Fine Atmospheric Analysis of the Star Theta Ursae Majoris

Higher Educatio

Variación estacional de la gastroenteritis verminosa y presentación de brotes clínicos, diagnosticados en caprinos en la provincia de Formosa, Argentina

Resumen Se describen brotes de presentación clínica de gastroenteritis verminosa (GEV) en caprinos de la Provincia de Formosa (Argentina), en todas las estaciones del año, recopilando los resultados obtenidos durante un período de 5 años, en una población de 2320 caprinos de 146 hatos. En el lustro fueron diagnosticados 72 brotes clínicos de la enfermedad confirmados por análisis coproparasitológicos(hpg), mientras se determinaron los géneros por coprocultivo. En el clima subtropical la enfermedad se presentó durante las 4 estaciones del año, pero los brotes tuvieron mayor prevalencia en otoño-invierno y en menor escala en primavera-verano. Los géneros de mayor prevalencia fueron Haemonchussp.; Trichostrongylussp.; Strongyloidessp.; Oesophagostomumsp.; Trichurissp., y Bunostomumsp. Hubo una relación directa de la presentación de la GEV con el aumento de la humedad ambiental proporcionada por lluvias en los 90 días anteriores a la aparición del brote. En cuanto a la relación del cuadro sintomático con los hpg, se observó en el 87.5% de los brotes que los recuentos de huevos por gramo fueron iguales o superiores a 1000, mientras que en el restante 12.5% los conteos fueron inferiores a este número, pero superando 700 hpg. No obstante estas variaciones, el hallazgo del cuadro sintomático fue similar y en los dos grupos hubo mortandad de animales. De la información obtenida de las encuestas efectuadas a los productores se desprende que el 82.4% desparasitan, de los cuales el 11.7 % efectúa un único tratamiento al año, el 39.5% dos, el 7.8% tres y el 11.7% cuatro tratamientos anuales. El restante 11.7% manifestaron desparasitar cuando observaban muertes, enflaquecimiento, diarreas o mal estado general de los animales. El 17.6% de los productores declararon no realizar ningún tratamiento. Con referencia a los criterios utilizados para decidir realizar él o los tratamientos antiparasitarios, la mayoría de los productores declararon proceder con él o los tratamientos cuando la enfermedad estaba en plena evolución clínica y aparecían casos de mortandad. Solo el 7% utiliza el servicio de diagnóstico coproparasitológico. Surgió de la encuesta que el 63% de los productores tratan la manifestación clínica de parasitosis en sus hatos con ivermectina, el 15.6% opta porbencimidazoles e ivermectina de manera alternada y el 7.8% administra solamente bencimidazoles. El 100% de los productores no realiza un control coproparasitológico postratamiento. Para optimizar el control de las parasitosis gastrointestinales en los hatos caprinos, en las condiciones de cría de Formosa, surge como muy necesario implementar un programa de extensión destinado a ofrecer y difundir mayores conocimientos a los productores de caprinos tendiente a lograr mayor productividad, mediante el desarrollo de un programa de control voluntario y eficiente de la enfermedad.Outbreaks of parasitic gastrointestinal enteritis are described in a population of 2320 goats from 146 caprine flocks, in the subtropical climate Province of Formosa, in the northeast of Argentina, during the four seasons of the year, summarizing the results obtained over a 5 year period. A total of 72 outbreaks were clinically diagnosed, and confirmed byf aecal examination (epg) and faecal cultures for the classification of parasite genera. Although the disease was present all 4 seasons of the year, the highest prevalence was in autumn-winter and to a lesser degree in spring-summer. The most prevalent genera wereHaemonchus sp.; Strongyloides sp.; Oesophagostomum sp.; Trichuris sp. and Bunostomum sp. A direct relation exists between the outbreaks and the increase of environmenta lhumidity from rainfalls, during the previous 90 days. With reference to clinical symptoms and epg counts, in 87,5% of the outbreaks epg counts were equale or higher than 1000, whilstin 12.5% failed to reach 1000 but were higher tan 700 epg; however symptomology in both groups were similar and mortality a constant feature. From the survey made with the caprine breeders who participated in the study, 82.4% treated their flocks, of which 11.7% treated once in the year, 39.5% twice, 7.8% three times and 11.7% gave a total of 4 treatments. The report indicated that 11.7% give treatment only when mortality, loss of condition and weight were apparent. A total of 17.6% of the surveyed owners do not submit their animals to any treatment. With reference to the criteria used to decide onthe momento to dose, it was clear that the mayority depended on the manifest clinical symptoms and deaths. Only 7% depended on a prior parasitological diagnosis. As to drug preference, 63% used ivermectin, 15.6% administered ivermectin and bencimidazoles alternatively and 7.8% only bencimidazoles. No owner used thea bailable post-treatment faecal analysis for control. To optimize the control of gastrointestinal parasites it is necessary to establish a Project whereby caprine breeders receive more and better knowledge, increase productivity and make any treatment programme a successFil: Mancebo, Orlando Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Formosa. Provincia de Formosa. Centro de Investigaciones y Transferencia de Formosa. Universidad Nacional de Formosa. Centro de Investigaciones y Transferencia de Formosa; ArgentinaFil: Giménez, Juana Noemí. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Formosa. Provincia de Formosa. Centro de Investigaciones y Transferencia de Formosa. Universidad Nacional de Formosa. Centro de Investigaciones y Transferencia de Formosa; ArgentinaFil: Russo, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Formosa. Provincia de Formosa. Centro de Investigaciones y Transferencia de Formosa. Universidad Nacional de Formosa. Centro de Investigaciones y Transferencia de Formosa; ArgentinaFil: Monzon, Carlos Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Formosa. Provincia de Formosa. Centro de Investigaciones y Transferencia de Formosa. Universidad Nacional de Formosa. Centro de Investigaciones y Transferencia de Formosa; ArgentinaFil: Bulman, G. Mauricio. No especifica

