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Con este trabajo pretendemos orientar al profesorado de ELE en la introducción de secuencias formulaicas (SF) en el aula de acuerdo con el criterio de frecuencia. Se trata de ofrecer datos objetivos para su nivelación desde los niveles A1 a C2. Hemos seleccionado 3260 SF del Plan Curricular del Instituto Cervantes (PCIC) y hemos analizado su frecuencia en Google, como motor de búsqueda general, y en tres corpus lingüísticos especializados en el español: dos de la RAE (CREA y CORPES XXI) y el corpus de Mark Davies (Corpus del Español). Nuestro objetivo es establecer un índice de frecuencia para su nivelación, comprobando igualmente si existe un grado de coincidencia entre la frecuencia y el nivel establecido en el PCIC. Finalmente, completamos dicho índice de frecuencia con el análisis de las 100 SF más frecuentes atendiendo a otros criterios, rentables comunicativamente, de tipo lexicométrico, lingüístico y nociofuncional. Palabras clave: competencia léxica; secuencias formulaicas; corpus lingüísticos; enseñanza de español LE/L2; niveles de enseñanza/aprendizaje; frecuencia léxica

Fetal Heart Quantification (FetalHQ(®)) is a novel speckle tracking software that permits the study of global and regional ventricular shape and function from a 2D four-chamber-view loop. The 4D-Spatio Temporal Image Correlation (STIC) modality enables the offline analysis of optimized and perfectly aligned cardiac planes. We aimed to evaluate the feasibility and reproducibility of 4D-STIC speckle tracking echocardiography (STE) using FetalHQ(®) and to compare it to 2D STE. We conducted a prospective study including 31 low-risk singleton pregnancies between 20 and 40 weeks of gestation. Four-chamber view volumes and 2D clips were acquired with an apex pointing at 45° and with a frame rate higher than 60 Hz. Morphometric and functional echocardiography was performed by FetalHQ(®). Intra- and interobserver reproducibility were evaluated by the intraclass correlation coefficient (ICC). Our results showed excellent reproducibility (ICC > 0.900) for morphometric evaluation (biventricular area, longitudinal and transverse diameters). Reproducibility was also good (ICC > 0.800) for functional evaluation (biventricular strain, Fractional Area Change, left ventricle volumes, ejection fraction and cardiac output). On the contrary, the study of the sphericity index and shortening fraction of the different ventricular segments showed lower reproducibility (ICC < 0.800). To conclude, 4D-STIC is feasible, reproducible and comparable to 2D echocardiography for the assessment of cardiac morphometry and function.

Psicosom��tica y Psiquiatr��a, N��m. 1 (2017): abril-mayo-junio

PURPOSE: We present a modified version of the SISCOM procedure that uses interictal PET instead of interictal SPECT for seizure onset zone localization. We called this new nuclear imaging processing technique PISCOM (PET interictal subtracted ictal SPECT coregistered with MRI). METHODS: We retrospectively studied 23 patients (age range 4-61 years) with medically refractory epilepsy who had undergone MRI, ictal SPECT, interictal SPECT and interictal FDG PET and who had been seizure-free for at least 2 years after surgical treatment. FDG PET images were reprocessed (rFDG PET) to assimilate SPECT features for image subtraction. Interictal SPECT and rFDG PET were compared using statistical parametric mapping (SPM). PISCOM and SISCOM images were evaluated visually and using an automated volume of interest-based analysis. The results of the two studies were compared with each other and with the known surgical resection site. RESULTS: SPM showed no significant differences in cortical activity between SPECT and rFDG PET images. PISCOM and SISCOM showed equivalent results in 17 of 23 patients (74%). The seizure onset zone was successfully identified in 19 patients (83%) by PISCOM and in 17 (74%) by SISCOM: in 15 patients (65%) the two techniques showed concordant successful results. The volume of interest-based analysis showed no significant differences between PISCOM and SISCOM in identifying the extension of the seizure onset zone. However, PISCOM showed a lower amount of indeterminate activity due to propagation, background or artefacts. CONCLUSION: Preliminary findings of this initial proof-of-concept study suggest that perfusion and glucose metabolism in the cerebral cortex can be correlated and that PISCOM may be a valid technique for identification of the seizure onset zone. However, further studies are needed to validate these results.

