphatidic acid phosphohydrolase activities occurred in the presence of Aβ1-40 fibrils although synaptosomal membrane disruption was also observed. Interestingly, neither synaptosomal mitochondrial viability assayed by MTT reduction nor membrane lipid peroxidation assayed by TBARS formation measurements were altered by Aβ1-40 oligomers or fibrils. These results show a differential effect of Aβ1-40 peptide on 2-AG metabolism depending on its conformation.Fil: Pascual, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Gaveglio, Virginia Lucía. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; ArgentinaFil: Giusto, Norma Maria. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; ArgentinaFil: Pasquaré, Susana Juana. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentin

Preschoolers developing words and worlds

This is a participatory project developed in a Portuguese kindergarten and organized into two phases. The first is the development of a multidisciplinary activity plan made for and with children. The goal is to work with children in a TALK area inside the classroom to improve language, and to initiate them into Information Communication Technologies (ICT) skills promoting Media Education (ME) as well. In Portugal, ICT integration is rarely implemented at kindergarten age, and frequently uses dependent technologies (requiring adult assistance). On the other hand, in literature tangible interfaces are considered a good approach to fulfill child abilities and start digital literacy. The second phase intends to update a low-cost manipulative to the same end: a digital flannel board. Nevertheless, children are its design builders, and as co-researchers they will plan, execute, explore, play and evaluate their own interface.CIE

Quality assessment of online information on Brazilian domain sites related to dental implants.

Brazil is one of the biggest consumer markets for dental implants in the world, and most of the information that patients have about this therapy is acquired from the internet. However, no study evaluated the quality of online information related to dental implants in Brazilian domain sites. The aim of the study was to evaluate the quality of online information in Portuguese language related to dental implants and to compare this information with the literature in English language. The term "dental implants" was searched using Google and Yahoo!. Sites of the first 10 pages of each search engine were considered for the study, and at the end 53 sites were included. The Health-Related Web Site Evaluation Form (HRWEF/ Emory) was applied and a total score was assigned to each of the sites by two researchers. The HRWEF/Emory questionnaire gives a possible variation of 50% -100%, being below 75% considered poor, between 75 and 90% adequate and above 90% excellent. 5.66% of the sites had poor score, 84.90% adequate and 9.43% excellent, with an average of 83.18%. When the questionnaire was separated by categories of linked issues, the quality scores were lower than those observed in the overall assessment (39.52% were poor), showing that the scores on the final results were increased by the readability and navigability categories. There was no difference regarding quality of websites between the search engines Google and Yahoo!. The quality of information on Brazilian domain sites related to dental implants is overall adequate according to HRWEF/Emory. There is no difference in the quality of information between search engines Google and Yahoo!. Direct comparisons with studies evaluating the quality of information in other languages are inappropriate because of the use of different assessment toolsBrazil is one of the biggest consumer markets for dental implants in the world, and most of the information that patients have about this therapy is acquired from the internet. However, no study evaluated the quality of online information related to dental implants in Brazilian domain sites. The aim of the study was to evaluate the quality of online information in Portuguese language related to dental implants and to compare this information with the literature in English language. The term "dental implants" was searched using Google and Yahoo!. Sites of the first 10 pages of each search engine were considered for the study, and at the end 53 sites were included. The Health-Related Web Site Evaluation Form (HRWEF/ Emory) was applied and a total score was assigned to each of the sites by two researchers. The HRWEF/Emory questionnaire gives a possible variation of 50% -100%, being below 75% considered poor, between 75 and 90% adequate and above 90% excellent. 5.66% of the sites had poor score, 84.90% adequate and 9.43% excellent, with an average of 83.18%. When the questionnaire was separated by categories of linked issues, the quality scores were lower than those observed in the overall assessment (39.52% were poor), showing that the scores on the final results were increased by the readability and navigability categories. There was no difference regarding quality of websites between the search engines Google and Yahoo!. The quality of information on Brazilian domain sites related to dental implants is overall adequate according to HRWEF/Emory. There is no difference in the quality of information between search engines Google and Yahoo!. Direct comparisons with studies evaluating the quality of information in other languages are inappropriate because of the use of different assessment tool

Dieta de Pomacea canaliculata (gastropoda: ampullariidae) en su hábitat natural basada en análisis de contenidos digestivos e isótopos estables