Effects of Cryogenic Processing on Rapid Prototyping Materials (DSMSomos-8110 and DuraForm PA)

This research investigates the effects of cryogenic processing on the properties of rapid prototyped materials. Not much research has been done on the post-processing (aging) of rapid prototyped (RP) polymers at temperatures below 159K (–173˚F). Test specimens of RP thermoplastic resin DSM-Somos 8110 and DuraformPA Nylon were fabricated and cryogenically aged from 5-30 hours. The tensile strength and impact toughness were measured. The goal of this work was to study the effect of cryogenic aging on yield strength and ductility. This research investigated (1) the cryogenic aging of DSM-Somos 8110 and DuraformPA Nylon, (2) the effects of controlled ramp-downs/ups on the ultimate and tensile strengths of samples, (3) the experimental methods, and (4) the analysis and interpretation of the data.Part of this work was funded by a NSF Grant under Research Experiences for Undergraduates.Mechanical Engineerin

Impact ionization in GaAs: a screened exchange density functional approach

Results are presented of a fully ab-initio calculation of impact ionization rates in GaAs within the density functional theory framework, using a screened-exchange formalism and the highly precise all-electron full-potential linearized augmented plane wave (FLAPW) method. The calculated impact ionization rates show a marked orientation dependence in {\bf k} space, indicating the strong restrictions imposed by the conservation of energy and momentum. This anisotropy diminishes as the impacting electron energy increases. A Keldysh type fit performed on the energy-dependent rate shows a rather soft edge and a threshold energy greater than the direct band gap. The consistency with available Monte Carlo and empirical pseudopotential calculations shows the reliability of our approach and paves the way to ab-initio calculations of pair production rates in new and more complex materials.Comment: 11 pages, 4 figures, Submitted to Phys. Rev.

A theory on reports of constructive (real) and illusory posttraumatic growth

It has been suggested that self-reported posttraumatic growth could sometimes be considered as a way for people to protect themselves from the distress of trauma. In this case, reports of posttraumatic growth could be illusory. We suggest a theory on self-reported constructive (real) posttraumatic growth and illusory posttraumatic growth by using Rogers’s (1959) theory and the work by Vaillant (1995). Through this theoretical framework we attempt to explain when reports of posttraumatic growth are likely to be constructive and real and when such reports are likely to represent aspects of illusions. We will also consider the implications for research practice

Automatic structures for semigroup constructions

We survey results concerning automatic structures for semigroup constructions, providing references and describing the corresponding automatic structures. The constructions we consider are: free products, direct products, Rees matrix semigroups, Bruck-Reilly extensions and wreath products.Comment: 22 page

Things change: Women’s and men’s marital disruption dynamics in Italy during a time of social transformations, 1970-2003

We study women’s and men’s marital disruption in Italy between 1970 and 2003. By applying an event-history analysis to the 2003 Italian variant of the Generations and Gender Survey we found that the spread of marital disruption started among middle-highly educated women. Then in recent years it appears that less educated women have also been able to dissolve their unhappy unions. Overall we can see the beginning of a reversed educational gradient from positive to negative. In contrast the trend in men’s marital disruption risk appears as a change over time common to all educational groups, although with persisting educational differentials.determinants, educational differences, event history analysis, gender difference, Italy, marital disruption

Asymmetric Oxidation of Enol Derivatives to α-Alkoxy Carbonyls Using Iminium Salt Catalysts: A Synthetic and Computational Study

We report herein the first examples of asymmetric oxidation of enol ether and ester substrates using iminium salt organocatalysis, affording moderate to excellent enantioselectivities of up to 98% ee for tetralone-derived substrates in the α-hydroxyketone products. A comprehensive density functional theory study was undertaken to interpret the competing diastereoisomeric transition states in this example in order to identify the origins of enantioselectivity. The calculations, performed at the B3LYP/6-31G(D) level of theory, gave good agreement with the experimental results, in terms of the magnitude of the effects under the specified reaction conditions, and in terms of the preferential formation of the (R)-enantiomer. Just one of the 30 characterized transition states dominates the enantioselectivity, which is attributed to the adoption of an orientation relative to stereochemical features of the chiral controlling element that combines a CH interaction between a CH 2 group in the substrate and one of the aromatic rings of the biaryl section of the chiral auxiliary with a good alignment of the acetoxy group with the other biaryl ring, and places the smallest substituent on the alkene (a hydrogen atom) in the most sterically hindered position