3,678 research outputs found

    Liderazgo y autoeficacia en el comportamiento organizacional positivo

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    El objetivo que tiene este proyecto es revisar los conceptos básicos acerca de las relaciones que crean los líderes con sus colaboradores dentro de las organizaciones, dichas relaciones y vínculos pueden afectar positiva o negativamente el desempeño de sus actividades diarias dentro de una organización. Para darle inicio a la investigación se estudió como primer paso el concepto de liderazgo transformacional, capital psicológico y que componentes hacían parte de este factor. El desarrollo de la investigación se enfatizó entre el liderazgo transformacional y la autoeficacia ya que son factores claves dentro del desarrollo de las actividades organizacionales debido a que afectan claramente el capital humano de las compañías y están directamente relacionados con el crecimiento de las mismas, lo que nos llevó a preguntarnos ¿qué relación tendrá el liderazgo transformacional y la autoeficacia en la productividad de las empresas? Es aquí donde radica la importancia de esta investigación ya que el cambio de pensamiento de las organizaciones hacia un liderazgo transformacional podría lograr una maximización del desempeño del personal de trabajo en relación al objetivo de la compañía. Como conclusión llegamos a que efectivamente hay un efecto positivo en los individuos que desarrollan un capital psicológico específicamente en el factor de autoeficacia para lograr un desempeño destacable, productivo y eficiente dentro de las organizaciones.The goal of this project is review the basics about creating relationships with partners’ leaders within organizations, such relationships and links can positively or negatively affect the performance of their daily activities within an organization. We began our research studying the concept of transformational leadership, psychological capital and which components were part of this factor. The development of our investigation was emphasized between transformational leadership and self-efficacy as they are key factors in the development of organizational activities because they clearly affect the human capital of companies and are directly related to the growth of the same, which He led us to wonder what relationship will transformational leadership and self-efficacy in productivity of businesses? It is here where the importance of this research since the change of thinking of organizations towards transformational leadership could achieve maximizing staff performance work in relation to the objective of the company. Upon reaching conclusion that there is indeed a positive effect on equity specifically individuals develop a psychological factor in achieving a remarkable self-efficacy, productive and efficient performance within organizations

    Quality of Life is Essential: Implications for Diagnosis and Treatment for BRCA1/2 Germline Mutations

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    BRCA1 and BRCA2 germline pathogenic variants are a matter of concern because of their relevance in cancer risk assessment, personalized treatment options, and cancer prevention. Therefore, the study of quality of life (QoL), although complex, has been a challenge for clinical care and research implications for patients and families with hereditary breast and ovarian cancer (HBOC). This chapter aims to show the evolution of the evaluation of the QoL study according to the current needs of patients with BRCA1/BRCA2 mutations

    Coping with environmental eukaryotes; identification of pseudomonas syringae genes during the interaction with alternative hosts or predators

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    Understanding the molecular mechanisms underpinning the ecological success of plant pathogens is critical to develop strategies for controlling diseases and protecting crops. Recent observations have shown that plant pathogenic bacteria, particularly Pseudomonas, exist in a range of natural environments away from their natural plant host e.g., water courses, soil, non-host plants. This exposes them to a variety of eukaryotic predators such as nematodes, insects and amoebae present in the environment. Nematodes and amoeba in particular are bacterial predators while insect herbivores may act as indirect predators, ingesting bacteria on plant tissue. We therefore postulated that bacteria are probably under selective pressure to avoid or survive predation and have therefore developed appropriate coping mechanisms. We tested the hypothesis that plant pathogenic Pseudomonas syringae are able to cope with predation pressure and found that three pathovars show weak, but significant resistance or toxicity. To identify the gene systems that contribute to resistance or toxicity we applied a heterologous screening technique, called Rapid Virulence Annotation (RVA), for anti-predation and toxicity mechanisms. Three cosmid libraries for P. syringae pv. aesculi, pv. tomato and pv. phaseolicola, of approximately 2000 cosmids each, were screened in the susceptible/non-toxic bacterium Escherichia coli against nematode, amoebae and an insect. A number of potential conserved and unique genes were identified which included genes encoding haemolysins, biofilm formation, motility and adhesion. These data provide the first multi-pathovar comparative insight to how plant pathogens cope with different predation pressures and infection of an insect gut and provide a foundation for further study into the function of selected genes and their role in ecological success

    Nephrotic syndrome secondary to membranoproliferative glomerulonephritis due to Sjögren’s syndrome

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    El síndrome de Sjögren (SS), enfermedad autoinmune crónica, primaria o secundaria a otros desórdenes inmunológicos. La prevalencia es 0.05-0.23%, relación hombre: mujer 1:9, grupo etáreo 52-72 años. La afectación renal en el SSP (primario) puede ocasionar compromiso glomerular y/o tubular. Reportamos el caso de un hombre de 56 años, previamente sano que presentó síndrome nefrótico en el contexto de una glomerulonefritis membranoproliferativa (GMNMP), se diagnosticó SS con compromiso glomerular y se realizó revisión de la literatura.Presentación de casos136-139Sjögren’s syndrome (SS) is a chronic autoimmune disease primary or secondary to other immunological disorders. The prevalence is 0.05-0.23%, male:female ratio 1:9, age group 52-72 years. Renal involvement in primary SS can lead to glomerular and/or tubular involvement. The case of a 56-year-old man previously healthy that presented nephrotic syndrome in the context of a membranoproliferative glomerulonephritis (MPGN) and was diagnosed with SS with glomerular involvement is reported, and a literature review was performed

