RESUMEN La craneosinostosis sagital es el cierre prematuro de la sutura sagital, ocasionando alteraciones funcionales y estructurales. El tratamiento es quirúrgico, y actualmente se cuenta con diversas técnicas, las cuales requieren de una planificación y entrenamiento para lograr óptimos resultados. Se presenta el caso de un varón de 1 año presenta crecimiento anteroposterior anormal del cráneo, indicándose tomografía cerebral sin contraste evidenciando una sinostosis sagital. Se realiza la planificación quirúrgica de la técnica a desarrollar mediante modelo 3D personalizado a escala real. Paciente cursa con buena evolución y es dado de alta. Finalmente, la tecnología de clonación 3D esencial para la educación y desarrollo neuroquirúrgico permitiendo acceder a modelos táctiles de alta precisión y bajo costo que mejoran la calidad del manejo de craneosinostosis.

ABSTRACT Sagittal craniosynostosis is the premature closure of the sagittal suture, causing functional and structural alterations. The treatment is surgical, and there are currently various techniques, which require planning and training to achieve optimal results. We present the case of a 1-year-old male with abnormal anteroposterior growth of the skull, indicating brain tomography without contrast, showing sagittal synostosis. Surgical planning of the technique to be developed is carried out using a real-scale personalized 3D model. The patient progresses well and is discharged. Finally, essential 3D cloning technology for neurosurgical education and development allows access to high-precision, low-cost tactile models that improve the quality of craniosynostosis management.

RESUMO As origens das danças para o povo são de grande apreço, tanto pelo bem que esta prática física produz como pelo sentido cultural que ela traz. A tecelagem de fitas pode ser considerada uma dança ancestral ou um produto da dança mestiça e igualmente um legado que anima tanto a cultura física como as tradições culturais dos seus praticantes. Pode eventualmente, vir do povo Panzaleo ou de outros povos das terras altas equatorianas. Com base num estudo etnográfico e na utilização de fontes orais, fotográficas e de vídeo, foi examinada a origem, o simbolismo, as mudanças e a persistência desta tradição. Neste sentido, o objetivo da investigação é: promover a ligação entre este evento e a atividade física, a sua origem, simbolismo e a validade desta tradição na sua Paróquia de Pastocalle. O estudo é etnográfico, utilizando a técnica da observação científica com um registo anedótico e a entrevista com um guia semiestruturado de perguntas e o portfólio de fotografias e vídeos. Os inquiridos não podem dizer exatamente quando se realizou a tecelagem das fitas, nem se esta dança teve origem na Freguesia, como também é realizada em outras aldeias próximas. Conclui-se que o traje original descrito é típico da Paróquia de Pastocalle, que a tecelagem de fitas teve origem no povo Kichua Panzaleo e que está atualmente em processo de consolidação como uma referência simbólica da Paróquia.

ABSTRACT The origins of the dances for the people have a high value, both for the good that this physical activity produces and for the cultural significance it provides. La tejida de cintas can be considered as an ancestral dance or a dance product of miscegenation and equally considered as a legacy that animates both the Physical Culture and the cultural traditions of its practitioners. It is possibly originally from the Panzaleo people or from other towns in the Ecuadorian highlands. Based on an ethnographic study and the use of oral, photographic and video sources, its origin, symbolism, changes and persistence of this tradition were analyzed. In this sense, the objective of the research is: to promote the link between this manifestation and physical activity, its origin, symbolism and the validity of this tradition in the parish of Pastocalle. The study is ethnographic, using the technique of scientific observation with an anecdotal record and the interview with a guide of semistructured questions and the portfolio of photos and videos. The interviewees are not able to specify the exact time of validity of La tejida de cintas, nor if this dance is native to the parish, since it is also performed in other nearby towns. It is concluded that the original costume described is typical of the Pastocalle parish, that La tejida de cintas originated in the Kichua Panzaleo people and that it is currently in the process of consolidating itself as a symbolic parochial reference.

RESUMEN Los orígenes de los bailes para los pueblos tienen un alto valor, tanto por el bien que produce esta actividad física como por el significado cultural que provee. La tejida de cintas puede ser considerada como una danza ancestral o un baile producto del mestizaje e igualmente considerada como un legado que anima tanto a la Cultura Física, como a las tradiciones culturales de sus practicantes. Posiblemente es originario del pueblo Panzaleo o de otros pueblos de la sierra ecuatoriana. Sobre la base de un estudio etnográfico y la utilización de fuentes orales, fotográficas y videos, se analizaron su origen, la simbología, los cambios y persistencias de esta tradición. En tal sentido, el objetivo de la investigación es: promover el vínculo que guarda esta manifestación con la actividad física, su origen, la simbología y la vigencia de esta tradición en la parroquia de Pastocalle. El estudio es etnográfico, utilizando la técnica de la observación científica con un registro anecdótico y la entrevista con una guía de preguntas semiestructurada y el portafolio de fotos y videos. Los entrevistados no pueden precisar con exactitud la época de vigencia de la tejida de cintas, ni tampoco si este baile es originario de la parroquia, ya que también se realiza en otros pueblos cercanos. Se concluye que el vestuario original descrito es propio de la parroquia Pastocalle, que la tejida de cintas es originario del pueblo kichua Panzaleo y que actualmente está en proceso de consolidarse como referente simbólico parroquial.

