Preneoplasias cutáneas y de mucosa oral

Este trabajo hace foco sobre aquellas dermatosis que pueden dar origen a tumores. Enfatiza el reconocimiento de las mismas a partir del examen clínico y de los métodos de laboratorio que aseveran ese diagnóstico. Presenta iconografía relativa sobre algunos temas y todos son avalados por una extensa bibliografía, indicada en los 49 capítulos de las cinco secciones que consta el documento

Influence of thickness on properties of plasticized oat starch films.

The aim of this study was to investigate the effect of thickness (between 80 and 120 µm) on apparent opacity, water vapor permeability and mechanical properties (tensile and puncture) of oat starch films plasticized with glycerol, sorbitol, glycerol:sorbitol mixture, urea and sucrose. Films were stored under 11, 57, 76 and 90% relative humidity (RH) to study the mechanical properties. It was observed that the higher the thickness, the higher was the opacity values. Films without the plasticizer were more opaque in comparison with the plasticized ones. Glycerol:sorbitol films presented increased elongation with increasing thickness at all RH. Puncture force showed a strong dependence on the film thickness, except for the films plasticized with sucrose. In general, thickness did not affect the water permeability

First report of Papaya ringspot virus infecting Carica papaya in Argentina

Papaya plants (Carica papaya L.) with severe leaf mosaic and deformation symptoms were observed and collected in the Formosa, Corrientes and Misiones provinces of northern Argentina. These symptoms were similar to those induced by Papaya ringspot virus (PRSV-P) (Tripathi et al., 2008). Electron microscopy observations of leaf dip preparations from symptomatic papaya leaves revealed typical flexuous potyvirus particles of ca. 800×12 nm (Francki et al., 1985). Papaya leaf extracts from affected plants were mechanically inoculated on healthy papaya plants, which showed typical symptoms of the disease. The presence of the virus in symptomatic plants was tested and confirmed by double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA), using a specific PRSV antiserum (Agdia, Elkhart, IN). Total RNA was extracted using RNeasy Plant Mini Kit (Qiagen, Hilden, Germany) and tested by reverse transcription-polymerase chain reaction (RT-PCR) with specific PRSV coat protein gene primers: BoCP_Fwd 5’-TCCAAGAATGAAGCTGTGGACGCTGGTT-3’ and BoCP_Rev 5’-TYAGTTGCGCATACCCAGGAGAGAGT-3’. The RT-PCR amplicons of the expected size were purified and directly sequenced in both directions at Macrogen Inc. (Seoul, Korea). BLASTn analysis of the sequenced fragments (828 bp) (GenBank accession Nos. KX385113 to KX385116) showed 97 to 98% nucleotide sequence identity with previously reported PRSV-P isolates from Brazil (AF344642, JQ755427, JQ755424). To the best of our knowledge, this is the first report of the occurrence of PRSV in papaya plants in Argentina. Due to the devastating effects of PRSV in papaya (Tripathi et al., 2008) and the recent increase of cultivation area in northern Argentina, it becomes necessary to implement management strategies to control this disease and avoid the introduction of the virus into new production areas.Instituto de Patología VegetalFil: Cabrera Mederos, Dariel. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Cabrera Mederos, Dariel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; ArgentinaFil: Dal Zotto, Angelica. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; ArgentinaFil: Galdeano, Ernestina. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; ArgentinaFil: Galdeano, Ernestina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica del Nordeste; ArgentinaFil: Portal, O. Universidad Central “Marta Abreu” de Las Villas. Facultad de Ciencias Agropecuarias; CubaFil: Giolitti, Fabian. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentin

From strike-slip to reverse reactivation : the Crevillente Fault System and seismicity in the Bullas-Mula area (Betic Cordillera, SE Spain)

Several major N80ºE faults occur in the Bullas-Mula area (SE Spain). These faults and the numerous thrust slices of the Sierra de Ricote can be related to the movements of the Crevillente (or Cadiz-Alicante) fault system, which causes the westward displacement of the Betic Internal Zone and part of the External Zone. These faults moved with dextral strike-slip from Late Burdigalian to Early Tortonian. From this time on, the s1 position changed from a WNW-ESE direction to approximately N-S, giving rise to movements with a new reverse character. The focal mechanisms of the 1999 Mula earthquakes indicate a N80ºE nodal plane, and their pressure axes also coincide with the s1 direction existing from the Late Miocene and deduced from mesotectonic analysis at many points of the region. There is also good coincidence between their epicentral position and the fault traces. The Bullas earthquakes that occurred in 2002 are not directly related to the Crevillente faults, although their stress-pressure axes coincide with the s1 direction reported there

Arbolado de espacios verdes de la Ciudad de Corrientes: Relevamiento de plagas y enfermedades, asesoramiento y capacitación

El arbolado urbano presta importantes servicios socio- ambientales y forma parte del patrimonio cultural e histórico. El estrés a que están sometidos los árboles urbanos los predispone al ataque de diversas plagas y enfermedades. En la ciudad de Corrientes (Argentina) se desarrolló un proyecto de extensión destinado a analizar la situación sanitaria de los árboles de espacios verdes de la ciudad y colaborar en la capacitación del personal municipal afectado a su atención. Se analizaron un total de 779 árboles pertenecientes a 67 especies y los porcentajes de árboles afectados variaron entre el 27,59% y el 20,91%. Los principales agentes perjudiciales resultaron los hongos de la madera, hormigas, termitas y pulgones. Se elaboraron e implementaron de medidas de manejo y prevención en aquellos árboles con mayores daños. Se realizó un curso- taller teórico-práctico destinado a funcionarios y agentes municipales del área, referido a la importancia ambiental del arbolado urbano, la identificación de los principales causantes de daños en Corrientes y sus posibles medidas de manejo