    Delirium en pacientes con trauma craneoencefálico del Hospital Universitario San Jorge, EPS

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    El trauma craneoencefálico (TEC) es cualquier alteración física o deterioro funcional del contenido craneal, secundario a un cambio brusco de energía mecánica, siendo una de sus complicaciones más frecuentes el Delirium, un síndrome neuropsiquiátrico cuyos síntomas esenciales incluyen deterioro cognitivo, alteración de la atención, el afecto y el comportamiento, que aparece súbitamente y tiene un curso fluctuante. Este estudio descriptivo incluyó 28 pacientes ingresados al Hospital San Jorge con diagnóstico de TEC durante los meses de marzo y abril de 2007, evaluados con escalas para detectar delirium. Se encontró que el 46% presentó Delirium en algún momento de su estadía hospitalaria, siendo mayor la incidencia en quienes presentaron TEC moderado y durante los primeros días de su hospitalización

    Photorhabdus adhesion modification protein (Pam) binds extracellular polysaccharide and alters bacterial attachment

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    Background Photorhabdus are Gram-negative nematode-symbiotic and insect-pathogenic bacteria. The species Photorhabdus asymbiotica is able to infect humans as well as insects. We investigated the secreted proteome of a clinical isolate of P. asymbiotica at different temperatures in order to identify proteins relevant to the infection of the two different hosts. Results A comparison of the proteins secreted by a clinical isolate of P. asymbiotica at simulated insect (28°C) and human (37°C) temperatures led to the identification of a small and highly abundant protein, designated Pam, that is only secreted at the lower temperature. The pam gene is present in all Photorhabdus strains tested and shows a high level of conservation across the whole genus, suggesting it is both ancestral to the genus and probably important to the biology of the bacterium. The Pam protein shows limited sequence similarity to the 13.6 kDa component of a binary toxin of Bacillus thuringiensis. Nevertheless, injection or feeding of heterologously produced Pam showed no insecticidal activity to either Galleria mellonella or Manduca sexta larvae. In bacterial colonies, Pam is associated with an extracellular polysaccharide (EPS)-like matrix, and modifies the ability of wild-type cells to attach to an artificial surface. Interestingly, Surface Plasmon Resonance (SPR) binding studies revealed that the Pam protein itself has adhesive properties. Although Pam is produced throughout insect infection, genetic knockout does not affect either insect virulence or the ability of P. luminescens to form a symbiotic association with its host nematode, Heterorhabditis bacteriophora. Conclusions We studied a highly abundant protein, Pam, which is secreted in a temperature-dependent manner in P. asymbiotica. Our findings indicate that Pam plays an important role in enhancing surface attachment in insect blood. Its association with exopolysaccharide suggests it may exert its effect through mediation of EPS properties. Despite its abundance and conservation in the genus, we find no evidence for a role of Pam in either virulence or symbiosis

    Delirium en pacientes con trauma craneoencefálico del Hospital Universitario San Jorge, EPS

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    El trauma craneoencefálico (TEC) es cualquier alteración física o deterioro funcional del contenido craneal, secundario a un cambio brusco de energía mecánica, siendo una de sus complicaciones más frecuentes el Delirium, un síndrome neuropsiquiátrico cuyos síntomas esenciales incluyen deterioro cognitivo, alteración de la atención, el afecto y el comportamiento, que aparece súbitamente y tiene un curso fluctuante. Este estudio descriptivo incluyó 28 pacientes ingresados al Hospital San Jorge con diagnóstico de TEC durante los meses de marzo y abril de 2007, evaluados con escalas para detectar delirium. Se encontró que el 46% presentó Delirium en algún momento de su estadía hospitalaria, siendo mayor la incidencia en quienes presentaron TEC moderado y durante los primeros días de su hospitalización

    Mutation of praR in Rhizobium leguminosarum enhances root biofilms, improving nodulation competitiveness by increased expression of attachment proteins

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    Summary In Rhizobium leguminosarum bv. viciae, quorumsensing is regulated by CinR, which induces the cinIS operon. CinI synthesizes an AHL, whereas CinS inactivates PraR, a repressor. Mutation of praR enhanced biofilms in vitro. We developed a light (lux)-dependent assay of rhizobial attachment to roots and demonstrated that mutation of praR increased biofilms on pea roots. The praR mutant out-competed wild-type for infection of pea nodules in mixed inoculations. Analysis of gene expression by microarrays and promoter fusions revealed that PraR represses its own transcription and mutation of praR increased expression of several genes including those encoding secreted proteins (the adhesins RapA2, RapB and RapC, two cadherins and the glycanase PlyB), the polysaccharide regulator RosR, and another protein similar to PraR. PraR bound to the promoters of several of these genes indicating direct repression. Mutations in rapA2, rapB, rapC, plyB, the cadherins or rosR did not affect the enhanced root attachment or nodule competitiveness of the praR mutant. However combinations of mutations in rapA, rapB and rapC abolished the enhanced attachment and nodule competitiveness. We conclude that relief of PraR-mediated repression determines a lifestyle switch allowing the expression of genes that are important for biofilm formation on roots and the subsequent initiation of infection of legume roots
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