Propiedades morfológicas y estructurales de recubrimientos nitruro de titanio aluminio producidos por magnetron sputtering tríodo

TixAl1-xN coatings were grown using the triode magnetron sputtering technique varying the bias voltage between -40 V and -150V. The influence of bias voltage on structural and morphological properties was analyzed by means of energy dispersive spectroscopLos recubrimientos TixAl1-xN se cultivaron usando la técnica de pulverización catódica con magnetrón triodo, variando el voltaje de polarización entre -40 V y -150V. La influencia del voltaje de polarización en las propiedades estructurales y morfológica

Methods employed in optical emission spectroscopy analysis: a review

In this work, different methods employed for the analysis of emission spectra are presented -- The proposal is to calculate the excitation temperature (Texc), electronic temperature (Te) and electron density (ne) for several plasma techniques used in the growth of thin films -- Some of these techniques include magnetron sputtering and arc discharges -- Initially, some fundamental physical principles that support the Optical Emission Spectroscopy (OES) technique are described; then, some rules to consider during the spectral analysis to avoid ambiguities are listed -- Finally, some of the more frequently used spectroscopic methods for determining the physical properties of plasma are describe

VP20.12 : Lymphangioma : fetal neck mass, delivery of pregnancy through EXIT technique – case report, University Hospital San Ignacio (HUSI)

Q1Lymphangioma is a rare type of benign tumour, caused by a lack of development of the lymphatic's system components. This malformation is an accumulation of fluid mainly located in the posterolateral region of the neck in 75% of cases, followed by armpit 20%, mediastinum 1%, abdominal organs, mesenteric retroperitoneal in 2–3% & bone, lower limbs in 2%. This develops in the second and third trimester. It could be aggressive due to the infiltration in adjacent tissues or closer organs, additionally, it could be associated with chromosomal abnormalities or other malformations, basically, the prognosis depends weather it is present or not. In isolated forms, these tumours have a good prognosis. In cases where the malformation is found on the neck in the first trimester, the assessment, behaviour, name, management and etiology could be different and it is called increased NT. The prenatal management includes serial ultrasound in maternal-fetal unit, karyotyping, MRI to see the level of infiltration and the associated airway obstruction, and multidisciplinary team experienced in airways management. In cases of cervical lymphangiomas, the gestation delivery should be done by a Caesarean section (CS) with an EXIT technique in order to guarantee the fetal airway before separation of the maternal-fetal circulation. it is imperative to set up the procedure through a multidisciplinary team meeting, in order to assign each of the roles in surgery and to know the additional materials or procedures in accordance with the fetal airway compromise. In this case the diagnosis was confirmed by maternal medicine team as a cervical lymphangioma in the HUSI in Bogotá through US performed on the 34.5 week. Additionally, we used an MRI to assess the fetal airway and after words we booked meetings with an interdisciplinary team with the objective of planning the procedures and materials required during the delivery through a CS with an EXIT technique, following the institutional protocols.Revista Internacional - Indexad

Grado de predicción de la motivación hacia las actividades físicodeportivas a través de la orientación de metas, la percepción del éxito y el grado de satisfacción. Un análisis transcultural.

El objetivo de este estudio fue conocer en qué medida se puede predecir el tipo de motivación hacia la práctica de actividad físicodeportiva en función de la orientación de metas, la percepción del éxito y el grado de satisfacción, mediante un análisis transcultural en tres países latinos: España, México y Costa Rica. Se evaluaron 2 168 escolares de edades entre 11 y 16 años, utilizando cuatro instrumentos: Sport Motivation Scale (SMS), Task and Ego Orientation Sport Questionnaire (TEOSQ), Satisfaction Instrument (SSI) y Beliefs about the Causes of Sport Success Questionnaire (BACS). Los resultados mostraron que valores altos en orientación a la tarea, diversión y esfuerzo pueden predecir significativamente la manifestación de motivación intrínseca en los sujetos de los tres países.post-print978 K