The amount and composition of lipids stored in seeds of oil crops are the main determinants of their industrial yield and quality. Breeders have attempted to increase seed oil concentration to obtain higher industrial yields, and to modify seed oil fatty acid composition according to industrial demands. Nevertheless, both traits can also be modified by environmental conditions prevailing during seed filling in the mother plant. Several environmental factors have been found to affect the final seed oil concentration and the fatty acid composition as well. Moreover, predictions related to the effect of climate change on oil quality have been reported considering those environmental factors on seed reserves synthesis. However, seeds are not only the harvest organ for industrial use but also are the perpetuation organ of the species. It is known that germination performance is affected by external factors (i.e., the environment) but also by intrinsic seed factors. Therefore, it is necessary to understand how variations in seed oil concentration and fatty acid composition may in turn affect germination. There is scarce information regarding these effects, but nevertheless its impact can be significant for the crop establishment. In this chapter we describe the variability in seed oil concentration and lipid fatty acid composition among species and within species. The effects of both genetics and the environmental conditions prevailing during the seed filling in the mother plants are considered. Then, available information concerned the effects of seed oil concentration and lipid composition on germination performance is reviewed

Fil: Martínez, R. D. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Fil: Cirilo, Alfredo G. Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Agropecuaria Pergamino; Argentina. Fil: Cerrudo, A. Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Agropecuaria Balcarce; Argentina. Fil: Andrade, Fernando Héctor. Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Agropecuaria Balcarce; Argentina. Fil: Reinoso, L. Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Agropecuaria Valle Inferior del Río Negro; Argentina. Fil: Valentinuz, Oscar Rodolfo. Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Agropecuaria Paraná; Argentina. Fil: Balbi, Celsa Noemí. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias; Argentina. Fil: Izquierdo, N. G. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Starch composition of maize grains is of great importance when used in animal feed and many processing industries. Maize production involves hybrids with different kernel composition and hardness, sown at areas that range from subtropical to temperate cold climates. Therefore, it is relevant to understand how the environment influences starch composition. The objective of this work was to analyze the effect of location and sowing date on starch composition of maize grains. Field experiments were carried out at five locations across the argentinean maize-production area during two growing seasons. At each location, two sowing dates and three hybrids differing in endosperm hardness (i.e. semi-dent, a semi-flint and flint) were evaluated. Late sowing dates reduced amylose percentage and amylose/starch ratio. This last variable increased as latitude decreased. Minimum temperature during effective grain filling period explained those latitude and sowing date effects. This finding would be helpful to estimate starch composition of maize kernels to be expected in order to satisfy specific end uses.

This paper provides an account of the progress of SciencePro, an innovative, interdisciplinary and interinstitutional education project, whose ultimate aim is to improve student teachers’ knowledge, abilities and attitudes for teaching Natural Sciences in a foreign language. The team is working on the development of good practices at university level: enhancing profi ciency of cross-curricular competences, including scientific contents, knowledge and foreign language skills oriented to scientific discourse, with a view to developing a more appropriate teaching approach. The Practicum period is needed in order to test out the improvement of these specific professional competences, which should be more suitable to modern bilingual school contexts. El contenido de este artículo da cuenta de los avances de SciencePro, un proyecto de innovación educativa, de carácter interdisciplinar e interinstitucional, cuyo fin último se dirige a la mejora del conocimiento, aptitudes y actitudes de los futuros maestros para la enseñanza de la asignatura de Ciencias Naturales en una lengua extranjera. El equipo trabaja en el desarrollo de buenas prácticas –en el nivel universitario– que den lugar al dominio de competencias transversales –incluyendo contenidos científicos, conocimiento y destrezas en lengua extranjera orientadas hacia el discurso científico y un enfoque metodológico adecuado. El periodo de Prácticum nos sirve para comprobar la mejora de aquellas competencias profesionales específicas que más se adecúan a los contextos escolares bilingües.