Resumen En este trabajo se presentan los resultados del estudio tecno-morfológico, funcional y decorativo realizado sobre el registro cerámico del sitio arqueológico Las Tejas (LT), recuperado durante las tareas de campo llevadas a cabo en 1995 y 2012. Este yacimiento fue descubierto por A. Serrano a comienzos del siglo XX y es considerado uno de los primeros sitios insulares localizados en el tramo medio del río Paraná (Coronda, Santa Fe). Su emplazamiento en el interior de la llanura aluvial, con dinámicas fluviales propias de este tipo de ambientes, otorga características específicas al registro arqueológico y a sus condiciones de preservación. En el caso de la alfarería, muestra una serie de rasgos similares a la de contextos arqueológicos Goya-Malabrigo, que refieren a formas simples -abiertas y cerradas- mayormente lisas, con incisiones de surco rítmico en algunos casos, presencia de asas, apéndices zoomorfos y alfarería gruesa. Se presenta la información obtenida con el objetivo de contribuir a las discusiones en torno a la tecnología cerámica de las poblaciones que habitaron la región del Paraná medio.

Abstract This paper presents the results of the techno-morphological, functional and decorative study carried out on the pottery record recovered in Las Tejas (LT) archaeological site during the fieldworks carried out in 1995 and 2012. This site was discovered by A Serrano at the beginning of the XX century and it is considered one of the first island archaeological sites located in the middle section of the Paraná River (Coronda, Santa Fe). The location inside the alluvial plain, with fluvial dynamics typical of these environments, gives specific characteristics to the archaeological record and its conservation conditions. Specifically, pottery show several characteristics similar to those of Goya-Malabrigo archaeological contexts, which refers to simple shapes -open and closed- mostly smooth, with rhythmic groove incisions in some cases, presence of handles, zoomorphic appendages and thick pottery. The information obtained is presented with the aim of contributing to the discussions of Middle Paraná region pottery technology.

RESUMO: O cultivo de milho RR® precedendo a soja, principalmente no sistema de semeadura direta, favorece a maior ocorrência de plantas voluntárias de milho RR®, interferindo em lavouras de soja. Plantas voluntárias de milho são originadas a partir de sementes perdidas na colheita ou não colhidas do campo, sendo estas, sementes individuais, que originam plantas individuais, ou várias sementes aderidas a segmentos da ráquis, que dão origem às touceiras. Milho voluntário na forma de touceiras predomina em lavouras de soja, porém poucas informações sobre seu efeito sobre a soja estão disponíveis na literatura. Durante dois anos foram realizados três experimentos em campo com o objetivo de avaliar o efeito das interferências de populações de milho voluntário RR® F2 oriundas de sementes individuais e de touceiras (sete plantas de milho emergidas no mesmo ponto) sobre os componentes do rendimento e o rendimento de grãos da soja. Os resultados demonstram que as perdas nos componentes do rendimento e no rendimento de grãos da soja são influenciadas pela população e origem do milho voluntário. Touceiras de milho causaram perdas superiores a 90% para populações acima de quatro touceiras m-2, enquanto a perda máxima média observada para plantas individuais foi de 83% nas maiores populações estudadas. O rendimento de grãos da soja reduziu de forma expressiva quando em competição com populações inferiores a uma planta ou touceira m-2, sendo de 16% e 46% na população de 0,5 planta individual e touceira m-2, respectivamente.

ABSTRACT: The cultivation of GR® maize prior to soybean, mainly in the no-tillage system favors the higher occurrence of GR® volunteer corn interfering in soybean crops. Volunteer corn originate from seeds that were lost during harvest or from non-harvested seeds from the field; these are individual seeds, originating individual plants, or several seeds adhered to segments of the rachis, which originate clumps. Volunteer corn in the form of clumps predominates in soybean crops, but little information about its effect on soybean is available in the literature. During two years, three experiments were carried out with the objective of evaluate the impact of the interference of GR® F2 generation volunteer corn populations coming from individual and clump seeds (seven corn plants emerged at the same point) over soybean yield components and grain yield. The results show that losses in soybean yield components and grain yield are influenced by the population and origin of volunteer corn. Clumps cause losses over 90% for populations above four clumps m-2, while the mean maximum loss observed for individual plants was 83% in the largest studied populations. Soybean yield decreased significantly when competing with populations below one plant or clump m-2, being 16% and 46% in the population of 0.5 individual plant and clump m-2, respectively.

