Estudio de la calidad del agua de bebida para aves en granjas avícolas de la región centro-oeste de la provincia de Entre Ríos. Granjas de postura comercial

En Argentina existe una población de 41.000.000 de gallinas en postura, de las cuales el 20% aproximadamente están localizadas en la Provincia de Entre Ríos, representando la segunda provincia en importancia del país en producción de huevos. El agua utilizada en las granjas es de origen subterráneo. Existe información sobre sus características por los múltiples usos a que se destina. Sin embargo, el nivel de conocimientos actual no nos sirve a la hora de tomar decisiones en particular. Por este motivo y con el fin de caracterizar el agua que se destina a bebida aviar, se realizó un relevamiento de granjas de postura en los departamentos Paraná y Diamante de la provincia de Entre Ríos, donde se encuentra la mayor concentración de aves destinadas a la producción de huevos. El mismo estuvo enmarcado en el proyecto de investigación “Estudio de la calidad del agua de bebida para aves en granjas avícolas de la región centro-oeste de la provincia de Entre Ríos”, llevado a cabo por las Cátedras de Química General y Avicultura FCA-UNER. Se analizó el agua de 29 granjas de postura, realizándose análisis físico-químico y bacteriológico, los resultados muestran pH dentro de lo recomendado, elevada dureza, altos valores de sodio y sulfatos así como importantes variaciones de los componentes aun en predios cercanos y como consecuencia la necesidad realizar correcciones de los aportes minerales a fin de lograr un balance electrolítico adecuado, para el mejor rendimiento de la explotación. &nbsp

Differential effects of phenobarbital, pentobarbital and diphenylhydantoin on motor cortical and reticular thresholds in the rhesus monkey

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46378/1/213_2004_Article_BF00404118.pd

Generation of 3D building models from 2D architectural plans

A robust, semi-automatic way is presented to create 3D polyhedral building models from computer-drawn floor plans, requiring minimal user interaction. The models ad here to a consistent solids representation and can be used for computer rendering, visualization in interactive walkthroughs, and in various simulation and analysisprograms. The output of our prototype program is directly compatible with the Berkeley WALKTHRU system and with the NIST CFAST fire simulator. A consistentmodel of a seven-storey building with more than 300 rooms has been generated in the time span of a few days from original AutoCAD floor plans drawn by architects

Moving Objects in Space: Exploiting Proprioception In Virtual-Environment Interaction

Manipulation in immersive virtual environments is difficult partly because users must do without the haptic contact with real objects they rely on in the real world to orient themselves and their manipulanda. To compensate for this lack, we propose exploiting the one real object every user has in a virtual environment, his body. We present a unified framework for virtual-environment interaction based on proprioception, a person's sense of the position and orientation of his body and limbs. We describe three forms of body-relative interaction: . Direct manipulation---ways to use body sense to help control manipulation . Physical mnemonics---ways to store/recall information relative to the body . Gestural actions---ways to use body-relative actions to issue commands Automatic scaling is a way to bring objects instantly within reach so that users can manipulate them using proprioceptive cues. Several novel virtual interaction techniques based upon automatic scaling and our proposed framew..

Protein profiling in F₁ and F₂ generations of two tomato genotypes differing in ripening time

Pericarp polypeptide profiles were analyzed at three ripening stages in the F1 hybrid and the F2 population from the cross between the accessions: LA1385 (Lycopersicon esculentum var. cerasiforme) and 804627 (L. esculentum, a homozygous genotype for the nor mutant). Six polymorphic polypeptides were observed in LA1385, while no polymorphic polypeptides among ripening stages was observed in 804627. On the other hand, some polypeptides in the F1 hybrid were not observed in the parents whereas others were present in both parental genotypes and were unnoticeable in the hybrid genotype. From a cluster analysis on the protein profiles of the F2 population, the differential expression of proteins allowed to distinguish mature green (MG) stage from the others two stages, while for breaker stage (BR) and red ripe stage, the genetic background was more important in forming groups. The differential expression of proteins could be associated with fruit morphology traits such as a 72 kDa polypeptide present in MG stage with fruit diameter, height and mass and a 47 kDa polypeptide found in BR with fruit shelf life.Fil: Rodríguez, Gustavo Rubén. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Sequin, L.. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Córdoba. Estación Experimental Agropecuaria Marcos Juárez; ArgentinaFil: Pratta, Guillermo Raúl. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Zorzoli, R.. Universidad Nacional de Rosario; ArgentinaFil: Picardi, Liliana Amelia. Universidad Nacional de Rosario; Argentin

Protein profiling in F1 and F2 generations of two tomato genotypes differing in ripening time

Pericarp polypeptide profiles were analyzed at three ripening stages in the F1 hybrid and the F2 population from the cross between the accessions: LA1385 (Lycopersicon esculentum var. cerasiforme) and 804627 (L. esculentum, a homozygous genotype for the nor mutant). Six polymorphic polypeptides were observed in LA1385, while no polymorphic polypeptides among ripening stages was observed in 804627. On the other hand, some polypeptides in the F1 hybrid were not observed in the parents whereas others were present in both parental genotypes and were unnoticeable in the hybrid genotype. From a cluster analysis on the protein profiles of the F2 population, the differential expression of proteins allowed to distinguish mature green (MG) stage from the others two stages, while for breaker stage (BR) and red ripe stage, the genetic background was more important in forming groups. The differential expression of proteins could be associated with fruit morphology traits such as a 72 kDa polypeptide present in MG stage with fruit diameter, height and mass and a 47 kDa polypeptide found in BR with fruit shelf life.Fil: Rodríguez, Gustavo Rubén. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Sequin, L.. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Córdoba. Estación Experimental Agropecuaria Marcos Juárez; ArgentinaFil: Pratta, Guillermo Raúl. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Zorzoli, R.. Universidad Nacional de Rosario; ArgentinaFil: Picardi, Liliana Amelia. Universidad Nacional de Rosario; Argentin

Recurrence of Stachybotrys chartarum during mycological and toxicological study of bioaerosols collected in a dairy cattle shed

Agricultural occupations associated with animal breeding and the processing of animal materials in confinement systems could potentially lead to bioaerosol exposures. Moulds and mycotoxins could be constituents of bioaerosols and should be studied because of their possible involvement in respiratory diseases and cancers. In order to characterize the fungal contamination of the indoor air in a dairy barn, bioaerosols were collected during 20 days in a cattle farm located in Normandy (France). Mycobiota, mycotoxins and the mutagenicity of bioaerosols were studied. The toxigenic ability of Aspergillus flavus group and Aspergillus fumigatus isolates was also evaluated in vitro. The prevalent airborne moulds were from the following potentially toxigenic species: Aspergillus flavus group, Aspergillus fumigatus, Penicillium chrysogenum, Stachybotrys chartarum, and the allergenic species Ulocladium chartarum, Cladosporium cladosporioides. In comparison with harvesting, grain handling or broiler breeding, the concentrations of viable moulds were lower in the cattle shed. Seasonal variations in levels of several species were also observed. This study revealed that aflatoxins were detected in bioaerosols and, for the first time, showed that farmers are possibly exposed to Stachybotrys chartarum during routine barn work. Moreover, the finding of mutagenicity from bioaerosols needs further investigations on bioaerosol composition