Resumen Objetivo Presentar la resolución quirúrgica de un caso clínico poco frecuente en un paciente pediátrico luego de haber sufrido la herniación traumática de la Bola Adiposa de Bichat. Caso clínico Un paciente de 3 años concurre a la guardia del Hospital Interzonal Especializado Materno Infantil “Don Victorio Tetamanti” de Mar del Plata, luego de haber sufrido un traumatismo que le provocó el desplazamiento parcial de la Bola Adiposa de Bichat. Si bien este tipo de urgencias es poco frecuente, es importante tener los conocimientos para un correcto diagnóstico y tratamiento.

Abstract Aim To present the surgical resolution of an infrequent clinical case in a pediatric patient who suffered traumatic herniation of Bichat’s fat pad. Clinical case A 3-year-old patient who visited the Emergency Service at the “Don Victorio Tetamanti” Hospital in Mar del Plata after suffering a trauma which caused the partial displacement of Bichat’s fat pad. Although this type of emergency is quite rare, it is important to know how to perform proper diagnosis and treatment.

RESUMEN Los aneurismas de la arteria comunicante anterior son complejos y requieren de tratamiento endovascular o microquirúrgico según sus características. El uso de enfoques mínimamente invasivos en microcirugía continúa evolucionando. Presentamos el caso de un paciente de 34 años con un aneurisma cerebral no roto de AcoA de cuello ancho, con escala de Glasgow de 15 puntos. Se realizó un abordaje supraorbitario lateral más “clipaje” total del aneurisma usando angio fluoresceína intraoperatoria. Se logró el objetivo con seguridad y eficacia; al mismo tiempo se optimizó el tiempo quirúrgico y hospitalario, maximizando la comodidad del paciente, estética y reanudación a sus actividades tempranas.

SUMMARY Anterior communicating artery aneurisms (ACAA) are complex and require endovascular or microsurgery approaches. The use of minimally invasive microsurgery techniques is evolving. We present the case of a 34-yearold patient with a broad neck, non-broken, ACAA with a Glasgow coma scale of 15 points. A lateral supra-orbitary approach with total clipping of the ACAA using intra-operatory fluorescein angiography was performed. The objective was accomplished successfully and safe, optimizing both intra-operative and hospitalization times, thus,maximizing patient comfort, esthetic and prompt return to normal duties.

Abstract: The present study exemplifies an action research-based approach for addressing the extent to which a process of explicit instruction of formulaic language supports the use of this type of vocabulary in middle school students’ short narrative written texts. The study was conducted at a private school in Chile, as a plan to help learners use different forms of expression in a written format. Data were obtained from a group of 23 Spanish-speaking learners of English before and after the intervention period. The action research methodology was implemented in order to collect and analyse written compositions as well as a survey for evaluating the treatment from the students’ perspective. The observation and reflection process led to positive outcomes in relation to the use of formulaic expressions in writing, and students’ opinion about the process also proved favourable. The pedagogical innovation is reflected upon theoretical and pedagogical perspectives. Implications applicable to teachers working in this and other contexts are also considered.

Resumen: El presente estudio muestra cómo un enfoque de investigación acción aborda la enseñanza explícita de lenguaje formulaico en estudiantes de 8vo básico y su efecto en el uso de éste en la escritura de textos narrativos en Inglés. El proceso de intervención fue realizado en un colegio privado en Chile. Los datos fueron obtenidos a partir de un grupo de 23 participantes siguiendo una metodología de investigación-acción que permitió recolectar y analizar información obtenida a través de textos escritos por los participantes en inglés y, a su vez, conocer su percepción sobre las diferentes estrategias implementadas y sobre su propia habilidad para usar estas expresiones. La innovación pedagógica, a partir de la cual se reflexionó tomando en cuenta perspectivas teóricas y pedagógicas, indicaron un efecto favorable en relación al uso de expresiones formulaicas en la habilidad de escritura. De igual manera, la opinión de los estudiantes muestra percepciones favorables sobre las estrategias implementadas en clases.

