Gestión de una comunidad profesional de aprendizaje para mejorar el desarrollo de las competencias del área de matemática en los estudiantes de la institución educativa N° 32061 - Francisco Bolognesi Cervantes - Chinchinga - San Pablo de Pillao – Huánuco

La investigación asumida por el colectivo de docentes del Nivel Primaria, en un esbozo de estudios, tiene la singular pero fundamental razón de fortalecer la práctica de la docencia, especialmente en el manejo del enfoque de las competencias de resolución de situaciones problemáticas de la Matemática y su incumbencia en los resultados de aprendizaje de los sujetos conformantes de nuestra institución educativa. Para tal efecto, las evidencias recolectadas como medio de información, cobraron su vigencia a través del monitoreo aunque escasa, pero trascendente para el caso, la interpretación de resultados internos, concursos y ECE en dicha materia. Se afirmó el manejo de todos estos elementos con la utilización de la encuesta y su respectivo cuestionario infiltrada para cada uno de los docentes, obteniendo valiosa información para el replanteo pedagógico en aula. Lo obtenido, en consideración a no ser un resultado, sino un proceso de implementación de una escuela que actúa como una Comunidad Profesional de Aprendizaje, institucionalizando una cultura con y por MAE, incorporando espacios de integración y presencia activa de los padres de familia en y para los aprendizajes de sus hijos.The research undertaken by the group of teachers of the Primary Level, in an outline of studies, has the unique but fundamental reason of strengthening the practice of teaching, especially in the handling of the approach of the competences of resolution of problematic situations of Mathematics and its incumbency in the learning results of the subjects that make up our educational institution. For this purpose, the evidence collected as a means of information, gained its validity through monitoring, although scarce, but transcendent for the case, the interpretation of internal results, contests and ECE in said matter. The management of all these elements was affirmed with the use of the survey and its respective infiltrated questionnaire for each of the teachers, obtaining valuable information for the pedagogical rethinking in the classroom. The obtained, in consideration of not being a result, but a process of implementation of a school that acts as a Professional Learning Community, institutionalizing a culture with and by MAE, incorporating spaces of integration and active presence of parents in and for their children's learning.Tesis de segunda especialida

Novel Insights into Regulation of Asparagine Synthetase in Conifers

Asparagine, a key amino acid for nitrogen storage and transport in plants, is synthesized via the ATP-dependent reaction catalyzed by the enzyme asparagine synthetase (AS; EC 6.3.5.4). In this work, we present the molecular analysis of two full-length cDNAs that encode asparagine synthetase in maritime pine (Pinus pinaster Ait.), PpAS1, and PpAS2. Phylogenetic analyses of the deduced amino acid sequences revealed that both genes are class II AS, suggesting an ancient origin of these genes in plants. A comparative study of PpAS1 and PpAS2 gene expression profiles showed that PpAS1 gene is highly regulated by developmental and environmental factors, while PpAS2 is expressed constitutively. To determine the molecular mechanisms underpinning the differential expression of PpAS1, the promoter region of the gene was isolated and putative binding sites for MYB transcription factors were identified. Gel mobility shift assays showed that a MYB protein from Pinus taeda (PtMYB1) was able to interact with the promoter region of PpAS1. Furthermore, transient expression analyses in pine cells revealed a negative effect of PtMYB1 on PpAS1 expression. The potential role of MYB factors in the transcriptional regulation of PpAS1 in vascular cells is discussed

Educación Superior en cambio. Desafíos y perspectivas de las instituciones universitarias

El Proyecto, se presenta como un espacio de investigación e innovación, formación, trabajo en el terreno y diálogo entre los actores sociales e institucionales implicados. Su objetivo principal es el de analizar, a la luz de su desarrollo histórico y su constitución al presente, el dispositivo conformado por el juego de relaciones existentes entre las políticas de educación superior de carácter federal, la realidad de las instituciones universitarias de carácter localizado y las dinámicas cotidianas que en ellas acontecen en las últimas décadas. El Estado, el Mercado, la Institución Universidad y los Sujetos, como así también el conjunto de regulaciones que se operan entre cada uno de estos componentes serán, a la luz de lo antes expresado, unidades claves de esta investigación. Pretende contribuir a un mayor entendimiento de los espacios, situaciones de diálogo y concertación de nuevas oportunidades educativas en el nivel superior. El reconocimiento de la identidad institucional, de las dinámicas de cambio, del juego de desafíos a asumir y de las perspectivas que dibujan una prospectiva educativa, se instauran como piedras fundacionales sobre las que apoya el edificio y la construcción de un proyecto educativo institucional: en este caso el de la Facultad de Educación. Los resultados de trabajo se encuentran orientados principalmente a los tomadores de decisiones institucionales, a los actores directos que conforman la institución educativa, a la apertura de nuevas líneas de investigación, como así también a brindar una mirada esclarecedora sobre el oficio que la Facultad de Educación ejerce en el medio social en el que actúa

