Trachelomonas (Euglenophyta) from a eutrophic reservoir In Central Mexico

This study provides valuable information on the ultrastructure and environmental conditions of the Trachelomonas Ehr. (Euglenophyceae) genus in the Guadalupe Dam, a eutrophic reservoir located in the suburbs of Mexico City, which receives a considerable volume of wastewaters. Specimens were collected at surface level between November 2005 and May 2006. Using LM and SEM twelve taxa from phytoplankton were identified of which, 9 are new records for Mexico. The reservoir is warm monomictic, with basic pH values (7.4-10.1), a high concentration of chlorophyll a(18-101 microg l(-1), a permanent anoxic bottom, specific conductivity (K25) of 205 to 290 microS cm(-1), N-NO3, 0.19-1.2 mg l(-1) and P-PO4 0.22-1.6 mg l(-1). Water temperature was 15.6-23.0 degrees C. Most of the Trachelomonas species were found during the dry season, when concentrations of organic matter, nitrogen and phosphorus as well as the temperature were the highest. Higher species richness was also associated with the warmer months. This research contributes to increase our knowledge on Trachelomonas in Mexico and constitutes the first detailed description of lorica ultrastructure of 12 taxa that grow in a body of water with high concentration of nutrients and a moderate amount of mineral contents.Fil: Garduño Solorzano, Gloria. Universidad Nacional Autonoma de Mexico. Facultad de Estudios Superiores de Iztacala; MéxicoFil: Oliva Martinez, Maria Guadalupe. Universidad Nacional Autonoma de Mexico. Facultad de Estudios Superiores de Iztacala; MéxicoFil: Lugo Vázquez, Alfonso. Universidad Nacional Autonoma de Mexico. Facultad de Estudios Superiores de Iztacala; MéxicoFil: Mendoza Garfías, María Berenit. Universidad Nacional Autonoma de Mexico. Facultad de Estudios Superiores de Iztacala; MéxicoFil: Quintanar Zuñiga, Rafael Emiliano. Universidad Nacional Autonoma de Mexico. Facultad de Estudios Superiores de Iztacala; MéxicoFil: Conforti, Visitacion Teresa D.. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Visita virtual al museo fuego nuevo

Los museos son parte medular de la cultura de las naciones, ya que en su interior se resguardan aspectos valiosos del acervo histórico, artístico y científico de las diversas facetas del hombre. El Museo Fuego Nuevo, abarca muchos periodos históricos, por lo cual es parte esencial para describir la historia de México. El presente reporte, describe la realización de una Visita Virtual al Museo Fuego Nuevo por medio de una página accedida por Web, y de esta forma, fomentar las visitas personales a este tipo de lugares, además de ofrecer la difusión del patrimonio cultural

Effects of diets with whole plant-origin proteins added with different ratios of taurine:methionine on the growth, macrophage activity and antioxidant capacity of rainbow trout (Oncorhynchus mykiss) fingerlings

A 70-days feeding trial was performed to determine the effect of diets with whole plant-origin proteins added with different ratios of taurine:methionine on the growth, macrophage burst activity and antioxidant capacity of rainbow trout (Oncorhynchus mykiss) fingerlings. Triplicated groups of 70 fingerlings of an initial weight of 0.54±0.1 g (mean±±SD) were fed diets with soy protein isolate and Spirulina powder as protein sources (46% crude protein) and added (10 g/kg diet) with different taurine and methionine ratios: 0.0 and 10.0 (diet T0/M100), 2.5 and 7.5 (diet T25/M75), 5.0 and 5.0 (diet T50/M50), 7.5 and 2.5 (diet T75/M25) and 10.0 and 0.0 (diet T100/M0), respectively. At the end of the trial, growth performance, lipid and protein contents in liver and muscle, macrophage burst activity and liver antioxidant activity, were determined. The growth performance, macrophage burst activity and antioxidant activity were improved as the taurine increased in the diets. The ratio of 7.5 and 2.5 g/kg of taurine:methionine in diets with SPI and Spirulina powder as protein sources (diet T75/M25), seems to be the best inclusion for rainbow trout fingerlings