Abstract: One of the most meaningful milestones in pre-service teaching training involving research skills is the bachelor’s thesis process. This study seeks to identify the structural and methodological characteristics of the thesis work for the primary school teaching, nursery school teaching and special education programs of a Chilean university. Using a retrospective quantitative methodology, bibliometric indicators were elicited from 383 theses between the years 2010 and 2019 by means of a pre-piloted form. Results showed that there is a high compliance with the structural aspect of the thesis, while in the methodological aspect, the discussion section was found to be not as strong. Altogether, the theses include the formal aspects of its structure allowing for a well-organized scientific inquiry. However, improved methodological tools are required to better implement and conduct research toward aspects of pedagogical reflection.

Resumen: Uno de los hitos más significativos en la formación inicial docente relacionado con las habilidades investigativas es el proceso de tesis. Por ello, en este estudio se propone identificar las características estructurales y metodológicas de las tesis de pregrado de las carreras de Educación Básica, Educación Parvularia y Educación Diferencial de una Escuela de Educación en una universidad chilena. Bajo una metodología cuantitativa de corte retrospectivo, se extrajeron indicadores bibliométricos de 383 tesis de las carreras mencionadas entre los años 2010 y 2019, utilizando un formulario pre-pilotado. Los resultados mostraron que existe un alto cumplimiento en los aspectos de estructura de las tesis, no obstante, la sección de discusión presenta debilidades. Con todo, las tesis incorporan aspectos formales en la estructura, lo que ha permitido desarrollar indagaciones científicas bien organizadas. Sin embargo, se sugiere profundizar en las herramientas metodológicas para implementar y conducir las investigaciones hacia aspectos de reflexión pedagógica.

Titania-supported Ir catalysts were used in the hydrogenation of furfural. Reactions were carried out in a stirred batch type reactor at 0.62MPa and 363K using a 0.10M solution of furfural in a 1:1 mixture n-heptane -ethanol as solvent. Catalysts containing 2 wt% of Ir were reduced in H2 flow at different temperatures in the range 473-773K. The catalysts were characterized by H2 chemisorption, TEM, TPR, TPD of NH3 and XPS. Conversion of furfural is higher at lower reduction temperatures, but leads to byproducts whereas reduction at higher temperatures shows selectivity to furfuryl alcohol close to 100%.

The enantioselective hydrogenation of 1-phenyl-1,2-propanedione at 298K and pressure of 40 bar of H2 over zirconia supported Pt catalysts has been studied. Three different zirconia were prepared : i) ZrO2- P obtained by a precipitation procedure from ZrOCl2 ii) MSZrO2 obtained by a sol-gel procedure using cetryltrimethylammonium bromide (CTMABR) as surfactant to get a mesostructured solid iii) CNTsZrO2 obtained after impregnation of carbon nanotubes with ZrO(NO)3 followed by pyrolisis and calcination. Pt (1 wt%) was introduced on the support by impregnation of an aqueous solution of H2PtCl6. The catalysts were characterized by nitrogen adsorption-desorption isotherms at 77 K, hydrogen chemisorption, XRD and TEM techniques. The reactions were carried out in a stainless steel batch reactor using cyclohexane as solvent and cinchonidine as chiral modifier. The presence of CD in the reaction medium is necessary to induce an enantiomeric excess (ee) of the desired product R-1phenyl-1 hydroxi-2-propanone. In all the studied systems, the relation between the enantioselectivity and the CD concentration added in situ exhibits a bell type curve; indicative of the importance of competitive adsorption between the modifier and the substrate on the catalyst surface. On the other hand, confinement effect led to an important enhancement in the activity in those catalysts supported on mesostructured supports, mainly in the Pt/CNTsZrO2 catalyst.

Chiral organic-inorganic hybrids have been prepared from 1,3,5,7-tetramethylcyclotetrasiloxane (TMCTS), divynilbenzene (DVB) and a natural alkaloid (-)-Cinchonidine (CD). Different CD quantities were inserted into the solid by hydrosilylation reaction using Pt0(2) as catalyst. The obtained solids were used as supports of Ru which was deposited on the carrier from colloidal dispersion of the metal. Catalysts and supports were characterised by using Fourier Transformed Infrared Spectroscopy, X- Ray Diffraction, Electron Transmission Microscopy, N2 adsorption-desorption isotherms and X- Ray photoelectron spectroscopy. The catalysts were essayed in the hydrogenation of ethyl pyruvate at 298 K and 40 bar of hydrogen in a Parr-type reactor. The obtained results indicate that the catalytic activity of the hybrid catalysts is rather low and in those catalysts having CD in their structure, is possible to induce chirality towards the enantiomer R-lactate