Jóvenes (re) escolarizados: un análisis de los motivos de la vuelta al colegio

Este trabajo está integrado por un acotado número de entrevistas realizadas en diferentes Centros Educativos de Nivel Secundario (CENS) de la Capital Federal, entre abril y mayo de 2003. Los CENS, dependientes de la Dirección del Área de Educación del Adulto y del Adolescente del Gobierno de la Ciudad de Buenos Aires, están destinados a personas mayores de 18 años cuyo objetivo es empezar, retomar o concluir los estudios de nivel medio. En este artículo revisaremos los principales ejes de indagación sobre los que se basaron las entrevistas para llegar a la formulación de hipótesis (y no conclusiones definidas y definitivas) que permitan abrir espacio a futuras investigaciones. Tales ejes fueron: la deserción, la decisión de la vuelta, y los factores sociales y culturales de los sujetos. Estos últimos tienen gran influencia tanto en la deserción como en la decisión de retomar los estudios, ya que los sujetos están materialmente condicionados en función de las relaciones entre el tiempo libre para “prolongar su esfuerzo de adquisición” y la necesidad económica (Bourdieu, s/f). Por caso, encontramos esta relación en Juan (33), quien relató que para poder empezar a estudiar necesitó de una organización que incluía los horarios de trabajo y la satisfacción de necesidades familiares básicas, y en Andrés (29), para quien constituyó también uno de los motivos de la vuelta al colegio: “Ya me estabilicé un poquito, gracias a Dios, y lo primero que hice cuando estuve, más o menos, estable fue anotarme”. (Párrafo extraído del texto a modo de resumen)Facultad de Periodismo y Comunicación Socia

Jóvenes (re) escolarizados: un análisis de los motivos de la vuelta al colegio

Este trabajo está integrado por un acotado número de entrevistas realizadas en diferentes Centros Educativos de Nivel Secundario (CENS) de la Capital Federal, entre abril y mayo de 2003. Los CENS, dependientes de la Dirección del Área de Educación del Adulto y del Adolescente del Gobierno de la Ciudad de Buenos Aires, están destinados a personas mayores de 18 años cuyo objetivo es empezar, retomar o concluir los estudios de nivel medio. En este artículo revisaremos los principales ejes de indagación sobre los que se basaron las entrevistas para llegar a la formulación de hipótesis (y no conclusiones definidas y definitivas) que permitan abrir espacio a futuras investigaciones. Tales ejes fueron: la deserción, la decisión de la vuelta, y los factores sociales y culturales de los sujetos. Estos últimos tienen gran influencia tanto en la deserción como en la decisión de retomar los estudios, ya que los sujetos están materialmente condicionados en función de las relaciones entre el tiempo libre para “prolongar su esfuerzo de adquisición” y la necesidad económica (Bourdieu, s/f). Por caso, encontramos esta relación en Juan (33), quien relató que para poder empezar a estudiar necesitó de una organización que incluía los horarios de trabajo y la satisfacción de necesidades familiares básicas, y en Andrés (29), para quien constituyó también uno de los motivos de la vuelta al colegio: “Ya me estabilicé un poquito, gracias a Dios, y lo primero que hice cuando estuve, más o menos, estable fue anotarme”. (Párrafo extraído del texto a modo de resumen)Facultad de Periodismo y Comunicación Socia

PLLA/Triethyl citrate membrane as an alternative for the treatment of skin wounds

Bioresorbable polymers can be applied as membranes to sustain and guide cell growth through the regeneration process. This study evaluated poly(acid lactide), PLLA, membranes with addition of 10% triethyl citrate as skin wound healing in Wistar rats. Initially a 2cm² skin wound was exercised of the back of 24 animals. The animals were divided into two groups: treated, whose the polymer membrane was implanted, and control, in which the wound was kept exposed. The results obtained after 1, 3, 7 and 15 days showed an inflammatory response more satisfactory in the implanted wounds, with early repair and collagen more organized when compared to exposed wounds. In addition to, the protected areas showed no irritant inflammatory response which could be attributed to the membrane. Thus, we conclude that the PLLA/Triethyl citrate membrane has effectively protected the wounds, allowing the repair and presenting itself as a promising skin dressing.Polímeros sintéticos biorreabsorvíveis podem ser utilizados sob a forma de membranas para sustentar e guiar o crescimento celular, através do processo de reparação tecidual. Este trabalho avaliou membranas de poli(ácido lático), PLLA, com adição de 10% de trietil-citrato usadas como curativos de feridas cutâneas agudas em ratos Wistar. Inicialmente uma ferida de 2cm² foi provocada na região dorsal de 24 animais. Estes foram divididos em 2 grupos: tratamento, nos quais as feridas foram recobertas pela membrana polimérica e controle, com feridas permanecendo cruentas. Os resultados obtidos em 1, 3, 7 e 15 dias mostraram uma resposta inflamatória mais satisfatória nas feridas protegidas pelas membranas, com reparação precoce e colágeno mais organizado quando comparadas com as áreas incialmente mantidas sem proteção. Além do que, as áreas protegidas pelas membranas não mostraram alterações inflamatórias irritativas que pudessem ser imputadas ao uso da membrana polimérica. Diante disso, conclui-se que a membrana de PLLA/Trietil-citrato protegeu efetivamente as feridas, permitindo o processo de reparação e mostrando-se promissora como curativo cutâneo.798806Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

