2,491 research outputs found

    Middle Ordovician conodonts and graptolites at Los Cauquenes range, central Precordillera of San Juan, Argentina

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    The Ordovician System is superbly represented in the Precordillera of western Argentina, at the Andean foothills. During the Middle Ordovician, an important paleogeographical rearrangement of depocenters and source areas took place associated with the demise of the Eopaleozoic carbonate platform of the Precordillera. This critical interval is recorded in the basin through widespread deposition of black shales over the fossiliferous limestones of the San Juan Formation, punctuated by local deposition of olistostromes, debris flows, conglomerates, and turbidites (e.g., Astini et al., 1995; Keller, 1999). Fossil dating of the lowest black shales and equivalent units indicates a diachronous deposition from north to south in the Precordillera basin (Hünicken, 1985; Albanesi et al., 1998).Fil: Voldman, Gustavo Gabriel. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Museo de Paleontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; ArgentinaFil: Ortega, Gladys del Carmen. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Museo de Paleontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Albanesi, Guillermo Luis. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Museo de Paleontología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentin

    Architectural Graphic Expression of Heritage in the Academic Training of Architects. The Exhibition of the Drawings

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    The teaching and learning experiences carried out during the 2017/18 academic year, in all the subjects of the Architectural Graphic Expression area that are taught at the School of Architecture of the University of Granada, were shown in the exhibition entitled “Architect Training in Architectural Graphic Expression”, held between 27 November 2019 and 29 January 2020. The main objective of the exhibition was to bring the student of architecture closer to the complex meaning of heritage, through a complete graphic immersion in the context of the buildings studied. In the methodology followed, heritage is used as a teaching-learning model, selecting historical or contemporary architectural landmarks for eld or laboratory practices that, thanks to the cross-curricular aspect of the subjects of the degree in Architecture, the student will know in all their dimensions: graphic, project, historical and constructive. The graphic results, duly exhibited, were a valuable tool for knowledge and dissemination both for students and teachers, as well as for other professionals who visited the exhibition.Departamento de Expresión Gráfica Arquitectónica y en la IngenieríaUniversidad de Granad

    A novel lncRNA as a positive regulator of carotenoid biosynthesis in Fusarium

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    The fungi Fusarium oxysporum and Fusarium fujikuroi produce carotenoids, lipophilic terpenoid pigments of biotechnological interest, with xanthophyll neurosporaxanthin as the main end product. Their carotenoid biosynthesis is activated by light and negatively regulated by the RING-finger protein CarS. Global transcriptomic analysis identified in both species a putative 1-kb lncRNA that we call carP, referred to as Fo-carP and Ff-carP in each species, upstream to the gene carS and transcribed from the same DNA strand. Fo-carP and Ff-carP are poorly transcribed, but their RNA levels increase in carS mutants. The deletion of Fo-carP or Ff-carP in the respective species results in albino phenotypes, with strong reductions in mRNA levels of structural genes for carotenoid biosynthesis and higher mRNA content of the carS gene, which could explain the low accumulation of carotenoids. Upon alignment, Fo-carP and Ff-carP show 75-80% identity, with short insertions or deletions resulting in a lack of coincident ORFs. Moreover, none of the ORFs found in their sequences have indications of possible coding functions. We conclude that Fo-carP and Ff-carP are regulatory lncRNAs necessary for the active expression of the carotenoid genes in Fusarium through an unknown molecular mechanism, probably related to the control of carS function or expressio

    Arreta, pertzepzioa eta motibazioa. Lan koadernoa

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    78 p.Lan koaderno hau Euskal Herriko Unibertsitateko (EHU) Psikologiako Graduko lehen mailako ikasleei zuzenduta dago, bereziki Arreta, pertzepzioa eta Motibazioa irakasgaiko ikasleei. Lan hau «Arreta, pertzepzioa eta Motibazioa irakasgaiaren ikasmaterialaren liburuxka» liburu teorikoa osatzera dator. Irakasgai honetarako material berriak sortu beharra ulertzeko, ezinbestean aipatu behar da zer testuingurutan suertatu den behar hori. Izan ere, Europako Unibertsitate Eremuaren eraikuntzarekin, 2010. urteaz geroztik, Europako beste unibertsitate guztiak bezala, EHU Bologna izeneko plan horretan sartu zen; goi mailako erregulazio horrek aldaketa ugari ekarri du; besteak beste, irakaskuntza eskaintza berriztatzeko aukera eman zuen, graduen eraketarekin. Horrela, Psikologiako Graduan, historikoki batera ikasten ez ziren hiru prozesu (Arreta, Pertzepzioa eta Motibazioa) irakasgai bakar batean uztartu ziren