Percepción psicosocial del adolescente en familia homoparental y heteroparental

Objetivo: Conocer la diferencia entre las experiencias psicosociales del adolescente en familia homoparental y heteroparental.Metodología: Fue un estudio cualitativo de tipo explorativo y corte transversal usando el método fenomenológico para la interpretación de los resultados categorizados en macro y microcategorías.Resultados: Fueron presentados en cuadros que representan las categorías en macro y microcategorías, en el procesador de texto Microsoft Office Word 2007. De acuerdo a la interpretación de los datos se construyó la conclusión como parte final de la investigación.Discusión: En un estudio realizado en Estados Unidos por Suzanne Brown, Susan Smalling y Victor Groza, se destaca que la educación homoparental no influye en la orientación sexual de los hijos criados por estas parejas, sin embargo se ha evidenciado cierta discriminación por parte de la sociedad hacia ellos por lo que han tenido que buscar apoyo emocional para la familia completa y evitar problemas conductuales en los hijos.Conclusión: Es aquí donde el licenciado en enfermería tiene una área de oportunidad, desempeñando su rol de educador y facilitador hacia el ámbito social para ayudar a estas nuevas familias a ser aceptadas como parte de la sociedad. A partir de aquí se pueden generar modelos de atención a la salud para este nuevo tipo de familias. SUMMARY Objective: Know the difference between adolescent psycho-social experiences in homoparental and heteroparental family. Methodology: This was a qualitative and exploratory type study, of cross-sectional using the phenomenological method for interpreting the results categorized into macro and microcategories. Results were presented in charts that represent the macrocategories and microcategories, in the word processor Microsoft Office Word 2007. According to the interpretation of data, the conclusion was made as the final part of the investigation. Discussion: A study in U.S.A. made by Suzanne Brown, Susan Smalling and Victor Groza shows that education in homoparental family doesn’t influence in the sexual orientation of adolescents raised by such couples, however, the study has shown some discrimination of the society towards them for what they have had to seek emotional support for the whole family and avoid behavioral problems in their children. Conclusion: This is where the professional of nursing have an area of opportunity, to play its role as an educator and facilitator in the social environment to help these new families to be accepted as part of society. From here you can generate models of health care for this new type of family

Fatty Acids, Hydrocarbons and Terpenes of Nannochloropsis and Nannochloris Isolates with Potential for Biofuel Production

Marine microalgae are a promising feedstock for biofuel production given their high growth rates and biomass production together with cost reductions due to the use of seawater for culture preparation. However, different microalgae species produce different families of compounds. Some compounds could be used directly as fuels, while others require thermochemical processing to obtain quality biofuels. This work focuses on the characterization of three marine microalgae strains native in Mexico and reported for the first time. Ultrastructure and phylogenetic analysis, suggested that they belong to Nannochloropsis sp. (NSRE-1 and NSRE-2) and Nannochloris sp. (NRRE-1). The composition of their lipid fractions included hydrocarbons, triacylglycerides (TAGs), free fatty acids (FFAs) and terpenes. Based on theoretical estimations from TAG and FFA composition, the potential biodiesels were found to comply with six of the seven estimated properties (ASTM D6751 and EN 14214). On the other hand, hydrocarbons and terpenes synthesized by the strains have outstanding potential as precursors for the production of other renewable fuels, mainly green diesel and bio-jet fuel, which are “drop-in” fuels with quality properties similar to fossil fuels. The validity of this theoretical analysis was demonstrated for the oxygenates of strain NSRE-2, which were experimentally hydrodeoxygenated, obtaining a high-quality renewable diesel as the reaction product

Determination of blood dexmedetomidine in dried blood spots by LC-MS/MS to screen therapeutic levels in paediatric patients.

Dexmedetomidine is an imidazole derivative, with high affinity for α2 adrenergic receptors, used for sedation, analgesia and adjuvant anaesthesia. In this study, an analytical method for the quantification of dexmedetomidine in dried blood spots was developed, validated and applied. The drug was extracted from dried blood spot by liquid extraction; the separation was carried out by ultra high-resolution liquid chromatography in reverse phase coupled to tandem mass spectrometry method. An X Select cyano 5 μm HSS column (2.1 X 150 mm, Waters) and a mobile phase composed of 0.1% formic acid: acetonitrile [50:50 v/v], were used. The test was linear over the concentration range of 50 to 2000 pg/mL. The coefficients of variation for the intra and interday trials were less than 15%. The drug was stable under the conditions tested. The method was successfully applied for the quantification of 6 patients, aged 0 to 2 years, with classification ASA I, who underwent ambulatory surgeries, receiving a dose of 1 μg/Kg dexmedetomidine IV. The drug concentrations in the different sampling times were in the range of 76 to 868 pg/mL