Las variaciones del tiempo en Mendoza en la primavera-verano 1963-64

Fil: Pérez de Scaraffia, Alicia. Universidad Nacional de Cuy

Y provincial censo de población 1970 : panorama nacional

Fil: Pérez de Scaraffia, Alicia

A. Perpillou, L. Pernet y A. C. Rampa, Geografía dinámica general. Asia y África, Buenos Aires, Ed. Kapeluz, 1962.

Fil: Pérez de Scaraffia, Alicia. Universidad Nacional de Cuyo. Facultad de Filosofía y Letra

Motivación en jugadores de básquetbol profesional

El siguiente trabajo se divide en dos partes: la primera consta del marco teórico y la segunda del marco metodológico. Ambos apartados se subdividen en nueve capítulos indicados con números romanos. Dentro del primer apartado se desarrolla el deporte como disciplina, realizando una breve introducción del término. Luego se abre uno de los temas principales de esta investigación, el básquetbol, haciendo un recorrido desde su historia, tipos de competencia hasta llegar a la actualidad de nuestro básquetbol local. Posteriormente se desarrolla la psicología del deporte con sus conceptos principales, fundamentalmente haciendo hincapié en el rol del psicólogo dentro de esta área. Finalmente, nos adentramos en los temas centrales de la investigación, estos son: equipos deportivos con sus distintas clasificaciones, motivación focalizada desde el abordaje de la psicología del deporte y por último el establecimiento de objetivos deportivos explicando sus diferentes tipos. En el segundo apartado se trabaja con la metodología empleada, especificando el problema, objetivos del trabajo, tipo de investigación, características de la muestra seleccionada y los instrumentos utilizados. Luego de esto se realiza la presentación de resultados, el análisis de los mismos para culminar con las conclusiones finales del trabajo.The following paper is divided into two parts: the first consists of theoretical and methodological framework of the second. Both sections are divided into nine chapters marked with roman numerals. In the first section develops the sport as a discipline, will provide a brief introduction of the term. Then he opens one of the main themes of this research, the Basketball, making a journey from its history, types of competition to reach the actuality of our local basketball. Later develops sport psychology with its main concepts, mainly emphasizing the role of psychologists in this area. Finally, we move into the central themes of research, these are: Sports equipment with their different classifications, Motivation focused from the approach to sport psychology and finally the Sports Setting Objectives explaining the different types. In the second section works with the methodology used, specifying the problem, work objectives, type of research, characteristics of the sample and the instruments used. After this is done the presentation of results, analysis of them culminating in the final conclusions of the work.Fil: Scaraffia, Diego Santiag

Bruniano, E . Climatología. Procesos y tipos climáticos. Buenos Aires. Col. Geográfica. Ed. CEYNE. 1992. 125 p.

Fil: Pérez de Scaraffia, Alicia

Metabolic Complementarity and Genomics of the Dual Bacterial Symbiosis of Sharpshooters

Mutualistic intracellular symbiosis between bacteria and insects is a widespread phenomenon that has contributed to the global success of insects. The symbionts, by provisioning nutrients lacking from diets, allow various insects to occupy or dominate ecological niches that might otherwise be unavailable. One such insect is the glassy-winged sharpshooter (Homalodisca coagulata), which feeds on xylem fluid, a diet exceptionally poor in organic nutrients. Phylogenetic studies based on rRNA have shown two types of bacterial symbionts to be coevolving with sharpshooters: the gamma-proteobacterium Baumannia cicadellinicola and the Bacteroidetes species Sulcia muelleri. We report here the sequencing and analysis of the 686,192–base pair genome of B. cicadellinicola and approximately 150 kilobase pairs of the small genome of S. muelleri, both isolated from H. coagulata. Our study, which to our knowledge is the first genomic analysis of an obligate symbiosis involving multiple partners, suggests striking complementarity in the biosynthetic capabilities of the two symbionts: B. cicadellinicola devotes a substantial portion of its genome to the biosynthesis of vitamins and cofactors required by animals and lacks most amino acid biosynthetic pathways, whereas S. muelleri apparently produces most or all of the essential amino acids needed by its host. This finding, along with other results of our genome analysis, suggests the existence of metabolic codependency among the two unrelated endosymbionts and their insect host. This dual symbiosis provides a model case for studying correlated genome evolution and genome reduction involving multiple organisms in an intimate, obligate mutualistic relationship. In addition, our analysis provides insight for the first time into the differences in symbionts between insects (e.g., aphids) that feed on phloem versus those like H. coagulata that feed on xylem. Finally, the genomes of these two symbionts provide potential targets for controlling plant pathogens such as Xylella fastidiosa, a major agroeconomic problem, for which H. coagulata and other sharpshooters serve as vectors of transmission

Blood-Feeding Induces Reversible Functional Changes in Flight Muscle Mitochondria of Aedes aegypti Mosquito

Background: Hematophagy poses a challenge to blood-feeding organisms since products of blood digestion can exert cellular deleterious effects. Mitochondria perform multiple roles in cell biology acting as the site of aerobic energytransducing pathways, and also an important source of reactive oxygen species (ROS), modulating redox metabolism. Therefore, regulation of mitochondrial function should be relevant for hematophagous arthropods. Here, we investigated the effects of blood-feeding on flight muscle (FM) mitochondria from the mosquito Aedes aegypti, a vector of dengue and yellow fever. Methodology/Principal Findings: Blood-feeding caused a reversible reduction in mitochondrial oxygen consumption, an event that was parallel to blood digestion. These changes were most intense at 24 h after blood meal (ABM), the peak of blood digestion, when oxygen consumption was inhibited by 68%. Cytochromes c and a+a3 levels and cytochrome c oxidase activity of the electron transport chain were all reduced at 24 h ABM. Ultrastructural and molecular analyses of FM revealed that mitochondria fuse upon blood meal, a condition related to reduced ROS generation. Consistently, BF induced a reversible decrease in mitochondrial H2O2 formation during blood digestion, reaching their lowest values at 24 h ABM where a reduction of 51% was observed. Conclusion: Blood-feeding triggers functional and structural changes in hematophagous insect mitochondria, which may represent an important adaptation to blood feedin