The glutamine synthetase gene family in Populus

<p>Abstract</p> <p>Background</p> <p>Glutamine synthetase (GS; EC: 6.3.1.2, L-glutamate: ammonia ligase ADP-forming) is a key enzyme in ammonium assimilation and metabolism of higher plants. The current work was undertaken to develop a more comprehensive understanding of molecular and biochemical features of <it>GS </it>gene family in poplar, and to characterize the developmental regulation of <it>GS </it>expression in various tissues and at various times during the poplar perennial growth.</p> <p>Results</p> <p>The <it>GS </it>gene family consists of 8 different genes exhibiting all structural and regulatory elements consistent with their roles as functional genes. Our results indicate that the family members are organized in 4 groups of duplicated genes, 3 of which code for cytosolic GS isoforms (GS1) and 1 which codes for the choroplastic GS isoform (GS2). Our analysis shows that <it>Populus trichocarpa </it>is the first plant species in which it was observed the complete <it>GS </it>family duplicated. Detailed expression analyses have revealed specific spatial and seasonal patterns of <it>GS </it>expression in poplar. These data provide insights into the metabolic function of GS isoforms in poplar and pave the way for future functional studies.</p> <p>Conclusions</p> <p>Our data suggest that <it>GS </it>duplicates could have been retained in order to increase the amount of enzyme in a particular cell type. This possibility could contribute to the homeostasis of nitrogen metabolism in functions associated to changes in glutamine-derived metabolic products. The presence of duplicated <it>GS </it>genes in poplar could also contribute to diversification of the enzymatic properties for a particular GS isoform through the assembly of GS polypeptides into homo oligomeric and/or hetero oligomeric holoenzymes in specific cell types.</p

Elevated CO2 improved the growth of a double nitrate reductase defective mutant of Arabidopsis thaliana: the importance of maintaining a high energy status

Impairments in leaf nitrogen (N) assimilation in C3 plants have been identified as processes conditioning photosynthesis under elevated [CO2], especially when N is supplied as nitrate. Leaf N status is usually improved under ammonium nutrition and elevated [CO2]. However, ammonium fertilization is usually accompanied by the appearance of oxidative stress symptoms, which constrains plant development. To understand how the limitations of direct fertilization with ammonium (growth reduction attributed to ammonium toxicity) can be overcome, the effects of elevated [CO2] (800 ppm) exposure were studied in the Arabidopsis thaliana double nitrate reductase defective mutant, nia1-1/chl3-5 (which preferentially assimilates ammonium as its nitrogen source). Analysis of the physiology, metabolites and gene expression was carried out in roots and shoot organs. Our study clearly showed that elevated [CO2] improved the inhibited phenotype of the nitrate reductase double mutant. Both the photosynthetic rates and the leaf N content of the NR mutant under elevated CO2 were similar to wild type plants. The growth of the nitrate reductase mutant was linked to its ability to overcome ammonium-associated photoinhibition processes at 800 ppm [CO2]. More specifically: (i) the capacity of NR mutants to equilibrate energy availability, as reflected by the electron transport equilibrium reached (photosynthesis, photorespiration and respiration), (ii) as well as by the upregulation of genes involved in stress tolerance were identified as the processes involved in the improved performance of NR mutants

Role of the Pi3k Regulatory Subunit in the Control of Actin Organization and Cell Migration

Cell migration represents an important cellular response that utilizes cytoskeletal reorganization as its driving force. Here, we describe a new signaling cascade linking PDGF receptor stimulation to actin rearrangements and cell migration. We demonstrate that PDGF activates Cdc42 and its downstream effector N-WASP to mediate filopodia formation, actin stress fiber disassembly, and a reduction in focal adhesion complexes. Induction of the Cdc42 pathway is independent of phosphoinositide 3-kinase (PI3K) enzymatic activity, but it is dependent on the p85α regulatory subunit of PI3K. Finally, data are provided showing that activation of this pathway is required for PDGF-induced cell migration on collagen. These observations show the essential role of the PI3K regulatory subunit p85α in controlling PDGF receptor–induced cytoskeletal changes and cell migration, illustrating a novel signaling pathway that links receptor stimulation at the cell membrane with actin dynamics

Educación Superior en cambio. Desafíos y perspectivas de las instituciones universitarias

