Dynamic nuclear polarization enhanced solid-state NMR studies of surface modification of gamma-alumina

Dynamic nuclear polarization (DNP) gives large (>100-fold) signal enhancements in solid-state NMR spectra via the transfer of spin polarization from unpaired electrons from radicals implanted in the sample. This means that the detailed information about local molecular environment available for bulk samples from solid-state NMR spectroscopy can now be obtained for dilute species, such as sites on the surfaces of catalysts and catalyst supports. In this paper we describe a DNP-enhanced solid-state NMR study of the widely used catalyst gamma-alumina which is often modified at the surface by the incorporation of alkaline earth oxides in order to control the availability of catalytically active penta-coordinate surface Al sites. DNP-enhanced 27Al solid-state NMR allows surface sites in gamma-alumina to be observed and their 27Al NMR parameters measured. In addition changes in the availability of different surface sites can be detected after incorporation of BaO

Immobilization of selenite onto natural siderite (FeCO3)

The sorption processes of metals and semimetals on siderite are being studied because of the potential adequacy of the mineral for removing contaminants from natural waters and because of its formation during the reduction of iron(III) (hydr)oxides under anaerobic conditions in the presence of organic matter or bacteria. This transformation could involve the release of contaminants previously sorbed on the iron(III) (hydr)oxides. In this work, the sorption of selenite on natural siderite (Bordes de Conflent, Lleida, Spain) is experimentally studied and the results obtained are compared to the previous results on selenite sorption on magnetite, hematite and goethite.Results indicate that the process of sorption was very fast; the equilibrium was reached in less than 1 hour, which indicates that sorption will not be kinetically controlled. The experimental data were fitted with a non-competitive Langmuir isotherm, which would indicate that the main process for the decrease of selenite in solution would be its sorption on siderite via monolayer coverage of the solid surface. The values of maximum sorption capacity of siderite obtained at pH 7,1 and 8,0 were 6,9 10-7 and 6,4 10-7 mol g-1, respectively and the same value of Langmuir constant was obtained for both pH values, 4,7 104 L mol-1.Postprint (published version

Diferencias metodológicas entre la enseñanza de salsa y de danza contacto. Revisión sistematizada de la videografía.

A la hora de la enseñanza en la educación física, se pueden utilizar distintas metodologías para transmitir los conocimientos. Este estudio tiene como objetivo analizar las diferencias metodológicas entre dos disciplinas dentro de la Danza: la salsa y la danza contacto. Para ello, la metodología que se ha llevado a cabo ha sido una revisión sistematizada de la videografía en el sitio web Google Videos. Los resultados muestran por parte de la salsa una utilización del estilo de enseñanza de mando directo, mientras que en danza contacto una combinación del estilo que fomenta la creatividad y el de modificación de mando directo. Los resultados respecto a los canales de desarrollo, estrategias en la práctica y feedback utilizado corresponden con el respectivo estilo de enseñanza en ambos casos. Se ha evidenciado una utilización exclusiva de los estilos tradicionales en salsa, generando un menor desarrollo de las capacidades del practicante. Sin embargo, en danza contacto este desarrollo sí que se ha producido, debido a la combinación con las metodologías que fomentan la creatividad.<br /

Comparación del impacto entre una metodología creativa y otra tradicional en diferentes escalas del autoconcepto, en una UD de danza/EC aplicada en adolescentes.

El presente estudio consiste en la realización de una investigación cuasiexperimental en adolescentes, en la que se pretende comparar el impacto entre una metodología creativa y otra tradicional, sobre distintos parámetros del autoconcepto, en una Unidad Didáctica de danza y expresión corporal. Para ello, se han aplicado los cuestionarios CAPIACE, varias escalas del CAF, APE y AUSO al principio y al final de la intervención, a un total de 42 estudiantes de 4º de ESO de un IES de la ciudad de Zaragoza. Los resultados no han mostrado significación estadística entre el impacto de ambas metodologías, ni de forma global ni por sexos, así como tampoco entre el pretest y el postest. En consecuencia, queda a merced de futuras investigaciones, la realización de estudios en la misma línea, que aconsejamos que sea con una extensión temporal y de muestra mayores.<br /

Antibiotic resistance of Staphylococcus aureus associated with subclinical and clinical mastitis in Uruguay during an eight-year period

Records of in vitro susceptibility tests performed between 2008 and 2015 were retrospectively reviewed in order to evaluate the dynamic profiles of possible changes in antimicrobial resistance of Staphylococcus aureus isolated from milk samples of cows with subclinical mastitis from 12 different Uruguayan Provinces. The results of 1,631 isolates tested by disk diffusion techniquefor susceptibility to penicillin and erythromycin were analysed. The possible tendency or changes in the behaviour of this pathogen against penicillin and erythromycin in the 8 year period was evaluated using the chi-square tests for trend and the homogeneity. The highest rate of resistance was observed for penicillin (36.9% in 2010), while erythromycin showed a resistance rate significantly lower (5.7% in 2015). The test for trend showed a significant trend towards decreased resistance to penicillin, whereas for erythromycin an increased resistance trend was observed. The determination of the scope of the problem is essential for the formulation and monitoring of effective response to anti-microbial resistance (AMR). Antibiotic assessment in Uruguay is now being reviewed with the objective of limiting antibiotics prescription to professionals trained to select a successful therapy, choosing the appropriated drug and treatment duration according each situation. To generate knowledge on the magnitude and tendency of the AMR problem using country-specific information must be a priority

El alcohol entre la vida y la obra de Toulouse-Lautrec

A través de diferentes apartados recogidos en el índice y desde una visión práctica de la psicología clínica, se trabajan aspectos importantes de la vida y también de la obra de un autor-pintor tratado injustamente durante mucho tiempo y conocido mas por su linaje y discapacidad, que por la relevancia en su proceso hacia el síndrome dependencia alcohólica (s.d.a.), trasladable a cualquier bebedor social de nuestra zona vitivinícola mediterránea, o por la consideración amplia y completa de su obra y de su influencia en otros que de no haber sido por su pincel, no habrían sido conocidos ni reconocidos. Destacamos parcelas interesantes como la referente a la relación de nuestro pintor con su madre, con su padre y con la familia extensa, así como su recorrido de la mano del alcohol hasta instaurarse la dependencia y por último su evolución y deceso. Para finalizar señalamos algunos rasgos psicopatológicos que ofrecen una visión diferente a las recogidas hasta ahora, así como un análisis formal de algunas de sus obras donde esta representado de forma explícita el alcohol

Development and validation of a questionnaire to assess adherence to the healthy food pyramid in Spanish adults

We aimed to design and validate a new questionnaire of adherence to healthy food pyramid (HFP) (AP-Q), to improve previous instruments. The questionnaire was self-administered and included 28 questions from 10 categories (physical activity, health habits, hydration, grains, fruits, vegetables, oil type, dairy products, animal proteins, and snacks). A population of 130 Spanish adults answered it, obtaining scores from each category and a global score of HFP adherence (AP-Q score). Validation was performed through principal components analysis (PCA) and internal consistency by Cronbach’s alpha. AP-Q was also externally validated with Kidmed-test, answered by 45 individuals from the cohort. The global AP-Q score was 5.1 1.3, with an internal consistency of 64%. The PCA analysis extracted seven principal components, which explained 68.5% of the variance. The global AP-Q score was positively associated with Kidmed-test score. Our data suggest that AP-Q is a complete and robust questionnaire to assess HFP adherence, with several advantages: easy to complete, cost-e ective, timesaving and has the competency to assess, besides diet, several features a ecting health status, lacking in other instruments. We suggest that AP-Q could be useful in epidemiological research, although it requires additional calibration to analyze its reproducibility and validation in other populationsFinanced by Universidad Autónoma de Madrid-Khon Kaen University (KKU: 0514.7.I.12-1948

Plasma oxidative status in preterm infants receiving LCPUFA supplementation: A pilot study

After birth, preterm infants are deficient in arachidonic acid (ARA), docosahexaenoic acid (DHA), and antioxidants, increasing their risk of oxidative stress-related pathologies. The principal aim was to evaluate if supplementation with long-chain polyunsaturated fatty acids (LCPUFAs) improves antioxidant defenses. In total, 21 preterm infants were supplemented with ARA and DHA in a 2:1 ratio (ARA:DHA-S) or with medium-chain triglycerides (MCT-S). Plasma n-3 and n-6 LCPUFAs were measured at birth, postnatal day 28, and 36 weeks of postmenstrual age (36 WPA) by gas chromatography–mass spectroscopy. Plasma antioxidants (glutathione (GSH), catalase, and thiols) and oxidative damage biomarkers (malondialdehyde (MDA), carbonyls) were analyzed at the same time points by spectrophotometry, and scores of antioxidant status (Antiox-S) and oxidative damage (Proxy-S) were calculated. At 36 WPA, linoleic acid (LA) and dihomo- -linolenic acid (DGLA) were decreased in ARA:DHA-S compared to the MCT-S group (LA: ARA:DHA-S = 18.54 1.68, MCT-S = 22.80 1.41; p = 0.018; DGLA: ARA:DHA-S = 1.68 0.38, MCT-S = 2.32 0.58; p = 0.018). Furthermore, -linolenic acid (ALA) was increased in ARA:DHA-S (ARA:DHA-S = 0.52 0.33, MCT-S = 0.22 0.10; p = 0.018). Additionally, LA:DHA ratio was decreased in the ARA:DHA-S compared to control group (ARA:DHA-S = 6.26 2.35, MCT-S = 8.21 2.65; p = 0.045). By the end of supplementation (36 WPA), catalase, thiol groups, and Antiox-S were significantly higher in neonates receiving ARA:DHA-S compared to those receiving MCT-S, with no di erences in oxidative stress biomarkers. In conclusion, ARA:DHA supplementation in preterm neonates resulted in an overall improvement in antioxidant to oxidant balance and a decrease in early fatty acid precursors of the n-6 relative to the n-3 pathway. These e ects may reduce oxidative stress and inflammationThis research was funded by National Program I+D+i, grant number FEM2015-63631-R (co-founder with FEDER founds), and by ISCIII, grant number PI16/0060