    PHYSICAL SELF-CONCEPT OF MEXICAN ATHLETE AND NON-ATHLETE TEENAGERS

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    The purpose of this study consists of outlining the differences and similarities between elementary and junior-high school Mexican students’ physical self-concept based on the variables of those who practice a sport on a regular basis and those who do not do. A total sample of 596 male students, between the ages of 11-16 participated in this study; 270 of them practice a sport and participate regularly in tournaments or competitions. A quantitative approach with a descriptive and transversal survey design was used. All the participants completed the Physical Self-Description Questionnaire. The results of the one-way multivariate analysis of variance, followed by the oneway univariate analyses of variance, show that students who do not participate in sports regularly are the ones who obtained lower scores on the coordination, activity, sports competence, appearance, strength, flexibility, endurance, global physical self-concept, and global self-esteem subscales. However, in the health subscale, statistically significant differences were not found. Further research should seek these findings in larger samples

    Resiliencia en Pacientes Pediátricos Sobrevivientes de Quemaduras

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    ResumenLas lesiones por quemaduras se consideran como unas de las lesiones más traumáticas que los niños pueden enfrentar y sus consecuencias van más allá de los problemas físicos, por lo qué conocer el ajuste positivo después de una quemadura resulta de gran importancia. Los objetivos de este estudio fueron identificar los niveles de resiliencia de un grupo de pacientes pediátricos sobrevivientes de quemaduras y evaluar las diferencias de acuerdo al sexo. Consistió en un estudio transversal en donde se evaluó a 57 niños y adolescentes sobrevivientes de quemaduras, quienes acudieron al Servicio de cirugía plástica del Hospital Universitario de la UANL. Los resultados mostraron que los niños y adolescentes de este estudio reportaron un alto nivel de resiliencia, por lo que puede concluirse que experimentar un evento traumático o devastador no necesariamente conlleva a presentar consecuencias negativas en el funcionamiento psicológico o comportamental.AbstractBurn injuries are considered one of the most traumatic injuries a child or adolescent may experience and their consequences go beyond the physical problems, therefore the knowledge of positive adjustment after a burn is important. The aims of this study were to identify the levels of resilience in a group of pediatric burn survivors and to evaluate the differences by sex. This was a cross-sectional study in which 57 children and adolescents burn survivors, who attended to the Plastic Surgery Service of the UANL University Hospital, were evaluated. The results showed that children and adolescents of this study reported a high level of resilience, so it can be concluded that experiencing a traumatic or devastating event does not necessarily leads to negative consequences in psychological or behavioral functioning

    Néoliberalisme et Droit: Les réformes de la politique financière de change de 1977-1978 et l’endettement de L’État National

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    Este artículo analiza las reformas legales-institucionales que se realizaron en los ámbitos financiero y cambiario en los años 1977-1978 y sus implicancias en términos de endeudamiento del Estado Argentino. A tal fin, y en primer lugar, presenta los cambios que se sucedieron en el sistema financiero internacional durante la década de los 70 y muestra, en segundo lugar, como éstos influyeron en nuestro país dando nacimiento a un nuevo "Derecho neoliberal"; Derecho en virtud del cual se instrumentalizaron las reformas aludidas. En tercer y último lugar, explica como estas últimas coadyuvaron a producir un abrupto y anormal crecimiento de la deuda externa nacional; deuda externa que continúa condicionando, y en buena medida, nuestra realidad económica y política actual.Este artigo analisa as reformas institucionais-legais que foram realizadas nos âmbitos financeiro e cambial nos anos 1977-1978 e suas implicações em termos de endividamento do Estado argentino. Com esse fim, e em primeiro lugar, apresenta as mudanças que se sucederam no sistema financeiro internacional durante a década de 1970 e mostra, em segundo lugar, como estas influenciaram em nosso país dando origem a um novo “Direito neoliberal”; Direito em virtude do qual foram instrumentalizadas as reformas aludidas. Em terceiro e último lugar, explica como estas últimas colaboraram para produzir um abrupto e anormal crescimento da dívida externa nacional; dívida externa que continua condicionando, em grande medida, nossa realidade econômica e política atual.This article analyses the 1977-78 institutional and legal reforms in finance and foreign exchange and their implications for Argentina’s public debt. First, the article presents the changes in the global financial system during the 1970s and second, it shows how they influenced our country and gave rise to “Neoliberal law” which permitted the aforementioned reforms. Third and finally, the article explains how these last factors combined to produce an abrupt and abnormal growth in national foreign debt; a debt which continues to greatly affect our present economic and political realities.Cet article analyse les réformes institutionnelles et légales des politiques financières de change dans les années 1977-1978 et leurs implications en termes d’endettement de l’État Argentin. À cette fin, nous présenterons tout d’abord les changements successifs au sein du système financier international dans les années 1970 et nous montrerons ensuite leurs répercussions sur notre pays, qui donnèrent lieu à un nouveau « droit néolibéral », un droit en vertu duquel furent mises en œuvre les réformes susmentionnées. En troisième et dernier lieu, nous expliquerons comment celles-ci ont collaboré à une augmentation anormale et brutale de la dette extérieure nationale, qui continue d’influer fortement sur notre réalité économique et politique actuelle.Fil: Manzo, Alejandro Gabriel. Universidad Nacional de Córdoba. Centro de Investigaciones Jurídicas y Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones Jurídicas y Sociales; ArgentinaFil: Gonzalez Salva, Cecilia del Carmen. Universidad Nacional de Córdoba. Centro de Investigaciones Jurídicas y Sociales. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones Jurídicas y Sociales; Argentin