El Proyecto, se presenta como un espacio de investigación e innovación, formación, trabajo en el terreno y diálogo entre los actores sociales e institucionales implicados. Su objetivo principal es el de analizar, a la luz de su desarrollo histórico y su constitución al presente, el dispositivo conformado por el juego de relaciones existentes entre las políticas de educación superior de carácter federal, la realidad de las instituciones universitarias de carácter localizado y las dinámicas cotidianas que en ellas acontecen en las últimas décadas. El Estado, el Mercado, la Institución Universidad y los Sujetos, como así también el conjunto de regulaciones que se operan entre cada uno de estos componentes serán, a la luz de lo antes expresado, unidades claves de esta investigación. Pretende contribuir a un mayor entendimiento de los espacios, situaciones de diálogo y concertación de nuevas oportunidades educativas en el nivel superior. El reconocimiento de la identidad institucional, de las dinámicas de cambio, del juego de desafíos a asumir y de las perspectivas que dibujan una prospectiva educativa, se instauran como piedras fundacionales sobre las que apoya el edificio y la construcción de un proyecto educativo institucional: en este caso el de la Facultad de Educación. Los resultados de trabajo se encuentran orientados principalmente a los tomadores de decisiones institucionales, a los actores directos que conforman la institución educativa, a la apertura de nuevas líneas de investigación, como así también a brindar una mirada esclarecedora sobre el oficio que la Facultad de Educación ejerce en el medio social en el que actúa.Fil: Vitarelli, Marcelo Fabián. Universidad Católica de Córdoba. Facultad de Educación; ArgentinaFil: Manitta, Aída Isabel. Universidad Católica de Córdoba. Facultad de Educación; ArgentinaFil: Bonetti, Olga Concepción. Universidad Católica de Córdoba. Facultad de Educación; ArgentinaFil: Avila Paz, María Cecilia. Universidad Católica de Córdoba. Facultad de Educación; Argentin

Influence of Physical Activity on Bone Mineral Content and Density in Overweight and Obese Children with Low Adherence to the Mediterranean Dietary Pattern.

The objective of the present cross-sectional study was to examine the associations of physical activity and the adherence to the Mediterranean dietary pattern (MDP) with bone mineral content (BMC) and density (BMD) in children with overweight and obesity. A total of 177 (n = 80 girls) children with overweight and obesity aged 8 to 12 years old participated in the study. Both BMC and BMD were assessed by Dual-Energy X-ray absorptiometry. Dietary patterns were assessed by the KIDMED questionnaire and two 24-hour recalls. Physical activity was assessed by accelerometers for 7 consecutive days (24 hours/day). Low adherence to the MDP was observed in 82.4% of participants. Higher physical activity levels (of at least moderate intensity) and lower sedentary time were significantly associated with BMC and BMD in children with low adherence to the MDP (all p < 0.05). No associations were observed between physical activity and BMC and BMD in children with high adherence to the MDP. In conclusion, engaging in moderate to vigorous physical activity and reducing the time spent in sedentary behavior might be particularly beneficial for improving bone health in overweight or obese children with poor adherence to the Mediterranean dietary pattern.The ActiveBrains Project was funded by the Spanish Ministry of Economy and Competitiveness (Reference DEP2013-47540 and DEP2016-79512-R). EFIGRO was supported by the Spanish Ministry of Health, “Fondo de Investigación Sanitaria del Instituto de Salud Carlos III” (PI13/01335), “Fondos Estructurales de la Unión Europea (FEDER), Una manera de hacer Europa”, by the University of the Basque Country (GIU14/21), and by the University of Granada, Plan Propio de Investigación 2016, Excellence actions: Units of Excellence; Unit of Excellence on Exercise and Health (UCEES). LGM is funded by Programa de Captación de Talento-UGR Fellows. MM is supported by grant from the Spanish Ministry of Education, Culture and Sport (FPU14/03329) and EST17/00210. LA is supported by a grant from Education, Linguistic Policy, and Culture Department of the Government of the Basque Country (PRE_2016_1_0057)

Nitrogen Metabolism and Biomass Production in Forest Trees

Low nitrogen (N) availability is a major limiting factor for tree growth and development. N uptake, assimilation, storage and remobilization are key processes in the economy of this essential nutrient, and its efficient metabolic use largely determines vascular development, tree productivity and biomass production. Recently, advances have been made that improve our knowledge about the molecular regulation of acquisition, assimilation and internal recycling of N in forest trees. In poplar, a model tree widely used for molecular and functional studies, the biosynthesis of glutamine plays a central role in N metabolism, influencing multiple pathways both in primary and secondary metabolism. Moreover, the molecular regulation of glutamine biosynthesis is particularly relevant for accumulation of N reserves during dormancy and in N remobilization that takes place at the onset of the next growing season. The characterization of transgenic poplars overexpressing structural and regulatory genes involved in glutamine biosynthesis has provided insights into how glutamine metabolism may influence the N economy and biomass production in forest trees. Here, a general overview of this research topic is outlined, recent progress are analyzed and challenges for future research are discussed