Distribución espacial y temporal de tortugas marinas asociada a la temperatura superficial del mar y clorofila-a en aguas del Pacífico Central Mexicano

In this study we describe the spatial and temporal distribution of sea turtles and their association with oceanographic parameters in waters of the Mexican Central Pacific (MCP) during 2010 (winter, spring and autumn). Our results showed variations in sea turtle distribution through the sampling year. Sea turtle distribution was homogeneous in coastal and oceanic areas during winter; there was an association with thermal fronts generated by a current of cold water flowing from the northwest and a warm current coming from the south, as well as with the boundaries of a cyclonic gyre. Sea turtles were distributed in the coastal zone and the central part of the oceanic zone in spring, where the effects of a cyclonic gyre and coastal upwelling prevailed. The same distribution trend was recorded at the beginning of autumn, whereas oceanographic characteristics changed during the second sampling week, when upwelling occurred. Mating events were only recorded in autumn for olive ridley sea turtles (Lepidochelys olivacea), the dominant species in the region. It was concluded that sea turtles were distributed in the coastal zone of MCP waters in autumn due to reproductive activities, whereas in winter and spring sea turtles were distributed towards the central/oceanic region, potentially related to foraging activities.En este estudio se describe la distribución espacio-temporal de tortugas marinas y su relación con parámetros oceanográficos en el Pacífico Central Mexicano (PCM) durante el 2010 (invierno, primavera y otoño). Los resultados muestran variaciones en la distribución de tortugas marinas. En invierno, la distribución de tortugas fue homogénea en áreas costeras y oceánicas; asociadas a la presencia de frentes térmicos debido a la interacción de una corriente de agua cálida del sur y la intrusión de agua fría proveniente del noroeste, así como con los límites de un giro ciclónico. En primavera, la distribución de tortugas se concentró hacia la zona costera y parte central de la zona oceánica, donde prevalecieron los efectos de una surgencia y los límites de un giro ciclónico. El mismo patrón de distribución ocurrió al inicio de otoño, mientras que las condiciones oceanográficas cambiaron para la segunda semana de muestreo, cuando ocurrió la formación de una surgencia costera. Los eventos de apareamiento solo se registraron durante otoño para la tortuga golfina (Lepidochelys olivacea), la especie dominante de la región. Se concluye que en otoño el patrón de distribución de tortugas marinas fue hacia la zona costera del PCM, y se relacionó con actividades de reproducción; mientras que en invierno y primavera este patrón tendió a la región central/oceánica vinculado potencialmente con actividades de forrajeo

Investigación e impacto de materiales

A través de este proyecto, se buscó desarrollar e implementar metodologías que evalúen y generen la información que describe el desempeño de las empresas productoras de materiales, como consecuencia de su falta de regulación. Lo anterior, se logró a través de dos líneas de trabajo: una ecoetiqueta que permita certificar a las empresas mexicanas luego de la evaluación del impacto ambiental generado en las etapas del ciclo de vida de un material en específico y una base de datos que permite conocer las distintas opciones de materiales que cumplan las características necesarias para el producto deseado. Esto se logró con la con ayuda de las normas y leyes mexicanas, así como de las EPD’s internacionales y la metodología de Ashby. Finalmente, se obtuvo como resultado del proyecto cinco entregables: ECOMAT y su correspondiente manual de usuario, las metodologías necesarias para el acercamiento y seguimiento de empresas, un formato interno tipo EPD para los materiales de Materioteca ITESO, un formato mejorado de la ficha física de Materioteca ITESO y una base de datos de los tipos de materiales dentro de ésta última.ITESO, A.C

A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)

Meeting abstrac

Inside the Outbreak of the 2009 Influenza A (H1N1)v Virus in Mexico

Influenza viruses pose a threat to human health because of their potential to cause global disease. Between mid March and mid April a pandemic influenza A virus emerged in Mexico. This report details 202 cases of infection of humans with the 2009 influenza A virus (H1N1)v which occurred in Mexico City as well as the spread of the virus throughout the entire country.From May 1st to May 5th nasopharyngeal swabs, derived from 751 patients, were collected at 220 outpatient clinics and 28 hospitals distributed throughout Mexico City. Analysis of samples using real time RT-PCR revealed that 202 patients out of the 751 subjects (26.9%) were confirmed to be infected with the new virus. All confirmed cases of human infection with the strain influenza (H1N1)v suffered respiratory symptoms. The greatest number of confirmed cases during the outbreak of the 2009 influenza A (H1N1)v were seen in neighbourhoods on the northeast side of Mexico City including Iztapalapa, Gustavo A. Madero, Iztacalco, and Tlahuac which are the most populated areas in Mexico City. Using these data, together with data reported by the Mexican Secretariat of Health (MSH) to date, we plot the course of influenza (H1N1)v activity throughout Mexico.Our data, which is backed up by MSH data, show that the greatest numbers of the 2009 influenza A (H1N1) cases were seen in the most populated areas. We speculate on conditions in Mexico which may have sparked this flu pandemic, the first in 41 years. We accept the hypothesis that high population density and a mass gathering which took in Iztapalapa contributed to the rapid spread of the disease which developed in three peaks of activity throughout the Country

On the sensitivity of the HAWC observatory to gamma-ray bursts

We present the sensitivity of HAWC to Gamma Ray Bursts (GRBs). HAWC is a very high-energy gamma-ray observatory currently under construction in Mexico at an altitude of 4100 m. It will observe atmospheric air showers via the water Cherenkov method. HAWC will consist of 300 large water tanks instrumented with 4 photomultipliers each. HAWC has two data acquisition (DAQ) systems. The main DAQ system reads out coincident signals in the tanks and reconstructs the direction and energy of individual atmospheric showers. The scaler DAQ counts the hits in each photomultiplier tube (PMT) in the detector and searches for a statistical excess over the noise of all PMTs. We show that HAWC has a realistic opportunity to observe the high-energy power law components of GRBs that extend at least up to 30 GeV, as it has been observed by Fermi LAT. The two DAQ systems have an energy threshold that is low enough to observe events similar to GRB 090510 and GRB 090902b with the characteristics observed by Fermi LAT. HAWC will provide information about the high-energy spectra of GRBs which in turn could help to understanding about e-pair attenuation in GRB jets, extragalactic background light absorption, as well as establishing the highest energy to which GRBs accelerate particles

Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

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