Pomacea canaliculata es una especie nativa de la Cuenca del Río de la Plata, actualmente considerada invasora en el Sur y Este de Asia donde fue introducida con fines comerciales y se ha convertido en la principal plaga de los cultivos de arroz de la región.Realizar más investigaciones en el hábitat natural de este organismo es necesario debido a que características fundamentales de su ecología trófica permanecen aún desconocidas. El objetivo de este trabajo fue estudiar la dieta de P. canaliculata en su hábitat natural mediante los análisis de contenidos digestivos e isótopos estables de 13C y 15N. Las muestras biológicas fueron tomadas desde noviembre de 2009 hasta diciembre de 2010 en el arroyo Carnaval, un arroyo pampeano característico. Las muestras para análisis de isótopos estables y posterior aplicación de modelos de mezcla fueron colectadas en noviembre de 2011. La aplicación de un diagrama de estrategia trófica permitió establecer una dieta generalista con elevado consumo de detritos, seguidos por plantas vasculares y algas. Los resultados del modelo de mezcla, sin embargo, indicaron que la contribución relativa a la dieta de todos los recursos basales evaluados (materia orgánica particulada fina y gruesa, epipelon y macrófitas acuáticas) fue similar (aproximadamente 40 %). Estos resultados evidenciaron una fuerte plasticidad dietaria para la especie.Pomacea canaliculata is native to Rio de la Plata basin, and it is invasive in most of South and Southeast Asia after accidental introduction during unsuccessful attempts to establish commercial aquaculture of this species, and being present, the number one pest of rice crops in the region. Investigations in its native habitat are still needed because fundamental issues of its trophic ecology remain unknown. The aim of this research was to study the diet of P. canaliculata in its natural habitat through gut content techniques and stable isotopes of 13C and 15N. Biological samples were taken from November 2009 to December 2010 in Carnaval stream, a characteristic Pampean stream. Samples for stable isotopes of 13C and 15N using of a mixing model were collected in November 2011. The trophic strategy diagram evinced a generalist diet with high consumption of detritus followed by the vascular plants and algae. The mixing model results indicated that the relative contribution to the diet was similar for all basal resources: fine and coarse particulate organic matter, epipelon and aquatic macrophytes (approximately 40 %). These results evidenced a strong dietary plasticity for the species.Fil: López Van Oosterom, Maria Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; ArgentinaFil: Ocon, Carolina Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; ArgentinaFil: Ferreira, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; ArgentinaFil: Rodrigues Capitulo, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; Argentin

Contexto histórico e institucionalização acadêmica da psicopedagogia na Argentina

En Argentina, el estudio del aprendizaje y su profesionalización revistió características controvertidas y polémicas desde la institucionalización académica de la Psicopedagogía. El objetivo de este artículo es explorar los modos en que se configuró el campo psicopedagógico y los principales antecedentes que favorecieron la aparición de la práctica psicopedagógica durante la primera mitad del siglo XX y que, asimismo, posibilitaron su inserción en el ámbito universitario en 1956. En base a la revisión efectuada, el surgimiento del Sistema Educativo, la aparición de la categoría de "fracaso escolar" abordado por la práctica de las maestras particulares y la sistematización de la carrera de Psicotecnia se constituyeron como acontecimientos significativos que impulsaron la institucionalización académica de la Psicopedagogía. Se discute la relevancia de continuar con estudios de este tipo que permitan profundizar, contextualizar y comprender las raíces históricas y socio-culturales de las controversias y debates actuales en torno a esta problemática.Na Argentina, o estudo da aprendizagem e as características profissionais controversos e vestidos a partir da institucionalização acadêmica de Psicopedagogia. O objetivo deste trabalho é explorar as maneiras pelas quais o campo foi criado psicopedagógico e os principais elementos que favoreceram o surgimento da prática psicopedagógica na primeira metade do século XX e também permitiu a sua integração na universidade em 1956. Baseado em sua análise, o surgimento do sistema educacional, o surgimento da categoria de "fracasso escolar", proferida pela a prática individual dos professores e sistematização da raça de psicotécnicos foram estabelecidos como eventos significativos que levaram à institucionalização acadêmica da Psicopedagogia. A relevância de tais estudos continua a aprofundar, contextualizar e entender as raízes históricas e sócio-culturais controvérsias e debates em torno deste assunto.Fil: Ventura, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educación. Universidad Nacional de Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educacion; ArgentinaFil: Gagliardi, Raul Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educación. Universidad Nacional de Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educacion; ArgentinaFil: Moscoloni, Nora Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educación. Universidad Nacional de Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educacion; Argentin

Comparative study on the learning styles of argentine university students from different disciplines

