Nivel de satisfacción de las mujeres, en la atención del parto vaginal en la sala de puerperio fisiológico del Hospital Bertha Calderon Roque en el período de Abril–Agosto del 2014

La satisfacción de la mujer con la experiencia delnacimiento de su hijo es un indicador importante en la calidad de los servicios de atención obstétricos. El presente estudio se realizó bajo el marco conceptual de Mackey Childbirth Scale 1998). El cual considera cinco componentes de la satisfacción: ella misma, hijo, enfermera, médico y acompañante.El objetivo del presente trabajo fue determinar la satisfacción materna con la experiencia del nacimiento de su hijo considerando a la parturienta como un todo en su evaluación integral.Se realizó un estudio descriptivo de corte trasversal, con muestreo probabilístico en las salas de puerperio fisiológico mediato del Hospital Bertha Calderón, se contó con una población a estudio de 240 puérperas, como instrumento de medición se tomó en cuenta la escala antes descrita. Para su análisis estadístico se interpretó en porcentajes y frecuencias.Entre los hallazgos encontrados en este estudio se encontró el principal grupo etario que dio a luz fue las edades comprendidas entre 21 y 25 años, con escolaridad secundaria, unión estable de ocupación de ama de casa. Como tal se logró apreciar que las pacientes clasifican su experiencia de parto como positiva durante su proceso de parto vaginal

Antiretroviral Treatment for HIV Elite Controllers?

In most HIV-infected persons, the natural history of untreated infection is one of sustained viremia, progressive CD4 T cell depletion with resultant morbidity and mortality. The advent of effective combination antiretroviral therapy (ART) that controls HIV replication has altered this landscape dramatically. Yet a rare population of HIV-infected persons-elite controllers (EC)-can control HIV replication such that plasma levels of virus are "undetectable" without ART. The EC phenotype is heterogeneous, with some subjects durably controlling the virus-persistent elite controllers-and some eventually losing viral control-transient elite controllers. Overall, EC tend to have robust HIV-specific T cell responses and in some cases, mainly in transient elite controllers, elevated activation and inflammation indices that diminish with ART suggesting that endogenous defenses against this persistent pathogen come at the cost of heightened activation/inflammation. A limited data set suggests that cardiovascular disease risk as well as the occur-rence of other morbid events may be greater in the overall EC population than in treated HIV infection. ART in EC decreases activation indices but does not appear to increase circulating CD4 T cell numbers nor do we know if it alters clinical outcomes. Thus, it is difficult to recommend or discourage a decision to start ART in the EC population but the authors lean toward treatment particularly in those EC whose activation indices are high and those who are progressively losing circulating CD4 T cell numbers. Biomarkers that can reliably predict loss of virologic control and immune failure are needed

Discovery of an Unbound Hyper-Velocity Star in the Milky Way Halo

We have discovered a star, SDSS J090745.0+024507, leaving the Galaxy with a heliocentric radial velocity of +853+-12 km/s, the largest velocity ever observed in the Milky Way halo. The star is either a hot blue horizontal branch star or a B9 main sequence star with a heliocentric distance ~55 kpc. Corrected for the solar reflex motion and to the local standard of rest, the Galactic rest-frame velocity is +709 km/s. Because its radial velocity vector points 173.8 deg from the Galactic center, we suggest that this star is the first example of a hyper-velocity star ejected from the Galactic center as predicted by Hills and later discussed by Yu & Tremaine. The star has [Fe/H]~0, consistent with a Galactic center origin, and a travel time of <80 Myr from the Galactic center, consistent with its stellar lifetime. If the star is indeed traveling from the Galactic center, it should have a proper motion of 0.3 mas/yr observable with GAIA. Identifying additional hyper-velocity stars throughout the halo will constrain the production rate history of hyper-velocity stars at the Galactic center.Comment: 4 pages, submitted to ApJ Letter

Green Preparation of PtRu and PtCu/SBA-15 Catalysts using Supercritical CO2

Sustainability is emerging as design criteria in catalysts production. Hence, the preparation of Pt bimetallic catalysts using supercritical CO2 (scCO2) as a green solvent is proposed. PtRu and PtCu nanoparticles (NPs) were deposited on mesoporous SiO2 SBA-15 by the reduction of Pt, Ru and Cu metalorganic precursor in scCO2. The simultaneous and sequential deposition of both metals was attempted using different reduction methodologies. The materials were characterized by X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and Energy-Dispersive X-ray analysis (EDX). XRD patterns matched closely that of cubic Pt. TEM images showed small NPs homogeneously distributed throughout the SBA-15 mesopores. Smaller particles were obtained when the reduction was performed in H2/N2 at low pressure. Sequential deposition of Cu or Ru in the first place followed by Pt yielded equimolar metal ratios. Samples prepared by sequential deposition were studied by Scanning Transmission Electron Microscopy (STEM). Composition profiles of the PtRu samples suggested an alloy structure. These catalysts were used in the hydrogenation of the renewable furfural in scCO2 at 80ºC. PtRu materials presented a high activity and selectivity to furfuryl alcohol