    Impact of the White Collar Photoreceptor WcoA on the Fusarium fujikuroi Transcriptome

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    The proteins of the White Collar 1 family (WC) constitute a major class of flavin photoreceptors, widely distributed in fungi, that work in cooperation with a WC 2 protein forming a regulatory complex. The WC complex was investigated in great detail in Neurospora crassa, a model fungus in photobiology studies, where it controls all its major photoresponses. The fungus Fusarium fujikuroi, a model system in the production of secondary metabolites, contains a single WC-1 gene called wcoA. The best-known light response in this fungus is the photoinduction of the synthesis of carotenoids, terpenoid pigments with antioxidant properties. Loss of WcoA in F. fujikuroi results in a drastic reduction in the mRNA levels of the carotenoid genes, and a diversity of morphological and metabolic changes, including alterations in the synthesis of several secondary metabolites, suggesting a complex regulatory role. To investigate the function of WcoA, the transcriptome of F. fujikuroi was analyzed in the dark and after 15-, 60- or 240-min illumination in a wild strain and in a formerly investigated wcoA insertional mutant. Using a threshold of four-fold change in transcript levels, 298 genes were activated and 160 were repressed in the wild strain under at least one of the light exposures. Different response patterns were observed among them, with genes exhibiting either fast, intermediate, and slow photoinduction, or intermediate or slow repression. All the fast and intermediate photoresponses, and most of the slow ones, were lost in the wcoA mutant. However, the wcoA mutation altered the expression of a much larger number of genes irrespective of illumination, reaching at least 16% of the annotated genes in this fungus. Such genes include many related to secondary metabolism, as well as others related to photobiology and other cellular functions, including the production of hydrophobins. As judged by the massive transcriptomic changes exhibited by the wcoA mutant in the dark, the results point to WcoA as a master regulatory protein in F. fujikuroi, in addition to a central function as the photoreceptor responsible for most of the transcriptional responses to light in this fungus.España Ministerio de Economía y Competitividad, grant BIO2015-69613-RMinisterio de Ciencia e Innovación , MCI, Agencia Estatal de Investigación, AEI, and Fondo Europeo de Desarrollo Regional, FEDER, grant RTI2018-101902-B-I00)España Ministerio de Economía y Competitividad, grant BIO2015-71703-RED

    Aristotelismo y ciencia moderna en la Nueva España. El De philosophiae vicissitudinibus del jesuita guanajuatense Andrés de Guevara y Basoazábal

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    Andrés de Guevara y Basoazábal (1748-1801), jesuita novohispano guanajuatense, escribió las Institutionum elementarium philosophiae, donde su autor ofrece un currículo deseable para la juventud mexicana que incluya la ciencia moderna empírica, la política virtuosa y la sabiduría humana. A través de una traducción comparativa del latín al español del proemio de la citada obra, este artículo pretende: 1) contextualizar al autor novohispano, 2) mostrar la recepción de la ciencia moderna desde los elementos aristotélicos de los que Guevara dispuso, y 3) mostrar que la modernidad y la tradición aristotélica se enriquecieron mutuamente; y lo que debía de reformarse era la escolástica anquilosada. Se concluye que a través del proemio De vicissitundinibus de Guevara se evidencia la recepción mexicana de la modernidad emanada de una mentalidad aristotélica

    Activated char from the co-pyrolysis of polystyrene and olive stone mixtures for the adsorption of CO2

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    Yogurt plastic containers made of polystyrene (PS), olive stone, and mixtures of both have been converted into activated carbon materials transforming them firstly into char via pyrolysis and secondly with activation using either KOH or H2SO4. The pyrolysis of the olive stone gave a higher yield of material than the plastic PS. However, the activation of the PS char with KOH was more effective, reaching surface areas of 508 vs 194 m2 g−1 of the corresponding prepared with olive stone. The prepared materials were tested as CO2 adsorbent in thermobalance and fixed-be column assays. The materials activated with H2SO4 slightly enhanced the adsorption ability of the original char but were far from the performance obtained with KOH activation. The CO2 isotherms showed high synergy of CO2 uptake and selectivity when using activated chars prepared with the char from the mixture of raw materials, specially at a 1:1 mass ratio. The isosteric heat of adsorption values were those expected for a physisorption process. Further experiments in a fixed-bed column were also studied at atmospheric pressure at different inlet CO2 concentrations (10–50%). The CO2 retention increased as the partial CO2 pressure rose. Besides, a very similar performance of the material prepared with plastic and olive stones was obtained at 50%, i.e. 220 and 197 mg g−1 respectively. At low CO2 concentrations, the materials enriched with plastic displayed better performance than those prepared with olive stone. Cycles of adsorption-desorption were carried out in the column to assess the stability of the materials. The curves obtained did not display any substantial change, demonstrating the lack of adsorption retention
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