La Organización Mundial de la Salud define PEComa como "un tumor mesenquimal compuesto por células epitelioides perivasculares histológicamente e inmunohistoquímicamente distintivas". Esta familia de tumores incluye a: angiomiolipoma (AML), tumor de pulmón de células claras, linfangioleiomiomatosis y tumores muy raros en otros lugares. Los AML se clasificaron previamente como hamartomas; sin embargo, ahora se considera que los AML pertenecen a la familia de los PEComa. Se localizan principalmente en el riñón y son poco frecuentes las localizaciones extra-renales, raramente la ubicación es retroperitoneal. Presentamos el caso clínico de un varón de 30 años, en quien se halló a través de estudios por imágenes una masa retroperitoneal intercavo- aórtica de 7 cm aproximadamente, que se resecó quirúrgicamente y el estudio anatomopatológico confirmó el diagnóstico de PEComa sub-tipo AML.
Penicillium rubens strain 212 (PO212) acts as an inducer of systemic resistance in tomato plants. The effect of crude extracellular extracts of PO212 on the soil-borne pathogen Fusarium oxysporum f. sp. lycopersici has been evaluated. Evidence of the involvement of soluble, thermo-labile, and proteinase-inactivated macromolecules present in PO212 crude extracts in the control of Fusarium vascular disease in tomato plants was found. Proteomic techniques and the availability of the access to the PO212 genome database have allowed the identification of glycosyl hydrolases, oxidases, and peptidases in these extracellular extracts. Furthermore, a bioassay-guided fractionation of PO212 crude extracellular extracts using an integrated membrane/solid phase extraction process was set up. This method enabled the separation of a PO212 crude extracellular extract of seven days of growth into four fractions of different molecular sizes and polarities: high molecular mass protein fraction >5 kDa, middle molecular mass protein fraction 5–1 kDa, low molecular mass metabolite fraction, and nutrients from culture medium (mainly glucose and minerals). The high and middle molecular mass protein fractions retained disease control activity in a way similar to that of the control extracts. Proteomic techniques have allowed the identification of nine putatively secreted proteins in the high molecular mass protein fraction matching those identified in the total crude extracts. Therefore, these enzymes are considered to be potentially responsible of the crude extracellular extract-induced resistance in tomato plants against F. oxysporum f. sp. lycopersici. Further studies are required to establish which of the identified proteins participate in the PO212’s action mode as a biocontrol agent.
ResumenLa comprensión de lo que se lee en contextos universitarios depende en gran medida de la realización de inferencias y del tipo discursivo de los textos. Así, en este estudio buscamos describir el desempeño de los estudiantes del primer año de Psicología en la realización de inferencias al leer textos predominantemente expositivos y argumentativos. Encontramos, que al leer textos de ambas clases discursivas, mientras que algunos estudiantes reconocían elementos para contextuar, realizaban inferencias conectivas y elaborativas, otros, optaron por no responder. El hecho de que hayan logrado realizar inferencias en el caso de ambos tipos discursivos, indicaría que fueron capaces de construir coherencia a nivel local y global. Sin embargo, el alto porcentaje de ausencia de respuestas, podría indicar ciertas dificultades en todos los aspectos antes mencionados. Palabras clave: lectura; psicología; primer año; tipos discursivos; inferencias.
AbstractReading comprehension in university contexts depends on making inferences and on the text´s discursive type. So, in this study we seek to describe Psychology first year student´s performance in making inferences when reading predominantly expository and argumentative text´s. We´ve found that when reading texts of both discursive types, while some students recognized elements to contextualize, made connective and elaborative inferences, others chose not to respond. The fact that they´ve been able to make inferences in the case of both discursive types, would indicate that they were able to build coherence locally and globally. However, the high percentage of absence of answers could indicate certain difficulties in all the aforementioned aspects.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.