neXtProt: a knowledge platform for human proteins

neXtProt (http://www.nextprot.org/) is a new human protein-centric knowledge platform. Developed at the Swiss Institute of Bioinformatics (SIB), it aims to help researchers answer questions relevant to human proteins. To achieve this goal, neXtProt is built on a corpus containing both curated knowledge originating from the UniProtKB/Swiss-Prot knowledgebase and carefully selected and filtered high-throughput data pertinent to human proteins. This article presents an overview of the database and the data integration process. We also lay out the key future directions of neXtProt that we consider the necessary steps to make neXtProt the one-stop-shop for all research projects focusing on human proteins

Measurement of the Electric Form Factor of the Neutron at Q^2=0.5 and 1.0 (GeV/c)^2

The electric form factor of the neutron was determined from measurements of the \vec{d}(\vec{e},e' n)p reaction for quasielastic kinematics. Polarized electrons were scattered off a polarized deuterated ammonia target in which the deuteron polarization was perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons in a large solid angle detector. We find G_E^n = 0.0526 +/- 0.0033 (stat) +/- 0.0026 (sys) and 0.0454 +/- 0.0054 +/- 0.0037 at Q^2 = 0.5 and 1.0 (GeV/c)^2, respectively.Comment: 5 pages, 2 figures, as publishe

HFR1 Is Crucial for Transcriptome Regulation in the Cryptochrome 1-Mediated Early Response to Blue Light in Arabidopsis thaliana

Cryptochromes are blue light photoreceptors involved in development and circadian clock regulation. They are found in both eukaryotes and prokaryotes as light sensors. Long Hypocotyl in Far-Red 1 (HFR1) has been identified as a positive regulator and a possible transcription factor in both blue and far-red light signaling in plants. However, the gene targets that are regulated by HFR1 in cryptochrome 1 (cry1)-mediated blue light signaling have not been globally addressed. We examined the transcriptome profiles in a cry1- and HFR1-dependent manner in response to 1 hour of blue light. Strikingly, more than 70% of the genes induced by blue light in an HFR1-dependent manner were dependent on cry1, and vice versa. High overrepresentation of W-boxes and OCS elements were found in these genes, indicating that this strong cry1 and HFR1 co-regulation on gene expression is possibly through these two cis-elements. We also found that cry1 was required for maintaining the HFR1 protein level in blue light, and that the HFR1 protein level is strongly correlated with the global gene expression pattern. In summary, HFR1, which is fine-tuned by cry1, is crucial for regulating global gene expression in cry1-mediated early blue light signaling, especially for the function of genes containing W-boxes and OCS elements

The UniProt-GO Annotation database in 2011

The GO annotation dataset provided by the UniProt Consortium (GOA: http://www.ebi.ac.uk/GOA) is a comprehensive set of evidenced-based associations between terms from the Gene Ontology resource and UniProtKB proteins. Currently supplying over 100 million annotations to 11 million proteins in more than 360 000 taxa, this resource has increased 2-fold over the last 2 years and has benefited from a wealth of checks to improve annotation correctness and consistency as well as now supplying a greater information content enabled by GO Consortium annotation format developments. Detailed, manual GO annotations obtained from the curation of peer-reviewed papers are directly contributed by all UniProt curators and supplemented with manual and electronic annotations from 36 model organism and domain-focused scientific resources. The inclusion of high-quality, automatic annotation predictions ensures the UniProt GO annotation dataset supplies functional information to a wide range of proteins, including those from poorly characterized, non-model organism species. UniProt GO annotations are freely available in a range of formats accessible by both file downloads and web-based views. In addition, the introduction of a new, normalized file format in 2010 has made for easier handling of the complete UniProt-GOA data set

PIF Genes Mediate the Effect of Sucrose on Seedling Growth Dynamics

As photoautotrophs, plants can use both the form and amount of fixed carbon as a measure of the light environment. In this study, we used a variety of approaches to elucidate the role of exogenous sucrose in modifying seedling growth dynamics. In addition to its known effects on germination, high-resolution temporal analysis revealed that sucrose could extend the number of days plants exhibited rapid hypocotyl elongation, leading to dramatic increases in ultimate seedling height. In addition, sucrose changed the timing of daily growth maxima, demonstrating that diel growth dynamics are more plastic than previously suspected. Sucrose-dependent growth promotion required function of multiple phytochrome-interacting factors (PIFs), and overexpression of PIF5 led to growth dynamics similar to plants exposed to sucrose. Consistent with this result, sucrose was found to increase levels of PIF5 protein. PIFs have well-established roles as integrators of response to light levels, time of day and phytohormone signaling. Our findings strongly suggest that carbon availability can modify the known photomorphogenetic signaling network