ABSTRACT Objectives: to determine the frequency, clinical features, complications and factors associated with mortality of patients on mechanical ventilation. Materials and Methods: retrospective, descriptive with an analytical component of patients admitted to the Adult Intensive Care Unit of the Clinical Hospital, between January 2001 and May 2002. Clinical records were used and analyzed using Epi Info version 3.5.1., significant p <0.05. Results: Of 715 patients admitted, we evaluated 511 that required mechanical ventilation (71.5%). Most common indications for mechanical ventilation: postoperative 43.2% (n = 211), lung disease 23% (n = 117), neurological 7.4% (n = 38). Average duration of mechanical ventilation: 7.7 ± 9 days. Tracheostomy was performed in 7.6% (n = 39) of patients, more frequently indicated for prolonged intubation 40.6% (n = 13), on average on day 17; of these 87.1% (n = 34) were discharged with tracheostomy. Extubation failure: 10.4% (n = 53) and the most common causes were: poor secretions management and poor respiratory mechanics 17% (n = 9). Overall mortality was 52.6% (n = 269). Most common complications: pneumonia 31.7% (n = 53), mechanical complications related to the endotracheal tube 16.2% (n = 27), atelectasis 12% (n = 20), self-extubation 9% (n = 15), tracheostomy complications 7.8% (n = 13). Overall mortality in patients with complications related to mechanical ventilation was 49.7% (n = 83) and mortality attributable to complications of mechanical ventilation was 34.9% (n = 29). The complication most frequently associated with death was pneumonia (p = 0.03). Conclusion: use of mechanical ventilation is common, with significant associated complications, of which pneumonia is the main one and with the worst prognosis. Keywords: mechanical ventilation, complications, pneumonia.

RESUMEN Objetivos: Determinar la frecuencia, características clínicas, complicaciones y factores asociados a mortalidad de pacientes en Asistencia Respiratoria Mecánica. Materiales y Método: estudio observacional, descriptivo, con componente analítico, de pacientes internados en la Unidad de Cuidados Intensivos de Adultos del Hospital de Clínicas, entre enero del 2001 y mayo del 2002. Fueron utilizados los registros clínicos y analizados con el programa Epi-Info versión 3.5.1., p significativa <0,05. Resultados: De 715 pacientes ingresados, fueron evaluados 511 que requirieron asistencia respiratoria mecánica (71,5%). Indicaciones más frecuentes de asistencia respiratoria mecánica: post operatorio 43,2% (n: 211), enfermedad pulmonar 23% (n: 117), neurológica 7,4% (n: 38). Duración media de la asistencia respiratoria mecánica: 7,7±9 días. Traqueostomía fue realizada en 7,6% (n: 39) de los pacientes; indicación más frecuente: intubación prolongada 40,6% (n: 13), en promedio en el día 17, de estos 87.1% (n: 34) fueron dados de alta con traqueostomía. Falla en la extubación: 10,4%( n: 53) y las causas más comunes fueron: mal manejo de secreciones y mala mecánica respiratoria 17% (n: 9). La mortalidad global fue de 52,6% (n: 269). Complicaciones más frecuentes: neumonía en 31,7% (n: 53), complicaciones mecánicas relacionadas al tubo traqueal 16,2% (n: 27), atelectasia: 12% (n: 20), autoextubación: 9% (n: 15), complicación de la traqueostomía: 7,8% (n: 13). Mortalidad global en pacientes con complicaciones relacionadas a la asistencia fue 49,7% (n: 83) y mortalidad atribuible a complicaciones de ARM fue del 34,9% (n: 29). La complicación más frecuentemente asociada con la muerte fue la neumonía (p=0.03). Conclusión: La Asistencia Respiratoria Mecánica es frecuente, con complicaciones asociadas, neumonía la principal y de peor pronóstico. Palabras clave: Asistencia Respiratoria Mecánica, Complicaciones, Neumonía

Optical spectroscopy in the 400-1700nm wavelength range was performed on rare earth doped heavy metal fluoride (HMF) glasses. In the present work In-based fluoride glasses with a fixed 2 mol % YbF3 concentration and an ErF3 content ranging from 0 to 8 mol % were investigated. According to the experimental spectroscopic data a dependence in the absorption coefficient, the photoluminescence intensity and in the radiative lifetime could be verified as a function of the ErF3 content. In addition, at liquid nitrogen temperature, light emission corresponding to indirect transitions in the infrared energy range could be easily observed as a consequence of the low phonon frequency characteristic of this class of fluoride glasses. For all the studied compositions, strong upconversion to the green and red light was observed by pumping these Er3+- and Yb3+-doped HMF glasses with 790 and 980nm photon sources.