Validation of a Length-Adjusted Abdominal Arterial Calcium Score Method for Contrast-Enhanced CT Scans

BACKGROUND: The Agatston score on noncontrast computed tomography (CT) scans is the gold standard for calcium load determination. However, contrast-enhanced CT is commonly used for patients with atherosclerotic cardiovascular diseases (ASCVDs), such as peripheral arterial occlusive disease (PAOD) and abdominal aortic aneurysm (AAA). Currently, there is no validated method to determine calcium load in the aorta and peripheral arteries with a contrast-enhanced CT. This study validated a length-adjusted calcium score (LACS) method for contrast-enhanced CT scans.METHOD: The LACS (calcium volume in mm 3/arterial length in cm) in the abdominal aorta was calculated using four-phase liver CT scans of 30 patients treated between 2017 and 2021 at the University Medical Center Groningen (UMCG) with no aortic disease. Noncontrast CT scans were segmented with a 130 Hounsfield units (HU) threshold, and a patient-specific threshold was used for contrast-enhanced CTs. The LACS was calculated and compared from both segmentations. Secondly, the interobserver variability and the influence of slice thickness (0.75 mm vs. 2.0 mm) was determined. RESULTS: There was a high correlation between the LACS from contrast-enhanced CT scans and the LACS of noncontrast CTs ( R 2 = 0.98). A correction factor of 1.9 was established to convert the LACS derived from contrast-enhanced CT to noncontrast CT scans. LACS interobserver agreement on contrast-enhanced CT was excellent (1.0, 95% confidence interval = 1.0-1.0). The 0.75 mm CT threshold was 541 (459-625) HU compared with 500 (419-568) HU on 2 mm CTs ( p = 0.15). LACS calculated with both thresholds was not significantly different ( p = 0.63). CONCLUSION: The LACS seems to be a robust method for scoring calcium load on contrast-enhanced CT scans in arterial segments with various lengths.</p

Proceso para producir percarbonato de sodio a escala piloto

El proyecto de producir un agente blanqueador con base en percarbonato de sodio, bien conocido en otros países, surge a partir de su aplicación limitada en las industrias colombianas y debido a su alto costo y difi cultades para su importación. En tal sentido, se procede a evaluar su demanda actual, las condiciones adecuadas para obtenerlo en el laboratorio, su posible escalamiento y su factibilidad económica. El estudio de mercado muestra gran variabilidad en la demanda y en el precio de diferentes agentes blanqueadores. Se avalúan los productos de la competencia y se encuentra que el hipoclorito de sodio es el agente blanqueador más usado, con un 23% del consumo, seguido por el peróxido de hidrógeno (15%). El diseño experimental permite establecer las relaciones de los componentes de la mezcla reaccionante, para lograr el máximo rendimiento del 52,0% con respecto a la relación estequiométrica. Finalmente, con el análisis fi nanciero se concluye con la viabilidad del proyecto

Proceso para producir percarbonato de sodio a escala piloto

The idea of producing a sodium-percarbonate–based bleaching agent, well known in other countries, emerged from the minimum use of this product found in the Colombian chemical industry due to high cost and importing difficulties. In this sense, a current demand of the product is assessed, as well as the proper conditions to obtain it in the laboratory, the suspected scaling and the economic feasibility. The market survey resulted in a great variety of both the demand and prices of different bleaching agents. Competitor’s products were assessed finding sodium hypochlorite as the most commonly used bleaching agent, 23%, followed by hydrogen peroxide, 15%. The experimental design allows us to establish the connections of the reagent-mixture components to get a maximum yield of 52.0% regarding this stoichiometry connection. Finally, the feasibility of the project is concluded through the financial analysis.El proyecto de producir un agente blanqueador con base en percarbonato de sodio, bien conocido en otros países, surge a partir de su aplicación limitada en las industrias colombianas y debido a su alto costo y difi cultades para su importación. En tal sentido, se procede a evaluar su demanda actual, las condiciones adecuadas para obtenerlo en el laboratorio, su posible escalamiento y su factibilidad económica. El estudio de mercado muestra gran variabilidad en la demanda y en el precio de diferentes agentes blanqueadores. Se avalúan los productos de la competencia y se encuentra que el hipoclorito de sodio es el agente blanqueador más usado, con un 23% del consumo, seguido por el peróxido de hidrógeno (15%). El diseño experimental permite establecer las relaciones de los componentes de la mezcla reaccionante, para lograr el máximo rendimiento del 52,0% con respecto a la relación estequiométrica. Finalmente, con el análisis fi nanciero se concluye con la viabilidad del proyecto

Dietary protein safety and resistance exercise: what do we really know?

Resistance trainers continue to receive mixed messages about the safety of purposely seeking ample dietary protein in their quest for stimulating protein synthesis, improving performance, or maintaining health. Despite protein's lay popularity and the routinely high intakes exhibited by strength athletes, liberal and purposeful protein consumption is often maligned by "experts". University textbooks, instructors, and various forms of literature from personal training groups and athletic organizations continue to use dissuasive language surrounding dietary protein. Due to the widely known health benefits of dietary protein and a growing body of evidence on its safety profile, this is unfortunate. In response, researchers have critiqued unfounded educational messages. As a recent summarizing example, the International Society of Sports Nutrition (ISSN) Position Stand: Protein and Exercise reviewed general literature on renal and bone health. The concluding remark that "Concerns that protein intake within this range [1.4 – 2.0 g/kg body weight per day] is unhealthy are unfounded in healthy, exercising individuals." was based largely upon data from non-athletes due to "a lack of scientific evidence". Future studies were deemed necessary. This assessment is not unique in the scientific literature. Investigators continue to cite controversy, debate, and the lack of direct evidence that allows it. This review discusses the few existing safety studies done specific to athletes and calls for protein research specific to resistance trainers. Population-specific, long term data will be necessary for effective education in dietetics textbooks and from sports governing bodies

El Observatorio Nacional de Degradación de Tierras y Desertificación tiene un nuevo sitio piloto: subcuenca del arroyo Tortugas-Santa Fe.

El Observatorio Nacional de Degradación de Tierras y Desertificación es (ONDTyD) es un sistema nacional de evaluación y monitoreo de tierras a diferentes escalas basado en un abordaje integral, interdisciplinario y participativo. Surge tras la culminación del proyecto Evaluación de la Degradación de tierras en Zonas Áridas (LADA, por sus siglas en inglés), que sentó las bases para un sistema nacional permanente de evaluación y monitoreo estandarizada de la desertificación.EEA OliverosFil: Albizuri, L. Asesor independiente en Gestión Ambiental; ArgentinaFil: Berardi, José. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; ArgentinaFil: Capurro, Julia Ester. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros. Agencia de Extensión Rural Cañada de Gómez; ArgentinaFil: Cardozo, Francisco Victoriano. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros; ArgentinaFil: Caruso, Cecilia Alejandra. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros; ArgentinaFil: Devia, Edgardo Agustín. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros; ArgentinaFil: Di Leo, Néstor. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; ArgentinaFil: Di Leo, Néstor. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Instituto de Investigaciones en Ciencias Agrarias de Rosario (IICAR); ArgentinaFil: Jankovic, Veronica Vanina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros. Agencia de Extensión Rural Casilda; ArgentinaFil: Martínez, L. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros; ArgentinaFil: Montico, Sergio. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; ArgentinaFil: Montico, Sergio. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Instituto de Investigaciones en Ciencias Agrarias de Rosario (IICAR); ArgentinaFil: Pagani, Ricardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Oliveros. Agencia de Extensión Rural Las Rosas; Argentin