La alfabetización académica exige el dominio progresivo de las formas textuales y discursivas propias de cada disciplina. El objetivo de este estudio es indagar los estilos de aprendizaje de estudiantes universitarios, estableciendo comparaciones según el tipo de episteme (Ciencias Humanas-Ciencias Exactas). Se realizó un estudio descriptivo-correlacional de corte transversal. Se aplicó el Inventario de Estilos de Aprendizaje de Felder y Soloman (1998) a 62 estudiantes de Ingeniería y 71 de Psicología de primer año de una universidad pública argentina. Los estudiantes inician su formación académica con distintos estilos de aprendizaje. Las discrepancias encontradas se acentuaron según el tipo de disciplina, y se obtuvieron diferencias estadísticamente significativas en los estilos de percepción (sensorial-intuitivo), representación (visual-verbal)y comprensión (secuencial-global). Los estudiantes de Ingeniería se definieron como sensoriales y visuales; en cambio, las orientaciones en Psicología son intuitivas, verbales y secuenciales. Implicancias educativas son discutidas.Academic literacy requires the progressive mastery of textual and discursive forms of each discipline. The aim of this study is to analyze the learning styles of college students, comparing them by type of episteme (Human Sciences- Sciences). The research was a descriptive-correlational study with a transversal design. We applied the Index of Learning Styles of Felder & Silverman (1998) to 62 engineering students and 71 psychology students of first-year of a public university in Argentina. The main results show that students begin higher education with different learning styles. The discrepancies found were accentuated by the type of discipline; obtaining statistically significant differences in the styles of perception (sensory-intuitive), representation (visual-verbal) and comprehension (sequential-global).The engineering students were defined as sensory and visual. Instead, the guidelines in Psychology are intuitive, verbal, and sequential. Educational implications are discussed.Fil: Ventura, Ana Clara. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educación. Universidad Nacional de Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educacion; ArgentinaFil: Moscoloni, Nora Ana Maria. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gagliardi, Raul Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educación. Universidad Nacional de Rosario. Instituto Rosario de Investigaciones en Ciencias de la Educacion; Argentin

Application of urea-agarose gel electrophoresis to select non-redundant 16S rRNAs for taxonomic studies: palladium(II) removal bacteria

The 16S ribosomal RNA (rRNA) gene has been the most commonly used sequence to characterize bacterial communities. The classical approach to obtain gene sequences to study bacterial diversity implies cloning amplicons, selecting clones, and Sanger sequencing cloned fragments. A more recent approach is direct sequencing of millions of genes using massive parallel technologies, allowing a large-scale biodiversity analysis of many samples simultaneously. However, currently, this technique is still expensive when applied to few samples; therefore, the classical approach is still used. Recently, we found a community able to remove 50 mg/L Pd(II). In this work, aiming to identify the bacteria potentially involved in Pd(II) removal, the separation of urea/heat-denatured DNA fragments by urea-agarose gel electrophoresis was applied for the first time to select 16S rRNA-cloned amplicons for taxonomic studies. The major raise in the percentage of bacteria belonging to genus Clostridium sensu stricto from undetected to 21 and 41 %, respectively, for cultures without, with 5 and 50 mg/L Pd(II) accompanying Pd(II) removal point to this taxa as a potential key agent for the bio-recovery of this metal. Despite sulfate-reducing bacteria were not detected, the hypothesis of Pd(II) removal by activity of these bacteria cannot be ruled out because a slight decrease of sulfate concentration of the medium was verified and the formation of PbS precipitates seems to occur. This work also contributes with knowledge about suitable partial 16S rRNA gene regions for taxonomic studies and shows that unidirectional sequencing is enough when Sanger sequencing cloned 16S rRNA genes for taxonomic studies to genus level.info:eu-repo/semantics/publishedVersio

Ковид-19 и аутохтони народи: Aнализа из перспективе социјалне антропологије

: In this article we describe and analyze several impacts that coronavirus has produced over some aboriginal population from America and Argentina, taking into consideration, their responses, understanings and developed strategies, related to state policies. Likewise, we develop an analytical description of possibilities that the ethnographic method, belonging to the anthropological sciences, offers, for a multidimensional approach. This method also makes it possible to advise, evaluate and monitor certain public policies. When it comes to the information obtained, it was acquired using several secondary sources of data and interviews posted on the Internet.У овом раду описујемо и анализирамо неколико утицаја које је вирус корона имао на неке староседеоце из Америке и Аргентине, узимајући у обзир њихове одговоре, схватања и стратегије у вези са државном политиком. Исто тако, развијамо аналитички опис могућности које етнографски метод, који припада антрополошким наукама, нуди за вишедимензионални приступ. Овај метод такође омогућава саветовање, процену и праћење одређених јавних политика. С обзиром на добијене информације, до њих се дошло коришћењем неколико секундарних извора података и интервјуа који су објављени на интернету.Fil: Barandela, Ana Clara. Universidad de Buenos Aires; ArgentinaFil: Morey, Eugenia Maria Teresa. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Ciencias Antropológicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Murgida, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15; ArgentinaFil: Radovich, Juan Carlos. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin