Partículas finas en el aire de locales gastronómicos con parrilla / Fine particles in the air of gastronomic places with grill

La exposición a humo ambiental en lugares cerrados es peligrosa para la salud. Las partículas de hasta 2,5 micras son marcadores del humo en los lugares cerrados. Este estudio monitoreó la calidad de aire en 4 locales gastronómicos de Asunción, Paraguay, y algunas condiciones que influyen en los niveles de exposición explorados. Los niveles más altos de partículas encontrados fueron 9,9 µg/m3. En ninguno de los locales estudiados se detectaron fumadores. Falta mayor investigación sobre contaminación del aire en lugares cerrados para una mejor protección de la salud.

Exposure to indoor smoke is hazardous to health. Particles up to 2.5 microns are smoke markers in enclosed places. This study monitored the air quality in 4 gastronomic places in Asunción, Paraguay, and some conditions that influence the levels of exposure explored. The highest levels of particles found were 9.3 µg / m3. In none of the premises studied were smokers detected. There is a lack of further research on indoor air pollution for better health protection.

Gate-opening effect in ZIF-8: the first experimental proof using inelastic neutron scattering.

The gate-opening phenomenon in ZIFs is of paramount importance to understand their behavior in industrial molecular separations. Here we show for the first time using in situ inelastic neutron scattering (INS) the swinging of the -CH3 groups and the imidazolate linkers in the prototypical ZIF-8 and ZIF-8@AC hybrid materials upon exposure to mild N2 pressure.

Improved mechanical stability of HKUST-1 in confined nanospace.

One of the main concerns in the technological application of several metal-organic frameworks (MOFs) relates to their structural instability under pressure (after a conforming step). Here we report for the first time that mechanical instability can be highly improved via nucleation and growth of MOF nanocrystals in the confined nanospace of activated carbons.

Manipulation of cellular spheroid composition and the effects on vascular tissue fusion.

Cellular spheroids were investigated as tissue-engineered building blocks that can be fused to form functional tissue constructs. While spheroids can be assembled using passive contacts for the fusion of complex tissues, physical forces can be used to promote active contacts to improve tissue homogeneity and accelerate tissue fusion. Understanding the mechanisms affecting the fusion of spheroids is critical to fabricating tissues. Here, manipulation of the spheroid composition was used to accelerate the fusion process mediated by magnetic forces. The Janus structure of magnetic cellular spheroids spatially controls iron oxide magnetic nanoparticles (MNPs) to form two distinct domains: cells and extracellular MNPs. Studies were performed to evaluate the influence of extracellular matrix (ECM) content and cell number on the fusion of Janus magnetic cellular spheroids (JMCSs). Results showed that the integration of iron oxide MNPs into spheroids increased the production of collagen over time when compared to spheroids without MNPs. The results also showed that ring tissues composed of JMCSs with high ECM concentrations and high cell numbers fused together, but exhibited less contraction when compared to their lower concentration counterparts. Results from spheroid fusion in capillary tubes showed that low ECM concentrations and high cell numbers experienced more fusion and cellular intermixing over time when compared to their higher counterparts. These findings indicate that cell-cell and cell-matrix interactions play an important role in regulating fusion, and this understanding sets the rationale of spheroid composition to fabricate larger and more complex tissue-engineered constructs.

Balance nitrogenado en el paciente crítico con nutrición enteral / Nitrogen balance in critical patients with enteral feeding

La evaluación del balance nitrogenada en pacientes criticos y en aquellos que reciben soporte nutricional se realiza con la estimación de las pérdidas de nitrógeno en orina midiendo en nitrogeno ureico urinario (NUU), el que representa la mayor parte de las plérdidas nitrogenadas. Dado que contamos con la posibilidad de realizar la determinación de nitrógeno total urinario (NTU) quisimos evaluar el impacto del soporte nutricional en el balance nitrogenado de los pacientes críticos. Objetivos: 1. evaluar el balance nitrogenado de los pacientes internados en terapia intensiva (UTI). 2. estudiar la evaluación del balance nitrogenado en pacientes ayunados y su evolución en el curso del soporte nutricional ...

[Tubal pregnancy after vaginal hysterectomy]. / Gravidanza tubarica in pregressa colpoisterectomia.

We report a case of woman who was admitted to the hospital for evaluation of abdominal pain, five years after a vaginal hysterectomy. Exploratory laparotomy was performed and tubal pregnancy found. A review of the literature reveals similar complications following supracervical and total or vaginal hysterectomy: it is a rare event and the common aspect of all cases is the inability to accurately diagnose before laparotomy.

Locus of control in couples with different patterns of alcohol consumption.

A sample of 175 individuals were interviewed and divided in three subgroups of couples: (1) the husband was in an Anonymous Alcoholics program, (2) the husband had been diagnosed as alcoholic and (3) the husband had a regular pattern of high alcohol consumption. In personal interviews by specialized personnel the following instruments were used: the Internal-External (I-E) Locus of control scale; the Health Dailing Living (HDL) questionnaire about alcohol-related problems and patterns. The results showed a trend towards internal locus of control in both spouses for the three subgroups. Nevertheless, there is evidence of a higher internal locus in husbands and wives with regular but light alcohol consumption. As has been reported elsewhere alcohol users who had less problems in their functioning have no problems due to their alcohol use pattern. In order to know to a fuller extent the meaning of internality, a factorial analysis was applied to the I-E scale, obtaining four factors: social system control, personal failure, fatalism and personal attainment. The latter three were more capable to differentiate between the samples with different alcohol use patterns.